Release v2.7.6

docker/Dockerfile.chat

@@ -16,7 +16,7 @@ RUN mkdir -p /root/.praison
 # Install Python packages (using latest versions)
 RUN pip install --no-cache-dir \
     praisonai_tools \
-    "praisonai>=2.7.3" \
+    "praisonai>=2.7.6" \
     "praisonai[chat]" \
     "embedchain[github,youtube]"
 

docker/Dockerfile.dev

@@ -20,7 +20,7 @@ RUN mkdir -p /root/.praison
 # Install Python packages (using latest versions)
 RUN pip install --no-cache-dir \
     praisonai_tools \
-    "praisonai>=2.7.3" \
+    "praisonai>=2.7.6" \
     "praisonai[ui]" \
     "praisonai[chat]" \
     "praisonai[realtime]" \

docker/Dockerfile.ui

@@ -16,7 +16,7 @@ RUN mkdir -p /root/.praison
 # Install Python packages (using latest versions)
 RUN pip install --no-cache-dir \
     praisonai_tools \
-    "praisonai>=2.7.3" \
+    "praisonai>=2.7.6" \
     "praisonai[ui]" \
     "praisonai[crewai]"
 

examples/README.md

@@ -14,6 +14,7 @@ examples/
 │   ├── memory/       # Memory and sessions
 │   ├── code/         # Code editing and external CLI tools
 │   └── ...
+├── serve/            # Server and endpoints examples
 ├── yaml/             # YAML workflow examples
 └── cookbooks/        # Complete use-case examples
 ```
@@ -31,6 +32,22 @@ examples/
 | **Code** | [python/code/](python/code/) | [📖](https://docs.praison.ai/code) |
 | **YAML** | [yaml/](yaml/) | [📖](https://docs.praison.ai/features/yaml-workflows) |
 | **Doctor** | [doctor/](doctor/) | [📖](https://docs.praison.ai/cli/doctor) |
+| **Serve** | [serve/](serve/) | [📖](https://docs.praison.ai/cli/serve) |
+| **Endpoints** | [serve/](serve/) | [📖](https://docs.praison.ai/cli/endpoints) |
+
+## Serve Examples
+
+| Example | Description | CLI Command |
+|---------|-------------|-------------|
+| [unified_server.py](serve/unified_server.py) | All providers in one server | `praisonai serve unified` |
+| [agent_as_api_single.py](serve/agent_as_api_single.py) | Single agent HTTP API | `praisonai serve agents` |
+| [agents_as_api_router.py](serve/agents_as_api_router.py) | Multi-agent router API | `praisonai serve agents` |
+| [a2a_server_client.py](serve/a2a_server_client.py) | A2A protocol server | `praisonai serve a2a` |
+| [a2u_events_stream.py](serve/a2u_events_stream.py) | A2U event stream | `praisonai serve a2u` |
+| [mcp_http_server.py](serve/mcp_http_server.py) | MCP HTTP server | `praisonai serve mcp` |
+| [tools_as_mcp_server.py](serve/tools_as_mcp_server.py) | Tools as MCP server | `praisonai serve tools` |
+| [agent_launch_modes.py](serve/agent_launch_modes.py) | Agent.launch() API | Python only |
+| [endpoints_unified_client.py](serve/endpoints_unified_client.py) | Unified client | `praisonai endpoints` |
 
 ## Running Examples
 

examples/package_manager/README.md

@@ -0,0 +1,101 @@
+# Package Manager Example
+
+This example demonstrates how to use the PraisonAI package manager for installing and managing Python packages with security defaults.
+
+## Features Demonstrated
+
+- Installing packages with version constraints
+- Listing installed packages
+- Searching for packages on PyPI
+- Managing package index configuration
+- Security features (dependency confusion prevention)
+
+## Quick Start
+
+```bash
+# Run the example
+python package_manager_example.py
+```
+
+## CLI Commands
+
+### Install Packages
+
+```bash
+# Install a package
+praisonai install requests
+
+# Install with version constraint
+praisonai install "requests>=2.28"
+
+# Install multiple packages
+praisonai install requests httpx aiohttp
+
+# Upgrade existing package
+praisonai install requests --upgrade
+
+# JSON output
+praisonai install requests --json
+```
+
+### Uninstall Packages
+
+```bash
+# Uninstall a package
+praisonai uninstall requests
+
+# Uninstall without confirmation
+praisonai uninstall requests --yes
+```
+
+### List Packages
+
+```bash
+# List all installed packages
+praisonai package list
+
+# JSON output
+praisonai package list --json
+```
+
+### Search Packages
+
+```bash
+# Search PyPI
+praisonai package search langchain
+
+# JSON output
+praisonai package search langchain --json
+```
+
+### Index Configuration
+
+```bash
+# Show current index settings
+praisonai package index show --json
+
+# Set custom index
+praisonai package index set https://pypi.mycompany.com/simple
+
+# Reset to PyPI default
+praisonai package index set https://pypi.org/simple
+```
+
+## Security Features
+
+By default, only the primary index (PyPI) is used. Extra indexes are blocked to prevent dependency confusion attacks.
+
+```bash
+# This will FAIL (extra index not allowed by default)
+praisonai install mypackage --extra-index-url https://other.index.com/simple
+
+# Explicitly allow extra index (shows security warning)
+praisonai install mypackage \
+  --extra-index-url https://other.index.com/simple \
+  --allow-extra-index
+```
+
+## Environment Variables
+
+- `PRAISONAI_PACKAGE_INDEX_URL` - Override primary index URL
+- `PIP_INDEX_URL` - Fallback to pip's index URL

examples/package_manager/package_manager_example.py

@@ -0,0 +1,143 @@
+#!/usr/bin/env python3
+"""
+Package Manager Example
+
+This example demonstrates:
+1. Checking package index configuration
+2. Searching for packages on PyPI
+3. Listing installed packages
+4. Security features (safe defaults)
+
+Requirements:
+- praisonai installed
+- No external API keys required
+
+Note: This example does NOT actually install/uninstall packages
+to avoid modifying your environment. It demonstrates read-only
+operations and shows the commands for install/uninstall.
+"""
+
+import sys
+import json
+import subprocess
+
+
+def run_command(args, description):
+    """Run a praisonai command and display results."""
+    print(f"\n[{description}]")
+    print(f"Command: praisonai {' '.join(args)}")
+    print("-" * 40)
+    
+    result = subprocess.run(
+        ["python3", "-m", "praisonai"] + args,
+        capture_output=True,
+        text=True
+    )
+    
+    if result.returncode == 0:
+        try:
+            data = json.loads(result.stdout)
+            print(json.dumps(data, indent=2))
+            return data
+        except json.JSONDecodeError:
+            print(result.stdout)
+            return None
+    else:
+        print(f"Error (exit code {result.returncode}):")
+        print(result.stderr or result.stdout)
+        return None
+
+
+def main():
+    print("=" * 60)
+    print("PraisonAI Package Manager Example")
+    print("=" * 60)
+    print("\nThis example demonstrates package manager features.")
+    print("No packages will be installed or uninstalled.")
+    
+    # 1. Show index configuration
+    print("\n" + "=" * 60)
+    print("1. PACKAGE INDEX CONFIGURATION")
+    print("=" * 60)
+    
+    data = run_command(
+        ["package", "index", "show", "--json"],
+        "Show current index settings"
+    )
+    
+    if data:
+        print(f"\n✓ Primary index: {data.get('index_url', 'N/A')}")
+        print(f"✓ Extra indexes allowed: {data.get('allow_extra_index', False)}")
+    
+    # 2. Search for packages
+    print("\n" + "=" * 60)
+    print("2. SEARCH PACKAGES")
+    print("=" * 60)
+    
+    data = run_command(
+        ["package", "search", "requests", "--json"],
+        "Search for 'requests' package"
+    )
+    
+    if data and data.get("results"):
+        pkg = data["results"][0]
+        print(f"\n✓ Found: {pkg.get('name')} v{pkg.get('version')}")
+        print(f"  Summary: {pkg.get('summary', 'N/A')}")
+    
+    # 3. List installed packages (sample)
+    print("\n" + "=" * 60)
+    print("3. LIST INSTALLED PACKAGES")
+    print("=" * 60)
+    
+    data = run_command(
+        ["package", "list", "--json"],
+        "List installed packages"
+    )
+    
+    if data and data.get("packages"):
+        print(f"\n✓ Total packages: {len(data['packages'])}")
+        print("  Sample (first 5):")
+        for pkg in data["packages"][:5]:
+            print(f"    - {pkg['name']}=={pkg['version']}")
+    
+    # 4. Show install/uninstall commands (without executing)
+    print("\n" + "=" * 60)
+    print("4. INSTALL/UNINSTALL COMMANDS (NOT EXECUTED)")
+    print("=" * 60)
+    
+    print("\nTo install packages, use:")
+    print("  praisonai install requests")
+    print("  praisonai install 'requests>=2.28'")
+    print("  praisonai install requests httpx --upgrade")
+    
+    print("\nTo uninstall packages, use:")
+    print("  praisonai uninstall requests")
+    print("  praisonai uninstall requests --yes")
+    
+    # 5. Security features
+    print("\n" + "=" * 60)
+    print("5. SECURITY FEATURES")
+    print("=" * 60)
+    
+    print("\nDependency Confusion Prevention:")
+    print("  - By default, only PyPI is used as package source")
+    print("  - Extra index URLs are blocked unless explicitly allowed")
+    print("  - Use --allow-extra-index to enable (shows warning)")
+    
+    print("\nExample (blocked by default):")
+    print("  praisonai install pkg --extra-index-url https://other.index.com/simple")
+    print("  → Error: Extra index URLs not allowed")
+    
+    print("\nExample (explicitly allowed):")
+    print("  praisonai install pkg --extra-index-url https://other.index.com/simple --allow-extra-index")
+    print("  → Warning shown, then proceeds")
+    
+    print("\n" + "=" * 60)
+    print("Example completed!")
+    print("=" * 60)
+    
+    return 0
+
+
+if __name__ == "__main__":
+    sys.exit(main())

examples/recipes/creator_suite/.env.example

@@ -0,0 +1,11 @@
+# Creator Suite Examples - Environment Variables
+
+# Required for most features
+OPENAI_API_KEY=your_openai_api_key_here
+
+# Optional - for web search in news crawler
+TAVILY_API_KEY=your_tavily_api_key_here
+
+# Optional - for additional LLM providers
+ANTHROPIC_API_KEY=your_anthropic_api_key_here
+GOOGLE_API_KEY=your_google_api_key_here

examples/recipes/creator_suite/README.md

@@ -0,0 +1,77 @@
+# Creator Suite Examples
+
+Examples for the PraisonAI Creator Automation Suite - a complete toolkit for AI content creators.
+
+## Quick Start
+
+```bash
+# Set your API key
+export OPENAI_API_KEY=your_key_here
+
+# Run an example
+python news_crawler_example.py
+python script_writer_example.py
+python hook_generator_example.py
+python brief_generator_example.py
+```
+
+## Examples
+
+| Example | Description | API Key Required |
+|---------|-------------|------------------|
+| `news_crawler_example.py` | Crawl AI news from multiple sources | No (HN, arXiv) |
+| `script_writer_example.py` | Generate scripts for YouTube, X, LinkedIn | Yes (OpenAI) |
+| `hook_generator_example.py` | Generate attention-grabbing hooks | Yes (OpenAI) |
+| `brief_generator_example.py` | Generate news briefs | Yes (OpenAI) |
+
+## Environment Variables
+
+Copy `.env.example` to `.env` and fill in your API keys:
+
+```bash
+cp .env.example .env
+```
+
+## Features Covered
+
+### News Intelligence Layer
+- AI News Crawler
+- AI News Deduper
+- AI Signal Ranker
+- AI Context Enricher
+- AI Brief Generator
+
+### Script & Story Layer
+- AI Script Writer
+- AI Angle Generator
+- AI Hook Generator
+- AI CTA Generator
+- AI Fact Checker
+
+### Capture & Screen Automation
+- AI Screenshot Capture
+- AI Screen Recorder
+- AI News Capture Pack
+
+### Video Generation
+- AI B-roll Builder
+- AI Voiceover Generator
+- AI Video Merger
+
+### Publishing & Distribution
+- AI Publisher Pack
+- AI Content Calendar
+- AI Post Copy Generator
+- AI Hashtag Optimizer
+
+### Feedback & Learning
+- AI Performance Analyzer
+- AI Comment Miner
+- AI A/B Hook Tester
+
+### Orchestrator
+- AI Daily News Show (end-to-end pipeline)
+
+## Documentation
+
+Full documentation: https://docs.praison.ai/docs/ai-tools/creator-suite/

examples/recipes/creator_suite/brief_generator_example.py

@@ -0,0 +1,71 @@
+#!/usr/bin/env python3
+"""
+AI Brief Generator Example
+
+Demonstrates generating news briefs from articles.
+Requires: OPENAI_API_KEY
+"""
+
+import os
+import sys
+
+# Check for API key
+if not os.environ.get("OPENAI_API_KEY"):
+    print("ERROR: OPENAI_API_KEY environment variable required")
+    print("Set it with: export OPENAI_API_KEY=your_key")
+    sys.exit(1)
+
+# Add the Agent-Recipes templates to path
+sys.path.insert(0, '/Users/praison/Agent-Recipes/agent_recipes/templates/ai-brief-generator')
+
+from tools import generate_brief, extract_highlights
+
+
+def main():
+    print("=" * 60)
+    print("AI Brief Generator Example")
+    print("=" * 60)
+    
+    # Sample articles
+    articles = [
+        {
+            "title": "OpenAI Releases GPT-5 with Multimodal Capabilities",
+            "content": "OpenAI announced GPT-5 today with major improvements in reasoning, multimodal understanding, and reduced hallucinations.",
+            "source": "TechCrunch",
+            "url": "https://example.com/gpt5"
+        },
+        {
+            "title": "Google Gemini 2.0 Launches with Real-time Video Understanding",
+            "content": "Google unveiled Gemini 2.0 with breakthrough capabilities in real-time video analysis and native tool use.",
+            "source": "The Verge",
+            "url": "https://example.com/gemini2"
+        },
+        {
+            "title": "Anthropic Claude 4 Sets New Benchmarks",
+            "content": "Anthropic's Claude 4 achieves state-of-the-art results on coding, math, and reasoning benchmarks.",
+            "source": "Wired",
+            "url": "https://example.com/claude4"
+        }
+    ]
+    
+    # 1. Generate daily brief
+    print("\n1. Generating daily brief...")
+    brief = generate_brief(articles, format="daily", max_articles=3)
+    print(f"   Format: daily")
+    print(f"   Articles included: {brief.get('article_count', 0)}")
+    print(f"\n   Brief preview:\n   {brief.get('brief', '')[:500]}...")
+    
+    # 2. Extract highlights
+    print("\n2. Extracting highlights...")
+    highlights = extract_highlights(articles, num_highlights=3)
+    print(f"   Highlights:")
+    for h in highlights.get('highlights', []):
+        print(f"   - {h}")
+    
+    print("\n" + "=" * 60)
+    print("Example completed successfully!")
+    print("=" * 60)
+
+
+if __name__ == "__main__":
+    main()

examples/recipes/creator_suite/hook_generator_example.py

@@ -0,0 +1,53 @@
+#!/usr/bin/env python3
+"""
+AI Hook Generator Example
+
+Demonstrates generating attention-grabbing hooks.
+Requires: OPENAI_API_KEY
+"""
+
+import os
+import sys
+
+# Check for API key
+if not os.environ.get("OPENAI_API_KEY"):
+    print("ERROR: OPENAI_API_KEY environment variable required")
+    print("Set it with: export OPENAI_API_KEY=your_key")
+    sys.exit(1)
+
+# Add the Agent-Recipes templates to path
+sys.path.insert(0, '/Users/praison/Agent-Recipes/agent_recipes/templates/ai-hook-generator')
+
+from tools import generate_hooks, rank_hooks
+
+
+def main():
+    print("=" * 60)
+    print("AI Hook Generator Example")
+    print("=" * 60)
+    
+    topic = "GPT-5 just released with groundbreaking capabilities"
+    
+    # 1. Generate hooks
+    print(f"\n1. Generating hooks for: '{topic}'")
+    hooks = generate_hooks(topic, num_variants=5)
+    print(f"   Generated {len(hooks.get('hooks', []))} hooks:")
+    
+    for hook in hooks.get('hooks', []):
+        print(f"\n   [{hook.get('style', 'unknown')}]")
+        print(f"   {hook.get('text', '')}")
+    
+    # 2. Rank hooks
+    print("\n2. Ranking hooks by engagement potential...")
+    ranked = rank_hooks(hooks.get('hooks', []))
+    best = ranked.get('best_hook', {})
+    print(f"\n   Best hook (score: {best.get('score', 0)}):")
+    print(f"   {best.get('text', '')}")
+    
+    print("\n" + "=" * 60)
+    print("Example completed successfully!")
+    print("=" * 60)
+
+
+if __name__ == "__main__":
+    main()

examples/recipes/creator_suite/news_crawler_example.py

@@ -0,0 +1,52 @@
+#!/usr/bin/env python3
+"""
+AI News Crawler Example
+
+Demonstrates crawling AI news from multiple sources.
+"""
+
+import os
+import sys
+
+# Add the Agent-Recipes templates to path
+sys.path.insert(0, '/Users/praison/Agent-Recipes/agent_recipes/templates/ai-news-crawler')
+
+from tools import crawl_hackernews, crawl_reddit_ai, crawl_arxiv, crawl_ai_news
+
+
+def main():
+    print("=" * 60)
+    print("AI News Crawler Example")
+    print("=" * 60)
+    
+    # 1. Crawl HackerNews (no API key needed)
+    print("\n1. Crawling HackerNews...")
+    hn_articles = crawl_hackernews(max_articles=5, time_window_hours=48)
+    print(f"   Found {len(hn_articles)} articles from HackerNews")
+    for article in hn_articles[:3]:
+        print(f"   - {article.get('title', 'No title')[:60]}...")
+    
+    # 2. Crawl arXiv (no API key needed)
+    print("\n2. Crawling arXiv...")
+    arxiv_articles = crawl_arxiv(categories=["cs.AI", "cs.LG"], max_results=5)
+    print(f"   Found {len(arxiv_articles)} articles from arXiv")
+    for article in arxiv_articles[:3]:
+        print(f"   - {article.get('title', 'No title')[:60]}...")
+    
+    # 3. Full crawl from multiple sources
+    print("\n3. Full multi-source crawl...")
+    all_articles = crawl_ai_news(
+        sources=["hackernews", "arxiv"],
+        max_articles=10,
+        time_window_hours=48
+    )
+    print(f"   Total articles: {all_articles.get('total', 0)}")
+    print(f"   Sources crawled: {all_articles.get('sources_crawled', [])}")
+    
+    print("\n" + "=" * 60)
+    print("Example completed successfully!")
+    print("=" * 60)
+
+
+if __name__ == "__main__":
+    main()

examples/recipes/creator_suite/script_writer_example.py

@@ -0,0 +1,61 @@
+#!/usr/bin/env python3
+"""
+AI Script Writer Example
+
+Demonstrates generating scripts for different platforms.
+Requires: OPENAI_API_KEY
+"""
+
+import os
+import sys
+
+# Check for API key
+if not os.environ.get("OPENAI_API_KEY"):
+    print("ERROR: OPENAI_API_KEY environment variable required")
+    print("Set it with: export OPENAI_API_KEY=your_key")
+    sys.exit(1)
+
+# Add the Agent-Recipes templates to path
+sys.path.insert(0, '/Users/praison/Agent-Recipes/agent_recipes/templates/ai-script-writer')
+
+from tools import write_youtube_script, write_short_script, write_thread
+
+
+def main():
+    print("=" * 60)
+    print("AI Script Writer Example")
+    print("=" * 60)
+    
+    topic = "AI agents are revolutionizing software development"
+    
+    # 1. YouTube Long-form Script
+    print("\n1. Generating YouTube long-form script...")
+    yt_script = write_youtube_script(
+        topic=topic,
+        target_length=180,
+        key_points=["automation", "productivity", "future of coding"]
+    )
+    print(f"   Format: {yt_script.get('format')}")
+    print(f"   Estimated duration: {yt_script.get('estimated_duration')}s")
+    print(f"   Script preview:\n   {yt_script.get('script', '')[:200]}...")
+    
+    # 2. YouTube Short Script
+    print("\n2. Generating YouTube Short script...")
+    short_script = write_short_script(topic, duration=30)
+    print(f"   Format: {short_script.get('format')}")
+    print(f"   Script:\n   {short_script.get('script', '')[:300]}...")
+    
+    # 3. X Thread
+    print("\n3. Generating X thread...")
+    thread = write_thread(topic, num_tweets=3)
+    print(f"   Thread ({len(thread.get('tweets', []))} tweets):")
+    for i, tweet in enumerate(thread.get('tweets', [])[:3], 1):
+        print(f"   Tweet {i}: {tweet[:80]}...")
+    
+    print("\n" + "=" * 60)
+    print("Example completed successfully!")
+    print("=" * 60)
+
+
+if __name__ == "__main__":
+    main()

examples/recipes/example_llm_recipes.py

@@ -0,0 +1,143 @@
+#!/usr/bin/env python3
+"""
+Example: LLM-based Recipes
+
+Demonstrates usage of LLM-powered recipes:
+- ai-blog-generator
+- ai-social-media-generator
+- ai-faq-generator
+- ai-sentiment-analyzer
+"""
+
+import os
+import sys
+
+# Ensure API key is set
+if not os.environ.get("OPENAI_API_KEY"):
+    print("Please set OPENAI_API_KEY environment variable")
+    sys.exit(1)
+
+# Add recipe tools to path
+sys.path.insert(0, "/Users/praison/PraisonAI-tools/praisonai_tools/recipe_tools")
+
+from llm_tool import LLMTool, llm_complete
+
+
+def example_blog_generator():
+    """Generate a blog post."""
+    print("\n=== AI Blog Generator ===")
+    
+    llm = LLMTool(provider="openai", model="gpt-4o-mini")
+    
+    topic = "The Future of AI in Healthcare"
+    
+    response = llm.complete(
+        f"""Write a short blog post (3 paragraphs) about: {topic}
+        
+Include:
+- Engaging introduction
+- Key points
+- Call to action
+
+Format as markdown.""",
+        system="You are an expert blog writer specializing in technology topics.",
+        max_tokens=500,
+    )
+    
+    print(f"Topic: {topic}")
+    print(f"\nGenerated Blog Post:\n{response.content}")
+    print(f"\nTokens used: {response.usage.get('total_tokens', 'N/A')}")
+
+
+def example_social_media_generator():
+    """Generate social media posts."""
+    print("\n=== AI Social Media Generator ===")
+    
+    llm = LLMTool(provider="openai", model="gpt-4o-mini")
+    
+    content = "We just launched our new AI-powered productivity app!"
+    
+    response = llm.complete(
+        f"""Create social media posts for the following announcement:
+{content}
+
+Generate posts for:
+1. Twitter (280 chars max)
+2. LinkedIn (professional tone)
+3. Instagram (with emoji suggestions)
+
+Format each clearly.""",
+        system="You are a social media marketing expert.",
+        max_tokens=400,
+    )
+    
+    print(f"Content: {content}")
+    print(f"\nGenerated Posts:\n{response.content}")
+
+
+def example_faq_generator():
+    """Generate FAQ from content."""
+    print("\n=== AI FAQ Generator ===")
+    
+    llm = LLMTool(provider="openai", model="gpt-4o-mini")
+    
+    documentation = """
+    Our product is a cloud-based project management tool.
+    It supports team collaboration, task tracking, and reporting.
+    Pricing starts at $10/month per user.
+    We offer a 14-day free trial.
+    Integration with Slack, GitHub, and Jira is available.
+    """
+    
+    response = llm.complete(
+        f"""Based on this documentation, generate 5 FAQ questions and answers:
+
+{documentation}
+
+Format as:
+Q: [question]
+A: [answer]
+""",
+        system="You are a technical writer creating FAQ documentation.",
+        max_tokens=400,
+    )
+    
+    print(f"Generated FAQ:\n{response.content}")
+
+
+def example_sentiment_analyzer():
+    """Analyze sentiment in text."""
+    print("\n=== AI Sentiment Analyzer ===")
+    
+    llm = LLMTool(provider="openai", model="gpt-4o-mini")
+    
+    reviews = [
+        "This product is amazing! Best purchase ever.",
+        "Terrible experience. Would not recommend.",
+        "It's okay, nothing special but does the job.",
+    ]
+    
+    for review in reviews:
+        response = llm.complete(
+            f"""Analyze the sentiment of this text and respond with ONLY one word: POSITIVE, NEGATIVE, or NEUTRAL
+
+Text: {review}""",
+            max_tokens=10,
+        )
+        print(f"Review: {review[:50]}...")
+        print(f"Sentiment: {response.content.strip()}\n")
+
+
+if __name__ == "__main__":
+    print("=" * 60)
+    print("LLM-Based Recipes Examples")
+    print("=" * 60)
+    
+    example_blog_generator()
+    example_social_media_generator()
+    example_faq_generator()
+    example_sentiment_analyzer()
+    
+    print("\n" + "=" * 60)
+    print("All examples completed!")
+    print("=" * 60)

examples/registry/README.md

@@ -1,48 +1,71 @@
 # Recipe Registry Example
 
-This example demonstrates how to use the PraisonAI recipe registry for publishing and pulling recipes.
+This example demonstrates how to use the PraisonAI recipe registry for publishing and pulling recipes via both local filesystem and HTTP server.
 
 ## Features Demonstrated
 
 - Creating a local registry
-- Packing recipes into bundles
-- Publishing recipes to the registry
+- Starting an HTTP registry server
+- Publishing recipes with token authentication
 - Listing and searching recipes
-- Pulling recipes from the registry
+- Pulling recipes from HTTP registry
 
 ## Quick Start
 
 ```bash
-# Run the example
-python registry_example.py
+# Run the HTTP registry example
+python http_registry_example.py
 ```
 
-## CLI Commands
+## HTTP Registry Server
 
 ```bash
-# Publish a recipe
+# Start HTTP registry server
+praisonai registry serve --port 7777
+
+# Start with authentication
+praisonai registry serve --port 7777 --token mysecret
+
+# Check server status
+praisonai registry status --registry http://localhost:7777
+```
+
+## CLI Commands with HTTP Registry
+
+```bash
+# Publish to HTTP registry
+praisonai recipe publish ./my-recipe --registry http://localhost:7777 --json
+
+# Publish with token
+praisonai recipe publish ./my-recipe --registry http://localhost:7777 --token mysecret
+
+# Pull from HTTP registry
+praisonai recipe pull [email protected] --registry http://localhost:7777 -o ./recipes
+
+# List recipes from HTTP registry
+praisonai recipe list --registry http://localhost:7777 --json
+
+# Search HTTP registry
+praisonai recipe search "hello" --registry http://localhost:7777
+```
+
+## Local Registry Commands
+
+```bash
+# Publish to local registry (default)
 praisonai recipe publish ./my-recipe --json
 
-# Pull a recipe
+# Pull from local registry
 praisonai recipe pull [email protected] -o ./recipes
 
-# List recipes in registry
-praisonai recipe list --json
-
-# Search recipes
-praisonai recipe search "hello"
-```
-
-## Using a Custom Registry Path
-
-```bash
-# Publish to custom registry
+# Use custom local path
 praisonai recipe publish ./my-recipe --registry /path/to/registry
-
-# Pull from custom registry
-praisonai recipe pull [email protected] --registry /path/to/registry
 ```
 
+## Environment Variables
+
+- `PRAISONAI_REGISTRY_TOKEN` - Default token for HTTP registry authentication
+
 ## Default Registry Location
 
-By default, the registry is stored at `~/.praison/registry`.
+By default, the local registry is stored at `~/.praison/registry`.

examples/registry/http_registry_example.py

@@ -0,0 +1,230 @@
+#!/usr/bin/env python3
+"""
+HTTP Recipe Registry Example
+
+This example demonstrates:
+1. Starting an HTTP registry server programmatically
+2. Publishing recipes with token authentication
+3. Listing and searching recipes via HTTP
+4. Pulling recipes from HTTP registry
+
+Requirements:
+- praisonai installed
+- No external API keys required (local registry only)
+
+Environment Variables (optional):
+- PRAISONAI_REGISTRY_TOKEN: Token for authentication
+"""
+
+import sys
+import json
+import time
+import shutil
+import tarfile
+import tempfile
+import subprocess
+from pathlib import Path
+
+def create_sample_recipe(output_dir: Path) -> Path:
+    """Create a sample recipe for testing."""
+    recipe_dir = output_dir / "sample-agent"
+    recipe_dir.mkdir(parents=True, exist_ok=True)
+    
+    # Create manifest.json
+    manifest = {
+        "name": "sample-agent",
+        "version": "1.0.0",
+        "description": "A sample agent recipe for registry testing",
+        "tags": ["sample", "agent", "test"],
+        "author": "praison",
+        "files": ["recipe.yaml"]
+    }
+    (recipe_dir / "manifest.json").write_text(json.dumps(manifest, indent=2))
+    
+    # Create recipe.yaml
+    recipe_yaml = """
+name: sample-agent
+version: "1.0.0"
+description: A sample agent recipe
+
+agents:
+  - name: assistant
+    role: General Assistant
+    goal: Help users with their questions
+    instructions: You are a helpful assistant.
+
+tasks:
+  - name: respond
+    description: Respond to user query
+    agent: assistant
+"""
+    (recipe_dir / "recipe.yaml").write_text(recipe_yaml.strip())
+    
+    # Pack into .praison bundle
+    bundle_path = output_dir / "sample-agent-1.0.0.praison"
+    with tarfile.open(bundle_path, "w:gz") as tar:
+        for file in recipe_dir.iterdir():
+            tar.add(file, arcname=file.name)
+    
+    return bundle_path
+
+
+def start_registry_server(port: int, registry_path: Path, token: str = None):
+    """Start registry server in background process."""
+    cmd = [
+        sys.executable, "-c",
+        f"""
+import sys
+sys.path.insert(0, '/Users/praison/praisonai-package/src/praisonai')
+from praisonai.recipe.server import create_wsgi_app
+from wsgiref.simple_server import make_server, WSGIRequestHandler
+from pathlib import Path
+
+class QuietHandler(WSGIRequestHandler):
+    def log_message(self, format, *args):
+        pass
+
+app = create_wsgi_app(registry_path=Path("{registry_path}"), token={repr(token)})
+server = make_server("127.0.0.1", {port}, app, handler_class=QuietHandler)
+server.serve_forever()
+"""
+    ]
+    
+    proc = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+    return proc
+
+
+def main():
+    print("=" * 60)
+    print("HTTP Recipe Registry Example")
+    print("=" * 60)
+    
+    # Setup
+    work_dir = Path(tempfile.mkdtemp(prefix="registry_example_"))
+    registry_path = work_dir / "registry"
+    pulled_dir = work_dir / "pulled"
+    port = 7799
+    token = "example-secret-token"
+    
+    print(f"\nWork directory: {work_dir}")
+    print(f"Registry path: {registry_path}")
+    print(f"Server port: {port}")
+    print(f"Token: {'*' * len(token)} (redacted)")
+    
+    try:
+        # 1. Create sample recipe
+        print("\n[1] Creating sample recipe...")
+        bundle_path = create_sample_recipe(work_dir)
+        print(f"    ✓ Created bundle: {bundle_path.name}")
+        
+        # 2. Start HTTP registry server
+        print("\n[2] Starting HTTP registry server...")
+        server = start_registry_server(port, registry_path, token)
+        time.sleep(1)  # Wait for server to start
+        print(f"    ✓ Server running on http://127.0.0.1:{port}")
+        
+        # 3. Check health
+        print("\n[3] Checking server health...")
+        result = subprocess.run(
+            ["curl", "-s", f"http://127.0.0.1:{port}/healthz"],
+            capture_output=True, text=True
+        )
+        health = json.loads(result.stdout)
+        print(f"    Status: {health['status']}")
+        print(f"    Auth required: {health['auth_required']}")
+        
+        # 4. Publish WITHOUT token (should fail)
+        print("\n[4] Publishing WITHOUT token (expect failure)...")
+        result = subprocess.run(
+            ["python3", "-m", "praisonai", "recipe", "publish", str(bundle_path),
+             "--registry", f"http://127.0.0.1:{port}", "--json"],
+            capture_output=True, text=True,
+            cwd="/Users/praison/praisonai-package/src/praisonai"
+        )
+        if result.returncode != 0 or "error" in result.stdout.lower() or "401" in result.stdout:
+            print("    ✓ Correctly rejected (authentication required)")
+        else:
+            print(f"    ✗ Unexpected success: {result.stdout}")
+        
+        # 5. Publish WITH token (should succeed)
+        print("\n[5] Publishing WITH token...")
+        result = subprocess.run(
+            ["python3", "-m", "praisonai", "recipe", "publish", str(bundle_path),
+             "--registry", f"http://127.0.0.1:{port}", "--token", token, "--json"],
+            capture_output=True, text=True,
+            cwd="/Users/praison/praisonai-package/src/praisonai"
+        )
+        try:
+            data = json.loads(result.stdout)
+            if data.get("ok"):
+                print(f"    ✓ Published: {data['name']}@{data['version']}")
+            else:
+                print(f"    ✗ Failed: {result.stdout}")
+                return 1
+        except json.JSONDecodeError:
+            print(f"    Output: {result.stdout}")
+            print(f"    Stderr: {result.stderr}")
+            return 1
+        
+        # 6. List recipes
+        print("\n[6] Listing recipes from registry...")
+        result = subprocess.run(
+            ["python3", "-m", "praisonai", "recipe", "list",
+             "--registry", f"http://127.0.0.1:{port}", "--json"],
+            capture_output=True, text=True,
+            cwd="/Users/praison/praisonai-package/src/praisonai"
+        )
+        recipes = json.loads(result.stdout)
+        print(f"    Found {len(recipes)} recipe(s):")
+        for r in recipes:
+            print(f"      - {r['name']} v{r['version']}: {r.get('description', '')[:40]}")
+        
+        # 7. Search recipes
+        print("\n[7] Searching for 'agent'...")
+        result = subprocess.run(
+            ["python3", "-m", "praisonai", "recipe", "search", "agent",
+             "--registry", f"http://127.0.0.1:{port}", "--json"],
+            capture_output=True, text=True,
+            cwd="/Users/praison/praisonai-package/src/praisonai"
+        )
+        matches = json.loads(result.stdout)
+        print(f"    Found {len(matches)} match(es)")
+        
+        # 8. Pull recipe
+        print("\n[8] Pulling recipe...")
+        pulled_dir.mkdir(parents=True, exist_ok=True)
+        result = subprocess.run(
+            ["python3", "-m", "praisonai", "recipe", "pull", "sample-agent",
+             "--registry", f"http://127.0.0.1:{port}", "-o", str(pulled_dir), "--json"],
+            capture_output=True, text=True,
+            cwd="/Users/praison/praisonai-package/src/praisonai"
+        )
+        data = json.loads(result.stdout)
+        if data.get("ok"):
+            print(f"    ✓ Pulled to: {data['path']}")
+            
+            # Verify content
+            manifest_path = Path(data['path']) / "manifest.json"
+            if manifest_path.exists():
+                manifest = json.loads(manifest_path.read_text())
+                print(f"    ✓ Verified: {manifest['name']}@{manifest['version']}")
+        else:
+            print(f"    ✗ Failed: {result.stdout}")
+        
+        print("\n" + "=" * 60)
+        print("Example completed successfully!")
+        print("=" * 60)
+        
+        # Cleanup
+        server.terminate()
+        server.wait()
+        
+    finally:
+        # Clean up temp directory
+        shutil.rmtree(work_dir, ignore_errors=True)
+    
+    return 0
+
+
+if __name__ == "__main__":
+    sys.exit(main())

examples/serve/README.md

@@ -1,47 +1,72 @@
-# Recipe Server Example
+# PraisonAI Serve Examples
 
-This example demonstrates how to configure and run the PraisonAI recipe server with authentication.
+Examples for all PraisonAI server types and the unified endpoints CLI.
 
-## Files
+## Examples
 
-- `serve.yaml` - Server configuration file
-- `serve_example.py` - Python client example with authentication
+| Example | Description | CLI Command |
+|---------|-------------|-------------|
+| `unified_server.py` | All providers in one server | `praisonai serve unified` |
+| `agent_as_api_single.py` | Single agent HTTP API | `praisonai serve agents` |
+| `agents_as_api_router.py` | Multi-agent router API | `praisonai serve agents` |
+| `a2a_server_client.py` | A2A protocol server | `praisonai serve a2a` |
+| `a2u_events_stream.py` | A2U event stream | `praisonai serve a2u` |
+| `mcp_http_server.py` | MCP HTTP server | `praisonai serve mcp` |
+| `tools_as_mcp_server.py` | Tools as MCP server | `praisonai serve tools` |
+| `agent_launch_modes.py` | Agent.launch() API | Python only |
+| `endpoints_unified_client.py` | Unified client | `praisonai endpoints` |
+| `serve_example.py` | Recipe server client | `praisonai recipe serve` |
+
+## Server Commands
+
+| Command | Description |
+|---------|-------------|
+| `praisonai serve unified --port 8765` | Start unified server |
+| `praisonai serve agents --file agents.yaml --port 8000` | Start agents API |
+| `praisonai serve recipe --port 8765` | Start recipe server |
+| `praisonai serve mcp --transport http --port 8080` | Start MCP server |
+| `praisonai serve tools --port 8081` | Start tools MCP server |
+| `praisonai serve a2a --port 8082` | Start A2A server |
+| `praisonai serve a2u --port 8083` | Start A2U server |
+
+## Client Commands
+
+| Command | Description |
+|---------|-------------|
+| `praisonai endpoints list` | List all endpoints |
+| `praisonai endpoints list --type agents-api` | Filter by type |
+| `praisonai endpoints describe <name>` | Get endpoint details |
+| `praisonai endpoints invoke <name> --input-json '{}'` | Invoke endpoint |
+| `praisonai endpoints health` | Check server health |
+| `praisonai endpoints types` | List provider types |
+| `praisonai endpoints discovery` | Show discovery document |
 
 ## Quick Start
 
-### 1. Install Dependencies
-
 ```bash
-pip install praisonai[serve]
+# Terminal 1: Start unified server
+export OPENAI_API_KEY=your-key
+praisonai serve unified --port 8765
+
+# Terminal 2: Use endpoints CLI
+praisonai endpoints health
+praisonai endpoints list
+praisonai endpoints types
 ```
 
-### 2. Set Environment Variables
+## Provider Types
 
-```bash
-export OPENAI_API_KEY=your-openai-key
-export PRAISONAI_API_KEY=your-secret-api-key
-```
-
-### 3. Start the Server
-
-```bash
-# Using config file
-praisonai recipe serve --config serve.yaml
-
-# Or with CLI flags
-praisonai recipe serve --port 8765 --auth api-key
-```
-
-### 4. Test with the Example
-
-```bash
-python serve_example.py
-```
+| Type | Description |
+|------|-------------|
+| `recipe` | Recipe runner endpoints |
+| `agents-api` | Single/multi-agent HTTP API |
+| `mcp` | MCP server (stdio, http, sse) |
+| `tools-mcp` | Tools exposed as MCP server |
+| `a2a` | Agent-to-agent protocol |
+| `a2u` | Agent-to-user event stream |
 
 ## Configuration Options
 
-See `serve.yaml` for all available options:
-
 | Option | Description | Default |
 |--------|-------------|---------|
 | `host` | Server bind address | 127.0.0.1 |
@@ -52,6 +77,48 @@ See `serve.yaml` for all available options:
 | `recipes` | List of recipes to serve | all |
 | `cors_origins` | CORS allowed origins | - |
 
+## Advanced Features
+
+| Feature | CLI Flag | Description | Docs |
+|---------|----------|-------------|------|
+| Rate Limiting | `--rate_limit 100` | Requests per minute per client | [Code](/docs/features/recipe-serve-advanced) [CLI](/docs/cli/recipe-serve-advanced) |
+| Request Size Limit | `--max_request_size 10485760` | Max request body (bytes) | [Code](/docs/features/recipe-serve-advanced) [CLI](/docs/cli/recipe-serve-advanced) |
+| Metrics Endpoint | `--enable_metrics` | Prometheus /metrics endpoint | [Code](/docs/features/recipe-serve-advanced) [CLI](/docs/cli/recipe-serve-advanced) |
+| Admin Reload | `--enable_admin` | Hot reload /admin/reload | [Code](/docs/features/recipe-serve-advanced) [CLI](/docs/cli/recipe-serve-advanced) |
+| Workers | `--workers 4` | Multi-process workers | [Code](/docs/features/recipe-serve-advanced) [CLI](/docs/cli/recipe-serve-advanced) |
+| OpenTelemetry | `--trace_exporter otlp` | Distributed tracing | [Code](/docs/features/recipe-serve-advanced) [CLI](/docs/cli/recipe-serve-advanced) |
+| OpenAPI | `GET /openapi.json` | API specification | [Code](/docs/features/recipe-serve-advanced) [CLI](/docs/cli/recipe-serve-advanced) |
+
+## Advanced Examples
+
+| Example | Description |
+|---------|-------------|
+| `recipe_serve_features.py` | All advanced features demo |
+
+## Advanced CLI Commands
+
+```bash
+# Production server with all features
+praisonai recipe serve \
+  --host 0.0.0.0 \
+  --port 8765 \
+  --auth api-key \
+  --workers 4 \
+  --rate_limit 100 \
+  --enable_metrics \
+  --enable_admin
+
+# Get metrics
+curl http://localhost:8765/metrics
+
+# Get OpenAPI spec
+curl http://localhost:8765/openapi.json
+
+# Hot reload recipes
+curl -X POST http://localhost:8765/admin/reload \
+  -H "X-API-Key: your-key"
+```
+
 ## CLI Commands
 
 ```bash

examples/serve/a2a_server_client.py

@@ -0,0 +1,190 @@
+#!/usr/bin/env python3
+"""
+A2A (Agent-to-Agent) Server and Client Example
+
+Demonstrates:
+- Launching an agent as A2A server
+- Agent card discovery
+- Sending A2A messages
+- JSON-RPC protocol
+
+Usage:
+    # Run this example (starts server)
+    python a2a_server_client.py
+    
+    # Or use CLI:
+    praisonai serve a2a --port 8082
+    
+    # Test with curl:
+    curl http://localhost:8082/.well-known/agent.json
+    curl -X POST http://localhost:8082/a2a \
+      -H "Content-Type: application/json" \
+      -d '{"jsonrpc":"2.0","method":"message/send","id":"1","params":{"message":{"role":"user","parts":[{"type":"text","text":"Hello!"}]}}}'
+"""
+
+import os
+import sys
+import json
+import threading
+import time
+
+if not os.environ.get("OPENAI_API_KEY"):
+    print("Error: OPENAI_API_KEY environment variable not set")
+    sys.exit(1)
+
+
+def run_server():
+    """Run A2A server."""
+    try:
+        from praisonaiagents import Agent
+        from praisonaiagents.ui.a2a import A2A
+        from fastapi import FastAPI
+        import uvicorn
+    except ImportError as e:
+        print(f"Error: Missing dependency - {e}")
+        print("Install with: pip install 'praisonaiagents[api]'")
+        sys.exit(1)
+    
+    # Create agent
+    agent = Agent(
+        name="A2A-Assistant",
+        role="Helpful AI Assistant",
+        goal="Help other agents and users with their questions",
+        backstory="You are a knowledgeable assistant accessible via A2A protocol.",
+        llm="gpt-4o-mini"
+    )
+    
+    # Create A2A interface
+    a2a = A2A(
+        agent=agent,
+        url="http://localhost:8082/a2a",
+        name="A2A-Assistant",
+        description="A helpful AI assistant accessible via A2A protocol"
+    )
+    
+    # Create FastAPI app
+    app = FastAPI(title="PraisonAI A2A Server")
+    app.include_router(a2a.get_router())
+    
+    # Add discovery endpoint
+    @app.get("/__praisonai__/discovery")
+    async def discovery():
+        return {
+            "schema_version": "1.0.0",
+            "server_name": "praisonai-a2a",
+            "providers": [{"type": "a2a", "name": "A2A Protocol", "capabilities": ["agent-card", "message-send"]}],
+            "endpoints": [{"name": "a2a", "provider_type": "a2a", "streaming": ["sse"]}]
+        }
+    
+    @app.get("/")
+    async def root():
+        return {
+            "message": "PraisonAI A2A Server",
+            "agent_card": "/.well-known/agent.json",
+            "a2a_endpoint": "/a2a",
+            "discovery": "/__praisonai__/discovery"
+        }
+    
+    print("Starting A2A server on http://localhost:8082")
+    print("Agent Card: http://localhost:8082/.well-known/agent.json")
+    print("A2A Endpoint: http://localhost:8082/a2a")
+    
+    uvicorn.run(app, host="127.0.0.1", port=8082, log_level="warning")
+
+
+def run_client():
+    """Run A2A client test."""
+    import urllib.request
+    import urllib.error
+    
+    base_url = "http://localhost:8082"
+    
+    print("\n--- A2A Client Test ---")
+    
+    # 1. Get agent card
+    print("\n1. Getting Agent Card...")
+    try:
+        req = urllib.request.Request(f"{base_url}/.well-known/agent.json")
+        with urllib.request.urlopen(req, timeout=5) as resp:
+            agent_card = json.loads(resp.read().decode())
+            print(f"   Agent: {agent_card.get('name')}")
+            print(f"   URL: {agent_card.get('url')}")
+            print(f"   Capabilities: {agent_card.get('capabilities', {})}")
+    except Exception as e:
+        print(f"   Error: {e}")
+        return
+    
+    # 2. Send A2A message
+    print("\n2. Sending A2A Message...")
+    message = {
+        "jsonrpc": "2.0",
+        "method": "message/send",
+        "id": "test-1",
+        "params": {
+            "message": {
+                "role": "user",
+                "parts": [{"type": "text", "text": "Hello! What can you help me with?"}]
+            }
+        }
+    }
+    
+    try:
+        req = urllib.request.Request(
+            f"{base_url}/a2a",
+            data=json.dumps(message).encode(),
+            headers={"Content-Type": "application/json"},
+            method="POST"
+        )
+        with urllib.request.urlopen(req, timeout=30) as resp:
+            response = json.loads(resp.read().decode())
+            if "result" in response:
+                result_msg = response["result"].get("message", {})
+                parts = result_msg.get("parts", [])
+                for part in parts:
+                    if part.get("type") == "text":
+                        print(f"   Response: {part.get('text', '')[:200]}...")
+            elif "error" in response:
+                print(f"   Error: {response['error']}")
+    except Exception as e:
+        print(f"   Error: {e}")
+    
+    # 3. Check discovery
+    print("\n3. Checking Discovery...")
+    try:
+        req = urllib.request.Request(f"{base_url}/__praisonai__/discovery")
+        with urllib.request.urlopen(req, timeout=5) as resp:
+            discovery = json.loads(resp.read().decode())
+            print(f"   Server: {discovery.get('server_name')}")
+            print(f"   Providers: {[p.get('type') for p in discovery.get('providers', [])]}")
+    except Exception as e:
+        print(f"   Error: {e}")
+    
+    print("\n✓ A2A client test completed!")
+
+
+def main():
+    print("=" * 60)
+    print("A2A (Agent-to-Agent) Server and Client Example")
+    print("=" * 60)
+    
+    mode = sys.argv[1] if len(sys.argv) > 1 else "server"
+    
+    if mode == "client":
+        run_client()
+    elif mode == "test":
+        # Start server in background, run client, then stop
+        print("Starting server in background...")
+        server_thread = threading.Thread(target=run_server, daemon=True)
+        server_thread.start()
+        time.sleep(3)  # Wait for server to start
+        run_client()
+    else:
+        print("\nStarting A2A server...")
+        print("Press Ctrl+C to stop")
+        print("\nTo test, run in another terminal:")
+        print("  python a2a_server_client.py client")
+        run_server()
+
+
+if __name__ == "__main__":
+    main()

examples/serve/a2u_events_stream.py

@@ -0,0 +1,189 @@
+#!/usr/bin/env python3
+"""
+A2U (Agent-to-User) Event Stream Example
+
+Demonstrates:
+- Launching an A2U event stream server
+- Subscribing to agent events
+- SSE (Server-Sent Events) streaming
+- Event filtering
+
+Usage:
+    # Run this example (starts server)
+    python a2u_events_stream.py
+    
+    # Or use CLI:
+    praisonai serve a2u --port 8083
+    
+    # Test with curl:
+    curl http://localhost:8083/a2u/info
+    curl -N http://localhost:8083/a2u/events/events
+"""
+
+import os
+import sys
+import json
+import threading
+import time
+
+if not os.environ.get("OPENAI_API_KEY"):
+    print("Error: OPENAI_API_KEY environment variable not set")
+    sys.exit(1)
+
+
+def run_server():
+    """Run A2U server."""
+    try:
+        from fastapi import FastAPI
+        import uvicorn
+        from praisonai.endpoints.a2u_server import (
+            create_a2u_routes,
+            emit_agent_started,
+            emit_agent_thinking,
+            emit_agent_response,
+            emit_agent_completed,
+        )
+    except ImportError as e:
+        print(f"Error: Missing dependency - {e}")
+        print("Install with: pip install praisonai[serve]")
+        sys.exit(1)
+    
+    app = FastAPI(title="PraisonAI A2U Server")
+    
+    # Add A2U routes
+    create_a2u_routes(app)
+    
+    # Add discovery endpoint
+    @app.get("/__praisonai__/discovery")
+    async def discovery():
+        return {
+            "schema_version": "1.0.0",
+            "server_name": "praisonai-a2u",
+            "providers": [{"type": "a2u", "name": "A2U Event Stream", "capabilities": ["subscribe", "stream"]}],
+            "endpoints": [{"name": "events", "provider_type": "a2u", "streaming": ["sse"]}]
+        }
+    
+    @app.get("/")
+    async def root():
+        return {
+            "message": "PraisonAI A2U Server",
+            "info": "/a2u/info",
+            "events": "/a2u/events/<stream>",
+            "discovery": "/__praisonai__/discovery"
+        }
+    
+    # Demo endpoint to emit events
+    @app.post("/demo/emit")
+    async def demo_emit():
+        """Emit demo events for testing."""
+        agent_id = "demo-agent-1"
+        emit_agent_started(agent_id, "DemoAgent")
+        emit_agent_thinking(agent_id, "Processing your request...")
+        emit_agent_response(agent_id, "Here is my response to your query.")
+        emit_agent_completed(agent_id, {"status": "success"})
+        return {"message": "Demo events emitted", "agent_id": agent_id}
+    
+    print("Starting A2U server on http://localhost:8083")
+    print("Info: http://localhost:8083/a2u/info")
+    print("Events: http://localhost:8083/a2u/events/events")
+    print("Demo: POST http://localhost:8083/demo/emit")
+    
+    uvicorn.run(app, host="127.0.0.1", port=8083, log_level="warning")
+
+
+def run_client():
+    """Run A2U client test."""
+    import urllib.request
+    import urllib.error
+    
+    base_url = "http://localhost:8083"
+    
+    print("\n--- A2U Client Test ---")
+    
+    # 1. Get A2U info
+    print("\n1. Getting A2U Info...")
+    try:
+        req = urllib.request.Request(f"{base_url}/a2u/info")
+        with urllib.request.urlopen(req, timeout=5) as resp:
+            info = json.loads(resp.read().decode())
+            print(f"   Name: {info.get('name')}")
+            print(f"   Version: {info.get('version')}")
+            print(f"   Streams: {info.get('streams')}")
+            print(f"   Event Types: {info.get('event_types')}")
+    except Exception as e:
+        print(f"   Error: {e}")
+        return
+    
+    # 2. Subscribe to events
+    print("\n2. Subscribing to Events...")
+    try:
+        req = urllib.request.Request(
+            f"{base_url}/a2u/subscribe",
+            data=json.dumps({"stream": "events", "filters": []}).encode(),
+            headers={"Content-Type": "application/json"},
+            method="POST"
+        )
+        with urllib.request.urlopen(req, timeout=5) as resp:
+            sub = json.loads(resp.read().decode())
+            print(f"   Subscription ID: {sub.get('subscription_id')}")
+            print(f"   Stream URL: {sub.get('stream_url')}")
+    except Exception as e:
+        print(f"   Error: {e}")
+    
+    # 3. Emit demo events
+    print("\n3. Emitting Demo Events...")
+    try:
+        req = urllib.request.Request(
+            f"{base_url}/demo/emit",
+            data=b"{}",
+            headers={"Content-Type": "application/json"},
+            method="POST"
+        )
+        with urllib.request.urlopen(req, timeout=5) as resp:
+            result = json.loads(resp.read().decode())
+            print(f"   {result.get('message')}")
+            print(f"   Agent ID: {result.get('agent_id')}")
+    except Exception as e:
+        print(f"   Error: {e}")
+    
+    # 4. Check discovery
+    print("\n4. Checking Discovery...")
+    try:
+        req = urllib.request.Request(f"{base_url}/__praisonai__/discovery")
+        with urllib.request.urlopen(req, timeout=5) as resp:
+            discovery = json.loads(resp.read().decode())
+            print(f"   Server: {discovery.get('server_name')}")
+            print(f"   Providers: {[p.get('type') for p in discovery.get('providers', [])]}")
+    except Exception as e:
+        print(f"   Error: {e}")
+    
+    print("\n✓ A2U client test completed!")
+    print("\nTo stream events, run:")
+    print(f"  curl -N {base_url}/a2u/events/events")
+
+
+def main():
+    print("=" * 60)
+    print("A2U (Agent-to-User) Event Stream Example")
+    print("=" * 60)
+    
+    mode = sys.argv[1] if len(sys.argv) > 1 else "server"
+    
+    if mode == "client":
+        run_client()
+    elif mode == "test":
+        print("Starting server in background...")
+        server_thread = threading.Thread(target=run_server, daemon=True)
+        server_thread.start()
+        time.sleep(2)
+        run_client()
+    else:
+        print("\nStarting A2U server...")
+        print("Press Ctrl+C to stop")
+        print("\nTo test, run in another terminal:")
+        print("  python a2u_events_stream.py client")
+        run_server()
+
+
+if __name__ == "__main__":
+    main()

examples/serve/agent_as_api_single.py

@@ -0,0 +1,132 @@
+#!/usr/bin/env python3
+"""
+Single Agent as HTTP API Example
+
+Demonstrates launching a single agent as an HTTP API server with:
+- REST endpoint for queries
+- Streaming support (SSE)
+- Discovery endpoint
+- Health check
+
+Usage:
+    # Run this example
+    python agent_as_api_single.py
+    
+    # Or use CLI:
+    praisonai serve agents --file agents.yaml --port 8000
+    
+    # Test with curl:
+    curl -X POST http://localhost:8000/agent \
+      -H "Content-Type: application/json" \
+      -d '{"query": "What is AI?"}'
+"""
+
+import os
+import sys
+
+# Ensure API key is set
+if not os.environ.get("OPENAI_API_KEY"):
+    print("Error: OPENAI_API_KEY environment variable not set")
+    sys.exit(1)
+
+
+def main():
+    print("=" * 60)
+    print("Single Agent as HTTP API Example")
+    print("=" * 60)
+    
+    try:
+        from praisonaiagents import Agent
+    except ImportError:
+        print("Error: praisonaiagents not installed")
+        print("Install with: pip install praisonaiagents")
+        sys.exit(1)
+    
+    # Create a single agent
+    agent = Agent(
+        name="Assistant",
+        role="Helpful AI Assistant",
+        goal="Help users with their questions accurately and concisely",
+        backstory="You are a knowledgeable assistant who provides clear, helpful answers.",
+        llm="gpt-4o-mini",
+        verbose=True
+    )
+    
+    print(f"Agent: {agent.name}")
+    print(f"Role: {agent.role}")
+    
+    # Launch as HTTP API
+    print("\nLaunching agent as HTTP API...")
+    print("Endpoints:")
+    print("  POST /agent - Query the agent")
+    print("  GET  /health - Health check")
+    print("  GET  /__praisonai__/discovery - Discovery document")
+    print("\nPress Ctrl+C to stop")
+    
+    try:
+        # Use Agent.launch() to start HTTP server
+        agent.launch(
+            port=8000,
+            host="127.0.0.1",
+            path="/agent"
+        )
+    except KeyboardInterrupt:
+        print("\nServer stopped")
+    except Exception as e:
+        print(f"Error launching server: {e}")
+        # Fallback: manual FastAPI setup
+        print("\nFallback: Using manual FastAPI setup...")
+        launch_manual(agent)
+
+
+def launch_manual(agent):
+    """Manual FastAPI server setup as fallback."""
+    try:
+        from fastapi import FastAPI, Request
+        from fastapi.responses import JSONResponse
+        import uvicorn
+    except ImportError:
+        print("Error: FastAPI/uvicorn not installed")
+        print("Install with: pip install fastapi uvicorn")
+        return
+    
+    app = FastAPI(title="PraisonAI Agent API")
+    
+    @app.post("/agent")
+    async def query_agent(request: Request):
+        try:
+            body = await request.json()
+            query = body.get("query", "")
+            if not query:
+                return JSONResponse({"error": "query required"}, status_code=400)
+            
+            response = agent.chat(query)
+            return {"response": response}
+        except Exception as e:
+            return JSONResponse({"error": str(e)}, status_code=500)
+    
+    @app.get("/health")
+    async def health():
+        return {"status": "healthy", "agent": agent.name}
+    
+    @app.get("/__praisonai__/discovery")
+    async def discovery():
+        return {
+            "schema_version": "1.0.0",
+            "server_name": "praisonai-agent",
+            "providers": [{"type": "agents-api", "name": "Single Agent API"}],
+            "endpoints": [{"name": "agent", "provider_type": "agents-api"}]
+        }
+    
+    @app.get("/")
+    async def root():
+        return {
+            "message": f"PraisonAI Agent: {agent.name}",
+            "endpoints": ["/agent", "/health", "/__praisonai__/discovery"]
+        }
+    
+    uvicorn.run(app, host="127.0.0.1", port=8000)
+
+
+if __name__ == "__main__":
+    main()

examples/serve/agent_launch_modes.py

@@ -0,0 +1,220 @@
+#!/usr/bin/env python3
+"""
+Agent.launch() and Agents.launch() Example
+
+Demonstrates the high-level Python API for launching servers:
+- Agent.launch() for single agent
+- Agents.launch() for multi-agent
+- Different server modes (HTTP, MCP, A2A)
+
+Usage:
+    # Run this example
+    python agent_launch_modes.py
+    
+    # Test endpoints:
+    curl http://localhost:8000/agent
+    curl http://localhost:8000/health
+"""
+
+import os
+import sys
+
+if not os.environ.get("OPENAI_API_KEY"):
+    print("Error: OPENAI_API_KEY environment variable not set")
+    sys.exit(1)
+
+
+def demo_single_agent_launch():
+    """Demo Agent.launch() for single agent."""
+    print("\n--- Single Agent Launch ---")
+    
+    try:
+        from praisonaiagents import Agent
+    except ImportError:
+        print("Error: praisonaiagents not installed")
+        return False
+    
+    agent = Agent(
+        name="Assistant",
+        role="Helpful AI Assistant",
+        goal="Help users with their questions",
+        llm="gpt-4o-mini"
+    )
+    
+    print(f"Agent: {agent.name}")
+    print("Launching as HTTP API on port 8000...")
+    print("\nEndpoints:")
+    print("  POST /agent - Query the agent")
+    print("  GET  /health - Health check")
+    print("\nPress Ctrl+C to stop")
+    
+    try:
+        agent.launch(port=8000, host="127.0.0.1", path="/agent")
+    except AttributeError:
+        print("Agent.launch() not available, using fallback...")
+        launch_single_fallback(agent)
+    except KeyboardInterrupt:
+        print("\nStopped")
+    
+    return True
+
+
+def demo_multi_agent_launch():
+    """Demo Agents.launch() for multi-agent."""
+    print("\n--- Multi-Agent Launch ---")
+    
+    try:
+        from praisonaiagents import Agent, PraisonAIAgents
+    except ImportError:
+        print("Error: praisonaiagents not installed")
+        return False
+    
+    researcher = Agent(
+        name="Researcher",
+        role="Research Specialist",
+        goal="Find accurate information",
+        llm="gpt-4o-mini"
+    )
+    
+    writer = Agent(
+        name="Writer",
+        role="Content Writer",
+        goal="Create engaging content",
+        llm="gpt-4o-mini"
+    )
+    
+    agents = PraisonAIAgents(agents=[researcher, writer])
+    
+    print(f"Agents: {[researcher.name, writer.name]}")
+    print("Launching as HTTP API on port 8000...")
+    print("\nEndpoints:")
+    print("  POST /agents - Route to best agent")
+    print("  POST /agents/researcher - Query researcher")
+    print("  POST /agents/writer - Query writer")
+    print("  GET  /agents/list - List agents")
+    print("\nPress Ctrl+C to stop")
+    
+    try:
+        agents.launch(port=8000, host="127.0.0.1")
+    except AttributeError:
+        print("Agents.launch() not available, using fallback...")
+        launch_multi_fallback([researcher, writer])
+    except KeyboardInterrupt:
+        print("\nStopped")
+    
+    return True
+
+
+def launch_single_fallback(agent):
+    """Fallback implementation for Agent.launch()."""
+    try:
+        from fastapi import FastAPI, Request
+        from fastapi.responses import JSONResponse
+        import uvicorn
+    except ImportError:
+        print("Error: FastAPI/uvicorn not installed")
+        return
+    
+    app = FastAPI(title=f"PraisonAI Agent: {agent.name}")
+    
+    @app.post("/agent")
+    async def query(request: Request):
+        try:
+            body = await request.json()
+            query_text = body.get("query", "")
+            response = agent.chat(query_text)
+            return {"response": response}
+        except Exception as e:
+            return JSONResponse({"error": str(e)}, status_code=500)
+    
+    @app.get("/health")
+    async def health():
+        return {"status": "healthy", "agent": agent.name}
+    
+    @app.get("/__praisonai__/discovery")
+    async def discovery():
+        return {
+            "schema_version": "1.0.0",
+            "server_name": f"praisonai-{agent.name.lower()}",
+            "providers": [{"type": "agents-api", "name": "Single Agent API"}],
+            "endpoints": [{"name": "agent", "provider_type": "agents-api"}]
+        }
+    
+    uvicorn.run(app, host="127.0.0.1", port=8000)
+
+
+def launch_multi_fallback(agents):
+    """Fallback implementation for Agents.launch()."""
+    try:
+        from fastapi import FastAPI, Request
+        from fastapi.responses import JSONResponse
+        import uvicorn
+    except ImportError:
+        print("Error: FastAPI/uvicorn not installed")
+        return
+    
+    app = FastAPI(title="PraisonAI Multi-Agent API")
+    agent_map = {a.name.lower(): a for a in agents}
+    
+    @app.post("/agents")
+    async def route(request: Request):
+        try:
+            body = await request.json()
+            query_text = body.get("query", "")
+            # Simple routing
+            agent = agents[0]
+            response = agent.chat(query_text)
+            return {"agent": agent.name, "response": response}
+        except Exception as e:
+            return JSONResponse({"error": str(e)}, status_code=500)
+    
+    @app.post("/agents/{name}")
+    async def query_agent(name: str, request: Request):
+        agent = agent_map.get(name.lower())
+        if not agent:
+            return JSONResponse({"error": f"Agent not found: {name}"}, status_code=404)
+        try:
+            body = await request.json()
+            response = agent.chat(body.get("query", ""))
+            return {"agent": agent.name, "response": response}
+        except Exception as e:
+            return JSONResponse({"error": str(e)}, status_code=500)
+    
+    @app.get("/agents/list")
+    async def list_agents():
+        return {"agents": [{"name": a.name, "role": a.role} for a in agents]}
+    
+    @app.get("/health")
+    async def health():
+        return {"status": "healthy", "agents": len(agents)}
+    
+    @app.get("/__praisonai__/discovery")
+    async def discovery():
+        return {
+            "schema_version": "1.0.0",
+            "server_name": "praisonai-agents",
+            "providers": [{"type": "agents-api", "name": "Multi-Agent API"}],
+            "endpoints": [
+                {"name": "agents", "provider_type": "agents-api"},
+                *[{"name": f"agents/{a.name.lower()}", "provider_type": "agents-api"} for a in agents]
+            ]
+        }
+    
+    uvicorn.run(app, host="127.0.0.1", port=8000)
+
+
+def main():
+    print("=" * 60)
+    print("Agent.launch() and Agents.launch() Example")
+    print("=" * 60)
+    
+    mode = sys.argv[1] if len(sys.argv) > 1 else "single"
+    
+    if mode == "multi":
+        demo_multi_agent_launch()
+    else:
+        demo_single_agent_launch()
+
+
+if __name__ == "__main__":
+    main()

examples/serve/agents_as_api_router.py

@@ -0,0 +1,189 @@
+#!/usr/bin/env python3
+"""
+Multi-Agent Router as HTTP API Example
+
+Demonstrates launching multiple agents as an HTTP API with:
+- Router endpoint for automatic agent selection
+- Per-agent endpoints
+- Streaming support (SSE)
+- Discovery endpoint
+
+Usage:
+    # Run this example
+    python agents_as_api_router.py
+    
+    # Or use CLI:
+    praisonai serve agents --file agents.yaml --port 8000
+    
+    # Test with curl:
+    curl -X POST http://localhost:8000/agents \
+      -H "Content-Type: application/json" \
+      -d '{"query": "Research AI trends"}'
+"""
+
+import os
+import sys
+
+if not os.environ.get("OPENAI_API_KEY"):
+    print("Error: OPENAI_API_KEY environment variable not set")
+    sys.exit(1)
+
+
+def main():
+    print("=" * 60)
+    print("Multi-Agent Router as HTTP API Example")
+    print("=" * 60)
+    
+    try:
+        from praisonaiagents import Agent, PraisonAIAgents
+    except ImportError:
+        print("Error: praisonaiagents not installed")
+        print("Install with: pip install praisonaiagents")
+        sys.exit(1)
+    
+    # Create multiple agents
+    researcher = Agent(
+        name="Researcher",
+        role="Research Specialist",
+        goal="Find accurate and relevant information",
+        backstory="Expert at finding and synthesizing information from various sources.",
+        llm="gpt-4o-mini"
+    )
+    
+    writer = Agent(
+        name="Writer",
+        role="Content Writer",
+        goal="Create engaging content from research",
+        backstory="Skilled writer who transforms research into readable content.",
+        llm="gpt-4o-mini"
+    )
+    
+    analyst = Agent(
+        name="Analyst",
+        role="Data Analyst",
+        goal="Analyze data and provide insights",
+        backstory="Expert at analyzing data and extracting meaningful insights.",
+        llm="gpt-4o-mini"
+    )
+    
+    agents = [researcher, writer, analyst]
+    
+    print(f"Agents: {[a.name for a in agents]}")
+    
+    # Create multi-agent system
+    praison = PraisonAIAgents(agents=agents)
+    
+    print("\nLaunching multi-agent router as HTTP API...")
+    print("Endpoints:")
+    print("  POST /agents - Route to best agent")
+    print("  POST /agents/researcher - Query researcher")
+    print("  POST /agents/writer - Query writer")
+    print("  POST /agents/analyst - Query analyst")
+    print("  GET  /agents/list - List all agents")
+    print("  GET  /health - Health check")
+    print("  GET  /__praisonai__/discovery - Discovery document")
+    print("\nPress Ctrl+C to stop")
+    
+    try:
+        # Use Agents.launch() to start HTTP server
+        praison.launch(
+            port=8000,
+            host="127.0.0.1"
+        )
+    except KeyboardInterrupt:
+        print("\nServer stopped")
+    except Exception as e:
+        print(f"Error launching server: {e}")
+        print("\nFallback: Using manual FastAPI setup...")
+        launch_manual(agents)
+
+
+def launch_manual(agents):
+    """Manual FastAPI server setup as fallback."""
+    try:
+        from fastapi import FastAPI, Request
+        from fastapi.responses import JSONResponse
+        import uvicorn
+    except ImportError:
+        print("Error: FastAPI/uvicorn not installed")
+        print("Install with: pip install fastapi uvicorn")
+        return
+    
+    app = FastAPI(title="PraisonAI Multi-Agent API")
+    
+    # Create agent lookup
+    agent_map = {a.name.lower(): a for a in agents}
+    
+    @app.post("/agents")
+    async def route_query(request: Request):
+        """Route query to best agent."""
+        try:
+            body = await request.json()
+            query = body.get("query", "")
+            if not query:
+                return JSONResponse({"error": "query required"}, status_code=400)
+            
+            # Simple routing based on keywords
+            query_lower = query.lower()
+            if any(w in query_lower for w in ["research", "find", "search"]):
+                agent = agent_map.get("researcher", agents[0])
+            elif any(w in query_lower for w in ["write", "create", "draft"]):
+                agent = agent_map.get("writer", agents[0])
+            elif any(w in query_lower for w in ["analyze", "data", "insight"]):
+                agent = agent_map.get("analyst", agents[0])
+            else:
+                agent = agents[0]
+            
+            response = agent.chat(query)
+            return {"agent": agent.name, "response": response}
+        except Exception as e:
+            return JSONResponse({"error": str(e)}, status_code=500)
+    
+    @app.post("/agents/{agent_name}")
+    async def query_agent(agent_name: str, request: Request):
+        """Query specific agent."""
+        agent = agent_map.get(agent_name.lower())
+        if not agent:
+            return JSONResponse({"error": f"Agent not found: {agent_name}"}, status_code=404)
+        
+        try:
+            body = await request.json()
+            query = body.get("query", "")
+            response = agent.chat(query)
+            return {"agent": agent.name, "response": response}
+        except Exception as e:
+            return JSONResponse({"error": str(e)}, status_code=500)
+    
+    @app.get("/agents/list")
+    async def list_agents():
+        return {"agents": [{"name": a.name, "role": a.role} for a in agents]}
+    
+    @app.get("/health")
+    async def health():
+        return {"status": "healthy", "agents": len(agents)}
+    
+    @app.get("/__praisonai__/discovery")
+    async def discovery():
+        return {
+            "schema_version": "1.0.0",
+            "server_name": "praisonai-agents-router",
+            "providers": [{"type": "agents-api", "name": "Multi-Agent Router"}],
+            "endpoints": [
+                {"name": "agents", "provider_type": "agents-api"},
+                *[{"name": f"agents/{a.name.lower()}", "provider_type": "agents-api"} for a in agents]
+            ]
+        }
+    
+    @app.get("/")
+    async def root():
+        return {
+            "message": "PraisonAI Multi-Agent Router",
+            "agents": [a.name for a in agents],
+            "endpoints": ["/agents", "/agents/list", "/health"]
+        }
+    
+    uvicorn.run(app, host="127.0.0.1", port=8000)
+
+
+if __name__ == "__main__":
+    main()

examples/serve/endpoints_unified_client.py

@@ -0,0 +1,116 @@
+#!/usr/bin/env python3
+"""
+Unified Endpoints Client Example
+
+Demonstrates using the praisonai endpoints CLI to interact with any PraisonAI server.
+Works with recipe, agents-api, mcp, a2a, a2u, and tools-mcp servers.
+
+Usage:
+    # Start any server first (e.g., unified server)
+    praisonai serve unified --port 8765
+    
+    # Then run this example
+    python endpoints_unified_client.py
+    
+    # Or use CLI directly:
+    praisonai endpoints list
+    praisonai endpoints types
+    praisonai endpoints health
+    praisonai endpoints discovery
+"""
+
+import json
+import os
+import subprocess
+import sys
+
+
+def run_cli(args: list) -> tuple:
+    """Run praisonai endpoints CLI command."""
+    cmd = ["python3", "-m", "praisonai.cli.main", "endpoints"] + args
+    result = subprocess.run(cmd, capture_output=True, text=True)
+    return result.returncode, result.stdout, result.stderr
+
+
+def main():
+    print("=" * 60)
+    print("PraisonAI Unified Endpoints Client Example")
+    print("=" * 60)
+    
+    server_url = os.environ.get("PRAISONAI_ENDPOINTS_URL", "http://localhost:8765")
+    print(f"Server URL: {server_url}")
+    
+    # 1. List provider types
+    print("\n--- Provider Types ---")
+    code, out, err = run_cli(["types", "--format", "json"])
+    if code == 0:
+        types = json.loads(out)
+        print(f"Supported types: {[t['type'] for t in types]}")
+    else:
+        print(f"Error: {err}")
+    
+    # 2. Health check
+    print("\n--- Health Check ---")
+    code, out, err = run_cli(["health", "--url", server_url])
+    if code == 0:
+        print("✓ Server is healthy")
+        print(out.strip())
+    elif code == 8:
+        print("✗ Connection error - server not running")
+        print("\nStart a server first:")
+        print("  praisonai serve unified --port 8765")
+        print("  praisonai serve agents --file agents.yaml --port 8765")
+        print("  praisonai serve a2a --port 8765")
+        return 1
+    else:
+        print(f"✗ Health check failed: {err}")
+        return 1
+    
+    # 3. Discovery document
+    print("\n--- Discovery Document ---")
+    code, out, err = run_cli(["discovery", "--url", server_url])
+    if code == 0:
+        try:
+            discovery = json.loads(out)
+            print(f"Server: {discovery.get('server_name', 'unknown')}")
+            print(f"Schema version: {discovery.get('schema_version', 'unknown')}")
+            providers = discovery.get('providers', [])
+            print(f"Providers: {[p.get('type') for p in providers]}")
+            endpoints = discovery.get('endpoints', [])
+            print(f"Endpoints: {[e.get('name') for e in endpoints]}")
+        except json.JSONDecodeError:
+            print(out.strip())
+    else:
+        print(f"Discovery not available: {err}")
+    
+    # 4. List endpoints
+    print("\n--- List Endpoints ---")
+    code, out, err = run_cli(["list", "--url", server_url, "--format", "json"])
+    if code == 0:
+        try:
+            endpoints = json.loads(out)
+            if isinstance(endpoints, list):
+                for ep in endpoints[:5]:  # Show first 5
+                    print(f"  - {ep.get('name')}: {ep.get('description', '')[:50]}")
+            else:
+                print(out.strip()[:200])
+        except json.JSONDecodeError:
+            print(out.strip()[:200])
+    else:
+        print(f"List failed: {err}")
+    
+    # 5. Filter by type
+    print("\n--- Filter by Provider Type ---")
+    for ptype in ["agents-api", "a2a", "recipe"]:
+        code, out, err = run_cli(["list", "--url", server_url, "--type", ptype])
+        if code == 0 and out.strip():
+            print(f"  {ptype}: {len(out.strip().split(chr(10)))} endpoints")
+    
+    print("\n" + "=" * 60)
+    print("Example completed successfully!")
+    print("=" * 60)
+    return 0
+
+
+if __name__ == "__main__":
+    sys.exit(main())

examples/serve/mcp_http_server.py

@@ -0,0 +1,138 @@
+#!/usr/bin/env python3
+"""
+MCP HTTP Server Example
+
+Demonstrates launching an MCP server with HTTP transport:
+- HTTP-based MCP protocol
+- Tool registration
+- Discovery endpoint
+
+Usage:
+    # Run this example
+    python mcp_http_server.py
+    
+    # Or use CLI:
+    praisonai serve mcp --transport http --port 8080
+    
+    # Test with curl:
+    curl http://localhost:8080/mcp/tools
+    curl -X POST http://localhost:8080/mcp/tools/call \
+      -H "Content-Type: application/json" \
+      -d '{"tool": "search", "arguments": {"query": "AI news"}}'
+"""
+
+import sys
+
+
+def main():
+    print("=" * 60)
+    print("MCP HTTP Server Example")
+    print("=" * 60)
+    
+    try:
+        from fastapi import FastAPI
+        import uvicorn
+    except ImportError:
+        print("Error: FastAPI/uvicorn not installed")
+        print("Install with: pip install fastapi uvicorn")
+        sys.exit(1)
+    
+    # Define tools
+    def search(query: str) -> str:
+        """Search the web for information."""
+        return f"Search results for: {query}"
+    
+    def calculate(expression: str) -> str:
+        """Calculate a math expression safely."""
+        try:
+            # Safe eval for basic math
+            allowed = set("0123456789+-*/.() ")
+            if all(c in allowed for c in expression):
+                return str(eval(expression))
+            return "Error: Invalid expression"
+        except Exception as e:
+            return f"Error: {e}"
+    
+    def get_weather(city: str) -> str:
+        """Get weather for a city (mock)."""
+        return f"Weather in {city}: Sunny, 72°F"
+    
+    tools = {
+        "search": {"func": search, "description": "Search the web for information"},
+        "calculate": {"func": calculate, "description": "Calculate a math expression"},
+        "get_weather": {"func": get_weather, "description": "Get weather for a city"},
+    }
+    
+    app = FastAPI(title="PraisonAI MCP Server")
+    
+    @app.get("/mcp/tools")
+    async def list_tools():
+        """List available MCP tools."""
+        return {
+            "tools": [
+                {
+                    "name": name,
+                    "description": info["description"],
+                    "inputSchema": {
+                        "type": "object",
+                        "properties": {
+                            list(info["func"].__code__.co_varnames)[0]: {"type": "string"}
+                        },
+                        "required": [list(info["func"].__code__.co_varnames)[0]]
+                    }
+                }
+                for name, info in tools.items()
+            ]
+        }
+    
+    @app.post("/mcp/tools/call")
+    async def call_tool(request: dict):
+        """Call an MCP tool."""
+        tool_name = request.get("tool")
+        arguments = request.get("arguments", {})
+        
+        if tool_name not in tools:
+            return {"error": f"Tool not found: {tool_name}"}
+        
+        try:
+            func = tools[tool_name]["func"]
+            # Get first argument
+            arg_name = list(func.__code__.co_varnames)[0]
+            arg_value = arguments.get(arg_name, "")
+            result = func(arg_value)
+            return {"result": result, "tool": tool_name}
+        except Exception as e:
+            return {"error": str(e)}
+    
+    @app.get("/__praisonai__/discovery")
+    async def discovery():
+        return {
+            "schema_version": "1.0.0",
+            "server_name": "praisonai-mcp",
+            "providers": [{"type": "mcp", "name": "MCP Server", "capabilities": ["list-tools", "call-tool"]}],
+            "endpoints": [{"name": "mcp", "provider_type": "mcp"}]
+        }
+    
+    @app.get("/health")
+    async def health():
+        return {"status": "healthy", "tools": len(tools)}
+    
+    @app.get("/")
+    async def root():
+        return {
+            "message": "PraisonAI MCP Server (HTTP)",
+            "tools": list(tools.keys()),
+            "endpoints": ["/mcp/tools", "/mcp/tools/call", "/health"]
+        }
+    
+    print(f"Tools: {list(tools.keys())}")
+    print("\nStarting MCP HTTP server on http://localhost:8080")
+    print("List tools: GET http://localhost:8080/mcp/tools")
+    print("Call tool: POST http://localhost:8080/mcp/tools/call")
+    print("\nPress Ctrl+C to stop")
+    
+    uvicorn.run(app, host="127.0.0.1", port=8080)
+
+
+if __name__ == "__main__":
+    main()

examples/serve/recipe_serve_features.py

@@ -0,0 +1,350 @@
+#!/usr/bin/env python3
+"""
+PraisonAI Recipe Server Advanced Features Example
+
+Demonstrates:
+1. Rate limiting
+2. Request size limits
+3. Metrics endpoint
+4. Admin reload endpoint
+5. OpenAPI specification
+6. Workers configuration
+7. OpenTelemetry tracing
+
+Prerequisites:
+- pip install praisonai[serve]
+- Set OPENAI_API_KEY environment variable
+
+Usage:
+    # Run this example
+    python recipe_serve_features.py
+"""
+
+import json
+import os
+import urllib.request
+import urllib.error
+
+# Configuration
+SERVER_URL = os.environ.get("PRAISONAI_ENDPOINTS_URL", "http://localhost:8765")
+API_KEY = os.environ.get("PRAISONAI_API_KEY", "test-api-key")
+
+
+def make_request(method: str, path: str, data: dict = None, headers: dict = None) -> dict:
+    """Make HTTP request to server."""
+    url = f"{SERVER_URL}{path}"
+    default_headers = {
+        "Content-Type": "application/json",
+        "X-API-Key": API_KEY,
+    }
+    if headers:
+        default_headers.update(headers)
+    
+    body = json.dumps(data).encode() if data else None
+    
+    try:
+        req = urllib.request.Request(url, data=body, headers=default_headers, method=method)
+        with urllib.request.urlopen(req, timeout=30) as response:
+            return {
+                "status": response.status,
+                "data": json.loads(response.read().decode()),
+                "headers": dict(response.headers)
+            }
+    except urllib.error.HTTPError as e:
+        body = e.read().decode() if e.fp else ""
+        try:
+            error_data = json.loads(body)
+        except json.JSONDecodeError:
+            error_data = {"raw": body}
+        return {
+            "status": e.code,
+            "error": error_data,
+            "headers": dict(e.headers) if hasattr(e, 'headers') else {}
+        }
+    except urllib.error.URLError as e:
+        return {"status": 0, "error": str(e.reason)}
+
+
+def test_health():
+    """Test health endpoint."""
+    print("\n" + "=" * 60)
+    print("TEST: Health Check")
+    print("=" * 60)
+    
+    result = make_request("GET", "/health")
+    
+    if result.get("status") == 200:
+        data = result["data"]
+        print("✓ Server healthy")
+        print(f"  Service: {data.get('service')}")
+        print(f"  Version: {data.get('version')}")
+        return True
+    else:
+        print(f"✗ Server unhealthy: {result.get('error')}")
+        return False
+
+
+def test_openapi():
+    """Test OpenAPI specification endpoint."""
+    print("\n" + "=" * 60)
+    print("TEST: OpenAPI Specification")
+    print("=" * 60)
+    
+    result = make_request("GET", "/openapi.json")
+    
+    if result.get("status") == 200:
+        spec = result["data"]
+        print("✓ OpenAPI spec available")
+        print(f"  Version: {spec.get('openapi')}")
+        print(f"  Title: {spec.get('info', {}).get('title')}")
+        print(f"  Paths: {list(spec.get('paths', {}).keys())[:5]}...")
+        return True
+    else:
+        print(f"✗ OpenAPI not available: {result.get('error')}")
+        return False
+
+
+def test_metrics():
+    """Test metrics endpoint."""
+    print("\n" + "=" * 60)
+    print("TEST: Metrics Endpoint")
+    print("=" * 60)
+    
+    result = make_request("GET", "/metrics")
+    
+    if result.get("status") == 200:
+        # Metrics returns plain text, not JSON
+        print("✓ Metrics endpoint available")
+        print("  (Prometheus format)")
+        return True
+    elif result.get("status") == 404:
+        print("⚠ Metrics endpoint not enabled")
+        print("  Enable with: --enable_metrics")
+        return True  # Not a failure, just not enabled
+    else:
+        print(f"✗ Metrics error: {result.get('error')}")
+        return False
+
+
+def test_admin_reload():
+    """Test admin reload endpoint."""
+    print("\n" + "=" * 60)
+    print("TEST: Admin Reload Endpoint")
+    print("=" * 60)
+    
+    result = make_request("POST", "/admin/reload")
+    
+    if result.get("status") == 200:
+        data = result["data"]
+        print("✓ Admin reload successful")
+        print(f"  Status: {data.get('status')}")
+        print(f"  Timestamp: {data.get('timestamp')}")
+        return True
+    elif result.get("status") == 404:
+        print("⚠ Admin endpoint not enabled")
+        print("  Enable with: --enable_admin")
+        return True  # Not a failure, just not enabled
+    elif result.get("status") == 401:
+        print("⚠ Admin endpoint requires authentication")
+        return True  # Expected behavior
+    else:
+        print(f"✗ Admin reload error: {result.get('error')}")
+        return False
+
+
+def test_rate_limiting():
+    """Test rate limiting."""
+    print("\n" + "=" * 60)
+    print("TEST: Rate Limiting")
+    print("=" * 60)
+    
+    # Make rapid requests
+    rate_limited = False
+    retry_after = None
+    
+    for i in range(20):
+        result = make_request("GET", "/v1/recipes")
+        
+        if result.get("status") == 429:
+            rate_limited = True
+            retry_after = result.get("headers", {}).get("Retry-After")
+            error = result.get("error", {})
+            print(f"✓ Rate limited after {i} requests")
+            print(f"  Error code: {error.get('error', {}).get('code')}")
+            print(f"  Retry-After: {retry_after}")
+            break
+    
+    if not rate_limited:
+        print("⚠ Rate limiting not triggered (may not be enabled)")
+        print("  Enable with: --rate_limit 10")
+    
+    return True
+
+
+def test_request_size_limit():
+    """Test request size limit."""
+    print("\n" + "=" * 60)
+    print("TEST: Request Size Limit")
+    print("=" * 60)
+    
+    # Create a large payload
+    large_data = {
+        "recipe": "test",
+        "input": {"data": "x" * 100000}  # ~100KB
+    }
+    
+    result = make_request("POST", "/v1/recipes/run", large_data)
+    
+    if result.get("status") == 413:
+        error = result.get("error", {})
+        print("✓ Request size limit enforced")
+        print(f"  Error code: {error.get('error', {}).get('code')}")
+        return True
+    elif result.get("status") in [200, 400, 404]:
+        print("⚠ Request size limit not triggered (limit may be higher)")
+        print("  Set with: --max_request_size 1000")
+        return True
+    else:
+        print(f"  Response: {result.get('status')} - {result.get('error')}")
+        return True
+
+
+def test_list_recipes():
+    """Test listing recipes."""
+    print("\n" + "=" * 60)
+    print("TEST: List Recipes")
+    print("=" * 60)
+    
+    result = make_request("GET", "/v1/recipes")
+    
+    if result.get("status") == 200:
+        recipes = result["data"].get("recipes", [])
+        print(f"✓ Found {len(recipes)} recipes")
+        for r in recipes[:3]:
+            print(f"  - {r.get('name')} ({r.get('version', 'unknown')})")
+        if len(recipes) > 3:
+            print(f"  ... and {len(recipes) - 3} more")
+        return True
+    elif result.get("status") == 401:
+        print("⚠ Authentication required")
+        return True
+    else:
+        print(f"✗ Error: {result.get('error')}")
+        return False
+
+
+def demonstrate_programmatic_usage():
+    """Demonstrate programmatic server configuration."""
+    print("\n" + "=" * 60)
+    print("DEMO: Programmatic Configuration")
+    print("=" * 60)
+    
+    print("""
+# Rate Limiter
+from praisonai.recipe.serve import create_rate_limiter
+limiter = create_rate_limiter(requests_per_minute=100)
+allowed, retry_after = limiter.check("client-id")
+
+# Metrics Collector
+from praisonai.recipe.serve import MetricsCollector
+metrics = MetricsCollector()
+metrics.record_request("/health", "GET", 200, 0.01)
+print(metrics.get_prometheus_metrics())
+
+# OpenAPI Spec
+from praisonai.recipe.serve import get_openapi_spec
+spec = get_openapi_spec({"enable_metrics": True, "enable_admin": True})
+print(spec["paths"].keys())
+
+# Template Search Paths
+from praisonai.recipe.core import get_template_search_paths
+paths = get_template_search_paths()
+print(f"Searching {len(paths)} paths for recipes")
+
+# Reload Registry
+from praisonai.recipe.core import reload_registry
+reload_registry()
+print("Registry reloaded")
+""")
+    
+    # Actually run the demos
+    try:
+        from praisonai.recipe.serve import create_rate_limiter, MetricsCollector, get_openapi_spec
+        from praisonai.recipe.core import get_template_search_paths, reload_registry
+        
+        # Rate limiter
+        limiter = create_rate_limiter(requests_per_minute=100)
+        allowed, _ = limiter.check("demo-client")
+        print(f"✓ Rate limiter: allowed={allowed}")
+        
+        # Metrics
+        metrics = MetricsCollector()
+        metrics.record_request("/demo", "GET", 200, 0.01)
+        prom = metrics.get_prometheus_metrics()
+        print(f"✓ Metrics: {len(prom)} chars of Prometheus format")
+        
+        # OpenAPI
+        spec = get_openapi_spec({"enable_metrics": True})
+        print(f"✓ OpenAPI: {len(spec['paths'])} paths defined")
+        
+        # Search paths
+        paths = get_template_search_paths()
+        print(f"✓ Template paths: {len(paths)} directories")
+        
+        # Reload
+        reload_registry()
+        print("✓ Registry reloaded")
+        
+    except ImportError as e:
+        print(f"⚠ Import error: {e}")
+        print("  Install with: pip install praisonai[serve]")
+
+
+def main():
+    """Main example function."""
+    print("=" * 60)
+    print("PraisonAI Recipe Server Advanced Features")
+    print("=" * 60)
+    print(f"Server URL: {SERVER_URL}")
+    print(f"API Key: {'*' * 8}..." if API_KEY else "API Key: Not set")
+    
+    # Check if server is running
+    if not test_health():
+        print("\n" + "=" * 60)
+        print("Server not running. Start it with:")
+        print("=" * 60)
+        print(f"""
+# Basic start
+praisonai recipe serve
+
+# With all features enabled
+export PRAISONAI_API_KEY={API_KEY}
+praisonai recipe serve \\
+  --auth api-key \\
+  --rate_limit 100 \\
+  --enable_metrics \\
+  --enable_admin \\
+  --workers 2
+""")
+        # Still demonstrate programmatic usage
+        demonstrate_programmatic_usage()
+        return
+    
+    # Run all tests
+    test_openapi()
+    test_metrics()
+    test_admin_reload()
+    test_rate_limiting()
+    test_request_size_limit()
+    test_list_recipes()
+    
+    # Demonstrate programmatic usage
+    demonstrate_programmatic_usage()
+    
+    print("\n" + "=" * 60)
+    print("All tests completed!")
+    print("=" * 60)
+
+
+if __name__ == "__main__":
+    main()

examples/serve/tools_as_mcp_server.py

@@ -0,0 +1,222 @@
+#!/usr/bin/env python3
+"""
+Tools as MCP Server Example
+
+Demonstrates exposing Python tools as an MCP server:
+- Register custom functions as MCP tools
+- SSE transport for Claude Desktop/Cursor
+- Stdio transport for local integration
+
+Usage:
+    # Run this example (SSE mode)
+    python tools_as_mcp_server.py
+    
+    # Or use CLI:
+    praisonai serve tools --port 8081
+    
+    # Test with curl:
+    curl http://localhost:8081/sse
+"""
+
+import sys
+
+
+def main():
+    print("=" * 60)
+    print("Tools as MCP Server Example")
+    print("=" * 60)
+    
+    try:
+        from praisonaiagents.mcp import ToolsMCPServer
+    except ImportError:
+        print("Error: praisonaiagents[mcp] not installed")
+        print("Install with: pip install 'praisonaiagents[mcp]'")
+        print("\nFallback: Using manual implementation...")
+        run_manual_server()
+        return
+    
+    # Define custom tools
+    def search_web(query: str) -> str:
+        """Search the web for information."""
+        return f"Search results for: {query}"
+    
+    def analyze_text(text: str) -> str:
+        """Analyze text for sentiment and key points."""
+        word_count = len(text.split())
+        return f"Analysis: {word_count} words, sentiment: neutral"
+    
+    def translate(text: str, target_language: str = "Spanish") -> str:
+        """Translate text to target language (mock)."""
+        return f"[Translated to {target_language}]: {text}"
+    
+    def summarize(text: str) -> str:
+        """Summarize long text."""
+        words = text.split()
+        if len(words) > 20:
+            return " ".join(words[:20]) + "..."
+        return text
+    
+    # Create MCP server
+    server = ToolsMCPServer(name="praisonai-tools")
+    
+    # Register tools
+    server.register_tool(search_web)
+    server.register_tool(analyze_text)
+    server.register_tool(translate)
+    server.register_tool(summarize)
+    
+    print(f"Registered tools: {[search_web.__name__, analyze_text.__name__, translate.__name__, summarize.__name__]}")
+    print("\nStarting MCP server with SSE transport...")
+    print("SSE endpoint: http://localhost:8081/sse")
+    print("\nClaude Desktop config (claude_desktop_config.json):")
+    print('''  {
+    "mcpServers": {
+      "praisonai-tools": {
+        "url": "http://localhost:8081/sse"
+      }
+    }
+  }''')
+    print("\nPress Ctrl+C to stop")
+    
+    server.run(transport="sse", host="0.0.0.0", port=8081)
+
+
+def run_manual_server():
+    """Manual MCP server implementation as fallback."""
+    try:
+        from fastapi import FastAPI
+        from fastapi.responses import StreamingResponse
+        import uvicorn
+        import json
+        import asyncio
+    except ImportError:
+        print("Error: FastAPI/uvicorn not installed")
+        print("Install with: pip install fastapi uvicorn")
+        sys.exit(1)
+    
+    # Define tools
+    tools = {
+        "search_web": {
+            "func": lambda query: f"Search results for: {query}",
+            "description": "Search the web for information",
+            "params": {"query": "string"}
+        },
+        "analyze_text": {
+            "func": lambda text: f"Analysis: {len(text.split())} words",
+            "description": "Analyze text for sentiment and key points",
+            "params": {"text": "string"}
+        },
+    }
+    
+    app = FastAPI(title="PraisonAI Tools MCP Server")
+    
+    @app.get("/sse")
+    async def sse_endpoint():
+        """SSE endpoint for MCP."""
+        async def event_stream():
+            # Send initial tools list
+            tools_list = {
+                "jsonrpc": "2.0",
+                "method": "tools/list",
+                "result": {
+                    "tools": [
+                        {
+                            "name": name,
+                            "description": info["description"],
+                            "inputSchema": {
+                                "type": "object",
+                                "properties": {k: {"type": v} for k, v in info["params"].items()},
+                                "required": list(info["params"].keys())
+                            }
+                        }
+                        for name, info in tools.items()
+                    ]
+                }
+            }
+            yield f"data: {json.dumps(tools_list)}\n\n"
+            
+            # Keep connection alive
+            while True:
+                await asyncio.sleep(30)
+                yield f"data: {json.dumps({'type': 'ping'})}\n\n"
+        
+        return StreamingResponse(
+            event_stream(),
+            media_type="text/event-stream",
+            headers={"Cache-Control": "no-cache", "Connection": "keep-alive"}
+        )
+    
+    @app.post("/messages/")
+    async def handle_message(request: dict):
+        """Handle MCP messages."""
+        method = request.get("method")
+        params = request.get("params", {})
+        req_id = request.get("id")
+        
+        if method == "tools/list":
+            return {
+                "jsonrpc": "2.0",
+                "id": req_id,
+                "result": {
+                    "tools": [
+                        {
+                            "name": name,
+                            "description": info["description"],
+                            "inputSchema": {
+                                "type": "object",
+                                "properties": {k: {"type": v} for k, v in info["params"].items()}
+                            }
+                        }
+                        for name, info in tools.items()
+                    ]
+                }
+            }
+        elif method == "tools/call":
+            tool_name = params.get("name")
+            arguments = params.get("arguments", {})
+            
+            if tool_name not in tools:
+                return {"jsonrpc": "2.0", "id": req_id, "error": {"code": -32601, "message": f"Tool not found: {tool_name}"}}
+            
+            try:
+                func = tools[tool_name]["func"]
+                arg = list(arguments.values())[0] if arguments else ""
+                result = func(arg)
+                return {
+                    "jsonrpc": "2.0",
+                    "id": req_id,
+                    "result": {"content": [{"type": "text", "text": result}]}
+                }
+            except Exception as e:
+                return {"jsonrpc": "2.0", "id": req_id, "error": {"code": -32000, "message": str(e)}}
+        
+        return {"jsonrpc": "2.0", "id": req_id, "error": {"code": -32601, "message": f"Unknown method: {method}"}}
+    
+    @app.get("/__praisonai__/discovery")
+    async def discovery():
+        return {
+            "schema_version": "1.0.0",
+            "server_name": "praisonai-tools-mcp",
+            "providers": [{"type": "tools-mcp", "name": "Tools MCP Server", "capabilities": ["list-tools", "call-tool"]}],
+            "endpoints": [{"name": "tools", "provider_type": "tools-mcp"}]
+        }
+    
+    @app.get("/")
+    async def root():
+        return {
+            "message": "PraisonAI Tools MCP Server",
+            "tools": list(tools.keys()),
+            "sse": "/sse",
+            "messages": "/messages/"
+        }
+    
+    print(f"Tools: {list(tools.keys())}")
+    print("\nStarting Tools MCP server on http://localhost:8081")
+    print("SSE endpoint: http://localhost:8081/sse")
+    print("\nPress Ctrl+C to stop")
+    
+    uvicorn.run(app, host="127.0.0.1", port=8081)
+
+
+if __name__ == "__main__":
+    main()

examples/serve/unified_server.py

@@ -0,0 +1,241 @@
+#!/usr/bin/env python3
+"""
+Unified Server Example
+
+Demonstrates launching a unified server with all provider types:
+- agents-api: Single/multi-agent HTTP API
+- recipe: Recipe runner endpoints
+- mcp: MCP server
+- a2a: Agent-to-agent protocol
+- a2u: Agent-to-user event stream
+
+Usage:
+    # Run this example
+    python unified_server.py
+    
+    # Or use CLI:
+    praisonai serve unified --port 8765
+    
+    # Test with curl:
+    curl http://localhost:8765/__praisonai__/discovery
+    curl http://localhost:8765/health
+"""
+
+import os
+import sys
+
+if not os.environ.get("OPENAI_API_KEY"):
+    print("Error: OPENAI_API_KEY environment variable not set")
+    sys.exit(1)
+
+
+def main():
+    print("=" * 60)
+    print("Unified Server Example")
+    print("=" * 60)
+    
+    try:
+        from fastapi import FastAPI
+        import uvicorn
+        from praisonaiagents import Agent
+    except ImportError as e:
+        print(f"Error: Missing dependency - {e}")
+        print("Install with: pip install praisonaiagents fastapi uvicorn")
+        sys.exit(1)
+    
+    # Create agents
+    assistant = Agent(
+        name="Assistant",
+        role="Helpful AI Assistant",
+        goal="Help users with their questions",
+        llm="gpt-4o-mini"
+    )
+    
+    researcher = Agent(
+        name="Researcher",
+        role="Research Specialist",
+        goal="Find accurate information",
+        llm="gpt-4o-mini"
+    )
+    
+    agents = [assistant, researcher]
+    agent_map = {a.name.lower(): a for a in agents}
+    
+    # Create unified app
+    app = FastAPI(
+        title="PraisonAI Unified Server",
+        description="Unified server with all PraisonAI providers"
+    )
+    
+    # Discovery endpoint
+    @app.get("/__praisonai__/discovery")
+    async def discovery():
+        return {
+            "schema_version": "1.0.0",
+            "server_name": "praisonai-unified",
+            "providers": [
+                {"type": "agents-api", "name": "Agents API", "capabilities": ["invoke", "health"]},
+                {"type": "recipe", "name": "Recipe Runner", "capabilities": ["list", "describe", "invoke"]},
+                {"type": "mcp", "name": "MCP Server", "capabilities": ["list-tools", "call-tool"]},
+                {"type": "a2a", "name": "A2A Protocol", "capabilities": ["agent-card", "message-send"]},
+                {"type": "a2u", "name": "A2U Event Stream", "capabilities": ["subscribe", "stream"]},
+            ],
+            "endpoints": [
+                {"name": "agents", "provider_type": "agents-api", "description": "Multi-agent router"},
+                {"name": "agent", "provider_type": "agents-api", "description": "Single agent endpoint"},
+                {"name": "mcp/tools", "provider_type": "mcp", "description": "MCP tools"},
+                {"name": "a2a", "provider_type": "a2a", "description": "A2A protocol"},
+                {"name": "a2u/events", "provider_type": "a2u", "description": "Event stream"},
+            ]
+        }
+    
+    # Health endpoint
+    @app.get("/health")
+    async def health():
+        return {
+            "status": "healthy",
+            "providers": ["agents-api", "recipe", "mcp", "a2a", "a2u"],
+            "agents": len(agents)
+        }
+    
+    # Agents API endpoints
+    @app.post("/agents")
+    async def route_agents(request: dict):
+        query = request.get("query", "")
+        agent = agents[0]  # Simple routing
+        try:
+            response = agent.chat(query)
+            return {"agent": agent.name, "response": response}
+        except Exception as e:
+            return {"error": str(e)}
+    
+    @app.post("/agents/{name}")
+    async def query_agent(name: str, request: dict):
+        agent = agent_map.get(name.lower())
+        if not agent:
+            return {"error": f"Agent not found: {name}"}
+        try:
+            response = agent.chat(request.get("query", ""))
+            return {"agent": agent.name, "response": response}
+        except Exception as e:
+            return {"error": str(e)}
+    
+    @app.get("/agents/list")
+    async def list_agents():
+        return {"agents": [{"name": a.name, "role": a.role} for a in agents]}
+    
+    # Single agent endpoint
+    @app.post("/agent")
+    async def single_agent(request: dict):
+        query = request.get("query", "")
+        try:
+            response = assistant.chat(query)
+            return {"response": response}
+        except Exception as e:
+            return {"error": str(e)}
+    
+    # MCP endpoints
+    mcp_tools = {
+        "search": {"description": "Search the web", "func": lambda q: f"Results for: {q}"},
+        "calculate": {"description": "Calculate expression", "func": lambda e: str(eval(e)) if e.replace(" ", "").replace("+", "").replace("-", "").replace("*", "").replace("/", "").replace(".", "").isdigit() or True else "Error"},
+    }
+    
+    @app.get("/mcp/tools")
+    async def list_mcp_tools():
+        return {
+            "tools": [
+                {"name": name, "description": info["description"]}
+                for name, info in mcp_tools.items()
+            ]
+        }
+    
+    @app.post("/mcp/tools/call")
+    async def call_mcp_tool(request: dict):
+        tool_name = request.get("tool")
+        args = request.get("arguments", {})
+        if tool_name not in mcp_tools:
+            return {"error": f"Tool not found: {tool_name}"}
+        try:
+            result = mcp_tools[tool_name]["func"](list(args.values())[0] if args else "")
+            return {"result": result}
+        except Exception as e:
+            return {"error": str(e)}
+    
+    # A2A endpoints
+    @app.get("/.well-known/agent.json")
+    async def agent_card():
+        return {
+            "name": "PraisonAI Unified",
+            "description": "Unified PraisonAI server with multiple agents",
+            "url": "http://localhost:8765/a2a",
+            "version": "1.0.0",
+            "capabilities": {"streaming": True}
+        }
+    
+    @app.post("/a2a")
+    async def a2a_endpoint(request: dict):
+        method = request.get("method")
+        params = request.get("params", {})
+        req_id = request.get("id")
+        
+        if method == "message/send":
+            message = params.get("message", {})
+            parts = message.get("parts", [])
+            text = "".join(p.get("text", "") for p in parts if p.get("type") == "text")
+            
+            try:
+                response = assistant.chat(text)
+                return {
+                    "jsonrpc": "2.0",
+                    "id": req_id,
+                    "result": {
+                        "message": {
+                            "role": "agent",
+                            "parts": [{"type": "text", "text": response}]
+                        }
+                    }
+                }
+            except Exception as e:
+                return {"jsonrpc": "2.0", "id": req_id, "error": {"code": -32000, "message": str(e)}}
+        
+        return {"jsonrpc": "2.0", "id": req_id, "error": {"code": -32601, "message": f"Unknown method: {method}"}}
+    
+    # A2U endpoints
+    @app.get("/a2u/info")
+    async def a2u_info():
+        return {
+            "name": "A2U Event Stream",
+            "version": "1.0.0",
+            "streams": ["events"],
+            "event_types": ["agent.started", "agent.response", "agent.completed"]
+        }
+    
+    # Root endpoint
+    @app.get("/")
+    async def root():
+        return {
+            "message": "PraisonAI Unified Server",
+            "providers": ["agents-api", "recipe", "mcp", "a2a", "a2u"],
+            "discovery": "/__praisonai__/discovery",
+            "health": "/health",
+            "docs": "/docs"
+        }
+    
+    print(f"Agents: {[a.name for a in agents]}")
+    print("\nStarting unified server on http://localhost:8765")
+    print("\nEndpoints:")
+    print("  GET  /__praisonai__/discovery - Discovery document")
+    print("  GET  /health - Health check")
+    print("  POST /agents - Multi-agent router")
+    print("  POST /agent - Single agent")
+    print("  GET  /mcp/tools - List MCP tools")
+    print("  GET  /.well-known/agent.json - A2A agent card")
+    print("  POST /a2a - A2A messages")
+    print("  GET  /a2u/info - A2U info")
+    print("\nPress Ctrl+C to stop")
+    
+    uvicorn.run(app, host="127.0.0.1", port=8765)
+
+
+if __name__ == "__main__":
+    main()

src/praisonai/examples/python/recipes_background/README.md

@@ -0,0 +1,66 @@
+# Recipe Background Tasks Example
+
+This example demonstrates how to run recipes and agents as background tasks.
+
+## Prerequisites
+
+```bash
+pip install praisonai praisonaiagents
+export OPENAI_API_KEY="your-api-key"
+```
+
+## Python Example
+
+```bash
+python example_background.py
+```
+
+## CLI Examples
+
+### Submit a recipe as background task
+
+```bash
+# Submit recipe to background
+praisonai background submit --recipe my-recipe --input '{"query": "test"}'
+
+# Check status
+praisonai background status <task_id>
+
+# List all tasks
+praisonai background list
+
+# Cancel a task
+praisonai background cancel <task_id>
+
+# Clear completed tasks
+praisonai background clear
+```
+
+### Run recipe with --background flag
+
+```bash
+# Run recipe in background
+praisonai recipe run my-recipe --background
+
+# With input
+praisonai recipe run my-recipe --background --input '{"topic": "AI"}'
+
+# With session ID
+praisonai recipe run my-recipe --background --session-id session_123
+```
+
+## Key Features
+
+- **Async Execution**: Tasks run in the background without blocking
+- **Progress Tracking**: Monitor task progress and status
+- **Cancellation**: Cancel running tasks when needed
+- **Result Retrieval**: Get results when tasks complete
+- **Concurrency Control**: Limit concurrent tasks
+
+## Safe Defaults
+
+| Setting | Default | Description |
+|---------|---------|-------------|
+| `timeout_sec` | 300 | Maximum execution time |
+| `max_concurrent` | 5 | Maximum concurrent tasks |
+| `cleanup_delay_sec` | 3600 | Auto-cleanup delay |

src/praisonai/examples/python/recipes_background/example_background.py

@@ -0,0 +1,77 @@
+#!/usr/bin/env python3
+"""
+Recipe Background Tasks Example
+
+This example demonstrates how to run recipes as background tasks
+with progress tracking and result retrieval.
+
+Requirements:
+    pip install praisonai
+
+Usage:
+    python example_background.py
+"""
+
+import asyncio
+
+
+async def main():
+    """Run a recipe as a background task."""
+    
+    print("=" * 60)
+    print("Recipe Background Tasks Example")
+    print("=" * 60)
+    
+    # For this example, we'll use a simple inline agent instead of a recipe
+    # In production, you would use an actual recipe name
+    from praisonaiagents import Agent
+    from praisonaiagents.background import BackgroundRunner
+    
+    # Create an agent
+    agent = Agent(
+        name="Research Assistant",
+        instructions="You are a helpful research assistant. Provide concise answers.",
+        verbose=True
+    )
+    
+    # Create background runner
+    runner = BackgroundRunner(max_concurrent_tasks=3)
+    
+    print("\n1. Submitting task to background...")
+    
+    # Submit task
+    task = await runner.submit(
+        lambda: agent.start("What are the top 3 benefits of AI in healthcare?"),
+        name="healthcare-research",
+        timeout=120,
+    )
+    
+    print(f"   Task ID: {task.id}")
+    print(f"   Status: {task.status.value}")
+    
+    print("\n2. Waiting for completion...")
+    
+    # Wait for result
+    result = await runner.wait_for_task(task.id, timeout=120)
+    
+    print("\n3. Task completed!")
+    print(f"   Status: {task.status.value}")
+    print(f"   Result preview: {str(result)[:200]}...")
+    
+    # List all tasks
+    print("\n4. Listing all tasks:")
+    tasks = runner.list_tasks()
+    for t in tasks:
+        print("   - %s: %s" % (t['id'], t['status']))
+    
+    # Clear completed tasks
+    print("\n5. Clearing completed tasks...")
+    runner.clear_completed()
+    
+    print("\n" + "=" * 60)
+    print("Example completed successfully!")
+    print("=" * 60)
+
+
+if __name__ == "__main__":
+    asyncio.run(main())

src/praisonai/examples/python/recipes_jobs/README.md

@@ -0,0 +1,97 @@
+# Recipe Async Jobs Example
+
+This example demonstrates how to submit recipes as async jobs to a jobs server.
+
+## Prerequisites
+
+```bash
+pip install praisonai praisonaiagents httpx uvicorn
+export OPENAI_API_KEY="your-api-key"
+```
+
+## Start the Jobs Server
+
+```bash
+python -m uvicorn praisonai.jobs.server:create_app --port 8005 --factory
+```
+
+## Python Example
+
+```bash
+python example_jobs.py
+```
+
+## CLI Examples
+
+### Submit a job
+
+```bash
+# Basic submission
+praisonai run submit "Analyze AI trends"
+
+# Submit with recipe
+praisonai run submit "Analyze news" --recipe news-analyzer
+
+# Wait for completion
+praisonai run submit "Quick task" --wait
+
+# Stream progress
+praisonai run submit "Long task" --stream
+
+# With webhook
+praisonai run submit "Task" --webhook-url https://example.com/callback
+
+# With idempotency
+praisonai run submit "Task" --idempotency-key order-123
+
+# With metadata
+praisonai run submit "Task" --metadata user=john --metadata priority=high
+```
+
+### Check status
+
+```bash
+praisonai run status <job_id>
+praisonai run status <job_id> --json
+```
+
+### Get result
+
+```bash
+praisonai run result <job_id>
+praisonai run result <job_id> --json
+```
+
+### Stream progress
+
+```bash
+praisonai run stream <job_id>
+```
+
+### List jobs
+
+```bash
+praisonai run list
+praisonai run list --status running
+```
+
+### Cancel job
+
+```bash
+praisonai run cancel <job_id>
+```
+
+## Key Features
+
+- **Server-based**: Jobs persist across restarts
+- **Webhooks**: Get notified when jobs complete
+- **Idempotency**: Prevent duplicate submissions
+- **Streaming**: Real-time progress updates
+- **Metadata**: Attach custom data to jobs
+
+## Safe Defaults
+
+| Setting | Default | Description |
+|---------|---------|-------------|
+| `timeout` | 3600 | Maximum execution time (1 hour) |
+| `api_url` | http://127.0.0.1:8005 | Jobs server URL |

src/praisonai/examples/python/recipes_jobs/example_jobs.py

@@ -0,0 +1,96 @@
+#!/usr/bin/env python3
+"""
+Recipe Async Jobs Example
+
+This example demonstrates how to submit recipes as async jobs
+to a jobs server with webhooks and idempotency.
+
+Requirements:
+    pip install praisonai httpx
+
+Usage:
+    1. Start the jobs server:
+       python -m uvicorn praisonai.jobs.server:create_app --port 8005 --factory
+    
+    2. Run this example:
+       python example_jobs.py
+"""
+
+import time
+
+
+def main():
+    """Submit and monitor an async job."""
+    
+    print("=" * 60)
+    print("Recipe Async Jobs Example")
+    print("=" * 60)
+    
+    # Import the jobs handler
+    from praisonai.cli.features.jobs import JobsHandler
+    
+    # Create handler
+    handler = JobsHandler(
+        api_url="http://127.0.0.1:8005",
+        verbose=True
+    )
+    
+    print("\n1. Submitting job...")
+    
+    try:
+        # Submit a job
+        result = handler.submit(
+            prompt="What are the key trends in AI for 2024?",
+            framework="praisonai",
+            timeout=300,
+            wait=False,  # Don't wait, we'll poll manually
+            output_json=False
+        )
+        
+        job_id = result.get("job_id")
+        print(f"   Job ID: {job_id}")
+        print(f"   Status: {result.get('status')}")
+        
+        print("\n2. Polling for completion...")
+        
+        # Poll for completion
+        max_polls = 60
+        for i in range(max_polls):
+            status_result = handler.status(job_id)
+            status = status_result.get("status")
+            progress = status_result.get("progress", 0)
+            
+            print(f"   [{i+1}/{max_polls}] Status: {status}, Progress: {progress}%")
+            
+            if status in ["succeeded", "failed", "cancelled"]:
+                break
+            
+            time.sleep(5)
+        
+        print("\n3. Getting result...")
+        
+        # Get result
+        result = handler.result(job_id)
+        print(f"   Status: {result.get('status')}")
+        
+        if result.get("result"):
+            output = str(result.get("result"))
+            print(f"   Result preview: {output[:200]}...")
+        
+        print("\n4. Listing all jobs...")
+        
+        # List jobs
+        handler.list_jobs(page=1, page_size=10)
+        
+    except Exception as e:
+        print(f"\n   Error: {e}")
+        print("\n   Make sure the jobs server is running:")
+        print("   python -m uvicorn praisonai.jobs.server:create_app --port 8005 --factory")
+    
+    print("\n" + "=" * 60)
+    print("Example completed!")
+    print("=" * 60)
+
+
+if __name__ == "__main__":
+    main()

src/praisonai/examples/python/recipes_scheduler/README.md

@@ -0,0 +1,116 @@
+# Recipe Scheduler Example
+
+This example demonstrates how to schedule recipes and agents to run periodically.
+
+## Prerequisites
+
+```bash
+pip install praisonai praisonaiagents
+export OPENAI_API_KEY="your-api-key"
+```
+
+## Python Example
+
+```bash
+python example_scheduler.py
+```
+
+Press Ctrl+C to stop the scheduler and see statistics.
+
+## CLI Examples
+
+### Start a scheduler with task
+
+```bash
+# Basic scheduler
+praisonai schedule start news-checker "Check AI news" --interval hourly
+
+# With timeout and budget
+praisonai schedule start reporter "Generate report" \
+    --interval daily \
+    --timeout 300 \
+    --max-cost 1.00
+
+# With max retries
+praisonai schedule start checker "Check updates" \
+    --interval hourly \
+    --max-retries 5
+```
+
+### Start a scheduler with recipe
+
+```bash
+# Schedule a recipe
+praisonai schedule start news-monitor --recipe news-analyzer --interval hourly
+
+# With all options
+praisonai schedule start my-scheduler \
+    --recipe my-recipe \
+    --interval "*/6h" \
+    --timeout 600 \
+    --max-cost 2.00 \
+    --max-retries 3
+```
+
+### Foreground mode (for testing)
+
+```bash
+# Run in foreground (Ctrl+C to stop)
+praisonai schedule "Check news" --interval "*/30s"
+```
+
+### Manage schedulers
+
+```bash
+# List all schedulers
+praisonai schedule list
+
+# View logs
+praisonai schedule logs news-checker --follow
+
+# Show statistics
+praisonai schedule stats news-checker
+
+# Stop a scheduler
+praisonai schedule stop news-checker
+
+# Stop all schedulers
+praisonai schedule stop-all
+
+# Delete a scheduler
+praisonai schedule delete news-checker
+```
+
+### Export scheduler config
+
+```bash
+praisonai schedule save news-checker --output news-checker.yaml
+```
+
+## Interval Formats
+
+| Format | Description |
+|--------|-------------|
+| `hourly` | Every hour |
+| `daily` | Every day |
+| `*/30m` | Every 30 minutes |
+| `*/6h` | Every 6 hours |
+| `*/30s` | Every 30 seconds (for testing) |
+| `3600` | Every 3600 seconds |
+
+## Key Features
+
+- **Periodic Execution**: Run tasks at regular intervals
+- **Retry Logic**: Automatic retries on failure
+- **Cost Budgeting**: Set spending limits
+- **Daemon Mode**: Run in background
+- **Statistics**: Track success rates
+
+## Safe Defaults
+
+| Setting | Default | Description |
+|---------|---------|-------------|
+| `interval` | hourly | Execution interval |
+| `max_retries` | 3 | Retry attempts |
+| `timeout` | 300 | Timeout per execution |
+| `max_cost` | 1.00 | Budget limit (USD) |

src/praisonai/examples/python/recipes_scheduler/example_scheduler.py

@@ -0,0 +1,86 @@
+#!/usr/bin/env python3
+"""
+Recipe Scheduler Example
+
+This example demonstrates how to schedule recipes and agents
+to run periodically with retry logic and cost budgeting.
+
+Requirements:
+    pip install praisonai praisonaiagents
+
+Usage:
+    python example_scheduler.py
+"""
+
+import time
+import signal
+import sys
+
+
+def main():
+    """Run a scheduled agent."""
+    
+    print("=" * 60)
+    print("Recipe Scheduler Example")
+    print("=" * 60)
+    
+    from praisonaiagents import Agent
+    from praisonai.scheduler import AgentScheduler
+    
+    # Create an agent
+    agent = Agent(
+        name="News Monitor",
+        instructions="You are a news monitoring assistant. Provide brief updates.",
+        verbose=True
+    )
+    
+    # Create scheduler
+    scheduler = AgentScheduler(
+        agent=agent,
+        task="What is the latest news in AI? Give a one-sentence summary.",
+        timeout=60,
+        max_cost=0.10  # $0.10 budget limit
+    )
+    
+    print("\n1. Starting scheduler...")
+    print("   Interval: every 30 seconds (for demo)")
+    print("   Max retries: 3")
+    print("   Timeout: 60s")
+    print("   Budget: $0.10")
+    
+    # Handle Ctrl+C gracefully
+    def signal_handler(sig, frame):
+        print("\n\n2. Stopping scheduler...")
+        scheduler.stop()
+        
+        # Show stats
+        stats = scheduler.get_stats()
+        print("\n3. Final Statistics:")
+        print(f"   Total Executions: {stats['total_executions']}")
+        print(f"   Successful: {stats['successful_executions']}")
+        print(f"   Failed: {stats['failed_executions']}")
+        print(f"   Success Rate: {stats['success_rate']:.1f}%")
+        
+        print("\n" + "=" * 60)
+        print("Example completed!")
+        print("=" * 60)
+        sys.exit(0)
+    
+    signal.signal(signal.SIGINT, signal_handler)
+    
+    # Start scheduler with short interval for demo
+    scheduler.start(
+        schedule_expr="*/30s",  # Every 30 seconds for demo
+        max_retries=3,
+        run_immediately=True
+    )
+    
+    print("\n   Press Ctrl+C to stop...\n")
+    
+    # Keep running
+    while scheduler.is_running:
+        time.sleep(1)
+
+
+if __name__ == "__main__":
+    main()

src/praisonai/examples/recipe_runtime_example.yaml

@@ -0,0 +1,94 @@
+# Example TEMPLATE.yaml with Runtime Configuration
+# This demonstrates the new runtime block for background/job/schedule execution
+
+schema_version: "1.0"
+name: news-monitor
+version: "1.0.0"
+description: |
+  A recipe that monitors AI news and summarizes findings.
+  Supports background execution, async jobs, and scheduled runs.
+
+author: praisonai
+license: Apache-2.0
+tags:
+  - news
+  - monitoring
+  - ai
+
+# Dependencies
+requires:
+  packages:
+    - praisonaiagents>=0.0.1
+  env:
+    - OPENAI_API_KEY
+
+# Entry points
+workflow: workflow.yaml
+agents: agents.yaml
+
+# Configuration schema
+config:
+  topic:
+    type: string
+    description: Topic to monitor
+    default: "AI and machine learning"
+  max_articles:
+    type: integer
+    description: Maximum articles to fetch
+    default: 5
+
+# Default values
+defaults:
+  topic: "AI and machine learning"
+  max_articles: 5
+
+# Runtime configuration for operational features
+runtime:
+  # Background task execution
+  background:
+    enabled: true
+    max_concurrent: 3
+    cleanup_delay_sec: 3600
+
+  # Async job execution
+  job:
+    enabled: true
+    timeout_sec: 600
+    webhook_url: "${WEBHOOK_URL}"  # Environment variable interpolation
+    idempotency_scope: "session"
+    events:
+      - completed
+      - failed
+
+  # Scheduled execution
+  schedule:
+    enabled: true
+    interval: "hourly"
+    max_retries: 3
+    run_immediately: false
+    timeout_sec: 300
+    max_cost_usd: 1.00
+
+# CLI integration
+cli:
+  command: news-monitor
+  arguments:
+    - name: topic
+      short: -t
+      description: Topic to monitor
+    - name: max-articles
+      short: -n
+      description: Maximum articles
+
+# Example usage
+examples:
+  - name: Basic usage
+    command: praisonai recipe run news-monitor
+  - name: With custom topic
+    command: praisonai recipe run news-monitor -i '{"topic": "LLMs"}'
+  - name: Background execution
+    command: praisonai recipe run news-monitor --background
+  - name: Submit as job
+    command: praisonai run submit "Monitor AI news" --recipe news-monitor
+  - name: Schedule hourly
+    command: praisonai schedule news-monitor --interval hourly

src/praisonai/praisonai.rb

@@ -3,8 +3,8 @@ class Praisonai < Formula
   
     desc "AI tools for various AI applications"
     homepage "https://github.com/MervinPraison/PraisonAI"
-    url "https://github.com/MervinPraison/PraisonAI/archive/refs/tags/v2.7.3.tar.gz"
-    sha256 `curl -sL https://github.com/MervinPraison/PraisonAI/archive/refs/tags/v2.7.3.tar.gz | shasum -a 256`.split.first
+    url "https://github.com/MervinPraison/PraisonAI/archive/refs/tags/v2.7.6.tar.gz"
+    sha256 `curl -sL https://github.com/MervinPraison/PraisonAI/archive/refs/tags/v2.7.6.tar.gz | shasum -a 256`.split.first
     license "MIT"
   
     depends_on "[email protected]"

src/praisonai/praisonai/cli/features/agent_scheduler.py

@@ -63,19 +63,30 @@ class AgentSchedulerHandler:
         from datetime import datetime
         
         if not unknown_args:
-            print("❌ Error: Please provide scheduler name and task")
+            print("❌ Error: Please provide scheduler name and task/recipe")
             print("\nUsage:")
             print('  praisonai schedule start <name> "Your task" --interval hourly')
+            print('  praisonai schedule start <name> --recipe <recipe-name> --interval hourly')
             print("\nExample:")
             print('  praisonai schedule start news-checker "Check AI news" --interval hourly')
+            print('  praisonai schedule start news-checker --recipe news-monitor --interval hourly')
             return 1
         
         # Parse arguments
         name = unknown_args[0]
-        task = unknown_args[1] if len(unknown_args) > 1 else None
         
-        if not task:
-            print("❌ Error: Please provide a task")
+        # Check for --recipe flag in unknown_args
+        recipe_name = None
+        task = None
+        if "--recipe" in unknown_args:
+            recipe_idx = unknown_args.index("--recipe")
+            if recipe_idx + 1 < len(unknown_args):
+                recipe_name = unknown_args[recipe_idx + 1]
+        else:
+            task = unknown_args[1] if len(unknown_args) > 1 else None
+        
+        if not task and not recipe_name:
+            print("❌ Error: Please provide a task or --recipe <name>")
             return 1
         
         # Get options
@@ -93,7 +104,10 @@ class AgentSchedulerHandler:
         
         # Start daemon
         print(f"🚀 Starting scheduler '{name}'...")
-        print(f"   Task: {task}")
+        if recipe_name:
+            print(f"   Recipe: {recipe_name}")
+        else:
+            print(f"   Task: {task}")
         print(f"   Interval: {interval}")
         if timeout:
             print(f"   Timeout: {timeout}s")
@@ -103,6 +117,7 @@ class AgentSchedulerHandler:
         pid = daemon_manager.start_scheduler_daemon(
             name=name,
             task=task,
+            recipe_name=recipe_name,
             interval=interval,
             max_cost=max_cost,
             timeout=timeout,
@@ -114,6 +129,7 @@ class AgentSchedulerHandler:
             "name": name,
             "pid": pid,
             "task": task,
+            "recipe_name": recipe_name,
             "interval": interval,
             "timeout": timeout,
             "max_cost": max_cost,
@@ -555,6 +571,18 @@ class AgentSchedulerHandler:
             logging.getLogger('praisonai.scheduler').setLevel(logging.WARNING)
         
         try:
+            # Check if this is a recipe name (not a file, not a prompt with spaces)
+            is_recipe_mode = False
+            if first_arg and not is_yaml_mode:
+                # Try to resolve as recipe if it looks like a recipe name (no spaces, no file extension)
+                if ' ' not in first_arg and not first_arg.endswith('.yaml') and not first_arg.endswith('.yml'):
+                    try:
+                        from praisonai.recipe.bridge import resolve
+                        resolve(first_arg)  # Just check if it resolves
+                        is_recipe_mode = True
+                    except Exception:
+                        pass  # Not a recipe, continue with prompt mode
+            
             if is_yaml_mode:
                 # YAML mode: Load from agents.yaml
                 yaml_path = first_arg
@@ -566,12 +594,23 @@ class AgentSchedulerHandler:
                     timeout_override=timeout_override,
                     max_cost_override=max_cost_override
                 )
+            elif is_recipe_mode:
+                # Recipe mode: Load from recipe name
+                print(f"🍳 Loading recipe: {first_arg}")
+                scheduler = AgentScheduler.from_recipe(
+                    recipe_name=first_arg,
+                    interval_override=interval_override,
+                    max_retries_override=max_retries_override,
+                    timeout_override=timeout_override,
+                    max_cost_override=max_cost_override
+                )
             else:
                 # Prompt mode: Create agent from direct prompt
                 if not first_arg:
-                    print("❌ Error: Please provide either a YAML file or a task prompt")
+                    print("❌ Error: Please provide either a YAML file, recipe name, or a task prompt")
                     print("\nExamples:")
                     print("  praisonai schedule agents.yaml")
+                    print("  praisonai schedule my-recipe --interval hourly")
                     print('  praisonai schedule "Check news every hour" --interval hourly')
                     return 1
                 

src/praisonai/praisonai/cli/features/background.py

@@ -10,7 +10,6 @@ Commands:
 - praisonai background clear             # Clear completed tasks
 """
 
-import os
 import asyncio
 from typing import Optional, List
 
@@ -235,62 +234,123 @@ def handle_background_command(args: List[str], verbose: bool = False):
     Handle background CLI commands.
     
     Usage:
-        praisonai background list [--status <status>]
-        praisonai background status <task_id>
-        praisonai background cancel <task_id>
-        praisonai background clear
+        praisonai background list [--status <status>] [--json] [--page N] [--page-size N]
+        praisonai background status <task_id> [--json]
+        praisonai background cancel <task_id> [--json]
+        praisonai background clear [--all] [--older-than SEC] [--json]
+        praisonai background submit --recipe <name> [--input JSON] [--session-id ID] [--timeout SEC] [--json]
     """
-    handler = BackgroundHandler(verbose=verbose)
+    import argparse
+    import json
+    
+    parser = argparse.ArgumentParser(prog="praisonai background", description="Manage background tasks")
+    subparsers = parser.add_subparsers(dest="subcommand", help="Available commands")
+    
+    # List command
+    list_parser = subparsers.add_parser("list", help="List background tasks")
+    list_parser.add_argument("--status", choices=["pending", "running", "completed", "failed", "cancelled"], help="Filter by status")
+    list_parser.add_argument("--json", dest="output_json", action="store_true", help="Output JSON")
+    list_parser.add_argument("--page", type=int, default=1, help="Page number")
+    list_parser.add_argument("--page-size", type=int, default=20, help="Tasks per page")
+    
+    # Status command
+    status_parser = subparsers.add_parser("status", help="Get task status")
+    status_parser.add_argument("task_id", help="Task ID")
+    status_parser.add_argument("--json", dest="output_json", action="store_true", help="Output JSON")
+    
+    # Cancel command
+    cancel_parser = subparsers.add_parser("cancel", help="Cancel a task")
+    cancel_parser.add_argument("task_id", help="Task ID")
+    cancel_parser.add_argument("--json", dest="output_json", action="store_true", help="Output JSON")
+    
+    # Clear command
+    clear_parser = subparsers.add_parser("clear", help="Clear completed tasks")
+    clear_parser.add_argument("--all", action="store_true", help="Clear all tasks including running")
+    clear_parser.add_argument("--older-than", type=int, help="Clear tasks older than N seconds")
+    clear_parser.add_argument("--json", dest="output_json", action="store_true", help="Output JSON")
+    
+    # Submit command (NEW - for recipe background submission)
+    submit_parser = subparsers.add_parser("submit", help="Submit a recipe as background task")
+    submit_parser.add_argument("--recipe", required=True, dest="recipe_name", help="Recipe name to execute")
+    submit_parser.add_argument("--input", "-i", dest="input_data", help="Input data as JSON string")
+    submit_parser.add_argument("--config", "-c", help="Config overrides as JSON string")
+    submit_parser.add_argument("--session-id", "-s", help="Session ID for conversation continuity")
+    submit_parser.add_argument("--timeout", type=int, default=300, help="Timeout in seconds (default: 300)")
+    submit_parser.add_argument("--json", dest="output_json", action="store_true", help="Output JSON")
     
     if not args:
-        print("Usage: praisonai background <command> [options]")
-        print("\nCommands:")
-        print("  list [--status <status>]  List background tasks")
-        print("  status <task_id>          Get task status")
-        print("  cancel <task_id>          Cancel a task")
-        print("  clear                     Clear completed tasks")
+        parser.print_help()
         return
     
-    command = args[0]
+    # Handle legacy help
+    if args[0] in ["help", "--help", "-h"]:
+        parser.print_help()
+        return
     
-    if command == "list":
-        status = None
-        if "--status" in args:
-            idx = args.index("--status")
-            if idx + 1 < len(args):
-                status = args[idx + 1]
+    parsed = parser.parse_args(args)
+    
+    if not parsed.subcommand:
+        parser.print_help()
+        return
+    
+    handler = BackgroundHandler(verbose=verbose)
+    
+    try:
+        if parsed.subcommand == "list":
+            asyncio.run(handler.list_tasks(status=parsed.status))
         
-        asyncio.run(handler.list_tasks(status=status))
-    
-    elif command == "status":
-        if len(args) < 2:
-            print("Usage: praisonai background status <task_id>")
-            return
+        elif parsed.subcommand == "status":
+            asyncio.run(handler.get_status(parsed.task_id))
         
-        asyncio.run(handler.get_status(args[1]))
-    
-    elif command == "cancel":
-        if len(args) < 2:
-            print("Usage: praisonai background cancel <task_id>")
-            return
+        elif parsed.subcommand == "cancel":
+            asyncio.run(handler.cancel_task(parsed.task_id))
         
-        asyncio.run(handler.cancel_task(args[1]))
+        elif parsed.subcommand == "clear":
+            asyncio.run(handler.clear_completed())
+        
+        elif parsed.subcommand == "submit":
+            # Parse input and config
+            input_data = None
+            if parsed.input_data:
+                try:
+                    input_data = json.loads(parsed.input_data)
+                except json.JSONDecodeError:
+                    input_data = {"input": parsed.input_data}
+            
+            config = None
+            if parsed.config:
+                try:
+                    config = json.loads(parsed.config)
+                except json.JSONDecodeError:
+                    print("Error: --config must be valid JSON")
+                    return
+            
+            # Submit recipe as background task
+            from praisonai.recipe.operations import run_background
+            
+            task = run_background(
+                parsed.recipe_name,
+                input=input_data,
+                config=config,
+                session_id=parsed.session_id,
+                timeout_sec=parsed.timeout,
+            )
+            
+            if parsed.output_json:
+                print(json.dumps({
+                    "ok": True,
+                    "task_id": task.task_id,
+                    "recipe": task.recipe_name,
+                    "session_id": task.session_id,
+                }))
+            else:
+                print(f"✓ Recipe '{parsed.recipe_name}' submitted to background")
+                print(f"  Task ID: {task.task_id}")
+                print(f"  Session: {task.session_id}")
+                print(f"\nCheck status with: praisonai background status {task.task_id}")
     
-    elif command == "clear":
-        asyncio.run(handler.clear_completed())
-    
-    elif command == "help" or command == "--help":
-        print("Background CLI Commands:")
-        print("\n  praisonai background list [--status <status>]")
-        print("    List all background tasks")
-        print("    Status: pending, running, completed, failed, cancelled")
-        print("\n  praisonai background status <task_id>")
-        print("    Get detailed status of a specific task")
-        print("\n  praisonai background cancel <task_id>")
-        print("    Cancel a running task")
-        print("\n  praisonai background clear")
-        print("    Clear all completed tasks from the list")
-    
-    else:
-        print(f"Unknown command: {command}")
-        print("Use 'praisonai background help' for available commands")
+    except Exception as e:
+        if getattr(parsed, 'output_json', False):
+            print(json.dumps({"ok": False, "error": str(e)}))
+        else:
+            print(f"✗ Error: {e}")

src/praisonai/praisonai/cli/features/doctor/checks/__init__.py

@@ -19,3 +19,4 @@ def register_all_checks():
     from . import network_checks
     from . import performance_checks
     from . import selftest_checks
+    from . import serve_checks

src/praisonai/praisonai/cli/features/doctor/checks/serve_checks.py

@@ -0,0 +1,426 @@
+"""
+Doctor checks for serve and endpoints functionality.
+
+Checks for:
+- Serve module availability
+- Endpoints module availability
+- Server connectivity
+- Discovery endpoint
+- Provider types
+"""
+
+import os
+
+from ..models import CheckResult, CheckStatus, CheckCategory, CheckSeverity, DoctorConfig
+from ..registry import register_check
+
+
+@register_check(
+    id="serve_module",
+    title="Serve Module",
+    description="Check if serve module is available",
+    category=CheckCategory.ENVIRONMENT,
+    severity=CheckSeverity.MEDIUM,
+    tags=["serve", "deploy"],
+)
+def check_serve_module(config: DoctorConfig) -> CheckResult:
+    """Check if serve module is available."""
+    try:
+        from praisonai.cli.features.serve import ServeHandler
+        ServeHandler()  # Test instantiation
+        return CheckResult(
+            id="serve_module",
+            title="Serve Module",
+            category=CheckCategory.ENVIRONMENT,
+            status=CheckStatus.PASS,
+            message="Serve module available",
+            metadata={"handler": "ServeHandler"},
+        )
+    except ImportError as e:
+        return CheckResult(
+            id="serve_module",
+            title="Serve Module",
+            category=CheckCategory.ENVIRONMENT,
+            status=CheckStatus.WARN,
+            message=f"Serve module not available: {e}",
+            remediation="pip install praisonai[serve]",
+        )
+    except Exception as e:
+        return CheckResult(
+            id="serve_module",
+            title="Serve Module",
+            category=CheckCategory.ENVIRONMENT,
+            status=CheckStatus.ERROR,
+            message=f"Error checking serve module: {e}",
+        )
+
+
+@register_check(
+    id="endpoints_module",
+    title="Endpoints Module",
+    description="Check if endpoints module is available",
+    category=CheckCategory.ENVIRONMENT,
+    severity=CheckSeverity.MEDIUM,
+    tags=["endpoints", "deploy"],
+)
+def check_endpoints_module(config: DoctorConfig) -> CheckResult:
+    """Check if endpoints module is available."""
+    try:
+        from praisonai.endpoints import (
+            DiscoveryDocument,
+            EndpointInfo,
+            ProviderInfo,
+            list_provider_types,
+        )
+        types = list_provider_types()
+        return CheckResult(
+            id="endpoints_module",
+            title="Endpoints Module",
+            category=CheckCategory.ENVIRONMENT,
+            status=CheckStatus.PASS,
+            message=f"Endpoints module available ({len(types)} provider types)",
+            metadata={"provider_types": types},
+        )
+    except ImportError as e:
+        return CheckResult(
+            id="endpoints_module",
+            title="Endpoints Module",
+            category=CheckCategory.ENVIRONMENT,
+            status=CheckStatus.WARN,
+            message=f"Endpoints module not available: {e}",
+            remediation="pip install praisonai[serve]",
+        )
+    except Exception as e:
+        return CheckResult(
+            id="endpoints_module",
+            title="Endpoints Module",
+            category=CheckCategory.ENVIRONMENT,
+            status=CheckStatus.ERROR,
+            message=f"Error checking endpoints module: {e}",
+        )
+
+
+@register_check(
+    id="endpoints_cli",
+    title="Endpoints CLI",
+    description="Check if endpoints CLI handler is available",
+    category=CheckCategory.ENVIRONMENT,
+    severity=CheckSeverity.LOW,
+    tags=["endpoints", "cli"],
+)
+def check_endpoints_cli(config: DoctorConfig) -> CheckResult:
+    """Check if endpoints CLI handler is available."""
+    try:
+        from praisonai.cli.features.endpoints import EndpointsHandler
+        handler = EndpointsHandler()
+        return CheckResult(
+            id="endpoints_cli",
+            title="Endpoints CLI",
+            category=CheckCategory.ENVIRONMENT,
+            status=CheckStatus.PASS,
+            message="Endpoints CLI handler available",
+            metadata={"default_url": handler.DEFAULT_URL},
+        )
+    except ImportError as e:
+        return CheckResult(
+            id="endpoints_cli",
+            title="Endpoints CLI",
+            category=CheckCategory.ENVIRONMENT,
+            status=CheckStatus.WARN,
+            message=f"Endpoints CLI not available: {e}",
+            remediation="pip install praisonai",
+        )
+    except Exception as e:
+        return CheckResult(
+            id="endpoints_cli",
+            title="Endpoints CLI",
+            category=CheckCategory.ENVIRONMENT,
+            status=CheckStatus.ERROR,
+            message=f"Error checking endpoints CLI: {e}",
+        )
+
+
+@register_check(
+    id="server_connectivity",
+    title="Server Connectivity",
+    description="Check if a PraisonAI server is reachable",
+    category=CheckCategory.NETWORK,
+    severity=CheckSeverity.LOW,
+    requires_deep=True,
+    tags=["serve", "network"],
+)
+def check_server_connectivity(config: DoctorConfig) -> CheckResult:
+    """Check if a PraisonAI server is reachable."""
+    import urllib.request
+    import urllib.error
+    
+    url = os.environ.get("PRAISONAI_ENDPOINTS_URL", "http://localhost:8765")
+    health_url = f"{url}/health"
+    
+    try:
+        req = urllib.request.Request(health_url, method="GET")
+        with urllib.request.urlopen(req, timeout=5) as resp:
+            if resp.status == 200:
+                return CheckResult(
+                    id="server_connectivity",
+                    title="Server Connectivity",
+                    category=CheckCategory.NETWORK,
+                    status=CheckStatus.PASS,
+                    message=f"Server reachable at {url}",
+                    metadata={"url": url, "status": resp.status},
+                )
+            else:
+                return CheckResult(
+                    id="server_connectivity",
+                    title="Server Connectivity",
+                    category=CheckCategory.NETWORK,
+                    status=CheckStatus.WARN,
+                    message=f"Server returned status {resp.status}",
+                    metadata={"url": url, "status": resp.status},
+                )
+    except urllib.error.URLError as e:
+        return CheckResult(
+            id="server_connectivity",
+            title="Server Connectivity",
+            category=CheckCategory.NETWORK,
+            status=CheckStatus.SKIP,
+            message=f"No server running at {url}",
+            details=str(e.reason),
+            remediation="Start a server: praisonai serve unified --port 8765",
+        )
+    except Exception as e:
+        return CheckResult(
+            id="server_connectivity",
+            title="Server Connectivity",
+            category=CheckCategory.NETWORK,
+            status=CheckStatus.ERROR,
+            message=f"Error checking server: {e}",
+        )
+
+
+@register_check(
+    id="discovery_endpoint",
+    title="Discovery Endpoint",
+    description="Check if discovery endpoint is available",
+    category=CheckCategory.NETWORK,
+    severity=CheckSeverity.LOW,
+    requires_deep=True,
+    dependencies=["server_connectivity"],
+    tags=["serve", "discovery"],
+)
+def check_discovery_endpoint(config: DoctorConfig) -> CheckResult:
+    """Check if discovery endpoint is available."""
+    import urllib.request
+    import urllib.error
+    import json
+    
+    url = os.environ.get("PRAISONAI_ENDPOINTS_URL", "http://localhost:8765")
+    discovery_url = f"{url}/__praisonai__/discovery"
+    
+    try:
+        req = urllib.request.Request(discovery_url, method="GET")
+        with urllib.request.urlopen(req, timeout=5) as resp:
+            if resp.status == 200:
+                data = json.loads(resp.read().decode())
+                providers = data.get("providers", [])
+                endpoints = data.get("endpoints", [])
+                return CheckResult(
+                    id="discovery_endpoint",
+                    title="Discovery Endpoint",
+                    category=CheckCategory.NETWORK,
+                    status=CheckStatus.PASS,
+                    message=f"Discovery available: {len(providers)} providers, {len(endpoints)} endpoints",
+                    metadata={
+                        "url": discovery_url,
+                        "schema_version": data.get("schema_version"),
+                        "server_name": data.get("server_name"),
+                        "providers": [p.get("type") for p in providers],
+                    },
+                )
+            else:
+                return CheckResult(
+                    id="discovery_endpoint",
+                    title="Discovery Endpoint",
+                    category=CheckCategory.NETWORK,
+                    status=CheckStatus.WARN,
+                    message=f"Discovery returned status {resp.status}",
+                )
+    except urllib.error.URLError:
+        return CheckResult(
+            id="discovery_endpoint",
+            title="Discovery Endpoint",
+            category=CheckCategory.NETWORK,
+            status=CheckStatus.SKIP,
+            message="No server running (skipped)",
+        )
+    except Exception as e:
+        return CheckResult(
+            id="discovery_endpoint",
+            title="Discovery Endpoint",
+            category=CheckCategory.NETWORK,
+            status=CheckStatus.ERROR,
+            message=f"Error checking discovery: {e}",
+        )
+
+
+@register_check(
+    id="a2u_module",
+    title="A2U Module",
+    description="Check if A2U server module is available",
+    category=CheckCategory.ENVIRONMENT,
+    severity=CheckSeverity.LOW,
+    tags=["serve", "a2u"],
+)
+def check_a2u_module(config: DoctorConfig) -> CheckResult:
+    """Check if A2U server module is available."""
+    try:
+        from praisonai.endpoints.a2u_server import (
+            A2UEvent,
+            A2USubscription,
+            A2UEventBus,
+            create_a2u_routes,
+        )
+        return CheckResult(
+            id="a2u_module",
+            title="A2U Module",
+            category=CheckCategory.ENVIRONMENT,
+            status=CheckStatus.PASS,
+            message="A2U server module available",
+        )
+    except ImportError as e:
+        return CheckResult(
+            id="a2u_module",
+            title="A2U Module",
+            category=CheckCategory.ENVIRONMENT,
+            status=CheckStatus.WARN,
+            message=f"A2U module not available: {e}",
+            remediation="pip install praisonai[serve]",
+        )
+    except Exception as e:
+        return CheckResult(
+            id="a2u_module",
+            title="A2U Module",
+            category=CheckCategory.ENVIRONMENT,
+            status=CheckStatus.ERROR,
+            message=f"Error checking A2U module: {e}",
+        )
+
+
+@register_check(
+    id="provider_adapters",
+    title="Provider Adapters",
+    description="Check if all provider adapters are available",
+    category=CheckCategory.ENVIRONMENT,
+    severity=CheckSeverity.LOW,
+    tags=["serve", "providers"],
+)
+def check_provider_adapters(config: DoctorConfig) -> CheckResult:
+    """Check if all provider adapters are available."""
+    try:
+        from praisonai.endpoints.providers import (
+            BaseProvider,
+            RecipeProvider,
+            AgentsAPIProvider,
+            MCPProvider,
+            ToolsMCPProvider,
+            A2AProvider,
+            A2UProvider,
+        )
+        providers = [
+            "BaseProvider",
+            "RecipeProvider",
+            "AgentsAPIProvider",
+            "MCPProvider",
+            "ToolsMCPProvider",
+            "A2AProvider",
+            "A2UProvider",
+        ]
+        return CheckResult(
+            id="provider_adapters",
+            title="Provider Adapters",
+            category=CheckCategory.ENVIRONMENT,
+            status=CheckStatus.PASS,
+            message=f"All {len(providers)} provider adapters available",
+            metadata={"providers": providers},
+        )
+    except ImportError as e:
+        return CheckResult(
+            id="provider_adapters",
+            title="Provider Adapters",
+            category=CheckCategory.ENVIRONMENT,
+            status=CheckStatus.WARN,
+            message=f"Some provider adapters not available: {e}",
+            remediation="pip install praisonai[serve]",
+        )
+    except Exception as e:
+        return CheckResult(
+            id="provider_adapters",
+            title="Provider Adapters",
+            category=CheckCategory.ENVIRONMENT,
+            status=CheckStatus.ERROR,
+            message=f"Error checking provider adapters: {e}",
+        )
+
+
+@register_check(
+    id="fastapi_available",
+    title="FastAPI Available",
+    description="Check if FastAPI is available for serving",
+    category=CheckCategory.ENVIRONMENT,
+    severity=CheckSeverity.MEDIUM,
+    tags=["serve", "dependencies"],
+)
+def check_fastapi_available(config: DoctorConfig) -> CheckResult:
+    """Check if FastAPI is available."""
+    try:
+        import fastapi
+        version = getattr(fastapi, "__version__", "unknown")
+        return CheckResult(
+            id="fastapi_available",
+            title="FastAPI Available",
+            category=CheckCategory.ENVIRONMENT,
+            status=CheckStatus.PASS,
+            message=f"FastAPI {version} available",
+            metadata={"version": version},
+        )
+    except ImportError:
+        return CheckResult(
+            id="fastapi_available",
+            title="FastAPI Available",
+            category=CheckCategory.ENVIRONMENT,
+            status=CheckStatus.WARN,
+            message="FastAPI not installed",
+            remediation="pip install fastapi uvicorn",
+        )
+
+
+@register_check(
+    id="uvicorn_available",
+    title="Uvicorn Available",
+    description="Check if Uvicorn is available for serving",
+    category=CheckCategory.ENVIRONMENT,
+    severity=CheckSeverity.MEDIUM,
+    tags=["serve", "dependencies"],
+)
+def check_uvicorn_available(config: DoctorConfig) -> CheckResult:
+    """Check if Uvicorn is available."""
+    try:
+        import uvicorn
+        version = getattr(uvicorn, "__version__", "unknown")
+        return CheckResult(
+            id="uvicorn_available",
+            title="Uvicorn Available",
+            category=CheckCategory.ENVIRONMENT,
+            status=CheckStatus.PASS,
+            message=f"Uvicorn {version} available",
+            metadata={"version": version},
+        )
+    except ImportError:
+        return CheckResult(
+            id="uvicorn_available",
+            title="Uvicorn Available",
+            category=CheckCategory.ENVIRONMENT,
+            status=CheckStatus.WARN,
+            message="Uvicorn not installed",
+            remediation="pip install uvicorn",
+        )

src/praisonai/praisonai/cli/features/endpoints.py

@@ -1,11 +1,20 @@
 """
 Endpoints CLI Feature Handler
 
-Provides CLI commands for interacting with recipe endpoints:
-- list: List available recipe endpoints
+Provides CLI commands for interacting with PraisonAI endpoints:
+- list: List available endpoints (all provider types)
 - describe: Show endpoint details and schema
 - invoke: Call an endpoint
 - health: Check endpoint server health
+- types: List supported provider types
+
+Supported Provider Types:
+- recipe: Recipe runner endpoints
+- agents-api: Single/multi-agent HTTP API
+- mcp: MCP server (stdio, http, sse)
+- tools-mcp: Tools exposed as MCP server
+- a2a: Agent-to-agent protocol
+- a2u: Agent-to-user event stream
 
 All commands use the canonical `praisonai endpoints` prefix.
 
@@ -14,11 +23,13 @@ Why this feature is valuable:
 - Ops: Health checks, monitoring, automation
 - Polyglot: Non-Python clients can invoke recipes via HTTP
 - Testing: Easy endpoint verification without code
+- Unified: Single interface for all server types
 
 Architecture notes:
 - Optional extras only (no server deps in core)
 - Lazy imports for all HTTP client code
 - No impact on praisonaiagents import time
+- Backward compatible with existing recipe-only usage
 """
 
 import json
@@ -27,15 +38,27 @@ import sys
 from typing import Any, Dict, List, Optional
 
 
+# Supported provider types
+PROVIDER_TYPES = [
+    "recipe",
+    "agents-api",
+    "mcp",
+    "tools-mcp",
+    "a2a",
+    "a2u",
+]
+
+
 class EndpointsHandler:
     """
     CLI handler for endpoints operations.
     
     Commands:
-    - list: List available recipe endpoints
+    - list: List available endpoints (all provider types)
     - describe: Show endpoint details
     - invoke: Call an endpoint
     - health: Check server health
+    - types: List supported provider types
     """
     
     # Exit codes
@@ -90,6 +113,8 @@ class EndpointsHandler:
             "describe": self.cmd_describe,
             "invoke": self.cmd_invoke,
             "health": self.cmd_health,
+            "types": self.cmd_types,
+            "discovery": self.cmd_discovery,
             "help": lambda _: self._print_help() or self.EXIT_SUCCESS,
             "--help": lambda _: self._print_help() or self.EXIT_SUCCESS,
             "-h": lambda _: self._print_help() or self.EXIT_SUCCESS,
@@ -107,25 +132,30 @@ class EndpointsHandler:
         help_text = """
 [bold cyan]PraisonAI Endpoints[/bold cyan]
 
-Client CLI for interacting with recipe endpoints.
+Unified client CLI for interacting with PraisonAI endpoints.
 
 [bold]Usage:[/bold]
   praisonai endpoints <command> [options]
 
 [bold]Commands:[/bold]
-  list              List available recipe endpoints
-  describe <recipe> Show endpoint details and schema
-  invoke <recipe>   Call an endpoint
+  list              List available endpoints (all types)
+  describe <name>   Show endpoint details and schema
+  invoke <name>     Call an endpoint
   health            Check server health
+  types             List supported provider types
+  discovery         Show raw discovery document
+
+[bold]Global Options:[/bold]
+  --url <url>       Server URL (default: http://localhost:8765)
+  --api-key <key>   API key (or set PRAISONAI_ENDPOINTS_API_KEY)
+  --type <type>     Filter by provider type (recipe, agents-api, mcp, etc.)
 
 [bold]List Options:[/bold]
   --format json     Output as JSON
   --tags <a,b>      Filter by tags (comma-separated)
-  --url <url>       Server URL (default: http://localhost:8765)
 
 [bold]Describe Options:[/bold]
   --schema          Show input/output schema only
-  --url <url>       Server URL
 
 [bold]Invoke Options:[/bold]
   --input <path>    Input file path
@@ -133,12 +163,15 @@ Client CLI for interacting with recipe endpoints.
   --config k=v      Config override (repeatable)
   --json            Output as JSON
   --stream          Stream output events (SSE)
-  --url <url>       Server URL
-  --api-key <key>   API key for auth (or set PRAISONAI_ENDPOINTS_API_KEY)
   --dry-run         Validate without executing
 
-[bold]Health Options:[/bold]
-  --url <url>       Server URL
+[bold]Provider Types:[/bold]
+  recipe            Recipe runner endpoints
+  agents-api        Single/multi-agent HTTP API
+  mcp               MCP server (stdio, http, sse)
+  tools-mcp         Tools exposed as MCP server
+  a2a               Agent-to-agent protocol
+  a2u               Agent-to-user event stream
 
 [bold]Environment Variables:[/bold]
   PRAISONAI_ENDPOINTS_URL      Default server URL
@@ -146,14 +179,16 @@ Client CLI for interacting with recipe endpoints.
 
 [bold]Examples:[/bold]
   praisonai endpoints list
+  praisonai endpoints list --type agents-api
   praisonai endpoints list --format json --tags audio,video
-  praisonai endpoints describe ai-podcast-cleaner
-  praisonai endpoints describe ai-podcast-cleaner --schema
-  praisonai endpoints invoke ai-podcast-cleaner --input ./audio.mp3
-  praisonai endpoints invoke ai-podcast-cleaner --input-json '{"text": "hello"}'
-  praisonai endpoints invoke ai-podcast-cleaner --input ./audio.mp3 --stream
+  praisonai endpoints describe my-agent
+  praisonai endpoints describe my-agent --schema
+  praisonai endpoints invoke my-agent --input-json '{"query": "hello"}'
+  praisonai endpoints invoke my-recipe --input ./data.json --stream
   praisonai endpoints health
   praisonai endpoints health --url http://localhost:8000
+  praisonai endpoints types
+  praisonai endpoints discovery
 """
         self._print_rich(help_text)
     
@@ -339,34 +374,96 @@ Client CLI for interacting with recipe endpoints.
         except Exception as e:
             yield {"error": str(e)}
     
+    def _get_provider(self, provider_type: str, url: Optional[str] = None, api_key: Optional[str] = None):
+        """Get a provider instance."""
+        try:
+            from praisonai.endpoints import get_provider
+            return get_provider(
+                provider_type,
+                base_url=url or self.base_url,
+                api_key=api_key or self.api_key,
+            )
+        except ImportError:
+            return None
+    
+    def _try_unified_discovery(self, url: Optional[str] = None) -> Optional[Dict[str, Any]]:
+        """Try to get unified discovery document."""
+        result = self._make_request("GET", "/__praisonai__/discovery", url=url)
+        if not result.get("error") and result.get("data"):
+            return result.get("data")
+        return None
+    
     def cmd_list(self, args: List[str]) -> int:
-        """List available recipe endpoints."""
+        """List available endpoints (all provider types)."""
         spec = {
             "format": {"default": "table"},
             "tags": {"default": None},
             "url": {"default": None},
+            "type": {"default": None},
         }
         parsed = self._parse_args(args, spec)
         
-        # Build query params
-        path = "/v1/recipes"
-        if parsed["tags"]:
-            path += f"?tags={parsed['tags']}"
+        all_endpoints = []
         
-        result = self._make_request("GET", path, url=parsed["url"])
+        # Try unified discovery first
+        discovery = self._try_unified_discovery(parsed["url"])
+        if discovery:
+            endpoints = discovery.get("endpoints", [])
+            for ep in endpoints:
+                # Filter by type if specified
+                if parsed["type"] and ep.get("provider_type") != parsed["type"]:
+                    continue
+                # Filter by tags if specified
+                if parsed["tags"]:
+                    tag_list = [t.strip() for t in parsed["tags"].split(",")]
+                    ep_tags = ep.get("tags", [])
+                    if not any(t in ep_tags for t in tag_list):
+                        continue
+                all_endpoints.append(ep)
+        else:
+            # Fallback: try recipe endpoint (backward compatibility)
+            if not parsed["type"] or parsed["type"] == "recipe":
+                path = "/v1/recipes"
+                if parsed["tags"]:
+                    path += f"?tags={parsed['tags']}"
+                
+                result = self._make_request("GET", path, url=parsed["url"])
+                
+                if not result.get("error"):
+                    recipes = result.get("data", {}).get("recipes", [])
+                    for r in recipes:
+                        all_endpoints.append({
+                            "name": r.get("name", ""),
+                            "description": r.get("description", ""),
+                            "provider_type": "recipe",
+                            "version": r.get("version", "1.0.0"),
+                            "tags": r.get("tags", []),
+                            "streaming": ["none", "sse"],
+                        })
+            
+            # Try agents-api endpoint
+            if not parsed["type"] or parsed["type"] == "agents-api":
+                result = self._make_request("GET", "/", url=parsed["url"])
+                if not result.get("error"):
+                    data = result.get("data", {})
+                    for path in data.get("endpoints", []):
+                        all_endpoints.append({
+                            "name": path.lstrip("/"),
+                            "description": f"Agent endpoint at {path}",
+                            "provider_type": "agents-api",
+                            "streaming": ["none"],
+                        })
         
-        if result.get("error"):
-            self._print_error(result["error"].get("message", str(result["error"])))
-            return self.EXIT_CONNECTION_ERROR
-        
-        recipes = result.get("data", {}).get("recipes", [])
-        
-        if parsed["format"] == "json":
-            self._print_json(recipes)
+        if not all_endpoints:
+            result = self._make_request("GET", "/health", url=parsed["url"])
+            if result.get("error"):
+                self._print_error(result["error"].get("message", str(result["error"])))
+                return self.EXIT_CONNECTION_ERROR
+            print("No endpoints available.")
             return self.EXIT_SUCCESS
         
-        if not recipes:
-            print("No endpoints available.")
+        if parsed["format"] == "json":
+            self._print_json(all_endpoints)
             return self.EXIT_SUCCESS
         
         try:
@@ -376,63 +473,106 @@ Client CLI for interacting with recipe endpoints.
             console = Console()
             table = Table(title="Available Endpoints")
             table.add_column("Name", style="cyan")
-            table.add_column("Version", style="green")
+            table.add_column("Type", style="magenta")
             table.add_column("Description")
+            table.add_column("Streaming", style="green")
             table.add_column("Tags", style="yellow")
             
-            for r in recipes:
-                tags = r.get("tags", [])
+            for ep in all_endpoints:
+                tags = ep.get("tags", [])
+                streaming = ep.get("streaming", ["none"])
+                desc = ep.get("description", "")
                 table.add_row(
-                    r.get("name", ""),
-                    r.get("version", ""),
-                    (r.get("description", "")[:50] + "...") if len(r.get("description", "")) > 50 else r.get("description", ""),
+                    ep.get("name", ""),
+                    ep.get("provider_type", "unknown"),
+                    (desc[:40] + "...") if len(desc) > 40 else desc,
+                    ", ".join(streaming[:2]),
                     ", ".join(tags[:3]) if tags else "",
                 )
             
             console.print(table)
         except ImportError:
-            for r in recipes:
-                print(f"{r.get('name')} ({r.get('version')}): {r.get('description', '')}")
+            for ep in all_endpoints:
+                print(f"[{ep.get('provider_type', 'unknown')}] {ep.get('name')}: {ep.get('description', '')}")
         
         return self.EXIT_SUCCESS
     
     def cmd_describe(self, args: List[str]) -> int:
-        """Describe a recipe endpoint."""
+        """Describe an endpoint."""
         spec = {
-            "recipe": {"positional": True, "default": ""},
+            "name": {"positional": True, "default": ""},
             "schema": {"flag": True, "default": False},
             "url": {"default": None},
+            "type": {"default": None},
         }
         parsed = self._parse_args(args, spec)
         
-        if not parsed["recipe"]:
-            self._print_error("Recipe name required")
+        if not parsed["name"]:
+            self._print_error("Endpoint name required")
             return self.EXIT_VALIDATION_ERROR
         
-        # Get schema if requested
-        if parsed["schema"]:
-            path = f"/v1/recipes/{parsed['recipe']}/schema"
-        else:
-            path = f"/v1/recipes/{parsed['recipe']}"
+        endpoint_name = parsed["name"]
+        endpoint_info = None
         
-        result = self._make_request("GET", path, url=parsed["url"])
+        # Try unified discovery first
+        discovery = self._try_unified_discovery(parsed["url"])
+        if discovery:
+            for ep in discovery.get("endpoints", []):
+                if ep.get("name") == endpoint_name:
+                    if parsed["type"] and ep.get("provider_type") != parsed["type"]:
+                        continue
+                    endpoint_info = ep
+                    break
         
-        if result.get("status") == 404:
-            self._print_error(f"Endpoint not found: {parsed['recipe']}")
-            return self.EXIT_NOT_FOUND
+        if endpoint_info:
+            if parsed["schema"]:
+                schema_info = {
+                    "name": endpoint_info.get("name"),
+                    "input_schema": endpoint_info.get("input_schema"),
+                    "output_schema": endpoint_info.get("output_schema"),
+                }
+                self._print_json(schema_info)
+            else:
+                self._print_json(endpoint_info)
+            return self.EXIT_SUCCESS
         
-        if result.get("error"):
-            self._print_error(result["error"].get("message", str(result["error"])))
-            return self.EXIT_CONNECTION_ERROR
+        # Fallback: try recipe endpoint (backward compatibility)
+        if not parsed["type"] or parsed["type"] == "recipe":
+            if parsed["schema"]:
+                path = f"/v1/recipes/{endpoint_name}/schema"
+            else:
+                path = f"/v1/recipes/{endpoint_name}"
+            
+            result = self._make_request("GET", path, url=parsed["url"])
+            
+            if not result.get("error") and result.get("status") != 404:
+                data = result.get("data", {})
+                # Add provider_type for consistency
+                data["provider_type"] = "recipe"
+                self._print_json(data)
+                return self.EXIT_SUCCESS
         
-        data = result.get("data", {})
-        self._print_json(data)
-        return self.EXIT_SUCCESS
+        # Try agents-api
+        if not parsed["type"] or parsed["type"] == "agents-api":
+            # Return basic info for agent endpoints
+            endpoint_info = {
+                "name": endpoint_name,
+                "provider_type": "agents-api",
+                "description": f"Agent endpoint: {endpoint_name}",
+                "input_schema": {"type": "object", "properties": {"query": {"type": "string"}}},
+                "streaming": ["none"],
+                "auth_modes": ["none"],
+            }
+            self._print_json(endpoint_info)
+            return self.EXIT_SUCCESS
+        
+        self._print_error(f"Endpoint not found: {endpoint_name}")
+        return self.EXIT_NOT_FOUND
     
     def cmd_invoke(self, args: List[str]) -> int:
-        """Invoke a recipe endpoint."""
+        """Invoke an endpoint."""
         spec = {
-            "recipe": {"positional": True, "default": ""},
+            "name": {"positional": True, "default": ""},
             "input": {"short": "-i", "default": None},
             "input_json": {"default": None},
             "config": {"repeatable": True, "default": []},
@@ -441,13 +581,16 @@ Client CLI for interacting with recipe endpoints.
             "url": {"default": None},
             "api_key": {"default": None},
             "dry_run": {"flag": True, "default": False},
+            "type": {"default": None},
         }
         parsed = self._parse_args(args, spec)
         
-        if not parsed["recipe"]:
-            self._print_error("Recipe name required")
+        if not parsed["name"]:
+            self._print_error("Endpoint name required")
             return self.EXIT_VALIDATION_ERROR
         
+        endpoint_name = parsed["name"]
+        
         # Build input data
         input_data = {}
         if parsed["input_json"]:
@@ -457,7 +600,15 @@ Client CLI for interacting with recipe endpoints.
                 self._print_error("Invalid JSON in --input-json")
                 return self.EXIT_VALIDATION_ERROR
         elif parsed["input"]:
-            input_data = {"input": parsed["input"]}
+            # Check if input is a file path
+            if os.path.isfile(parsed["input"]):
+                try:
+                    with open(parsed["input"]) as f:
+                        input_data = json.load(f)
+                except (json.JSONDecodeError, IOError):
+                    input_data = {"input": parsed["input"]}
+            else:
+                input_data = {"input": parsed["input"]}
         
         # Build config from --config key=value pairs
         config = {}
@@ -466,9 +617,39 @@ Client CLI for interacting with recipe endpoints.
                 k, v = cfg.split("=", 1)
                 config[k] = v
         
-        # Build request body
+        # Detect provider type from discovery or explicit --type
+        provider_type = parsed["type"]
+        if not provider_type:
+            discovery = self._try_unified_discovery(parsed["url"])
+            if discovery:
+                for ep in discovery.get("endpoints", []):
+                    if ep.get("name") == endpoint_name:
+                        provider_type = ep.get("provider_type")
+                        break
+        
+        # Default to recipe for backward compatibility
+        if not provider_type:
+            provider_type = "recipe"
+        
+        # Route to appropriate invocation method
+        if provider_type == "recipe":
+            return self._invoke_recipe(endpoint_name, input_data, config, parsed)
+        elif provider_type == "agents-api":
+            return self._invoke_agents_api(endpoint_name, input_data, config, parsed)
+        elif provider_type in ("mcp", "tools-mcp"):
+            return self._invoke_mcp(endpoint_name, input_data, config, parsed)
+        elif provider_type == "a2a":
+            return self._invoke_a2a(endpoint_name, input_data, config, parsed)
+        elif provider_type == "a2u":
+            return self._invoke_a2u(endpoint_name, input_data, config, parsed)
+        else:
+            # Fallback to recipe
+            return self._invoke_recipe(endpoint_name, input_data, config, parsed)
+    
+    def _invoke_recipe(self, name: str, input_data: Dict, config: Dict, parsed: Dict) -> int:
+        """Invoke a recipe endpoint."""
         body = {
-            "recipe": parsed["recipe"],
+            "recipe": name,
             "input": input_data,
             "config": config,
             "options": {"dry_run": parsed["dry_run"]},
@@ -477,7 +658,6 @@ Client CLI for interacting with recipe endpoints.
         if parsed["stream"]:
             return self._invoke_stream(body, parsed)
         
-        # Sync invocation
         result = self._make_request(
             "POST",
             "/v1/recipes/run",
@@ -486,12 +666,31 @@ Client CLI for interacting with recipe endpoints.
             json_data=body,
         )
         
+        return self._handle_invoke_result(result, name, parsed)
+    
+    def _invoke_agents_api(self, name: str, input_data: Dict, config: Dict, parsed: Dict) -> int:
+        """Invoke an agents-api endpoint."""
+        path = name if name.startswith("/") else f"/{name}"
+        
+        # Build body - agents-api expects query field
+        body = input_data
+        if "query" not in body and config.get("query"):
+            body["query"] = config["query"]
+        
+        result = self._make_request(
+            "POST",
+            path,
+            url=parsed["url"],
+            api_key=parsed["api_key"],
+            json_data=body,
+        )
+        
         if result.get("status") == 401:
-            self._print_error("Authentication required. Use --api-key or set PRAISONAI_ENDPOINTS_API_KEY")
+            self._print_error("Authentication required")
             return self.EXIT_AUTH_ERROR
         
         if result.get("status") == 404:
-            self._print_error(f"Endpoint not found: {parsed['recipe']}")
+            self._print_error(f"Endpoint not found: {name}")
             return self.EXIT_NOT_FOUND
         
         if result.get("error"):
@@ -503,17 +702,171 @@ Client CLI for interacting with recipe endpoints.
         if parsed["json"]:
             self._print_json(data)
         else:
-            if data.get("ok"):
-                self._print_success(f"Endpoint '{parsed['recipe']}' invoked successfully")
-                print(f"  Run ID: {data.get('run_id')}")
-                print(f"  Status: {data.get('status')}")
+            response = data.get("response", data)
+            self._print_success(f"Endpoint '{name}' invoked successfully")
+            print(f"  Response: {response}")
+        
+        return self.EXIT_SUCCESS
+    
+    def _invoke_mcp(self, name: str, input_data: Dict, config: Dict, parsed: Dict) -> int:
+        """Invoke an MCP tool."""
+        body = {
+            "tool": name,
+            "arguments": input_data,
+        }
+        
+        result = self._make_request(
+            "POST",
+            "/mcp/tools/call",
+            url=parsed["url"],
+            api_key=parsed["api_key"],
+            json_data=body,
+        )
+        
+        if result.get("error"):
+            self._print_error(result["error"].get("message", str(result["error"])))
+            return self.EXIT_CONNECTION_ERROR
+        
+        data = result.get("data", {})
+        
+        if parsed["json"]:
+            self._print_json(data)
+        else:
+            self._print_success(f"Tool '{name}' invoked successfully")
+            print(f"  Result: {data.get('result', data)}")
+        
+        return self.EXIT_SUCCESS
+    
+    def _invoke_a2a(self, name: str, input_data: Dict, config: Dict, parsed: Dict) -> int:
+        """Invoke an A2A agent."""
+        import uuid
+        
+        message = input_data.get("message", input_data.get("query", ""))
+        if not message and config.get("message"):
+            message = config["message"]
+        
+        body = {
+            "jsonrpc": "2.0",
+            "method": "message/send",
+            "id": str(uuid.uuid4()),
+            "params": {
+                "message": {
+                    "role": "user",
+                    "parts": [{"type": "text", "text": message}],
+                },
+            },
+        }
+        
+        result = self._make_request(
+            "POST",
+            "/a2a",
+            url=parsed["url"],
+            api_key=parsed["api_key"],
+            json_data=body,
+        )
+        
+        if result.get("error"):
+            self._print_error(result["error"].get("message", str(result["error"])))
+            return self.EXIT_CONNECTION_ERROR
+        
+        data = result.get("data", {})
+        
+        if parsed["json"]:
+            self._print_json(data)
+        else:
+            if "result" in data:
+                self._print_success(f"A2A message sent to '{name}'")
+                print(f"  Result: {data['result']}")
+            elif "error" in data:
+                self._print_error(data["error"].get("message", str(data["error"])))
+                return self.EXIT_RUNTIME_ERROR
+        
+        return self.EXIT_SUCCESS
+    
+    def _invoke_a2u(self, name: str, input_data: Dict, config: Dict, parsed: Dict) -> int:
+        """Subscribe to an A2U event stream."""
+        if parsed["stream"]:
+            return self._stream_a2u(name, parsed)
+        
+        body = {
+            "stream": name,
+            "filters": input_data.get("filters", []),
+        }
+        
+        result = self._make_request(
+            "POST",
+            "/a2u/subscribe",
+            url=parsed["url"],
+            api_key=parsed["api_key"],
+            json_data=body,
+        )
+        
+        if result.get("error"):
+            self._print_error(result["error"].get("message", str(result["error"])))
+            return self.EXIT_CONNECTION_ERROR
+        
+        data = result.get("data", {})
+        
+        if parsed["json"]:
+            self._print_json(data)
+        else:
+            self._print_success(f"Subscribed to A2U stream '{name}'")
+            print(f"  Stream URL: {data.get('stream_url')}")
+        
+        return self.EXIT_SUCCESS
+    
+    def _stream_a2u(self, name: str, parsed: Dict) -> int:
+        """Stream A2U events."""
+        print(f"Streaming events from '{name}'...")
+        
+        for event in self._stream_request(
+            f"/a2u/events/{name}",
+            url=parsed["url"],
+            api_key=parsed["api_key"],
+        ):
+            if event.get("error"):
+                self._print_error(event["error"])
+                return self.EXIT_CONNECTION_ERROR
+            
+            if parsed["json"]:
+                print(json.dumps(event))
+            else:
+                print(f"  [{event.get('event', 'event')}] {event.get('data', '')}")
+        
+        return self.EXIT_SUCCESS
+    
+    def _handle_invoke_result(self, result: Dict, name: str, parsed: Dict) -> int:
+        """Handle common invoke result processing."""
+        if result.get("status") == 401:
+            self._print_error("Authentication required. Use --api-key or set PRAISONAI_ENDPOINTS_API_KEY")
+            return self.EXIT_AUTH_ERROR
+        
+        if result.get("status") == 404:
+            self._print_error(f"Endpoint not found: {name}")
+            return self.EXIT_NOT_FOUND
+        
+        if result.get("error"):
+            self._print_error(result["error"].get("message", str(result["error"])))
+            return self.EXIT_CONNECTION_ERROR
+        
+        data = result.get("data", {})
+        
+        if parsed["json"]:
+            self._print_json(data)
+        else:
+            if data.get("ok", True):
+                self._print_success(f"Endpoint '{name}' invoked successfully")
+                if data.get("run_id"):
+                    print(f"  Run ID: {data.get('run_id')}")
+                if data.get("status"):
+                    print(f"  Status: {data.get('status')}")
                 if data.get("output"):
                     print(f"  Output: {data.get('output')}")
             else:
                 self._print_error(f"Invocation failed: {data.get('error')}")
                 return self.EXIT_RUNTIME_ERROR
         
-        return self.EXIT_SUCCESS if data.get("ok") else self.EXIT_RUNTIME_ERROR
+        return self.EXIT_SUCCESS if data.get("ok", True) else self.EXIT_RUNTIME_ERROR
     
     def _invoke_stream(self, body: Dict, parsed: Dict) -> int:
         """Handle streaming invocation."""
@@ -551,9 +904,14 @@ Client CLI for interacting with recipe endpoints.
         """Check endpoint server health."""
         spec = {
             "url": {"default": None},
+            "type": {"default": None},
+            "format": {"default": "table"},
         }
         parsed = self._parse_args(args, spec)
         
+        # Try unified discovery first for richer info
+        discovery = self._try_unified_discovery(parsed["url"])
+        
         result = self._make_request("GET", "/health", url=parsed["url"])
         
         if result.get("error"):
@@ -562,14 +920,97 @@ Client CLI for interacting with recipe endpoints.
         
         data = result.get("data", {})
         
-        if data.get("status") == "healthy":
+        # Merge discovery info
+        if discovery:
+            data["schema_version"] = discovery.get("schema_version")
+            data["providers"] = [p.get("type") for p in discovery.get("providers", [])]
+            data["endpoint_count"] = len(discovery.get("endpoints", []))
+        
+        if parsed["format"] == "json":
+            self._print_json(data)
+            return self.EXIT_SUCCESS
+        
+        status = data.get("status", "unknown")
+        if status in ("healthy", "ok"):
             self._print_success("Server healthy")
-            print(f"  Service: {data.get('service')}")
-            print(f"  Version: {data.get('version')}")
+            if data.get("service"):
+                print(f"  Service: {data.get('service')}")
+            if data.get("server_name"):
+                print(f"  Server: {data.get('server_name')}")
+            if data.get("version"):
+                print(f"  Version: {data.get('version')}")
+            if data.get("schema_version"):
+                print(f"  Schema Version: {data.get('schema_version')}")
+            if data.get("providers"):
+                print(f"  Providers: {', '.join(data.get('providers'))}")
+            if data.get("endpoint_count"):
+                print(f"  Endpoints: {data.get('endpoint_count')}")
+            if data.get("endpoints"):
+                print(f"  Endpoints: {', '.join(data.get('endpoints')[:5])}")
             return self.EXIT_SUCCESS
         else:
             self._print_error(f"Server unhealthy: {data}")
             return self.EXIT_RUNTIME_ERROR
+    
+    def cmd_types(self, args: List[str]) -> int:
+        """List supported provider types."""
+        spec = {
+            "format": {"default": "table"},
+        }
+        parsed = self._parse_args(args, spec)
+        
+        types_info = [
+            {"type": "recipe", "description": "Recipe runner endpoints", "capabilities": ["list", "describe", "invoke", "stream"]},
+            {"type": "agents-api", "description": "Single/multi-agent HTTP API", "capabilities": ["list", "describe", "invoke"]},
+            {"type": "mcp", "description": "MCP server (stdio, http, sse)", "capabilities": ["list-tools", "call-tool"]},
+            {"type": "tools-mcp", "description": "Tools exposed as MCP server", "capabilities": ["list-tools", "call-tool"]},
+            {"type": "a2a", "description": "Agent-to-agent protocol", "capabilities": ["agent-card", "message-send", "stream"]},
+            {"type": "a2u", "description": "Agent-to-user event stream", "capabilities": ["subscribe", "stream"]},
+        ]
+        
+        if parsed["format"] == "json":
+            self._print_json(types_info)
+            return self.EXIT_SUCCESS
+        
+        try:
+            from rich.console import Console
+            from rich.table import Table
+            
+            console = Console()
+            table = Table(title="Supported Provider Types")
+            table.add_column("Type", style="cyan")
+            table.add_column("Description")
+            table.add_column("Capabilities", style="green")
+            
+            for t in types_info:
+                table.add_row(
+                    t["type"],
+                    t["description"],
+                    ", ".join(t["capabilities"]),
+                )
+            
+            console.print(table)
+        except ImportError:
+            for t in types_info:
+                print(f"{t['type']}: {t['description']}")
+        
+        return self.EXIT_SUCCESS
+    
+    def cmd_discovery(self, args: List[str]) -> int:
+        """Show raw discovery document."""
+        spec = {
+            "url": {"default": None},
+        }
+        parsed = self._parse_args(args, spec)
+        
+        discovery = self._try_unified_discovery(parsed["url"])
+        
+        if discovery:
+            self._print_json(discovery)
+            return self.EXIT_SUCCESS
+        
+        self._print_error("Discovery endpoint not available at this server")
+        return self.EXIT_NOT_FOUND
 
 
 def handle_endpoints_command(args: List[str]) -> int:

src/praisonai/praisonai/cli/features/jobs.py

@@ -53,11 +53,14 @@ class JobsHandler:
         self,
         prompt: str,
         agent_file: Optional[str] = None,
+        recipe_name: Optional[str] = None,
+        recipe_config: Optional[dict] = None,
         framework: str = "praisonai",
         timeout: int = 3600,
         wait: bool = False,
         poll_interval: int = 5,
         idempotency_key: Optional[str] = None,
+        idempotency_scope: str = "none",
         webhook_url: Optional[str] = None,
         session_id: Optional[str] = None,
         output_json: bool = False
@@ -68,14 +71,25 @@ class JobsHandler:
         Args:
             prompt: The prompt/task for the agent
             agent_file: Optional path to agents.yaml
+            recipe_name: Optional recipe name (mutually exclusive with agent_file)
+            recipe_config: Optional recipe configuration overrides
             framework: Framework to use
             timeout: Job timeout in seconds
             wait: If True, wait for completion
             poll_interval: Seconds between status polls
+            idempotency_key: Key for deduplication
+            idempotency_scope: Scope for deduplication (none, session, global)
+            webhook_url: URL for completion webhook
+            session_id: Session ID for conversation continuity
+            output_json: If True, output JSON format
             
         Returns:
             Job submission response
         """
+        # Validate mutually exclusive options
+        if agent_file and recipe_name:
+            raise ValueError("Cannot specify both --agent-file and --recipe. Choose one.")
+        
         client = self._get_client()
         
         payload = {
@@ -86,12 +100,18 @@ class JobsHandler:
         
         if agent_file:
             payload["agent_file"] = agent_file
+        if recipe_name:
+            payload["recipe_name"] = recipe_name
+        if recipe_config:
+            payload["recipe_config"] = recipe_config
         if webhook_url:
             payload["webhook_url"] = webhook_url
         if session_id:
             payload["session_id"] = session_id
         if idempotency_key:
             payload["idempotency_key"] = idempotency_key
+        if idempotency_scope and idempotency_scope != "none":
+            payload["idempotency_scope"] = idempotency_scope
         
         headers = {}
         if idempotency_key:
@@ -494,12 +514,17 @@ def handle_run_command(args: List[str], verbose: bool = False):
     submit_parser = subparsers.add_parser("submit", help="Submit a new job")
     submit_parser.add_argument("prompt", help="The prompt/task for the agent")
     submit_parser.add_argument("--agent-file", help="Path to agents.yaml")
+    submit_parser.add_argument("--recipe", dest="recipe_name", help="Recipe name to execute (mutually exclusive with --agent-file)")
+    submit_parser.add_argument("--recipe-config", help="Recipe config as JSON string")
     submit_parser.add_argument("--framework", default="praisonai", help="Framework to use")
     submit_parser.add_argument("--timeout", type=int, default=3600, help="Timeout in seconds")
     submit_parser.add_argument("--wait", action="store_true", help="Wait for completion")
+    submit_parser.add_argument("--stream", action="store_true", help="Stream job progress after submission")
     submit_parser.add_argument("--idempotency-key", help="Idempotency key to prevent duplicates")
+    submit_parser.add_argument("--idempotency-scope", default="none", choices=["none", "session", "global"], help="Idempotency scope")
     submit_parser.add_argument("--webhook-url", help="Webhook URL for completion callback")
     submit_parser.add_argument("--session-id", help="Session ID for grouping jobs")
+    submit_parser.add_argument("--metadata", action="append", metavar="KEY=VALUE", help="Custom metadata (can be used multiple times)")
     submit_parser.add_argument("--json", dest="output_json", action="store_true", help="Output JSON for scripting")
     submit_parser.add_argument("--api-url", default="http://127.0.0.1:8005", help="API server URL")
     
@@ -552,13 +577,25 @@ def handle_run_command(args: List[str], verbose: bool = False):
     
     try:
         if parsed.subcommand == "submit":
+            # Parse recipe config if provided
+            recipe_config = None
+            if getattr(parsed, "recipe_config", None):
+                try:
+                    recipe_config = json.loads(parsed.recipe_config)
+                except json.JSONDecodeError:
+                    print("Error: --recipe-config must be valid JSON")
+                    sys.exit(1)
+            
             handler.submit(
                 prompt=parsed.prompt,
                 agent_file=parsed.agent_file,
+                recipe_name=getattr(parsed, "recipe_name", None),
+                recipe_config=recipe_config,
                 framework=parsed.framework,
                 timeout=parsed.timeout,
                 wait=parsed.wait,
                 idempotency_key=getattr(parsed, "idempotency_key", None),
+                idempotency_scope=getattr(parsed, "idempotency_scope", "none"),
                 webhook_url=getattr(parsed, "webhook_url", None),
                 session_id=getattr(parsed, "session_id", None),
                 output_json=getattr(parsed, "output_json", False)

src/praisonai/praisonai/cli/features/package.py

@@ -0,0 +1,631 @@
+"""
+Package CLI Feature Handler
+
+Provides pip-like CLI commands for package management:
+- install: Install Python packages
+- uninstall: Uninstall Python packages
+- list: List installed packages
+- search: Search packages
+- index: Manage package indexes
+
+All commands use the canonical `praisonai` or `praisonai package` prefix.
+
+Security:
+- Default to single authoritative index (PyPI)
+- Warn loudly about dependency confusion when using extra indexes
+- Require explicit opt-in for extra index fallback
+"""
+
+import json
+import os
+import subprocess
+import sys
+from pathlib import Path
+from typing import Any, Dict, List, Tuple
+
+
+# Default configuration
+DEFAULT_INDEX_URL = "https://pypi.org/simple"
+CONFIG_DIR = Path.home() / ".praison"
+CONFIG_FILE = CONFIG_DIR / "config.toml"
+
+
+class PackageConfig:
+    """Package configuration manager."""
+    
+    def __init__(self):
+        """Initialize config."""
+        self._config = None
+    
+    def _load_config(self) -> Dict[str, Any]:
+        """Load configuration from file."""
+        if self._config is not None:
+            return self._config
+        
+        self._config = {
+            "package": {
+                "index_url": DEFAULT_INDEX_URL,
+                "extra_index_urls": [],
+                "allow_extra_index": False,
+                "trusted_hosts": [],
+            }
+        }
+        
+        if CONFIG_FILE.exists():
+            try:
+                import tomllib
+            except ImportError:
+                try:
+                    import tomli as tomllib
+                except ImportError:
+                    return self._config
+            
+            try:
+                with open(CONFIG_FILE, "rb") as f:
+                    file_config = tomllib.load(f)
+                    if "package" in file_config:
+                        self._config["package"].update(file_config["package"])
+            except Exception:
+                pass
+        
+        # Environment variable overrides
+        if os.environ.get("PRAISONAI_PACKAGE_INDEX_URL"):
+            self._config["package"]["index_url"] = os.environ["PRAISONAI_PACKAGE_INDEX_URL"]
+        
+        if os.environ.get("PRAISONAI_PACKAGE_EXTRA_INDEX_URLS"):
+            urls = os.environ["PRAISONAI_PACKAGE_EXTRA_INDEX_URLS"].split(",")
+            self._config["package"]["extra_index_urls"] = [u.strip() for u in urls if u.strip()]
+        
+        return self._config
+    
+    def get(self, key: str, default: Any = None) -> Any:
+        """Get config value."""
+        config = self._load_config()
+        parts = key.split(".")
+        value = config
+        for part in parts:
+            if isinstance(value, dict) and part in value:
+                value = value[part]
+            else:
+                return default
+        return value
+    
+    def save_index(self, index_url: str) -> None:
+        """Save index URL to config."""
+        CONFIG_DIR.mkdir(parents=True, exist_ok=True)
+        
+        config = {}
+        if CONFIG_FILE.exists():
+            try:
+                import tomllib
+            except ImportError:
+                try:
+                    import tomli as tomllib
+                except ImportError:
+                    # Fall back to simple write
+                    with open(CONFIG_FILE, "w") as f:
+                        f.write(f'[package]\nindex_url = "{index_url}"\n')
+                    return
+            
+            try:
+                with open(CONFIG_FILE, "rb") as f:
+                    config = tomllib.load(f)
+            except Exception:
+                pass
+        
+        if "package" not in config:
+            config["package"] = {}
+        config["package"]["index_url"] = index_url
+        
+        # Write config (simple TOML format)
+        with open(CONFIG_FILE, "w") as f:
+            for section, values in config.items():
+                f.write(f"[{section}]\n")
+                for key, value in values.items():
+                    if isinstance(value, str):
+                        f.write(f'{key} = "{value}"\n')
+                    elif isinstance(value, bool):
+                        f.write(f'{key} = {"true" if value else "false"}\n')
+                    elif isinstance(value, list):
+                        f.write(f'{key} = {json.dumps(value)}\n')
+                    else:
+                        f.write(f'{key} = {value}\n')
+                f.write("\n")
+
+
+class PackageHandler:
+    """
+    CLI handler for package operations.
+    
+    Commands:
+    - install: Install Python packages
+    - uninstall: Uninstall Python packages
+    - list: List installed packages
+    - search: Search packages (best-effort)
+    - index: Manage package indexes
+    """
+    
+    # Stable exit codes
+    EXIT_SUCCESS = 0
+    EXIT_GENERAL_ERROR = 1
+    EXIT_VALIDATION_ERROR = 2
+    EXIT_NETWORK_ERROR = 10
+    EXIT_DEPENDENCY_ERROR = 11
+    
+    def __init__(self):
+        """Initialize the handler."""
+        self.config = PackageConfig()
+    
+    def handle(self, args: List[str]) -> int:
+        """
+        Handle package subcommand.
+        
+        Args:
+            args: Command arguments
+            
+        Returns:
+            Exit code
+        """
+        if not args:
+            self._print_help()
+            return self.EXIT_SUCCESS
+        
+        command = args[0]
+        remaining = args[1:]
+        
+        commands = {
+            "list": self.cmd_list,
+            "search": self.cmd_search,
+            "index": self.cmd_index,
+            "help": lambda _: self._print_help() or self.EXIT_SUCCESS,
+            "--help": lambda _: self._print_help() or self.EXIT_SUCCESS,
+            "-h": lambda _: self._print_help() or self.EXIT_SUCCESS,
+        }
+        
+        handler = commands.get(command)
+        if handler:
+            return handler(remaining)
+        
+        self._print_error(f"Unknown command: {command}")
+        self._print_help()
+        return self.EXIT_VALIDATION_ERROR
+    
+    def _print_help(self):
+        """Print help message."""
+        print("""
+PraisonAI Package Commands
+
+Usage: praisonai package <command> [options]
+       praisonai install <spec...>
+       praisonai uninstall <pkg...>
+
+Commands:
+  install     Install Python packages (shortcut: praisonai install)
+  uninstall   Uninstall Python packages (shortcut: praisonai uninstall)
+  list        List installed packages
+  search      Search for packages
+  index       Manage package indexes
+
+Examples:
+  praisonai install requests
+  praisonai install "requests>=2.28" httpx
+  praisonai uninstall requests
+  praisonai package list
+  praisonai package search langchain
+  praisonai package index show
+  praisonai package index set https://my-index.example.com/simple
+
+Options for 'install':
+  --index-url URL       Use custom index URL
+  --extra-index-url URL Add extra index (requires --allow-extra-index)
+  --allow-extra-index   Allow extra index URLs (security risk!)
+  --python PATH         Python interpreter to use
+  --upgrade, -U         Upgrade packages
+  --no-deps             Don't install dependencies
+  --json                Output in JSON format
+
+Options for 'uninstall':
+  --python PATH         Python interpreter to use
+  --yes, -y             Don't ask for confirmation
+  --json                Output in JSON format
+
+Security Notes:
+  - By default, only the primary index is used (PyPI)
+  - Using --extra-index-url can lead to dependency confusion attacks
+  - Always prefer --index-url over --extra-index-url when possible
+""")
+    
+    def _print_error(self, message: str):
+        """Print error message."""
+        print(f"Error: {message}", file=sys.stderr)
+    
+    def _print_warning(self, message: str):
+        """Print warning message."""
+        print(f"Warning: {message}", file=sys.stderr)
+    
+    def _print_success(self, message: str):
+        """Print success message."""
+        print(f"✓ {message}")
+    
+    def _print_json(self, data: Any):
+        """Print JSON output."""
+        print(json.dumps(data, indent=2))
+    
+    def _parse_args(self, args: List[str], spec: Dict[str, Any]) -> Tuple[Dict[str, Any], List[str]]:
+        """Parse command arguments, returning parsed args and positional args."""
+        result = {k: v.get("default") for k, v in spec.items()}
+        positional = []
+        
+        i = 0
+        while i < len(args):
+            arg = args[i]
+            
+            if arg.startswith("--"):
+                key = arg[2:].replace("-", "_")
+                if key in spec:
+                    if spec[key].get("flag"):
+                        result[key] = True
+                    elif i + 1 < len(args):
+                        result[key] = args[i + 1]
+                        i += 1
+                else:
+                    positional.append(arg)
+            elif arg.startswith("-") and len(arg) == 2:
+                # Short flag
+                found = False
+                for key, val in spec.items():
+                    if val.get("short") == arg:
+                        if val.get("flag"):
+                            result[key] = True
+                        elif i + 1 < len(args):
+                            result[key] = args[i + 1]
+                            i += 1
+                        found = True
+                        break
+                if not found:
+                    positional.append(arg)
+            else:
+                positional.append(arg)
+            i += 1
+        
+        return result, positional
+    
+    def _get_python(self, python_path: str = None) -> str:
+        """Get Python interpreter path."""
+        if python_path:
+            return python_path
+        return sys.executable
+    
+    def _run_pip(
+        self,
+        args: List[str],
+        python: str = None,
+        capture: bool = False,
+    ) -> Tuple[int, str, str]:
+        """
+        Run pip command.
+        
+        Args:
+            args: pip arguments
+            python: Python interpreter path
+            capture: Capture output instead of streaming
+            
+        Returns:
+            Tuple of (return_code, stdout, stderr)
+        """
+        python = self._get_python(python)
+        cmd = [python, "-m", "pip"] + args
+        
+        if capture:
+            result = subprocess.run(
+                cmd,
+                capture_output=True,
+                text=True,
+                env={**os.environ, "PAGER": "cat"},
+            )
+            return result.returncode, result.stdout, result.stderr
+        else:
+            result = subprocess.run(
+                cmd,
+                env={**os.environ, "PAGER": "cat"},
+            )
+            return result.returncode, "", ""
+    
+    def cmd_install(self, args: List[str]) -> int:
+        """Install Python packages."""
+        spec = {
+            "index_url": {"default": None},
+            "extra_index_url": {"default": None},
+            "allow_extra_index": {"flag": True, "default": False},
+            "python": {"default": None},
+            "upgrade": {"flag": True, "short": "-U", "default": False},
+            "no_deps": {"flag": True, "default": False},
+            "json": {"flag": True, "default": False},
+        }
+        parsed, packages = self._parse_args(args, spec)
+        
+        if not packages:
+            self._print_error("No packages specified")
+            return self.EXIT_VALIDATION_ERROR
+        
+        # Build pip command
+        pip_args = ["install"]
+        
+        # Index URL
+        index_url = parsed["index_url"] or self.config.get("package.index_url", DEFAULT_INDEX_URL)
+        pip_args.extend(["--index-url", index_url])
+        
+        # Extra index URL (with security warning)
+        extra_index = parsed["extra_index_url"]
+        if extra_index:
+            allow_extra = parsed["allow_extra_index"] or self.config.get("package.allow_extra_index", False)
+            if not allow_extra:
+                self._print_error(
+                    "Extra index URLs are disabled by default for security.\n"
+                    "Using multiple indexes can lead to dependency confusion attacks.\n"
+                    "To enable, use --allow-extra-index flag or set package.allow_extra_index=true in config."
+                )
+                return self.EXIT_VALIDATION_ERROR
+            
+            self._print_warning(
+                "⚠️  SECURITY WARNING: Using extra index URLs can lead to dependency confusion attacks!\n"
+                "   An attacker could publish a malicious package with the same name on PyPI.\n"
+                "   Only use this if you trust both indexes and understand the risks."
+            )
+            pip_args.extend(["--extra-index-url", extra_index])
+        
+        # Other options
+        if parsed["upgrade"]:
+            pip_args.append("--upgrade")
+        if parsed["no_deps"]:
+            pip_args.append("--no-deps")
+        
+        # Add packages
+        pip_args.extend(packages)
+        
+        if parsed["json"]:
+            returncode, stdout, stderr = self._run_pip(pip_args, parsed["python"], capture=True)
+            self._print_json({
+                "ok": returncode == 0,
+                "packages": packages,
+                "returncode": returncode,
+                "stdout": stdout,
+                "stderr": stderr,
+            })
+            return returncode
+        else:
+            print(f"Installing: {', '.join(packages)}")
+            returncode, _, _ = self._run_pip(pip_args, parsed["python"])
+            if returncode == 0:
+                self._print_success("Installation complete")
+            return returncode
+    
+    def cmd_uninstall(self, args: List[str]) -> int:
+        """Uninstall Python packages."""
+        spec = {
+            "python": {"default": None},
+            "yes": {"flag": True, "short": "-y", "default": False},
+            "json": {"flag": True, "default": False},
+        }
+        parsed, packages = self._parse_args(args, spec)
+        
+        if not packages:
+            self._print_error("No packages specified")
+            return self.EXIT_VALIDATION_ERROR
+        
+        pip_args = ["uninstall"]
+        if parsed["yes"]:
+            pip_args.append("-y")
+        pip_args.extend(packages)
+        
+        if parsed["json"]:
+            returncode, stdout, stderr = self._run_pip(pip_args, parsed["python"], capture=True)
+            self._print_json({
+                "ok": returncode == 0,
+                "packages": packages,
+                "returncode": returncode,
+                "stdout": stdout,
+                "stderr": stderr,
+            })
+            return returncode
+        else:
+            print(f"Uninstalling: {', '.join(packages)}")
+            returncode, _, _ = self._run_pip(pip_args, parsed["python"])
+            if returncode == 0:
+                self._print_success("Uninstall complete")
+            return returncode
+    
+    def cmd_list(self, args: List[str]) -> int:
+        """List installed packages."""
+        spec = {
+            "python": {"default": None},
+            "json": {"flag": True, "default": False},
+            "outdated": {"flag": True, "default": False},
+        }
+        parsed, _ = self._parse_args(args, spec)
+        
+        pip_args = ["list", "--format=json"]
+        if parsed["outdated"]:
+            pip_args.append("--outdated")
+        
+        returncode, stdout, stderr = self._run_pip(pip_args, parsed["python"], capture=True)
+        
+        if returncode != 0:
+            self._print_error(stderr or "Failed to list packages")
+            return returncode
+        
+        try:
+            packages = json.loads(stdout)
+        except json.JSONDecodeError:
+            packages = []
+        
+        if parsed["json"]:
+            self._print_json({
+                "ok": True,
+                "packages": packages,
+                "count": len(packages),
+            })
+        else:
+            if not packages:
+                print("No packages installed.")
+            else:
+                print(f"{'Package':<30} {'Version':<15}")
+                print("-" * 45)
+                for pkg in packages:
+                    name = pkg.get("name", "")
+                    version = pkg.get("version", "")
+                    print(f"{name:<30} {version:<15}")
+                print(f"\nTotal: {len(packages)} packages")
+        
+        return self.EXIT_SUCCESS
+    
+    def cmd_search(self, args: List[str]) -> int:
+        """Search for packages (best-effort, uses pip search or PyPI API)."""
+        spec = {
+            "json": {"flag": True, "default": False},
+        }
+        parsed, query_parts = self._parse_args(args, spec)
+        
+        if not query_parts:
+            self._print_error("Search query required")
+            return self.EXIT_VALIDATION_ERROR
+        
+        query = " ".join(query_parts)
+        
+        # pip search is deprecated, use PyPI JSON API
+        try:
+            import urllib.request
+            import urllib.error
+            
+            url = f"https://pypi.org/pypi/{query}/json"
+            try:
+                with urllib.request.urlopen(url, timeout=10) as response:
+                    data = json.loads(response.read().decode())
+                    
+                    info = data.get("info", {})
+                    result = {
+                        "name": info.get("name"),
+                        "version": info.get("version"),
+                        "summary": info.get("summary"),
+                        "author": info.get("author"),
+                        "home_page": info.get("home_page"),
+                    }
+                    
+                    if parsed["json"]:
+                        self._print_json({"ok": True, "results": [result]})
+                    else:
+                        print(f"Found: {result['name']} ({result['version']})")
+                        print(f"  {result['summary']}")
+                        if result['home_page']:
+                            print(f"  Homepage: {result['home_page']}")
+                    
+                    return self.EXIT_SUCCESS
+                    
+            except urllib.error.HTTPError as e:
+                if e.code == 404:
+                    if parsed["json"]:
+                        self._print_json({"ok": True, "results": [], "message": "No exact match found"})
+                    else:
+                        print(f"No exact match for '{query}'")
+                        print("Try: pip search <query> (if available) or browse https://pypi.org")
+                    return self.EXIT_SUCCESS
+                raise
+                
+        except Exception as e:
+            if parsed["json"]:
+                self._print_json({"ok": False, "error": str(e)})
+            else:
+                self._print_error(f"Search failed: {e}")
+            return self.EXIT_NETWORK_ERROR
+    
+    def cmd_index(self, args: List[str]) -> int:
+        """Manage package indexes."""
+        if not args:
+            return self._index_show([])
+        
+        subcommand = args[0]
+        remaining = args[1:]
+        
+        subcommands = {
+            "show": self._index_show,
+            "set": self._index_set,
+            "add": self._index_add,
+            "remove": self._index_remove,
+        }
+        
+        handler = subcommands.get(subcommand)
+        if handler:
+            return handler(remaining)
+        
+        self._print_error(f"Unknown index subcommand: {subcommand}")
+        return self.EXIT_VALIDATION_ERROR
+    
+    def _index_show(self, args: List[str]) -> int:
+        """Show current index configuration."""
+        spec = {
+            "json": {"flag": True, "default": False},
+        }
+        parsed, _ = self._parse_args(args, spec)
+        
+        index_url = self.config.get("package.index_url", DEFAULT_INDEX_URL)
+        extra_urls = self.config.get("package.extra_index_urls", [])
+        allow_extra = self.config.get("package.allow_extra_index", False)
+        
+        if parsed["json"]:
+            self._print_json({
+                "ok": True,
+                "index_url": index_url,
+                "extra_index_urls": extra_urls,
+                "allow_extra_index": allow_extra,
+            })
+        else:
+            print(f"Primary Index: {index_url}")
+            if extra_urls:
+                print(f"Extra Indexes: {', '.join(extra_urls)}")
+            print(f"Allow Extra Index: {'yes' if allow_extra else 'no'}")
+        
+        return self.EXIT_SUCCESS
+    
+    def _index_set(self, args: List[str]) -> int:
+        """Set primary index URL."""
+        if not args:
+            self._print_error("Index URL required")
+            return self.EXIT_VALIDATION_ERROR
+        
+        url = args[0]
+        
+        # Validate URL format
+        if not url.startswith(("http://", "https://")):
+            self._print_error("Index URL must start with http:// or https://")
+            return self.EXIT_VALIDATION_ERROR
+        
+        self.config.save_index(url)
+        self._print_success(f"Primary index set to: {url}")
+        
+        return self.EXIT_SUCCESS
+    
+    def _index_add(self, args: List[str]) -> int:
+        """Add extra index URL."""
+        self._print_warning(
+            "Adding extra index URLs is a security risk!\n"
+            "This can lead to dependency confusion attacks.\n"
+            "Consider using --index-url to switch indexes instead."
+        )
+        
+        if not args:
+            self._print_error("Index URL required")
+            return self.EXIT_VALIDATION_ERROR
+        
+        # For now, just print instructions
+        print("\nTo use extra index, run:")
+        print(f"  praisonai install <pkg> --extra-index-url {args[0]} --allow-extra-index")
+        
+        return self.EXIT_SUCCESS
+    
+    def _index_remove(self, args: List[str]) -> int:
+        """Remove extra index URL."""
+        print("Extra index URLs are not persisted by default.")
+        print("To reset to PyPI, run:")
+        print(f"  praisonai package index set {DEFAULT_INDEX_URL}")
+        
+        return self.EXIT_SUCCESS

src/praisonai/praisonai/cli/features/recipe.py

@@ -255,12 +255,62 @@ class RecipeHandler:
         spec = {
             "source": {"default": None},
             "tags": {"default": None},
+            "registry": {"default": None},
+            "token": {"default": None},
             "json": {"flag": True, "default": False},
             "offline": {"flag": True, "default": False},
         }
         parsed = self._parse_args(args, spec)
         
         try:
+            # If registry URL provided, list from that registry
+            if parsed["registry"]:
+                from praisonai.recipe.registry import get_registry
+                import os
+                registry = get_registry(
+                    registry=parsed["registry"],
+                    token=parsed["token"] or os.environ.get("PRAISONAI_REGISTRY_TOKEN")
+                )
+                result = registry.list_recipes(
+                    tags=parsed["tags"].split(",") if parsed["tags"] else None
+                )
+                recipes = result.get("recipes", []) if isinstance(result, dict) else result
+                
+                if parsed["json"]:
+                    self._print_json(recipes)
+                    return self.EXIT_SUCCESS
+                
+                if not recipes:
+                    print("No recipes found in registry.")
+                    return self.EXIT_SUCCESS
+                
+                try:
+                    from rich.console import Console
+                    from rich.table import Table
+                    
+                    console = Console()
+                    table = Table(title=f"Recipes from {parsed['registry']}")
+                    table.add_column("Name", style="cyan")
+                    table.add_column("Version", style="green")
+                    table.add_column("Description")
+                    table.add_column("Tags", style="yellow")
+                    
+                    for r in recipes:
+                        table.add_row(
+                            r.get("name", ""),
+                            r.get("version", ""),
+                            (r.get("description", "")[:50] + "...") if len(r.get("description", "")) > 50 else r.get("description", ""),
+                            ", ".join(r.get("tags", [])[:3]),
+                        )
+                    
+                    console.print(table)
+                except ImportError:
+                    for r in recipes:
+                        print(f"{r.get('name')} ({r.get('version')}): {r.get('description', '')}")
+                
+                return self.EXIT_SUCCESS
+            
+            # Default: list local recipes
             recipes = self.recipe.list_recipes(
                 source_filter=parsed["source"],
                 tags=parsed["tags"].split(",") if parsed["tags"] else None,
@@ -309,6 +359,8 @@ class RecipeHandler:
         """Search recipes by query."""
         spec = {
             "query": {"positional": True, "default": ""},
+            "registry": {"default": None},
+            "token": {"default": None},
             "json": {"flag": True, "default": False},
             "offline": {"flag": True, "default": False},
         }
@@ -319,6 +371,32 @@ class RecipeHandler:
             return self.EXIT_VALIDATION_ERROR
         
         try:
+            # If registry URL provided, search that registry
+            if parsed["registry"]:
+                from praisonai.recipe.registry import get_registry
+                import os
+                registry = get_registry(
+                    registry=parsed["registry"],
+                    token=parsed["token"] or os.environ.get("PRAISONAI_REGISTRY_TOKEN")
+                )
+                result = registry.search(parsed["query"])
+                matches = result.get("results", []) if isinstance(result, dict) else result
+                
+                if parsed["json"]:
+                    self._print_json(matches)
+                    return self.EXIT_SUCCESS
+                
+                if not matches:
+                    print(f"No recipes found matching '{parsed['query']}' in registry")
+                    return self.EXIT_SUCCESS
+                
+                print(f"Found {len(matches)} recipe(s) matching '{parsed['query']}':")
+                for r in matches:
+                    print(f"  {r.get('name')}: {r.get('description', '')}")
+                
+                return self.EXIT_SUCCESS
+            
+            # Default: search local recipes
             recipes = self.recipe.list_recipes(offline=parsed["offline"])
             query = parsed["query"].lower()
             
@@ -473,6 +551,7 @@ class RecipeHandler:
             "session": {"short": "-s", "default": None},
             "json": {"flag": True, "default": False},
             "stream": {"flag": True, "default": False},
+            "background": {"flag": True, "default": False},
             "dry_run": {"flag": True, "default": False},
             "explain": {"flag": True, "default": False},
             "verbose": {"short": "-v", "flag": True, "default": False},
@@ -531,6 +610,13 @@ class RecipeHandler:
         }
         
         try:
+            # Background execution mode
+            if parsed["background"]:
+                return self._run_background(
+                    parsed["recipe"], input_data, config,
+                    parsed["session"], options, parsed["json"]
+                )
+            
             if parsed["stream"]:
                 return self._run_stream(
                     parsed["recipe"], input_data, config,
@@ -578,6 +664,50 @@ class RecipeHandler:
                 self._print_error(str(e))
             return self.EXIT_RUNTIME_ERROR
     
+    def _run_background(
+        self,
+        recipe_name: str,
+        input_data: Dict[str, Any],
+        config: Dict[str, Any],
+        session_id: Optional[str],
+        options: Dict[str, Any],
+        json_output: bool,
+    ) -> int:
+        """Run recipe as a background task."""
+        try:
+            from praisonai.recipe.operations import run_background
+            
+            task = run_background(
+                recipe_name,
+                input=input_data or None,
+                config=config or None,
+                session_id=session_id,
+                timeout_sec=options.get('timeout_sec', 300),
+            )
+            
+            if json_output:
+                self._print_json({
+                    "ok": True,
+                    "task_id": task.task_id,
+                    "recipe": task.recipe_name,
+                    "session_id": task.session_id,
+                    "message": "Task submitted to background"
+                })
+            else:
+                self._print_success(f"Recipe '{recipe_name}' submitted to background")
+                print(f"  Task ID: {task.task_id}")
+                print(f"  Session: {task.session_id}")
+                print(f"\nCheck status with: praisonai background status {task.task_id}")
+            
+            return self.EXIT_SUCCESS
+            
+        except Exception as e:
+            if json_output:
+                self._print_json({"ok": False, "error": str(e)})
+            else:
+                self._print_error(f"Failed to submit background task: {e}")
+            return self.EXIT_RUNTIME_ERROR
+    
     def _run_stream(
         self,
         recipe_name: str,
@@ -1040,6 +1170,12 @@ OPENAI_API_KEY=your-api-key
             "recipes": {"default": None},
             "config": {"default": None},
             "api_key": {"default": None},
+            "workers": {"default": "1"},
+            "rate_limit": {"default": None},
+            "max_request_size": {"default": None},
+            "enable_metrics": {"flag": True, "default": False},
+            "enable_admin": {"flag": True, "default": False},
+            "trace_exporter": {"default": "none"},
         }
         parsed = self._parse_args(args, spec)
         
@@ -1057,6 +1193,7 @@ OPENAI_API_KEY=your-api-key
         port = int(parsed["port"]) if parsed["port"] != "8765" or "port" not in config else config.get("port", 8765)
         host = parsed["host"] if parsed["host"] != "127.0.0.1" or "host" not in config else config.get("host", "127.0.0.1")
         auth = parsed["auth"] if parsed["auth"] != "none" or "auth" not in config else config.get("auth", "none")
+        workers = int(parsed["workers"]) if parsed["workers"] != "1" or "workers" not in config else config.get("workers", 1)
         
         # Update config with CLI overrides
         config["auth"] = auth
@@ -1064,6 +1201,16 @@ OPENAI_API_KEY=your-api-key
             config["api_key"] = parsed["api_key"]
         if parsed["recipes"]:
             config["recipes"] = parsed["recipes"].split(",")
+        if parsed["rate_limit"]:
+            config["rate_limit"] = int(parsed["rate_limit"])
+        if parsed["max_request_size"]:
+            config["max_request_size"] = int(parsed["max_request_size"])
+        if parsed["enable_metrics"]:
+            config["enable_metrics"] = True
+        if parsed["enable_admin"]:
+            config["enable_admin"] = True
+        if parsed["trace_exporter"] != "none":
+            config["trace_exporter"] = parsed["trace_exporter"]
         
         # Safety check: require auth for non-localhost
         if host != "127.0.0.1" and host != "localhost" and auth == "none":
@@ -1074,15 +1221,22 @@ OPENAI_API_KEY=your-api-key
             from praisonai.recipe.serve import serve
             
             print(f"Starting Recipe Runner on http://{host}:{port}")
+            if workers > 1:
+                print(f"Workers: {workers}")
             if auth != "none":
                 print(f"Auth: {auth}")
             print("Press Ctrl+C to stop")
             print("\nEndpoints:")
-            print("  GET  /health           - Health check")
-            print("  GET  /v1/recipes       - List recipes")
-            print("  GET  /v1/recipes/{name} - Describe recipe")
-            print("  POST /v1/recipes/run   - Run recipe")
-            print("  POST /v1/recipes/stream - Stream recipe")
+            print("  GET  /health              - Health check")
+            print("  GET  /v1/recipes          - List recipes")
+            print("  GET  /v1/recipes/{name}   - Describe recipe")
+            print("  POST /v1/recipes/run      - Run recipe")
+            print("  POST /v1/recipes/stream   - Stream recipe")
+            print("  GET  /openapi.json        - OpenAPI spec")
+            if config.get("enable_metrics"):
+                print("  GET  /metrics             - Prometheus metrics")
+            if config.get("enable_admin"):
+                print("  POST /admin/reload        - Hot reload registry")
             
             # Preload recipes if requested
             if parsed["preload"]:
@@ -1091,7 +1245,7 @@ OPENAI_API_KEY=your-api-key
                 recipes = recipe.list_recipes()
                 print(f"  Loaded {len(recipes)} recipes")
             
-            serve(host=host, port=port, reload=parsed["reload"], config=config)
+            serve(host=host, port=port, reload=parsed["reload"], config=config, workers=workers)
             
             return self.EXIT_SUCCESS
             

src/praisonai/praisonai/cli/features/recipes.py

@@ -0,0 +1,449 @@
+"""
+Recipes CLI - Commands for managing and running Agent-Recipes.
+
+Provides commands for:
+- praison recipes list - List available recipes
+- praison recipes info <name> - Show recipe details
+- praison recipes run <name> <input> - Run a recipe
+- praison recipes doctor <name> - Check recipe dependencies
+- praison recipes explain <name> - Show recipe execution plan
+- praison recipes init <name> - Initialize recipe in current directory
+"""
+
+import os
+import sys
+import json
+import yaml
+import argparse
+import logging
+from pathlib import Path
+from typing import Optional, List, Dict, Any
+
+logger = logging.getLogger(__name__)
+
+# Recipe discovery paths in order of precedence
+RECIPE_PATHS = [
+    Path.home() / ".praison" / "templates",
+    Path.home() / ".config" / "praison" / "templates",
+    Path.cwd() / ".praison" / "templates",
+    Path("/Users/praison/Agent-Recipes/agent_recipes/templates"),
+]
+
+
+def find_recipe_paths() -> List[Path]:
+    """Find all valid recipe directories."""
+    paths = []
+    for p in RECIPE_PATHS:
+        if p.exists() and p.is_dir():
+            paths.append(p)
+    return paths
+
+
+def list_recipes() -> List[Dict[str, Any]]:
+    """List all available recipes."""
+    recipes = []
+    seen = set()
+    
+    for base_path in find_recipe_paths():
+        for recipe_dir in base_path.iterdir():
+            if not recipe_dir.is_dir():
+                continue
+            
+            template_file = recipe_dir / "TEMPLATE.yaml"
+            if not template_file.exists():
+                continue
+            
+            name = recipe_dir.name
+            if name in seen:
+                continue
+            seen.add(name)
+            
+            try:
+                with open(template_file) as f:
+                    template = yaml.safe_load(f)
+                recipes.append({
+                    "name": name,
+                    "description": template.get("description", ""),
+                    "version": template.get("version", "1.0.0"),
+                    "tags": template.get("tags", []),
+                    "path": str(recipe_dir),
+                })
+            except Exception as e:
+                logger.warning(f"Failed to load recipe {name}: {e}")
+    
+    return sorted(recipes, key=lambda x: x["name"])
+
+
+def get_recipe(name: str) -> Optional[Dict[str, Any]]:
+    """Get recipe by name."""
+    for base_path in find_recipe_paths():
+        recipe_dir = base_path / name
+        template_file = recipe_dir / "TEMPLATE.yaml"
+        
+        if template_file.exists():
+            with open(template_file) as f:
+                template = yaml.safe_load(f)
+            template["path"] = str(recipe_dir)
+            return template
+    
+    return None
+
+
+def check_dependencies(recipe: Dict[str, Any]) -> Dict[str, bool]:
+    """Check if recipe dependencies are satisfied."""
+    results = {}
+    requires = recipe.get("requires", {})
+    
+    # Check environment variables
+    for env_var in requires.get("env", []):
+        results[f"env:{env_var}"] = bool(os.environ.get(env_var))
+    
+    # Check Python packages
+    for package in requires.get("packages", []):
+        try:
+            __import__(package.replace("-", "_").split("[")[0])
+            results[f"package:{package}"] = True
+        except ImportError:
+            results[f"package:{package}"] = False
+    
+    # Check external tools
+    import shutil
+    for tool in requires.get("external", []):
+        results[f"external:{tool}"] = shutil.which(tool) is not None
+    
+    # Check recipe tools
+    for tool in requires.get("tools", []):
+        try:
+            from praisonai_tools.recipe_tools import __all__ as available_tools
+            # Check if tool class exists
+            tool_class = tool.replace("_tool", "").title() + "Tool"
+            results[f"tool:{tool}"] = tool_class in available_tools or tool in str(available_tools)
+        except ImportError:
+            results[f"tool:{tool}"] = False
+    
+    return results
+
+
+def cmd_list(args: argparse.Namespace) -> int:
+    """List available recipes."""
+    recipes = list_recipes()
+    
+    if args.json:
+        print(json.dumps(recipes, indent=2))
+        return 0
+    
+    if not recipes:
+        print("No recipes found.")
+        return 0
+    
+    # Group by first tag if available
+    if args.group:
+        groups = {}
+        for r in recipes:
+            tag = r["tags"][0] if r["tags"] else "other"
+            if tag not in groups:
+                groups[tag] = []
+            groups[tag].append(r)
+        
+        for group, group_recipes in sorted(groups.items()):
+            print(f"\n{group.upper()}:")
+            for r in group_recipes:
+                print(f"  {r['name']:<35} {r['description'][:50]}")
+    else:
+        print(f"{'Recipe':<35} {'Description':<50} {'Version'}")
+        print("-" * 95)
+        for r in recipes:
+            desc = r["description"][:47] + "..." if len(r["description"]) > 50 else r["description"]
+            print(f"{r['name']:<35} {desc:<50} {r['version']}")
+    
+    print(f"\nTotal: {len(recipes)} recipes")
+    return 0
+
+
+def cmd_info(args: argparse.Namespace) -> int:
+    """Show recipe details."""
+    recipe = get_recipe(args.name)
+    
+    if not recipe:
+        print(f"Recipe not found: {args.name}")
+        return 1
+    
+    if args.json:
+        print(json.dumps(recipe, indent=2, default=str))
+        return 0
+    
+    print(f"Name: {recipe.get('name', args.name)}")
+    print(f"Version: {recipe.get('version', '1.0.0')}")
+    print(f"Description: {recipe.get('description', '')}")
+    print(f"Author: {recipe.get('author', 'unknown')}")
+    print(f"License: {recipe.get('license', 'unknown')}")
+    print(f"Path: {recipe.get('path', '')}")
+    
+    if recipe.get("tags"):
+        print(f"Tags: {', '.join(recipe['tags'])}")
+    
+    requires = recipe.get("requires", {})
+    if requires:
+        print("\nRequirements:")
+        if requires.get("env"):
+            print(f"  Environment: {', '.join(requires['env'])}")
+        if requires.get("packages"):
+            print(f"  Packages: {', '.join(requires['packages'])}")
+        if requires.get("external"):
+            print(f"  External: {', '.join(requires['external'])}")
+        if requires.get("tools"):
+            print(f"  Tools: {', '.join(requires['tools'])}")
+    
+    cli = recipe.get("cli", {})
+    if cli:
+        print("\nCLI:")
+        print(f"  Command: {cli.get('command', '')}")
+        if cli.get("examples"):
+            print("  Examples:")
+            for ex in cli["examples"]:
+                print(f"    {ex}")
+    
+    safety = recipe.get("safety", {})
+    if safety:
+        print("\nSafety:")
+        print(f"  Dry-run default: {safety.get('dry_run_default', False)}")
+        if safety.get("requires_consent"):
+            print(f"  Requires consent: {safety.get('consent_message', 'Yes')}")
+        if safety.get("legal_disclaimer"):
+            print(f"  Legal disclaimer: {safety.get('legal_disclaimer')}")
+    
+    return 0
+
+
+def cmd_doctor(args: argparse.Namespace) -> int:
+    """Check recipe dependencies."""
+    recipe = get_recipe(args.name)
+    
+    if not recipe:
+        print(f"Recipe not found: {args.name}")
+        return 1
+    
+    print(f"Checking dependencies for: {args.name}")
+    print("-" * 50)
+    
+    deps = check_dependencies(recipe)
+    all_ok = True
+    
+    for dep, status in sorted(deps.items()):
+        icon = "✓" if status else "✗"
+        color = "\033[92m" if status else "\033[91m"
+        reset = "\033[0m"
+        print(f"  {color}{icon}{reset} {dep}")
+        if not status:
+            all_ok = False
+    
+    print("-" * 50)
+    if all_ok:
+        print("All dependencies satisfied!")
+        return 0
+    else:
+        print("\nMissing dependencies. Install with:")
+        requires = recipe.get("requires", {})
+        
+        if requires.get("packages"):
+            missing_pkgs = [p for p in requires["packages"] if not deps.get(f"package:{p}", True)]
+            if missing_pkgs:
+                print(f"  pip install {' '.join(missing_pkgs)}")
+        
+        if requires.get("external"):
+            missing_ext = [e for e in requires["external"] if not deps.get(f"external:{e}", True)]
+            if missing_ext:
+                print(f"  # Install external tools: {', '.join(missing_ext)}")
+        
+        if requires.get("env"):
+            missing_env = [e for e in requires["env"] if not deps.get(f"env:{e}", True)]
+            if missing_env:
+                print(f"  # Set environment variables: {', '.join(missing_env)}")
+        
+        return 1
+
+
+def cmd_run(args: argparse.Namespace) -> int:
+    """Run a recipe."""
+    recipe = get_recipe(args.name)
+    
+    if not recipe:
+        print(f"Recipe not found: {args.name}")
+        return 1
+    
+    # Check safety requirements
+    safety = recipe.get("safety", {})
+    
+    if safety.get("requires_consent") and not args.consent:
+        print(f"This recipe requires consent: {safety.get('consent_message', '')}")
+        print("Use --consent flag to acknowledge.")
+        return 1
+    
+    if safety.get("legal_disclaimer"):
+        print(f"LEGAL DISCLAIMER: {safety['legal_disclaimer']}")
+    
+    # Check dependencies
+    if not args.skip_checks:
+        deps = check_dependencies(recipe)
+        missing = [k for k, v in deps.items() if not v]
+        if missing:
+            print(f"Missing dependencies: {', '.join(missing)}")
+            print("Run 'praison recipes doctor {args.name}' for details.")
+            if not args.force:
+                return 1
+    
+    # Dry run mode
+    if args.dry_run or (safety.get("dry_run_default") and not args.write):
+        print(f"DRY RUN: Would execute recipe '{args.name}'")
+        print(f"  Input: {args.input}")
+        print(f"  Output: {args.output or 'default'}")
+        print("\nUse --write to execute.")
+        return 0
+    
+    # Execute recipe
+    print(f"Running recipe: {args.name}")
+    print(f"Input: {args.input}")
+    
+    # TODO: Implement actual recipe execution via praisonaiagents
+    # For now, show what would be executed
+    print("\nRecipe execution would involve:")
+    for tool in recipe.get("requires", {}).get("tools", []):
+        print(f"  - Using {tool}")
+    
+    print("\nRecipe execution completed (placeholder).")
+    return 0
+
+
+def cmd_explain(args: argparse.Namespace) -> int:
+    """Explain recipe execution plan."""
+    recipe = get_recipe(args.name)
+    
+    if not recipe:
+        print(f"Recipe not found: {args.name}")
+        return 1
+    
+    print(f"Execution Plan for: {args.name}")
+    print("=" * 50)
+    
+    print("\n1. Dependency Check:")
+    for tool in recipe.get("requires", {}).get("tools", []):
+        print(f"   - Load {tool}")
+    
+    print("\n2. Input Processing:")
+    inputs = recipe.get("inputs", {})
+    for name, spec in inputs.items():
+        print(f"   - {name}: {spec.get('type', 'unknown')}")
+    
+    print("\n3. Execution:")
+    print(f"   - Run recipe workflow")
+    
+    print("\n4. Output:")
+    outputs = recipe.get("outputs", {})
+    for name, spec in outputs.items():
+        print(f"   - {name}: {spec.get('type', 'unknown')}")
+    
+    return 0
+
+
+def cmd_init(args: argparse.Namespace) -> int:
+    """Initialize recipe in current directory."""
+    recipe = get_recipe(args.name)
+    
+    if not recipe:
+        print(f"Recipe not found: {args.name}")
+        return 1
+    
+    target_dir = Path(args.output) if args.output else Path.cwd() / args.name
+    
+    if target_dir.exists() and not args.force:
+        print(f"Directory already exists: {target_dir}")
+        print("Use --force to overwrite.")
+        return 1
+    
+    import shutil
+    source_dir = Path(recipe["path"])
+    
+    if args.dry_run:
+        print(f"DRY RUN: Would copy {source_dir} to {target_dir}")
+        return 0
+    
+    target_dir.mkdir(parents=True, exist_ok=True)
+    
+    # Copy recipe files
+    for item in source_dir.iterdir():
+        if item.is_file():
+            shutil.copy2(item, target_dir / item.name)
+    
+    print(f"Initialized recipe '{args.name}' in {target_dir}")
+    return 0
+
+
+def setup_parser(subparsers: argparse._SubParsersAction) -> None:
+    """Setup recipes subcommand parser."""
+    recipes_parser = subparsers.add_parser(
+        "recipes",
+        help="Manage and run Agent-Recipes",
+        description="Commands for managing and running Agent-Recipes templates.",
+    )
+    
+    recipes_subparsers = recipes_parser.add_subparsers(dest="recipes_command")
+    
+    # List command
+    list_parser = recipes_subparsers.add_parser("list", help="List available recipes")
+    list_parser.add_argument("--json", action="store_true", help="Output as JSON")
+    list_parser.add_argument("--group", action="store_true", help="Group by category")
+    list_parser.set_defaults(func=cmd_list)
+    
+    # Info command
+    info_parser = recipes_subparsers.add_parser("info", help="Show recipe details")
+    info_parser.add_argument("name", help="Recipe name")
+    info_parser.add_argument("--json", action="store_true", help="Output as JSON")
+    info_parser.set_defaults(func=cmd_info)
+    
+    # Doctor command
+    doctor_parser = recipes_subparsers.add_parser("doctor", help="Check recipe dependencies")
+    doctor_parser.add_argument("name", help="Recipe name")
+    doctor_parser.set_defaults(func=cmd_doctor)
+    
+    # Run command
+    run_parser = recipes_subparsers.add_parser("run", help="Run a recipe")
+    run_parser.add_argument("name", help="Recipe name")
+    run_parser.add_argument("input", nargs="?", help="Input file or value")
+    run_parser.add_argument("--output", "-o", help="Output directory")
+    run_parser.add_argument("--dry-run", action="store_true", help="Show what would be done")
+    run_parser.add_argument("--write", action="store_true", help="Actually execute (for dry-run-default recipes)")
+    run_parser.add_argument("--force", action="store_true", help="Force execution despite missing deps")
+    run_parser.add_argument("--consent", action="store_true", help="Acknowledge consent requirements")
+    run_parser.add_argument("--skip-checks", action="store_true", help="Skip dependency checks")
+    run_parser.add_argument("--json", action="store_true", help="Output as JSON")
+    run_parser.set_defaults(func=cmd_run)
+    
+    # Explain command
+    explain_parser = recipes_subparsers.add_parser("explain", help="Explain recipe execution plan")
+    explain_parser.add_argument("name", help="Recipe name")
+    explain_parser.set_defaults(func=cmd_explain)
+    
+    # Init command
+    init_parser = recipes_subparsers.add_parser("init", help="Initialize recipe in directory")
+    init_parser.add_argument("name", help="Recipe name")
+    init_parser.add_argument("--output", "-o", help="Target directory")
+    init_parser.add_argument("--force", action="store_true", help="Overwrite existing")
+    init_parser.add_argument("--dry-run", action="store_true", help="Show what would be done")
+    init_parser.set_defaults(func=cmd_init)
+
+
+def handle_recipes_command(args: argparse.Namespace) -> int:
+    """Handle recipes subcommand."""
+    if not hasattr(args, "func"):
+        # No subcommand specified, show help
+        print("Usage: praison recipes <command> [options]")
+        print("\nCommands:")
+        print("  list     List available recipes")
+        print("  info     Show recipe details")
+        print("  doctor   Check recipe dependencies")
+        print("  run      Run a recipe")
+        print("  explain  Explain recipe execution plan")
+        print("  init     Initialize recipe in directory")
+        return 0
+    
+    return args.func(args)

src/praisonai/praisonai/cli/features/registry.py

@@ -0,0 +1,229 @@
+"""
+Registry CLI Feature Handler
+
+Provides CLI commands for recipe registry management:
+- serve: Start local HTTP registry server
+- status: Check registry status
+
+All commands use the canonical `praisonai registry` prefix.
+"""
+
+import os
+import sys
+from pathlib import Path
+from typing import Any, Dict, List
+
+
+class RegistryHandler:
+    """
+    CLI handler for registry operations.
+    
+    Commands:
+    - serve: Start local HTTP registry server
+    - status: Check registry server status
+    """
+    
+    # Stable exit codes
+    EXIT_SUCCESS = 0
+    EXIT_GENERAL_ERROR = 1
+    EXIT_VALIDATION_ERROR = 2
+    EXIT_NETWORK_ERROR = 10
+    EXIT_AUTH_ERROR = 9
+    
+    def __init__(self):
+        """Initialize the handler."""
+        pass
+    
+    def handle(self, args: List[str]) -> int:
+        """
+        Handle registry subcommand.
+        
+        Args:
+            args: Command arguments
+            
+        Returns:
+            Exit code
+        """
+        if not args:
+            self._print_help()
+            return self.EXIT_SUCCESS
+        
+        command = args[0]
+        remaining = args[1:]
+        
+        commands = {
+            "serve": self.cmd_serve,
+            "status": self.cmd_status,
+            "help": lambda _: self._print_help() or self.EXIT_SUCCESS,
+            "--help": lambda _: self._print_help() or self.EXIT_SUCCESS,
+            "-h": lambda _: self._print_help() or self.EXIT_SUCCESS,
+        }
+        
+        handler = commands.get(command)
+        if handler:
+            return handler(remaining)
+        
+        self._print_error(f"Unknown command: {command}")
+        self._print_help()
+        return self.EXIT_VALIDATION_ERROR
+    
+    def _print_help(self):
+        """Print help message."""
+        print("""
+PraisonAI Registry Commands
+
+Usage: praisonai registry <command> [options]
+
+Commands:
+  serve     Start local HTTP registry server
+  status    Check registry server status
+
+Examples:
+  praisonai registry serve
+  praisonai registry serve --port 7777 --token mysecret
+  praisonai registry serve --read-only
+  praisonai registry status --registry http://localhost:7777
+
+Options for 'serve':
+  --host HOST       Host to bind to (default: 127.0.0.1)
+  --port PORT       Port to bind to (default: 7777)
+  --dir PATH        Registry directory (default: ~/.praison/registry)
+  --token TOKEN     Require token for write operations
+  --read-only       Disable all write operations
+  --json            Output in JSON format
+
+Options for 'status':
+  --registry URL    Registry URL to check (default: http://localhost:7777)
+  --json            Output in JSON format
+""")
+    
+    def _print_error(self, message: str):
+        """Print error message."""
+        print(f"Error: {message}", file=sys.stderr)
+    
+    def _print_success(self, message: str):
+        """Print success message."""
+        print(f"✓ {message}")
+    
+    def _print_json(self, data: Any):
+        """Print JSON output."""
+        import json
+        print(json.dumps(data, indent=2))
+    
+    def _parse_args(self, args: List[str], spec: Dict[str, Any]) -> Dict[str, Any]:
+        """Parse command arguments based on spec."""
+        result = {k: v.get("default") for k, v in spec.items()}
+        
+        i = 0
+        while i < len(args):
+            arg = args[i]
+            
+            if arg.startswith("--"):
+                key = arg[2:].replace("-", "_")
+                if key in spec:
+                    if spec[key].get("flag"):
+                        result[key] = True
+                    elif i + 1 < len(args):
+                        result[key] = args[i + 1]
+                        i += 1
+            elif arg.startswith("-") and len(arg) == 2:
+                # Short flag
+                for key, val in spec.items():
+                    if val.get("short") == arg:
+                        if val.get("flag"):
+                            result[key] = True
+                        elif i + 1 < len(args):
+                            result[key] = args[i + 1]
+                            i += 1
+                        break
+            i += 1
+        
+        return result
+    
+    def cmd_serve(self, args: List[str]) -> int:
+        """Start local HTTP registry server."""
+        spec = {
+            "host": {"default": "127.0.0.1"},
+            "port": {"default": "7777"},
+            "dir": {"default": None},
+            "token": {"default": None},
+            "read_only": {"flag": True, "default": False},
+            "json": {"flag": True, "default": False},
+        }
+        parsed = self._parse_args(args, spec)
+        
+        try:
+            from praisonai.recipe.server import run_server
+            from praisonai.recipe.registry import DEFAULT_REGISTRY_PATH
+            
+            host = parsed["host"]
+            port = int(parsed["port"])
+            registry_path = Path(parsed["dir"]) if parsed["dir"] else DEFAULT_REGISTRY_PATH
+            token = parsed["token"] or os.environ.get("PRAISONAI_REGISTRY_TOKEN")
+            read_only = parsed["read_only"]
+            
+            if parsed["json"]:
+                self._print_json({
+                    "ok": True,
+                    "message": "Starting registry server",
+                    "host": host,
+                    "port": port,
+                    "registry_path": str(registry_path),
+                    "read_only": read_only,
+                    "auth_required": bool(token),
+                })
+            
+            run_server(
+                host=host,
+                port=port,
+                registry_path=registry_path,
+                token=token,
+                read_only=read_only,
+            )
+            
+            return self.EXIT_SUCCESS
+            
+        except KeyboardInterrupt:
+            print("\nServer stopped.")
+            return self.EXIT_SUCCESS
+        except Exception as e:
+            self._print_error(str(e))
+            return self.EXIT_GENERAL_ERROR
+    
+    def cmd_status(self, args: List[str]) -> int:
+        """Check registry server status."""
+        spec = {
+            "registry": {"default": "http://localhost:7777"},
+            "json": {"flag": True, "default": False},
+        }
+        parsed = self._parse_args(args, spec)
+        
+        try:
+            from praisonai.recipe.registry import HttpRegistry
+            
+            registry = HttpRegistry(parsed["registry"])
+            health = registry.health()
+            
+            if parsed["json"]:
+                self._print_json(health)
+            else:
+                status = "healthy" if health.get("ok") else "unhealthy"
+                print(f"Registry: {parsed['registry']}")
+                print(f"Status: {status}")
+                if health.get("read_only"):
+                    print("Mode: read-only")
+                if health.get("auth_required"):
+                    print("Auth: required for writes")
+            
+            return self.EXIT_SUCCESS
+            
+        except Exception as e:
+            if parsed["json"]:
+                self._print_json({
+                    "ok": False,
+                    "error": str(e),
+                    "registry": parsed["registry"],
+                })
+            else:
+                self._print_error(f"Cannot connect to registry: {e}")
+            return self.EXIT_NETWORK_ERROR

src/praisonai/praisonai/cli/features/serve.py

@@ -0,0 +1,812 @@
+"""
+Serve CLI Feature Handler
+
+Provides CLI commands for launching PraisonAI servers:
+- praisonai serve agents - Launch agents as HTTP API
+- praisonai serve recipe - Launch recipe runner
+- praisonai serve mcp - Launch MCP server
+- praisonai serve tools - Launch tools as MCP server
+- praisonai serve a2a - Launch A2A server
+- praisonai serve a2u - Launch A2U event stream server
+- praisonai serve unified - Launch unified server with all providers
+
+All servers include the unified discovery endpoint at /__praisonai__/discovery.
+"""
+
+import os
+import sys
+from typing import Any, Dict, List
+
+
+class ServeHandler:
+    """
+    CLI handler for serve operations.
+    
+    Commands:
+    - agents: Launch agents as HTTP API
+    - recipe: Launch recipe runner
+    - mcp: Launch MCP server
+    - tools: Launch tools as MCP server
+    - a2a: Launch A2A server
+    - a2u: Launch A2U event stream server
+    - unified: Launch unified server
+    """
+    
+    EXIT_SUCCESS = 0
+    EXIT_GENERAL_ERROR = 1
+    EXIT_VALIDATION_ERROR = 2
+    
+    DEFAULT_HOST = "127.0.0.1"
+    DEFAULT_PORT = 8765
+    
+    def __init__(self):
+        """Initialize the handler."""
+        pass
+    
+    def handle(self, args: List[str]) -> int:
+        """
+        Handle serve subcommand.
+        
+        Args:
+            args: Command arguments
+            
+        Returns:
+            Exit code
+        """
+        if not args:
+            self._print_help()
+            return self.EXIT_SUCCESS
+        
+        command = args[0]
+        remaining = args[1:]
+        
+        commands = {
+            "agents": self.cmd_agents,
+            "recipe": self.cmd_recipe,
+            "mcp": self.cmd_mcp,
+            "tools": self.cmd_tools,
+            "a2a": self.cmd_a2a,
+            "a2u": self.cmd_a2u,
+            "unified": self.cmd_unified,
+            "help": lambda _: self._print_help() or self.EXIT_SUCCESS,
+            "--help": lambda _: self._print_help() or self.EXIT_SUCCESS,
+            "-h": lambda _: self._print_help() or self.EXIT_SUCCESS,
+        }
+        
+        if command in commands:
+            return commands[command](remaining)
+        else:
+            self._print_error(f"Unknown command: {command}")
+            self._print_help()
+            return self.EXIT_GENERAL_ERROR
+    
+    def _print_help(self):
+        """Print help message."""
+        help_text = """
+[bold cyan]PraisonAI Serve[/bold cyan]
+
+Launch PraisonAI servers with unified discovery support.
+
+[bold]Usage:[/bold]
+  praisonai serve <command> [options]
+
+[bold]Commands:[/bold]
+  agents            Launch agents as HTTP API
+  recipe            Launch recipe runner server
+  mcp               Launch MCP server (HTTP mode)
+  tools             Launch tools as MCP server
+  a2a               Launch A2A protocol server
+  a2u               Launch A2U event stream server
+  unified           Launch unified server with all providers
+
+[bold]Common Options:[/bold]
+  --host <host>     Server host (default: 127.0.0.1)
+  --port <port>     Server port (default: 8765)
+  --reload          Enable hot reload
+  --api-key <key>   API key for authentication
+
+[bold]Agents Options:[/bold]
+  --file <path>     Agents YAML file (default: agents.yaml)
+  --path <path>     API endpoint path (default: /agents)
+
+[bold]Recipe Options:[/bold]
+  --config <path>   Config file path (serve.yaml)
+  --preload         Preload all recipes
+
+[bold]MCP Options:[/bold]
+  --transport       Transport type: http, sse (default: http)
+
+[bold]Examples:[/bold]
+  praisonai serve agents --file agents.yaml --port 8000
+  praisonai serve recipe --port 8765
+  praisonai serve mcp --transport http --port 8080
+  praisonai serve tools --port 8081
+  praisonai serve a2a --port 8082
+  praisonai serve unified --port 8765
+
+[bold]Discovery:[/bold]
+  All servers expose /__praisonai__/discovery for unified endpoint discovery.
+  Use `praisonai endpoints` to interact with any server.
+"""
+        self._print_rich(help_text)
+    
+    def _print_rich(self, text: str):
+        """Print with rich formatting if available."""
+        try:
+            from rich import print as rprint
+            rprint(text)
+        except ImportError:
+            import re
+            plain = re.sub(r'\[/?[^\]]+\]', '', text)
+            print(plain)
+    
+    def _print_error(self, message: str):
+        """Print error message."""
+        try:
+            from rich import print as rprint
+            rprint(f"[red]Error: {message}[/red]")
+        except ImportError:
+            print(f"Error: {message}", file=sys.stderr)
+    
+    def _print_success(self, message: str):
+        """Print success message."""
+        try:
+            from rich import print as rprint
+            rprint(f"[green]✓ {message}[/green]")
+        except ImportError:
+            print(f"✓ {message}")
+    
+    def _parse_args(self, args: List[str], spec: Dict[str, Any]) -> Dict[str, Any]:
+        """Parse command arguments based on spec."""
+        result = {k: v.get("default") for k, v in spec.items()}
+        
+        i = 0
+        while i < len(args):
+            arg = args[i]
+            
+            if arg.startswith("--"):
+                key = arg[2:].replace("-", "_")
+                if key in spec:
+                    if spec[key].get("flag"):
+                        result[key] = True
+                    elif i + 1 < len(args):
+                        value = args[i + 1]
+                        # Type conversion
+                        if spec[key].get("type") == "int":
+                            value = int(value)
+                        result[key] = value
+                        i += 1
+                i += 1
+            else:
+                i += 1
+        
+        return result
+    
+    def cmd_agents(self, args: List[str]) -> int:
+        """Launch agents as HTTP API."""
+        spec = {
+            "file": {"default": "agents.yaml"},
+            "host": {"default": self.DEFAULT_HOST},
+            "port": {"default": self.DEFAULT_PORT, "type": "int"},
+            "path": {"default": "/agents"},
+            "reload": {"flag": True, "default": False},
+            "api_key": {"default": None},
+        }
+        parsed = self._parse_args(args, spec)
+        
+        # Check if agents file exists
+        if not os.path.exists(parsed["file"]):
+            self._print_error(f"Agents file not found: {parsed['file']}")
+            return self.EXIT_VALIDATION_ERROR
+        
+        try:
+            self._print_success(f"Starting agents server on {parsed['host']}:{parsed['port']}")
+            print(f"  Agents file: {parsed['file']}")
+            print(f"  Endpoint: {parsed['path']}")
+            print("  Discovery: /__praisonai__/discovery")
+            
+            # Create and run server
+            app = self._create_agents_app(parsed)
+            self._run_server(app, parsed["host"], parsed["port"], parsed["reload"])
+            
+        except ImportError as e:
+            self._print_error(f"Missing dependency: {e}")
+            print("Install with: pip install praisonai[serve]")
+            return self.EXIT_GENERAL_ERROR
+        except Exception as e:
+            self._print_error(str(e))
+            return self.EXIT_GENERAL_ERROR
+        
+        return self.EXIT_SUCCESS
+    
+    def _create_agents_app(self, config: Dict[str, Any]) -> Any:
+        """Create FastAPI app for agents."""
+        from fastapi import FastAPI, HTTPException, Request
+        from fastapi.responses import JSONResponse
+        from pydantic import BaseModel
+        
+        from praisonai.endpoints.discovery import (
+            create_discovery_document,
+            EndpointInfo,
+            ProviderInfo,
+        )
+        from praisonai.endpoints.server import add_discovery_routes
+        
+        # Load agents from YAML
+        import yaml
+        with open(config["file"]) as f:
+            _ = yaml.safe_load(f)  # Validate YAML
+        
+        # Create discovery document
+        discovery = create_discovery_document(server_name="praisonai-agents")
+        discovery.add_provider(ProviderInfo(
+            type="agents-api",
+            name="Agents API",
+            description="Agent HTTP API endpoints",
+            capabilities=["invoke", "health"],
+        ))
+        
+        # Create app
+        app = FastAPI(
+            title="PraisonAI Agents API",
+            description="HTTP API for PraisonAI Agents",
+        )
+        
+        # Add discovery routes
+        add_discovery_routes(app, discovery)
+        
+        # Request model
+        class AgentQuery(BaseModel):
+            query: str
+        
+        # Create endpoint for agents
+        path = config["path"]
+        
+        @app.post(path)
+        async def invoke_agents(request: Request, query_data: AgentQuery = None):
+            """Invoke agents with a query."""
+            if query_data is None:
+                try:
+                    body = await request.json()
+                    _ = body.get("query", "")  # Extract query
+                except Exception:
+                    raise HTTPException(status_code=400, detail="Invalid request")
+            
+            try:
+                # Lazy load and run agents
+                from praisonai.agents_generator import AgentsGenerator
+                
+                generator = AgentsGenerator(
+                    agent_file=config["file"],
+                    framework="praisonai",
+                )
+                result = generator.generate_crew_and_kickoff()
+                
+                return {"response": result}
+            except Exception as e:
+                return JSONResponse(
+                    {"error": str(e)},
+                    status_code=500,
+                )
+        
+        # Add endpoint to discovery
+        discovery.add_endpoint(EndpointInfo(
+            name=path.lstrip("/"),
+            description="Invoke agents workflow",
+            provider_type="agents-api",
+            input_schema={"type": "object", "properties": {"query": {"type": "string"}}},
+            streaming=["none"],
+        ))
+        
+        # Root endpoint
+        @app.get("/")
+        async def root():
+            return {
+                "message": "PraisonAI Agents API",
+                "endpoints": [path],
+                "discovery": "/__praisonai__/discovery",
+            }
+        
+        return app
+    
+    def cmd_recipe(self, args: List[str]) -> int:
+        """Launch recipe runner server."""
+        spec = {
+            "host": {"default": self.DEFAULT_HOST},
+            "port": {"default": self.DEFAULT_PORT, "type": "int"},
+            "config": {"default": None},
+            "reload": {"flag": True, "default": False},
+            "api_key": {"default": None},
+            "preload": {"flag": True, "default": False},
+        }
+        parsed = self._parse_args(args, spec)
+        
+        try:
+            self._print_success(f"Starting recipe server on {parsed['host']}:{parsed['port']}")
+            print("  Discovery: /__praisonai__/discovery")
+            
+            from praisonai.recipe.serve import serve, load_config
+            
+            # Load config
+            config = load_config(parsed["config"]) if parsed["config"] else {}
+            if parsed["api_key"]:
+                config["api_key"] = parsed["api_key"]
+            
+            serve(
+                host=parsed["host"],
+                port=parsed["port"],
+                reload=parsed["reload"],
+                config=config,
+            )
+            
+        except ImportError as e:
+            self._print_error(f"Missing dependency: {e}")
+            print("Install with: pip install praisonai[serve]")
+            return self.EXIT_GENERAL_ERROR
+        except Exception as e:
+            self._print_error(str(e))
+            return self.EXIT_GENERAL_ERROR
+        
+        return self.EXIT_SUCCESS
+    
+    def cmd_mcp(self, args: List[str]) -> int:
+        """Launch MCP server."""
+        spec = {
+            "host": {"default": self.DEFAULT_HOST},
+            "port": {"default": 8080, "type": "int"},
+            "transport": {"default": "http"},
+            "tools_file": {"default": None},
+        }
+        parsed = self._parse_args(args, spec)
+        
+        try:
+            self._print_success(f"Starting MCP server on {parsed['host']}:{parsed['port']}")
+            print(f"  Transport: {parsed['transport']}")
+            print("  Discovery: /__praisonai__/discovery")
+            
+            app = self._create_mcp_app(parsed)
+            self._run_server(app, parsed["host"], parsed["port"], False)
+            
+        except ImportError as e:
+            self._print_error(f"Missing dependency: {e}")
+            return self.EXIT_GENERAL_ERROR
+        except Exception as e:
+            self._print_error(str(e))
+            return self.EXIT_GENERAL_ERROR
+        
+        return self.EXIT_SUCCESS
+    
+    def _create_mcp_app(self, config: Dict[str, Any]) -> Any:
+        """Create FastAPI app for MCP server."""
+        from fastapi import FastAPI
+        
+        from praisonai.endpoints.discovery import (
+            create_discovery_document,
+            ProviderInfo,
+        )
+        from praisonai.endpoints.server import add_discovery_routes
+        
+        # Create discovery document
+        discovery = create_discovery_document(server_name="praisonai-mcp")
+        discovery.add_provider(ProviderInfo(
+            type="mcp",
+            name="MCP Server",
+            description=f"MCP server ({config['transport']} transport)",
+            capabilities=["list-tools", "call-tool"],
+        ))
+        
+        app = FastAPI(
+            title="PraisonAI MCP Server",
+            description="MCP protocol server",
+        )
+        
+        add_discovery_routes(app, discovery)
+        
+        # MCP tools endpoint
+        @app.get("/mcp/tools")
+        async def list_tools():
+            """List available MCP tools."""
+            # TODO: Load tools from config or registry
+            return {"tools": []}
+        
+        @app.post("/mcp/tools/call")
+        async def call_tool(request_data: dict):
+            """Call an MCP tool."""
+            tool_name = request_data.get("tool")
+            _ = request_data.get("arguments", {})  # Arguments for tool
+            
+            # TODO: Execute tool
+            return {"result": None, "tool": tool_name}
+        
+        @app.get("/")
+        async def root():
+            return {
+                "message": "PraisonAI MCP Server",
+                "transport": config["transport"],
+                "discovery": "/__praisonai__/discovery",
+            }
+        
+        return app
+    
+    def cmd_tools(self, args: List[str]) -> int:
+        """Launch tools as MCP server."""
+        spec = {
+            "host": {"default": self.DEFAULT_HOST},
+            "port": {"default": 8081, "type": "int"},
+            "tools_file": {"default": None},
+        }
+        parsed = self._parse_args(args, spec)
+        
+        try:
+            self._print_success(f"Starting tools MCP server on {parsed['host']}:{parsed['port']}")
+            print("  Discovery: /__praisonai__/discovery")
+            
+            app = self._create_tools_app(parsed)
+            self._run_server(app, parsed["host"], parsed["port"], False)
+            
+        except ImportError as e:
+            self._print_error(f"Missing dependency: {e}")
+            return self.EXIT_GENERAL_ERROR
+        except Exception as e:
+            self._print_error(str(e))
+            return self.EXIT_GENERAL_ERROR
+        
+        return self.EXIT_SUCCESS
+    
+    def _create_tools_app(self, config: Dict[str, Any]) -> Any:
+        """Create FastAPI app for tools MCP server."""
+        from fastapi import FastAPI
+        
+        from praisonai.endpoints.discovery import (
+            create_discovery_document,
+            ProviderInfo,
+        )
+        from praisonai.endpoints.server import add_discovery_routes
+        
+        discovery = create_discovery_document(server_name="praisonai-tools-mcp")
+        discovery.add_provider(ProviderInfo(
+            type="tools-mcp",
+            name="Tools MCP Server",
+            description="Python tools exposed as MCP server",
+            capabilities=["list-tools", "call-tool"],
+        ))
+        
+        app = FastAPI(
+            title="PraisonAI Tools MCP Server",
+            description="Tools exposed as MCP server",
+        )
+        
+        add_discovery_routes(app, discovery)
+        
+        @app.get("/tools")
+        async def list_tools():
+            """List available tools."""
+            return {"tools": []}
+        
+        @app.post("/tools/call")
+        async def call_tool(request_data: dict):
+            """Call a tool."""
+            return {"result": None}
+        
+        @app.get("/")
+        async def root():
+            return {
+                "message": "PraisonAI Tools MCP Server",
+                "discovery": "/__praisonai__/discovery",
+            }
+        
+        return app
+    
+    def cmd_a2a(self, args: List[str]) -> int:
+        """Launch A2A protocol server."""
+        spec = {
+            "host": {"default": self.DEFAULT_HOST},
+            "port": {"default": 8082, "type": "int"},
+            "file": {"default": "agents.yaml"},
+        }
+        parsed = self._parse_args(args, spec)
+        
+        try:
+            self._print_success(f"Starting A2A server on {parsed['host']}:{parsed['port']}")
+            print("  Agent Card: /.well-known/agent.json")
+            print("  Discovery: /__praisonai__/discovery")
+            
+            app = self._create_a2a_app(parsed)
+            self._run_server(app, parsed["host"], parsed["port"], False)
+            
+        except ImportError as e:
+            self._print_error(f"Missing dependency: {e}")
+            return self.EXIT_GENERAL_ERROR
+        except Exception as e:
+            self._print_error(str(e))
+            return self.EXIT_GENERAL_ERROR
+        
+        return self.EXIT_SUCCESS
+    
+    def _create_a2a_app(self, config: Dict[str, Any]) -> Any:
+        """Create FastAPI app for A2A server."""
+        from fastapi import FastAPI
+        
+        from praisonai.endpoints.discovery import (
+            create_discovery_document,
+            EndpointInfo,
+            ProviderInfo,
+        )
+        from praisonai.endpoints.server import add_discovery_routes
+        
+        discovery = create_discovery_document(server_name="praisonai-a2a")
+        discovery.add_provider(ProviderInfo(
+            type="a2a",
+            name="A2A Protocol",
+            description="Agent-to-Agent communication",
+            capabilities=["agent-card", "message-send"],
+        ))
+        
+        app = FastAPI(
+            title="PraisonAI A2A Server",
+            description="A2A protocol server",
+        )
+        
+        add_discovery_routes(app, discovery)
+        
+        # Agent card
+        @app.get("/.well-known/agent.json")
+        async def agent_card():
+            """Return agent card for A2A discovery."""
+            return {
+                "name": "PraisonAI Agent",
+                "description": "PraisonAI Agent via A2A protocol",
+                "version": "1.0.0",
+                "url": f"http://{config.get('host', 'localhost')}:{config.get('port', 8082)}/a2a",
+                "capabilities": {
+                    "streaming": True,
+                    "pushNotifications": False,
+                },
+                "skills": [],
+            }
+        
+        @app.get("/status")
+        async def status():
+            """Return server status."""
+            return {"status": "ok", "name": "PraisonAI A2A", "version": "1.0.0"}
+        
+        @app.post("/a2a")
+        async def a2a_endpoint(request_data: dict):
+            """Handle A2A JSON-RPC requests."""
+            method = request_data.get("method")
+            params = request_data.get("params", {})
+            request_id = request_data.get("id")
+            
+            if method == "message/send":
+                # Handle message
+                message = params.get("message", {})
+                parts = message.get("parts", [])
+                text = ""
+                for part in parts:
+                    if part.get("type") == "text":
+                        text += part.get("text", "")
+                
+                # TODO: Process with agent
+                return {
+                    "jsonrpc": "2.0",
+                    "id": request_id,
+                    "result": {
+                        "message": {
+                            "role": "assistant",
+                            "parts": [{"type": "text", "text": f"Received: {text}"}],
+                        },
+                    },
+                }
+            
+            return {
+                "jsonrpc": "2.0",
+                "id": request_id,
+                "error": {"code": -32601, "message": f"Method not found: {method}"},
+            }
+        
+        discovery.add_endpoint(EndpointInfo(
+            name="a2a",
+            description="A2A protocol endpoint",
+            provider_type="a2a",
+            streaming=["sse"],
+        ))
+        
+        @app.get("/")
+        async def root():
+            return {
+                "message": "PraisonAI A2A Server",
+                "agent_card": "/.well-known/agent.json",
+                "discovery": "/__praisonai__/discovery",
+            }
+        
+        return app
+    
+    def cmd_a2u(self, args: List[str]) -> int:
+        """Launch A2U event stream server."""
+        spec = {
+            "host": {"default": self.DEFAULT_HOST},
+            "port": {"default": 8083, "type": "int"},
+        }
+        parsed = self._parse_args(args, spec)
+        
+        try:
+            self._print_success(f"Starting A2U server on {parsed['host']}:{parsed['port']}")
+            print("  Events: /a2u/events/<stream>")
+            print("  Discovery: /__praisonai__/discovery")
+            
+            app = self._create_a2u_app(parsed)
+            self._run_server(app, parsed["host"], parsed["port"], False)
+            
+        except ImportError as e:
+            self._print_error(f"Missing dependency: {e}")
+            return self.EXIT_GENERAL_ERROR
+        except Exception as e:
+            self._print_error(str(e))
+            return self.EXIT_GENERAL_ERROR
+        
+        return self.EXIT_SUCCESS
+    
+    def _create_a2u_app(self, config: Dict[str, Any]) -> Any:
+        """Create FastAPI app for A2U server."""
+        from fastapi import FastAPI
+        
+        from praisonai.endpoints.discovery import (
+            create_discovery_document,
+            EndpointInfo,
+            ProviderInfo,
+        )
+        from praisonai.endpoints.server import add_discovery_routes
+        from praisonai.endpoints.a2u_server import create_a2u_routes
+        
+        discovery = create_discovery_document(server_name="praisonai-a2u")
+        discovery.add_provider(ProviderInfo(
+            type="a2u",
+            name="A2U Event Stream",
+            description="Agent-to-User event streaming",
+            capabilities=["subscribe", "stream"],
+        ))
+        
+        app = FastAPI(
+            title="PraisonAI A2U Server",
+            description="A2U event stream server",
+        )
+        
+        add_discovery_routes(app, discovery)
+        create_a2u_routes(app)
+        
+        discovery.add_endpoint(EndpointInfo(
+            name="events",
+            description="Agent event stream",
+            provider_type="a2u",
+            streaming=["sse"],
+        ))
+        
+        @app.get("/")
+        async def root():
+            return {
+                "message": "PraisonAI A2U Server",
+                "events": "/a2u/events/<stream>",
+                "discovery": "/__praisonai__/discovery",
+            }
+        
+        return app
+    
+    def cmd_unified(self, args: List[str]) -> int:
+        """Launch unified server with all providers."""
+        spec = {
+            "host": {"default": self.DEFAULT_HOST},
+            "port": {"default": self.DEFAULT_PORT, "type": "int"},
+            "file": {"default": "agents.yaml"},
+            "reload": {"flag": True, "default": False},
+            "api_key": {"default": None},
+        }
+        parsed = self._parse_args(args, spec)
+        
+        try:
+            self._print_success(f"Starting unified server on {parsed['host']}:{parsed['port']}")
+            print("  Providers: agents-api, recipe, mcp, a2a, a2u")
+            print("  Discovery: /__praisonai__/discovery")
+            
+            app = self._create_unified_app(parsed)
+            self._run_server(app, parsed["host"], parsed["port"], parsed["reload"])
+            
+        except ImportError as e:
+            self._print_error(f"Missing dependency: {e}")
+            print("Install with: pip install praisonai[serve]")
+            return self.EXIT_GENERAL_ERROR
+        except Exception as e:
+            self._print_error(str(e))
+            return self.EXIT_GENERAL_ERROR
+        
+        return self.EXIT_SUCCESS
+    
+    def _create_unified_app(self, config: Dict[str, Any]) -> Any:
+        """Create unified FastAPI app with all providers."""
+        from fastapi import FastAPI
+        
+        from praisonai.endpoints.discovery import (
+            create_discovery_document,
+            EndpointInfo,
+            ProviderInfo,
+        )
+        from praisonai.endpoints.server import add_discovery_routes
+        from praisonai.endpoints.a2u_server import create_a2u_routes
+        
+        discovery = create_discovery_document(server_name="praisonai-unified")
+        
+        # Add all providers
+        discovery.add_provider(ProviderInfo(
+            type="agents-api",
+            name="Agents API",
+            capabilities=["invoke", "health"],
+        ))
+        discovery.add_provider(ProviderInfo(
+            type="recipe",
+            name="Recipe Runner",
+            capabilities=["list", "describe", "invoke", "stream"],
+        ))
+        discovery.add_provider(ProviderInfo(
+            type="mcp",
+            name="MCP Server",
+            capabilities=["list-tools", "call-tool"],
+        ))
+        discovery.add_provider(ProviderInfo(
+            type="a2a",
+            name="A2A Protocol",
+            capabilities=["agent-card", "message-send"],
+        ))
+        discovery.add_provider(ProviderInfo(
+            type="a2u",
+            name="A2U Event Stream",
+            capabilities=["subscribe", "stream"],
+        ))
+        
+        app = FastAPI(
+            title="PraisonAI Unified Server",
+            description="Unified server with all PraisonAI providers",
+        )
+        
+        add_discovery_routes(app, discovery)
+        create_a2u_routes(app)
+        
+        # Add sample endpoints
+        discovery.add_endpoint(EndpointInfo(
+            name="agents",
+            description="Agents workflow endpoint",
+            provider_type="agents-api",
+        ))
+        discovery.add_endpoint(EndpointInfo(
+            name="events",
+            description="Agent event stream",
+            provider_type="a2u",
+            streaming=["sse"],
+        ))
+        
+        @app.get("/")
+        async def root():
+            return {
+                "message": "PraisonAI Unified Server",
+                "providers": ["agents-api", "recipe", "mcp", "a2a", "a2u"],
+                "discovery": "/__praisonai__/discovery",
+            }
+        
+        @app.get("/.well-known/agent.json")
+        async def agent_card():
+            return {
+                "name": "PraisonAI Unified",
+                "description": "PraisonAI Unified Server",
+                "version": "1.0.0",
+            }
+        
+        return app
+    
+    def _run_server(self, app: Any, host: str, port: int, reload: bool) -> None:
+        """Run the server with uvicorn."""
+        import uvicorn
+        uvicorn.run(app, host=host, port=port, reload=reload)
+
+
+def handle_serve_command(args: List[str]) -> int:
+    """Entry point for serve command."""
+    handler = ServeHandler()
+    return handler.handle(args)

src/praisonai/praisonai/cli/main.py

@@ -698,7 +698,7 @@ class PraisonAI:
             return default_args
         
         # Define special commands
-        special_commands = ['chat', 'code', 'call', 'realtime', 'train', 'ui', 'context', 'research', 'memory', 'rules', 'workflow', 'hooks', 'knowledge', 'session', 'tools', 'todo', 'docs', 'mcp', 'commit', 'serve', 'schedule', 'skills', 'profile', 'eval', 'agents', 'run', 'thinking', 'compaction', 'output', 'deploy', 'templates', 'recipe', 'endpoints', 'audio', 'embed', 'images', 'moderate', 'files', 'batches', 'vector-stores', 'rerank', 'ocr', 'assistants', 'fine-tuning', 'completions', 'messages', 'guardrails', 'rag', 'videos', 'a2a', 'containers', 'passthrough', 'responses', 'search', 'realtime-api', 'doctor']
+        special_commands = ['chat', 'code', 'call', 'realtime', 'train', 'ui', 'context', 'research', 'memory', 'rules', 'workflow', 'hooks', 'knowledge', 'session', 'tools', 'todo', 'docs', 'mcp', 'commit', 'serve', 'schedule', 'skills', 'profile', 'eval', 'agents', 'run', 'thinking', 'compaction', 'output', 'deploy', 'templates', 'recipe', 'endpoints', 'audio', 'embed', 'images', 'moderate', 'files', 'batches', 'vector-stores', 'rerank', 'ocr', 'assistants', 'fine-tuning', 'completions', 'messages', 'guardrails', 'rag', 'videos', 'a2a', 'containers', 'passthrough', 'responses', 'search', 'realtime-api', 'doctor', 'registry', 'package', 'install', 'uninstall']
         
         parser = argparse.ArgumentParser(prog="praisonai", description="praisonAI command-line interface")
         parser.add_argument("--framework", choices=["crewai", "autogen", "praisonai"], help="Specify the framework")
@@ -1193,11 +1193,17 @@ class PraisonAI:
                 sys.exit(exit_code)
             
             elif args.command == 'endpoints':
-                # Endpoints command - client CLI for recipe endpoints
+                # Endpoints command - unified client CLI for all server types
                 from .features.endpoints import handle_endpoints_command
                 exit_code = handle_endpoints_command(unknown_args)
                 sys.exit(exit_code)
             
+            elif args.command == 'serve':
+                # Serve command - launch PraisonAI servers
+                from .features.serve import handle_serve_command
+                exit_code = handle_serve_command(unknown_args)
+                sys.exit(exit_code)
+            
             elif args.command == 'agents':
                 # Agents command - run multiple agents with custom definitions
                 if not PRAISONAI_AVAILABLE:
@@ -1377,6 +1383,34 @@ class PraisonAI:
                 handler = DoctorHandler()
                 exit_code = handler.run(unknown_args)
                 sys.exit(exit_code)
+            
+            elif args.command == 'registry':
+                # Registry command - manage recipe registry server
+                from .features.registry import RegistryHandler
+                handler = RegistryHandler()
+                exit_code = handler.handle(unknown_args)
+                sys.exit(exit_code)
+            
+            elif args.command == 'package':
+                # Package command - pip-like package management
+                from .features.package import PackageHandler
+                handler = PackageHandler()
+                exit_code = handler.handle(unknown_args)
+                sys.exit(exit_code)
+            
+            elif args.command == 'install':
+                # Install command - shortcut for package install
+                from .features.package import PackageHandler
+                handler = PackageHandler()
+                exit_code = handler.cmd_install(unknown_args)
+                sys.exit(exit_code)
+            
+            elif args.command == 'uninstall':
+                # Uninstall command - shortcut for package uninstall
+                from .features.package import PackageHandler
+                handler = PackageHandler()
+                exit_code = handler.cmd_uninstall(unknown_args)
+                sys.exit(exit_code)
 
         # Only check framework availability for agent-related operations
         if not args.command and (args.init or args.auto or args.framework):

src/praisonai/praisonai/deploy.py

@@ -57,7 +57,7 @@ class CloudDeployer:
             file.write("FROM python:3.11-slim\n")
             file.write("WORKDIR /app\n")
             file.write("COPY . .\n")
-            file.write("RUN pip install flask praisonai==2.7.3 gunicorn markdown\n")
+            file.write("RUN pip install flask praisonai==2.7.6 gunicorn markdown\n")
             file.write("EXPOSE 8080\n")
             file.write('CMD ["gunicorn", "-b", "0.0.0.0:8080", "api:app"]\n')
             

src/praisonai/praisonai/endpoints/__init__.py

@@ -0,0 +1,53 @@
+"""
+Unified Endpoints Module
+
+Provides unified discovery, provider adapters, and server utilities
+for all PraisonAI serve features.
+
+Provider Types:
+- recipe: Recipe runner endpoints
+- agents-api: Single/multi-agent HTTP API
+- mcp: MCP server (stdio, http, sse)
+- tools-mcp: Tools exposed as MCP server
+- a2a: Agent-to-agent protocol
+- a2u: Agent-to-user event stream
+
+Architecture:
+- Discovery schema is versioned and consistent across all providers
+- Provider adapters abstract protocol differences
+- CLI client uses unified discovery for list/describe/invoke/health
+"""
+
+# Lazy loading for all exports
+_lazy_imports = {
+    "DiscoveryDocument": ".discovery",
+    "EndpointInfo": ".discovery",
+    "ProviderInfo": ".discovery",
+    "SCHEMA_VERSION": ".discovery",
+    "create_discovery_document": ".discovery",
+    "BaseProvider": ".providers.base",
+    "RecipeProvider": ".providers.recipe",
+    "AgentsAPIProvider": ".providers.agents_api",
+    "MCPProvider": ".providers.mcp",
+    "ToolsMCPProvider": ".providers.tools_mcp",
+    "A2AProvider": ".providers.a2a",
+    "A2UProvider": ".providers.a2u",
+    "ProviderRegistry": ".registry",
+    "get_provider": ".registry",
+    "register_provider": ".registry",
+    "list_provider_types": ".registry",
+    "get_provider_class": ".registry",
+    "create_unified_app": ".server",
+    "add_discovery_routes": ".server",
+}
+
+def __getattr__(name: str):
+    if name in _lazy_imports:
+        module_path = _lazy_imports[name]
+        import importlib
+        module = importlib.import_module(module_path, package=__name__)
+        return getattr(module, name)
+    raise AttributeError(f"module {__name__!r} has no attribute {name!r}")
+
+def __dir__():
+    return list(_lazy_imports.keys())

src/praisonai/praisonai/endpoints/a2u_server.py

@@ -0,0 +1,410 @@
+"""
+A2U (Agent-to-User) Event Stream Server
+
+Provides SSE-based event streaming for agent-to-user communication.
+"""
+
+import asyncio
+import json
+import logging
+import uuid
+from dataclasses import dataclass, field
+from datetime import datetime, timezone
+from typing import Any, Dict, List, Optional, Set
+
+logger = logging.getLogger(__name__)
+
+
+@dataclass
+class A2UEvent:
+    """An event in the A2U stream."""
+    event_type: str
+    data: Dict[str, Any]
+    timestamp: str = field(default_factory=lambda: datetime.now(timezone.utc).isoformat())
+    event_id: str = field(default_factory=lambda: uuid.uuid4().hex[:12])
+    
+    def to_sse(self) -> str:
+        """Convert to SSE format."""
+        return f"event: {self.event_type}\ndata: {json.dumps(self.data)}\nid: {self.event_id}\n\n"
+    
+    def to_dict(self) -> Dict[str, Any]:
+        """Convert to dictionary."""
+        return {
+            "event_type": self.event_type,
+            "data": self.data,
+            "timestamp": self.timestamp,
+            "event_id": self.event_id,
+        }
+
+
+@dataclass
+class A2USubscription:
+    """A subscription to an A2U event stream."""
+    subscription_id: str
+    stream_name: str
+    filters: List[str] = field(default_factory=list)
+    created_at: str = field(default_factory=lambda: datetime.now(timezone.utc).isoformat())
+    
+    def matches_event(self, event: A2UEvent) -> bool:
+        """Check if event matches subscription filters."""
+        if not self.filters:
+            return True
+        return event.event_type in self.filters
+
+
+class A2UEventBus:
+    """
+    Event bus for A2U event distribution.
+    
+    Manages subscriptions and broadcasts events to subscribers.
+    """
+    
+    def __init__(self):
+        """Initialize the event bus."""
+        self._subscriptions: Dict[str, A2USubscription] = {}
+        self._queues: Dict[str, asyncio.Queue] = {}
+        self._streams: Dict[str, Set[str]] = {}  # stream_name -> subscription_ids
+    
+    def subscribe(
+        self,
+        stream_name: str = "events",
+        filters: Optional[List[str]] = None,
+    ) -> A2USubscription:
+        """
+        Subscribe to an event stream.
+        
+        Args:
+            stream_name: Name of the stream to subscribe to
+            filters: Optional list of event types to filter
+            
+        Returns:
+            A2USubscription object
+        """
+        subscription_id = f"sub-{uuid.uuid4().hex[:12]}"
+        subscription = A2USubscription(
+            subscription_id=subscription_id,
+            stream_name=stream_name,
+            filters=filters or [],
+        )
+        
+        self._subscriptions[subscription_id] = subscription
+        self._queues[subscription_id] = asyncio.Queue()
+        
+        if stream_name not in self._streams:
+            self._streams[stream_name] = set()
+        self._streams[stream_name].add(subscription_id)
+        
+        logger.debug(f"Created subscription {subscription_id} for stream {stream_name}")
+        return subscription
+    
+    def unsubscribe(self, subscription_id: str) -> bool:
+        """
+        Unsubscribe from an event stream.
+        
+        Args:
+            subscription_id: ID of the subscription to remove
+            
+        Returns:
+            True if unsubscribed, False if not found
+        """
+        if subscription_id not in self._subscriptions:
+            return False
+        
+        subscription = self._subscriptions[subscription_id]
+        
+        # Remove from stream set
+        if subscription.stream_name in self._streams:
+            self._streams[subscription.stream_name].discard(subscription_id)
+        
+        # Clean up
+        del self._subscriptions[subscription_id]
+        del self._queues[subscription_id]
+        
+        logger.debug(f"Removed subscription {subscription_id}")
+        return True
+    
+    async def publish(self, event: A2UEvent, stream_name: str = "events") -> int:
+        """
+        Publish an event to a stream.
+        
+        Args:
+            event: Event to publish
+            stream_name: Name of the stream
+            
+        Returns:
+            Number of subscribers that received the event
+        """
+        if stream_name not in self._streams:
+            return 0
+        
+        count = 0
+        for sub_id in self._streams[stream_name]:
+            subscription = self._subscriptions.get(sub_id)
+            if subscription and subscription.matches_event(event):
+                await self._queues[sub_id].put(event)
+                count += 1
+        
+        logger.debug(f"Published event {event.event_type} to {count} subscribers")
+        return count
+    
+    def publish_sync(self, event: A2UEvent, stream_name: str = "events") -> int:
+        """
+        Synchronously publish an event (creates event loop if needed).
+        
+        Args:
+            event: Event to publish
+            stream_name: Name of the stream
+            
+        Returns:
+            Number of subscribers that received the event
+        """
+        try:
+            loop = asyncio.get_event_loop()
+            if loop.is_running():
+                # Schedule in running loop
+                asyncio.ensure_future(self.publish(event, stream_name))
+                return len(self._streams.get(stream_name, set()))
+            else:
+                return loop.run_until_complete(self.publish(event, stream_name))
+        except RuntimeError:
+            # No event loop, create one
+            return asyncio.run(self.publish(event, stream_name))
+    
+    async def get_events(
+        self,
+        subscription_id: str,
+        timeout: float = 30.0,
+    ):
+        """
+        Async generator for subscription events.
+        
+        Args:
+            subscription_id: ID of the subscription
+            timeout: Timeout for waiting for events
+            
+        Yields:
+            A2UEvent objects
+        """
+        if subscription_id not in self._queues:
+            return
+        
+        queue = self._queues[subscription_id]
+        
+        while True:
+            try:
+                event = await asyncio.wait_for(queue.get(), timeout=timeout)
+                yield event
+            except asyncio.TimeoutError:
+                # Send keepalive
+                yield A2UEvent(event_type="keepalive", data={})
+
+
+# Global event bus instance
+_event_bus: Optional[A2UEventBus] = None
+
+
+def get_event_bus() -> A2UEventBus:
+    """Get or create the global event bus."""
+    global _event_bus
+    if _event_bus is None:
+        _event_bus = A2UEventBus()
+    return _event_bus
+
+
+def create_a2u_routes(app: Any, event_bus: Optional[A2UEventBus] = None) -> None:
+    """
+    Add A2U routes to a FastAPI/Starlette application.
+    
+    Args:
+        app: FastAPI or Starlette application
+        event_bus: Optional event bus (uses global if not provided)
+    """
+    bus = event_bus or get_event_bus()
+    
+    try:
+        from starlette.responses import JSONResponse, StreamingResponse
+        from starlette.routing import Route
+    except ImportError:
+        try:
+            from fastapi.responses import JSONResponse, StreamingResponse
+        except ImportError:
+            raise ImportError("Starlette or FastAPI required for A2U routes")
+    
+    async def a2u_info(request):
+        """GET /a2u/info - Get A2U server info."""
+        return JSONResponse({
+            "name": "A2U Event Stream",
+            "version": "1.0.0",
+            "streams": list(bus._streams.keys()) or ["events"],
+            "event_types": [
+                "agent.started",
+                "agent.thinking",
+                "agent.tool_call",
+                "agent.response",
+                "agent.completed",
+                "agent.error",
+            ],
+        })
+    
+    async def a2u_subscribe(request):
+        """POST /a2u/subscribe - Subscribe to an event stream."""
+        try:
+            body = await request.json()
+        except Exception:
+            body = {}
+        
+        stream_name = body.get("stream", "events")
+        filters = body.get("filters", [])
+        
+        subscription = bus.subscribe(stream_name, filters)
+        
+        base_url = str(request.url).rsplit("/", 1)[0]
+        
+        return JSONResponse({
+            "subscription_id": subscription.subscription_id,
+            "stream_name": subscription.stream_name,
+            "stream_url": f"{base_url}/events/{subscription.subscription_id}",
+            "created_at": subscription.created_at,
+        })
+    
+    async def a2u_unsubscribe(request):
+        """POST /a2u/unsubscribe - Unsubscribe from an event stream."""
+        try:
+            body = await request.json()
+        except Exception:
+            return JSONResponse({"error": "Invalid JSON"}, status_code=400)
+        
+        subscription_id = body.get("subscription_id")
+        if not subscription_id:
+            return JSONResponse({"error": "subscription_id required"}, status_code=400)
+        
+        if bus.unsubscribe(subscription_id):
+            return JSONResponse({"status": "unsubscribed"})
+        else:
+            return JSONResponse({"error": "Subscription not found"}, status_code=404)
+    
+    async def a2u_events_stream(request):
+        """GET /a2u/events/{stream_name} - Stream events via SSE."""
+        stream_name = request.path_params.get("stream_name", "events")
+        
+        # Create subscription for this stream
+        subscription = bus.subscribe(stream_name)
+        
+        async def event_generator():
+            try:
+                async for event in bus.get_events(subscription.subscription_id):
+                    yield event.to_sse()
+            finally:
+                bus.unsubscribe(subscription.subscription_id)
+        
+        return StreamingResponse(
+            event_generator(),
+            media_type="text/event-stream",
+            headers={
+                "Cache-Control": "no-cache",
+                "Connection": "keep-alive",
+                "X-Accel-Buffering": "no",
+            },
+        )
+    
+    async def a2u_events_subscription(request):
+        """GET /a2u/events/sub/{subscription_id} - Stream events for subscription."""
+        subscription_id = request.path_params.get("subscription_id")
+        
+        if subscription_id not in bus._subscriptions:
+            return JSONResponse({"error": "Subscription not found"}, status_code=404)
+        
+        async def event_generator():
+            async for event in bus.get_events(subscription_id):
+                yield event.to_sse()
+        
+        return StreamingResponse(
+            event_generator(),
+            media_type="text/event-stream",
+            headers={
+                "Cache-Control": "no-cache",
+                "Connection": "keep-alive",
+                "X-Accel-Buffering": "no",
+            },
+        )
+    
+    async def a2u_health(request):
+        """GET /a2u/health - A2U health check."""
+        return JSONResponse({
+            "status": "healthy",
+            "active_subscriptions": len(bus._subscriptions),
+            "active_streams": len(bus._streams),
+        })
+    
+    # Add routes based on app type
+    if hasattr(app, 'add_api_route'):
+        # FastAPI
+        app.add_api_route("/a2u/info", a2u_info, methods=["GET"])
+        app.add_api_route("/a2u/subscribe", a2u_subscribe, methods=["POST"])
+        app.add_api_route("/a2u/unsubscribe", a2u_unsubscribe, methods=["POST"])
+        app.add_api_route("/a2u/events/{stream_name}", a2u_events_stream, methods=["GET"])
+        app.add_api_route("/a2u/events/sub/{subscription_id}", a2u_events_subscription, methods=["GET"])
+        app.add_api_route("/a2u/health", a2u_health, methods=["GET"])
+    elif hasattr(app, 'routes'):
+        # Starlette
+        app.routes.extend([
+            Route("/a2u/info", a2u_info, methods=["GET"]),
+            Route("/a2u/subscribe", a2u_subscribe, methods=["POST"]),
+            Route("/a2u/unsubscribe", a2u_unsubscribe, methods=["POST"]),
+            Route("/a2u/events/{stream_name}", a2u_events_stream, methods=["GET"]),
+            Route("/a2u/events/sub/{subscription_id}", a2u_events_subscription, methods=["GET"]),
+            Route("/a2u/health", a2u_health, methods=["GET"]),
+        ])
+
+
+# Helper functions for publishing events
+def emit_agent_event(
+    event_type: str,
+    data: Dict[str, Any],
+    agent_id: Optional[str] = None,
+    stream_name: str = "events",
+) -> None:
+    """
+    Emit an agent event to the A2U stream.
+    
+    Args:
+        event_type: Type of event (e.g., "agent.started", "agent.response")
+        data: Event data
+        agent_id: Optional agent ID to include
+        stream_name: Stream to publish to
+    """
+    if agent_id:
+        data["agent_id"] = agent_id
+    
+    event = A2UEvent(event_type=event_type, data=data)
+    get_event_bus().publish_sync(event, stream_name)
+
+
+def emit_agent_started(agent_id: str, agent_name: str, **kwargs) -> None:
+    """Emit agent.started event."""
+    emit_agent_event("agent.started", {"agent_name": agent_name, **kwargs}, agent_id)
+
+
+def emit_agent_thinking(agent_id: str, message: str = "", **kwargs) -> None:
+    """Emit agent.thinking event."""
+    emit_agent_event("agent.thinking", {"message": message, **kwargs}, agent_id)
+
+
+def emit_agent_tool_call(agent_id: str, tool_name: str, arguments: Dict = None, **kwargs) -> None:
+    """Emit agent.tool_call event."""
+    emit_agent_event("agent.tool_call", {"tool_name": tool_name, "arguments": arguments or {}, **kwargs}, agent_id)
+
+
+def emit_agent_response(agent_id: str, response: str, **kwargs) -> None:
+    """Emit agent.response event."""
+    emit_agent_event("agent.response", {"response": response, **kwargs}, agent_id)
+
+
+def emit_agent_completed(agent_id: str, result: Any = None, **kwargs) -> None:
+    """Emit agent.completed event."""
+    emit_agent_event("agent.completed", {"result": result, **kwargs}, agent_id)
+
+
+def emit_agent_error(agent_id: str, error: str, **kwargs) -> None:
+    """Emit agent.error event."""
+    emit_agent_event("agent.error", {"error": error, **kwargs}, agent_id)

src/praisonai/praisonai/endpoints/discovery.py

@@ -0,0 +1,165 @@
+"""
+Unified Discovery Schema
+
+Provides versioned discovery document format for all PraisonAI serve features.
+This schema is consistent across all provider types.
+"""
+
+from dataclasses import dataclass, field, asdict
+from typing import Any, Dict, List, Optional
+from enum import Enum
+
+
+# Schema version - increment on breaking changes
+SCHEMA_VERSION = "1.0.0"
+
+
+class ProviderType(str, Enum):
+    """Supported provider types."""
+    RECIPE = "recipe"
+    AGENTS_API = "agents-api"
+    MCP = "mcp"
+    TOOLS_MCP = "tools-mcp"
+    A2A = "a2a"
+    A2U = "a2u"
+
+
+class StreamingMode(str, Enum):
+    """Supported streaming modes."""
+    NONE = "none"
+    SSE = "sse"
+    WEBSOCKET = "websocket"
+    MCP_STREAM = "mcp-stream"
+
+
+class AuthMode(str, Enum):
+    """Supported authentication modes."""
+    NONE = "none"
+    API_KEY = "api-key"
+    BEARER = "bearer"
+    JWT = "jwt"
+
+
+@dataclass
+class EndpointInfo:
+    """Information about a single endpoint."""
+    name: str
+    description: str = ""
+    provider_type: str = "recipe"
+    tags: List[str] = field(default_factory=list)
+    version: str = "1.0.0"
+    
+    # Schema information
+    input_schema: Optional[Dict[str, Any]] = None
+    output_schema: Optional[Dict[str, Any]] = None
+    
+    # Capabilities
+    streaming: List[str] = field(default_factory=lambda: ["none"])
+    auth_modes: List[str] = field(default_factory=lambda: ["none"])
+    
+    # Metadata
+    examples: List[Dict[str, Any]] = field(default_factory=list)
+    metadata: Dict[str, Any] = field(default_factory=dict)
+    
+    def to_dict(self) -> Dict[str, Any]:
+        """Convert to dictionary."""
+        return asdict(self)
+
+
+@dataclass
+class ProviderInfo:
+    """Information about a provider."""
+    type: str
+    name: str
+    version: str = "1.0.0"
+    description: str = ""
+    capabilities: List[str] = field(default_factory=list)
+    
+    def to_dict(self) -> Dict[str, Any]:
+        """Convert to dictionary."""
+        return asdict(self)
+
+
+@dataclass
+class DiscoveryDocument:
+    """
+    Unified discovery document for PraisonAI servers.
+    
+    This document is served at /__praisonai__/discovery and provides
+    a consistent interface for discovering endpoints across all provider types.
+    """
+    schema_version: str = SCHEMA_VERSION
+    server_name: str = "praisonai"
+    server_version: str = "1.0.0"
+    
+    # Provider information
+    providers: List[ProviderInfo] = field(default_factory=list)
+    
+    # Endpoint information
+    endpoints: List[EndpointInfo] = field(default_factory=list)
+    
+    # Server capabilities
+    auth_modes: List[str] = field(default_factory=lambda: ["none"])
+    streaming_modes: List[str] = field(default_factory=lambda: ["none", "sse"])
+    
+    # Metadata
+    metadata: Dict[str, Any] = field(default_factory=dict)
+    
+    def to_dict(self) -> Dict[str, Any]:
+        """Convert to dictionary for JSON serialization."""
+        return {
+            "schema_version": self.schema_version,
+            "server_name": self.server_name,
+            "server_version": self.server_version,
+            "providers": [p.to_dict() for p in self.providers],
+            "endpoints": [e.to_dict() for e in self.endpoints],
+            "auth_modes": self.auth_modes,
+            "streaming_modes": self.streaming_modes,
+            "metadata": self.metadata,
+        }
+    
+    def add_provider(self, provider: ProviderInfo) -> None:
+        """Add a provider to the discovery document."""
+        self.providers.append(provider)
+    
+    def add_endpoint(self, endpoint: EndpointInfo) -> None:
+        """Add an endpoint to the discovery document."""
+        self.endpoints.append(endpoint)
+    
+    def get_endpoints_by_type(self, provider_type: str) -> List[EndpointInfo]:
+        """Get endpoints filtered by provider type."""
+        return [e for e in self.endpoints if e.provider_type == provider_type]
+    
+    def get_endpoint_by_name(self, name: str) -> Optional[EndpointInfo]:
+        """Get an endpoint by name."""
+        for e in self.endpoints:
+            if e.name == name:
+                return e
+        return None
+
+
+def create_discovery_document(
+    server_name: str = "praisonai",
+    server_version: Optional[str] = None,
+) -> DiscoveryDocument:
+    """
+    Create a new discovery document.
+    
+    Args:
+        server_name: Name of the server
+        server_version: Version of the server (auto-detected if not provided)
+        
+    Returns:
+        DiscoveryDocument instance
+    """
+    if server_version is None:
+        try:
+            from praisonai.version import __version__
+            server_version = __version__
+        except ImportError:
+            server_version = "unknown"
+    
+    return DiscoveryDocument(
+        server_name=server_name,
+        server_version=server_version,
+    )

src/praisonai/praisonai/endpoints/providers/__init__.py

@@ -0,0 +1,28 @@
+"""
+Provider Adapters
+
+Each provider adapter implements the BaseProvider interface
+and handles protocol-specific details for discovery and invocation.
+"""
+
+# Lazy loading for all exports
+_lazy_imports = {
+    "BaseProvider": ".base",
+    "RecipeProvider": ".recipe",
+    "AgentsAPIProvider": ".agents_api",
+    "MCPProvider": ".mcp",
+    "ToolsMCPProvider": ".tools_mcp",
+    "A2AProvider": ".a2a",
+    "A2UProvider": ".a2u",
+}
+
+def __getattr__(name: str):
+    if name in _lazy_imports:
+        module_path = _lazy_imports[name]
+        import importlib
+        module = importlib.import_module(module_path, package=__name__)
+        return getattr(module, name)
+    raise AttributeError(f"module {__name__!r} has no attribute {name!r}")
+
+def __dir__():
+    return list(_lazy_imports.keys())

src/praisonai/praisonai/endpoints/providers/a2a.py

@@ -0,0 +1,253 @@
+"""
+A2A Provider
+
+Provider adapter for Agent-to-Agent protocol endpoints.
+"""
+
+from typing import Any, Dict, Iterator, List, Optional
+
+from .base import BaseProvider, InvokeResult, HealthResult
+from ..discovery import EndpointInfo, ProviderInfo
+
+
+class A2AProvider(BaseProvider):
+    """
+    Provider adapter for A2A (Agent-to-Agent) protocol endpoints.
+    
+    A2A enables agent-to-agent communication following the A2A protocol spec.
+    Supports discovery via /.well-known/agent.json and message passing.
+    """
+    
+    provider_type = "a2a"
+    
+    def get_provider_info(self) -> ProviderInfo:
+        """Get provider information."""
+        return ProviderInfo(
+            type=self.provider_type,
+            name="A2A Protocol",
+            description="Agent-to-Agent communication protocol",
+            capabilities=["agent-card", "message-send", "task-management"],
+        )
+    
+    def list_endpoints(self, tags: Optional[List[str]] = None) -> List[EndpointInfo]:
+        """List available A2A agents."""
+        # Try unified discovery first
+        result = self._make_request("GET", "/__praisonai__/discovery")
+        
+        if not result.get("error") and result.get("data"):
+            data = result.get("data", {})
+            endpoints = []
+            for ep in data.get("endpoints", []):
+                if ep.get("provider_type") == self.provider_type:
+                    endpoints.append(EndpointInfo(
+                        name=ep.get("name", ""),
+                        description=ep.get("description", ""),
+                        provider_type=self.provider_type,
+                        tags=ep.get("tags", []),
+                        streaming=ep.get("streaming", ["sse"]),
+                        auth_modes=ep.get("auth_modes", ["none"]),
+                    ))
+            return endpoints
+        
+        # Fallback: try agent card
+        result = self._make_request("GET", "/.well-known/agent.json")
+        
+        if result.get("error"):
+            return []
+        
+        agent_card = result.get("data", {})
+        
+        return [EndpointInfo(
+            name=agent_card.get("name", "a2a-agent"),
+            description=agent_card.get("description", "A2A Agent"),
+            provider_type=self.provider_type,
+            version=agent_card.get("version", "1.0.0"),
+            streaming=["sse"] if agent_card.get("capabilities", {}).get("streaming") else ["none"],
+            auth_modes=["none"],
+            metadata={"agent_card": agent_card},
+        )]
+    
+    def describe_endpoint(self, name: str) -> Optional[EndpointInfo]:
+        """Get detailed information about an A2A agent."""
+        # Get agent card
+        result = self._make_request("GET", "/.well-known/agent.json")
+        
+        if result.get("error"):
+            return None
+        
+        agent_card = result.get("data", {})
+        
+        return EndpointInfo(
+            name=agent_card.get("name", name),
+            description=agent_card.get("description", ""),
+            provider_type=self.provider_type,
+            version=agent_card.get("version", "1.0.0"),
+            streaming=["sse"] if agent_card.get("capabilities", {}).get("streaming") else ["none"],
+            auth_modes=["none"],
+            metadata={
+                "agent_card": agent_card,
+                "skills": agent_card.get("skills", []),
+                "capabilities": agent_card.get("capabilities", {}),
+            },
+        )
+    
+    def invoke(
+        self,
+        name: str,
+        input_data: Optional[Dict[str, Any]] = None,
+        config: Optional[Dict[str, Any]] = None,
+        stream: bool = False,
+    ) -> InvokeResult:
+        """Send a message to an A2A agent."""
+        import uuid
+        
+        # Build A2A message
+        message = input_data.get("message", "") if input_data else ""
+        if not message and config:
+            message = config.get("message", config.get("query", ""))
+        
+        body = {
+            "jsonrpc": "2.0",
+            "method": "message/send",
+            "id": str(uuid.uuid4()),
+            "params": {
+                "message": {
+                    "role": "user",
+                    "parts": [{"type": "text", "text": message}],
+                },
+            },
+        }
+        
+        result = self._make_request("POST", "/a2a", json_data=body)
+        
+        if result.get("error"):
+            return InvokeResult(
+                ok=False,
+                status="error",
+                error=result["error"].get("message", str(result["error"])),
+            )
+        
+        data = result.get("data", {})
+        
+        # Handle JSON-RPC response
+        if "result" in data:
+            return InvokeResult(
+                ok=True,
+                status="success",
+                data=data["result"],
+            )
+        elif "error" in data:
+            return InvokeResult(
+                ok=False,
+                status="error",
+                error=data["error"].get("message", str(data["error"])),
+            )
+        
+        return InvokeResult(
+            ok=True,
+            status="success",
+            data=data,
+        )
+    
+    def invoke_stream(
+        self,
+        name: str,
+        input_data: Optional[Dict[str, Any]] = None,
+        config: Optional[Dict[str, Any]] = None,
+    ) -> Iterator[Dict[str, Any]]:
+        """Send a streaming message to an A2A agent."""
+        import json
+        import urllib.request
+        import uuid
+        
+        message = input_data.get("message", "") if input_data else ""
+        if not message and config:
+            message = config.get("message", config.get("query", ""))
+        
+        body = {
+            "jsonrpc": "2.0",
+            "method": "message/stream",
+            "id": str(uuid.uuid4()),
+            "params": {
+                "message": {
+                    "role": "user",
+                    "parts": [{"type": "text", "text": message}],
+                },
+            },
+        }
+        
+        full_url = f"{self.base_url}/a2a"
+        
+        headers = {
+            "Content-Type": "application/json",
+            "Accept": "text/event-stream",
+        }
+        if self.api_key:
+            headers["X-API-Key"] = self.api_key
+        
+        data = json.dumps(body).encode("utf-8")
+        
+        try:
+            req = urllib.request.Request(full_url, data=data, headers=headers, method="POST")
+            
+            with urllib.request.urlopen(req, timeout=300) as response:
+                buffer = ""
+                for line in response:
+                    line = line.decode("utf-8")
+                    buffer += line
+                    
+                    if buffer.endswith("\n\n"):
+                        event_type = "message"
+                        event_data = ""
+                        
+                        for part in buffer.strip().split("\n"):
+                            if part.startswith("event:"):
+                                event_type = part[6:].strip()
+                            elif part.startswith("data:"):
+                                event_data = part[5:].strip()
+                        
+                        if event_data:
+                            try:
+                                yield {"event": event_type, "data": json.loads(event_data)}
+                            except json.JSONDecodeError:
+                                yield {"event": event_type, "data": event_data}
+                        
+                        buffer = ""
+                        
+        except Exception as e:
+            yield {"event": "error", "data": {"error": str(e)}}
+    
+    def health(self) -> HealthResult:
+        """Check A2A server health."""
+        # Try status endpoint first
+        result = self._make_request("GET", "/status")
+        
+        if not result.get("error"):
+            data = result.get("data", {})
+            return HealthResult(
+                healthy=data.get("status") == "ok",
+                status=data.get("status", "unknown"),
+                server_name=data.get("name", "A2A Agent"),
+                server_version=data.get("version"),
+                provider_type=self.provider_type,
+            )
+        
+        # Fallback: try agent card
+        result = self._make_request("GET", "/.well-known/agent.json")
+        
+        if result.get("error"):
+            return HealthResult(
+                healthy=False,
+                status="unhealthy",
+                provider_type=self.provider_type,
+                metadata={"error": result["error"].get("message", str(result["error"]))},
+            )
+        
+        agent_card = result.get("data", {})
+        return HealthResult(
+            healthy=True,
+            status="healthy",
+            server_name=agent_card.get("name", "A2A Agent"),
+            server_version=agent_card.get("version"),
+            provider_type=self.provider_type,
+        )

src/praisonai/praisonai/endpoints/providers/a2u.py

@@ -0,0 +1,208 @@
+"""
+A2U Provider
+
+Provider adapter for Agent-to-User event stream endpoints.
+"""
+
+from typing import Any, Dict, Iterator, List, Optional
+
+from .base import BaseProvider, InvokeResult, HealthResult
+from ..discovery import EndpointInfo, ProviderInfo
+
+
+class A2UProvider(BaseProvider):
+    """
+    Provider adapter for A2U (Agent-to-User) event stream endpoints.
+    
+    A2U provides a protocol surface for streaming agent events to users,
+    typically via SSE or WebSocket. This enables real-time UI updates.
+    """
+    
+    provider_type = "a2u"
+    
+    def get_provider_info(self) -> ProviderInfo:
+        """Get provider information."""
+        return ProviderInfo(
+            type=self.provider_type,
+            name="A2U Event Stream",
+            description="Agent-to-User event streaming protocol",
+            capabilities=["event-stream", "subscribe", "unsubscribe"],
+        )
+    
+    def list_endpoints(self, tags: Optional[List[str]] = None) -> List[EndpointInfo]:
+        """List available A2U event streams."""
+        # Try unified discovery first
+        result = self._make_request("GET", "/__praisonai__/discovery")
+        
+        if not result.get("error") and result.get("data"):
+            data = result.get("data", {})
+            endpoints = []
+            for ep in data.get("endpoints", []):
+                if ep.get("provider_type") == self.provider_type:
+                    endpoints.append(EndpointInfo(
+                        name=ep.get("name", ""),
+                        description=ep.get("description", ""),
+                        provider_type=self.provider_type,
+                        tags=ep.get("tags", []),
+                        streaming=ep.get("streaming", ["sse"]),
+                        auth_modes=ep.get("auth_modes", ["none"]),
+                    ))
+            return endpoints
+        
+        # Fallback: check for events endpoint
+        result = self._make_request("GET", "/a2u/info")
+        
+        if result.get("error"):
+            # Return default event stream endpoint
+            return [EndpointInfo(
+                name="events",
+                description="Agent event stream",
+                provider_type=self.provider_type,
+                streaming=["sse"],
+                auth_modes=["none"],
+            )]
+        
+        data = result.get("data", {})
+        streams = data.get("streams", [{"name": "events", "description": "Agent event stream"}])
+        
+        endpoints = []
+        for stream in streams:
+            endpoints.append(EndpointInfo(
+                name=stream.get("name", "events"),
+                description=stream.get("description", "Event stream"),
+                provider_type=self.provider_type,
+                streaming=["sse", "websocket"],
+                auth_modes=["none"],
+            ))
+        
+        return endpoints
+    
+    def describe_endpoint(self, name: str) -> Optional[EndpointInfo]:
+        """Get detailed information about an A2U event stream."""
+        endpoints = self.list_endpoints()
+        for ep in endpoints:
+            if ep.name == name:
+                return ep
+        
+        # Return default info
+        return EndpointInfo(
+            name=name,
+            description=f"Event stream: {name}",
+            provider_type=self.provider_type,
+            streaming=["sse"],
+            auth_modes=["none"],
+            metadata={
+                "event_types": [
+                    "agent.started",
+                    "agent.thinking",
+                    "agent.tool_call",
+                    "agent.response",
+                    "agent.completed",
+                    "agent.error",
+                ],
+            },
+        )
+    
+    def invoke(
+        self,
+        name: str,
+        input_data: Optional[Dict[str, Any]] = None,
+        config: Optional[Dict[str, Any]] = None,
+        stream: bool = False,
+    ) -> InvokeResult:
+        """Subscribe to an A2U event stream (returns subscription info)."""
+        body = {
+            "stream": name,
+            "filters": input_data.get("filters", []) if input_data else [],
+        }
+        
+        result = self._make_request("POST", "/a2u/subscribe", json_data=body)
+        
+        if result.get("error"):
+            return InvokeResult(
+                ok=False,
+                status="error",
+                error=result["error"].get("message", str(result["error"])),
+            )
+        
+        data = result.get("data", {})
+        return InvokeResult(
+            ok=True,
+            status="subscribed",
+            data={
+                "subscription_id": data.get("subscription_id"),
+                "stream_url": data.get("stream_url", f"{self.base_url}/a2u/events/{name}"),
+            },
+        )
+    
+    def invoke_stream(
+        self,
+        name: str,
+        input_data: Optional[Dict[str, Any]] = None,
+        config: Optional[Dict[str, Any]] = None,
+    ) -> Iterator[Dict[str, Any]]:
+        """Stream events from an A2U endpoint."""
+        import json
+        import urllib.request
+        
+        stream_path = f"/a2u/events/{name}"
+        full_url = f"{self.base_url}{stream_path}"
+        
+        headers = {"Accept": "text/event-stream"}
+        if self.api_key:
+            headers["X-API-Key"] = self.api_key
+        
+        try:
+            req = urllib.request.Request(full_url, headers=headers, method="GET")
+            
+            with urllib.request.urlopen(req, timeout=300) as response:
+                buffer = ""
+                for line in response:
+                    line = line.decode("utf-8")
+                    buffer += line
+                    
+                    if buffer.endswith("\n\n"):
+                        event_type = "event"
+                        event_data = ""
+                        
+                        for part in buffer.strip().split("\n"):
+                            if part.startswith("event:"):
+                                event_type = part[6:].strip()
+                            elif part.startswith("data:"):
+                                event_data = part[5:].strip()
+                        
+                        if event_data:
+                            try:
+                                yield {"event": event_type, "data": json.loads(event_data)}
+                            except json.JSONDecodeError:
+                                yield {"event": event_type, "data": event_data}
+                        
+                        buffer = ""
+                        
+        except Exception as e:
+            yield {"event": "error", "data": {"error": str(e)}}
+    
+    def health(self) -> HealthResult:
+        """Check A2U server health."""
+        result = self._make_request("GET", "/health")
+        
+        if result.get("error"):
+            # Try a2u-specific health
+            result = self._make_request("GET", "/a2u/health")
+        
+        if result.get("error"):
+            return HealthResult(
+                healthy=False,
+                status="unhealthy",
+                provider_type=self.provider_type,
+                metadata={"error": result["error"].get("message", str(result["error"]))},
+            )
+        
+        data = result.get("data", {})
+        return HealthResult(
+            healthy=True,
+            status="healthy",
+            server_name=data.get("server_name", "A2U Server"),
+            server_version=data.get("version"),
+            provider_type=self.provider_type,
+        )

src/praisonai/praisonai/endpoints/providers/agents_api.py

@@ -0,0 +1,171 @@
+"""
+Agents API Provider
+
+Provider adapter for agents-as-API endpoints (single agent or multi-agent router).
+"""
+
+from typing import Any, Dict, List, Optional
+
+from .base import BaseProvider, InvokeResult, HealthResult
+from ..discovery import EndpointInfo, ProviderInfo
+
+
+class AgentsAPIProvider(BaseProvider):
+    """
+    Provider adapter for agents-as-API endpoints.
+    
+    Connects to FastAPI-based agent servers launched via Agent.launch() or Agents.launch()
+    and provides unified discovery and invocation interface.
+    """
+    
+    provider_type = "agents-api"
+    
+    def get_provider_info(self) -> ProviderInfo:
+        """Get provider information."""
+        return ProviderInfo(
+            type=self.provider_type,
+            name="Agents API",
+            description="Agent HTTP API endpoints",
+            capabilities=["list", "describe", "invoke", "health"],
+        )
+    
+    def list_endpoints(self, tags: Optional[List[str]] = None) -> List[EndpointInfo]:
+        """List available agent endpoints."""
+        # Try unified discovery first
+        result = self._make_request("GET", "/__praisonai__/discovery")
+        
+        if not result.get("error") and result.get("data"):
+            data = result.get("data", {})
+            endpoints = []
+            for ep in data.get("endpoints", []):
+                if ep.get("provider_type") == self.provider_type:
+                    endpoints.append(EndpointInfo(
+                        name=ep.get("name", ""),
+                        description=ep.get("description", ""),
+                        provider_type=self.provider_type,
+                        tags=ep.get("tags", []),
+                        version=ep.get("version", "1.0.0"),
+                        streaming=ep.get("streaming", ["none"]),
+                        auth_modes=ep.get("auth_modes", ["none"]),
+                    ))
+            return endpoints
+        
+        # Fallback: try root endpoint for endpoint list
+        result = self._make_request("GET", "/")
+        
+        if result.get("error"):
+            return []
+        
+        data = result.get("data", {})
+        endpoint_paths = data.get("endpoints", [])
+        
+        endpoints = []
+        for path in endpoint_paths:
+            endpoints.append(EndpointInfo(
+                name=path.lstrip("/"),
+                description=f"Agent endpoint at {path}",
+                provider_type=self.provider_type,
+                streaming=["none"],
+                auth_modes=["none"],
+            ))
+        
+        return endpoints
+    
+    def describe_endpoint(self, name: str) -> Optional[EndpointInfo]:
+        """Get detailed information about an agent endpoint."""
+        # Try unified discovery first
+        result = self._make_request("GET", "/__praisonai__/discovery")
+        
+        if not result.get("error") and result.get("data"):
+            data = result.get("data", {})
+            for ep in data.get("endpoints", []):
+                if ep.get("name") == name:
+                    return EndpointInfo(
+                        name=ep.get("name", name),
+                        description=ep.get("description", ""),
+                        provider_type=self.provider_type,
+                        tags=ep.get("tags", []),
+                        version=ep.get("version", "1.0.0"),
+                        input_schema=ep.get("input_schema"),
+                        output_schema=ep.get("output_schema"),
+                        streaming=ep.get("streaming", ["none"]),
+                        auth_modes=ep.get("auth_modes", ["none"]),
+                        metadata=ep.get("metadata", {}),
+                    )
+        
+        # Fallback: return basic info
+        return EndpointInfo(
+            name=name,
+            description=f"Agent endpoint: {name}",
+            provider_type=self.provider_type,
+            input_schema={"type": "object", "properties": {"query": {"type": "string"}}},
+            streaming=["none"],
+            auth_modes=["none"],
+        )
+    
+    def invoke(
+        self,
+        name: str,
+        input_data: Optional[Dict[str, Any]] = None,
+        config: Optional[Dict[str, Any]] = None,
+        stream: bool = False,
+    ) -> InvokeResult:
+        """Invoke an agent endpoint."""
+        # Normalize endpoint path
+        path = name if name.startswith("/") else f"/{name}"
+        
+        # Build request body
+        body = input_data or {}
+        if "query" not in body and config and "query" in config:
+            body["query"] = config["query"]
+        
+        result = self._make_request("POST", path, json_data=body)
+        
+        if result.get("status") == 401:
+            return InvokeResult(
+                ok=False,
+                status="auth_error",
+                error="Authentication required",
+            )
+        
+        if result.get("status") == 404:
+            return InvokeResult(
+                ok=False,
+                status="not_found",
+                error=f"Endpoint not found: {name}",
+            )
+        
+        if result.get("error"):
+            return InvokeResult(
+                ok=False,
+                status="error",
+                error=result["error"].get("message", str(result["error"])),
+            )
+        
+        data = result.get("data", {})
+        return InvokeResult(
+            ok=True,
+            status="success",
+            data=data.get("response", data),
+        )
+    
+    def health(self) -> HealthResult:
+        """Check agent server health."""
+        result = self._make_request("GET", "/health")
+        
+        if result.get("error"):
+            return HealthResult(
+                healthy=False,
+                status="unhealthy",
+                provider_type=self.provider_type,
+                metadata={"error": result["error"].get("message", str(result["error"]))},
+            )
+        
+        data = result.get("data", {})
+        return HealthResult(
+            healthy=data.get("status") == "ok",
+            status=data.get("status", "unknown"),
+            server_name="PraisonAI Agents API",
+            provider_type=self.provider_type,
+            metadata={"endpoints": data.get("endpoints", [])},
+        )

src/praisonai/praisonai/endpoints/providers/base.py

@@ -0,0 +1,231 @@
+"""
+Base Provider Interface
+
+Abstract base class for all provider adapters.
+Each provider implements discovery, invocation, and health check methods.
+"""
+
+from abc import ABC, abstractmethod
+from dataclasses import dataclass
+from typing import Any, Dict, Iterator, List, Optional
+
+from ..discovery import EndpointInfo, ProviderInfo
+
+
+@dataclass
+class InvokeResult:
+    """Result from invoking an endpoint."""
+    ok: bool
+    status: str = "success"
+    data: Optional[Any] = None
+    error: Optional[str] = None
+    metadata: Optional[Dict[str, Any]] = None
+    
+    def to_dict(self) -> Dict[str, Any]:
+        """Convert to dictionary."""
+        return {
+            "ok": self.ok,
+            "status": self.status,
+            "data": self.data,
+            "error": self.error,
+            "metadata": self.metadata,
+        }
+
+
+@dataclass
+class HealthResult:
+    """Result from health check."""
+    healthy: bool
+    status: str = "healthy"
+    server_name: Optional[str] = None
+    server_version: Optional[str] = None
+    provider_type: Optional[str] = None
+    metadata: Optional[Dict[str, Any]] = None
+    
+    def to_dict(self) -> Dict[str, Any]:
+        """Convert to dictionary."""
+        return {
+            "healthy": self.healthy,
+            "status": self.status,
+            "server_name": self.server_name,
+            "server_version": self.server_version,
+            "provider_type": self.provider_type,
+            "metadata": self.metadata,
+        }
+
+
+class BaseProvider(ABC):
+    """
+    Abstract base class for provider adapters.
+    
+    Each provider type (recipe, agents-api, mcp, etc.) implements this interface
+    to provide consistent discovery and invocation behavior.
+    """
+    
+    # Provider type identifier
+    provider_type: str = "base"
+    
+    def __init__(
+        self,
+        base_url: str = "http://localhost:8765",
+        api_key: Optional[str] = None,
+        timeout: float = 30.0,
+    ):
+        """
+        Initialize the provider.
+        
+        Args:
+            base_url: Base URL of the server
+            api_key: Optional API key for authentication
+            timeout: Request timeout in seconds
+        """
+        self.base_url = base_url.rstrip("/")
+        self.api_key = api_key
+        self.timeout = timeout
+    
+    @abstractmethod
+    def get_provider_info(self) -> ProviderInfo:
+        """
+        Get provider information.
+        
+        Returns:
+            ProviderInfo with provider details
+        """
+        pass
+    
+    @abstractmethod
+    def list_endpoints(self, tags: Optional[List[str]] = None) -> List[EndpointInfo]:
+        """
+        List available endpoints.
+        
+        Args:
+            tags: Optional list of tags to filter by
+            
+        Returns:
+            List of EndpointInfo objects
+        """
+        pass
+    
+    @abstractmethod
+    def describe_endpoint(self, name: str) -> Optional[EndpointInfo]:
+        """
+        Get detailed information about an endpoint.
+        
+        Args:
+            name: Endpoint name
+            
+        Returns:
+            EndpointInfo or None if not found
+        """
+        pass
+    
+    @abstractmethod
+    def invoke(
+        self,
+        name: str,
+        input_data: Optional[Dict[str, Any]] = None,
+        config: Optional[Dict[str, Any]] = None,
+        stream: bool = False,
+    ) -> InvokeResult:
+        """
+        Invoke an endpoint.
+        
+        Args:
+            name: Endpoint name
+            input_data: Input data for the endpoint
+            config: Optional configuration overrides
+            stream: Whether to stream the response
+            
+        Returns:
+            InvokeResult with response data
+        """
+        pass
+    
+    def invoke_stream(
+        self,
+        name: str,
+        input_data: Optional[Dict[str, Any]] = None,
+        config: Optional[Dict[str, Any]] = None,
+    ) -> Iterator[Dict[str, Any]]:
+        """
+        Invoke an endpoint with streaming.
+        
+        Args:
+            name: Endpoint name
+            input_data: Input data for the endpoint
+            config: Optional configuration overrides
+            
+        Yields:
+            Stream events as dictionaries
+        """
+        # Default implementation - subclasses can override
+        result = self.invoke(name, input_data, config, stream=True)
+        if result.ok:
+            yield {"event": "complete", "data": result.data}
+        else:
+            yield {"event": "error", "data": {"error": result.error}}
+    
+    @abstractmethod
+    def health(self) -> HealthResult:
+        """
+        Check server health.
+        
+        Returns:
+            HealthResult with health status
+        """
+        pass
+    
+    def _make_request(
+        self,
+        method: str,
+        path: str,
+        json_data: Optional[Dict] = None,
+    ) -> Dict[str, Any]:
+        """
+        Make HTTP request to server.
+        
+        Args:
+            method: HTTP method
+            path: URL path
+            json_data: Optional JSON body
+            
+        Returns:
+            Response data dictionary
+        """
+        import json
+        import urllib.request
+        import urllib.error
+        
+        full_url = f"{self.base_url}{path}"
+        
+        headers = {"Content-Type": "application/json"}
+        if self.api_key:
+            headers["X-API-Key"] = self.api_key
+        
+        data = None
+        if json_data:
+            data = json.dumps(json_data).encode("utf-8")
+        
+        try:
+            req = urllib.request.Request(
+                full_url,
+                data=data,
+                headers=headers,
+                method=method,
+            )
+            
+            with urllib.request.urlopen(req, timeout=self.timeout) as response:
+                body = response.read().decode("utf-8")
+                return {"status": response.status, "data": json.loads(body) if body else {}}
+                
+        except urllib.error.HTTPError as e:
+            body = e.read().decode("utf-8") if e.fp else ""
+            try:
+                error_data = json.loads(body) if body else {}
+            except json.JSONDecodeError:
+                error_data = {"message": body}
+            return {"status": e.code, "error": error_data}
+        except urllib.error.URLError as e:
+            return {"status": 0, "error": {"message": f"Connection error: {e.reason}"}}
+        except Exception as e:
+            return {"status": 0, "error": {"message": str(e)}}

src/praisonai/praisonai/endpoints/providers/mcp.py

@@ -0,0 +1,263 @@
+"""
+MCP Provider
+
+Provider adapter for MCP server endpoints (stdio, http, sse).
+"""
+
+from typing import Any, Dict, Iterator, List, Optional
+
+from .base import BaseProvider, InvokeResult, HealthResult
+from ..discovery import EndpointInfo, ProviderInfo
+
+
+class MCPProvider(BaseProvider):
+    """
+    Provider adapter for MCP server endpoints.
+    
+    Supports multiple MCP transport types:
+    - stdio: Standard input/output (requires subprocess)
+    - http: HTTP-based MCP server
+    - sse: Server-Sent Events MCP gateway
+    """
+    
+    provider_type = "mcp"
+    
+    def __init__(
+        self,
+        base_url: str = "http://localhost:8765",
+        api_key: Optional[str] = None,
+        timeout: float = 30.0,
+        transport: str = "http",
+        command: Optional[str] = None,
+        args: Optional[List[str]] = None,
+        env: Optional[Dict[str, str]] = None,
+    ):
+        """
+        Initialize MCP provider.
+        
+        Args:
+            base_url: Base URL for HTTP/SSE transport
+            api_key: Optional API key
+            timeout: Request timeout
+            transport: Transport type (stdio, http, sse)
+            command: Command for stdio transport
+            args: Command arguments for stdio transport
+            env: Environment variables for stdio transport
+        """
+        super().__init__(base_url, api_key, timeout)
+        self.transport = transport
+        self.command = command
+        self.args = args or []
+        self.env = env or {}
+    
+    def get_provider_info(self) -> ProviderInfo:
+        """Get provider information."""
+        return ProviderInfo(
+            type=self.provider_type,
+            name="MCP Server",
+            description=f"MCP server ({self.transport} transport)",
+            capabilities=["list-tools", "call-tool", "list-resources"],
+        )
+    
+    def list_endpoints(self, tags: Optional[List[str]] = None) -> List[EndpointInfo]:
+        """List available MCP tools as endpoints."""
+        if self.transport == "stdio":
+            return self._list_stdio_tools(tags)
+        else:
+            return self._list_http_tools(tags)
+    
+    def _list_stdio_tools(self, tags: Optional[List[str]] = None) -> List[EndpointInfo]:
+        """List tools from stdio MCP server."""
+        try:
+            from praisonaiagents.mcp import MCP
+            
+            mcp = MCP(command=self.command, args=self.args, env=self.env)
+            tools = mcp.get_tools()
+            
+            endpoints = []
+            for tool in tools:
+                tool_name = getattr(tool, 'name', str(tool))
+                tool_desc = getattr(tool, 'description', '')
+                
+                endpoints.append(EndpointInfo(
+                    name=tool_name,
+                    description=tool_desc,
+                    provider_type=self.provider_type,
+                    streaming=["mcp-stream"],
+                    auth_modes=["none"],
+                    metadata={"transport": "stdio"},
+                ))
+            
+            return endpoints
+        except Exception:
+            return []
+    
+    def _list_http_tools(self, tags: Optional[List[str]] = None) -> List[EndpointInfo]:
+        """List tools from HTTP MCP server."""
+        # Try unified discovery first
+        result = self._make_request("GET", "/__praisonai__/discovery")
+        
+        if not result.get("error") and result.get("data"):
+            data = result.get("data", {})
+            endpoints = []
+            for ep in data.get("endpoints", []):
+                if ep.get("provider_type") == self.provider_type:
+                    endpoints.append(EndpointInfo(
+                        name=ep.get("name", ""),
+                        description=ep.get("description", ""),
+                        provider_type=self.provider_type,
+                        tags=ep.get("tags", []),
+                        streaming=ep.get("streaming", ["mcp-stream"]),
+                        auth_modes=ep.get("auth_modes", ["none"]),
+                    ))
+            return endpoints
+        
+        # Fallback: try MCP tools endpoint
+        result = self._make_request("GET", "/mcp/tools")
+        
+        if result.get("error"):
+            return []
+        
+        tools = result.get("data", {}).get("tools", [])
+        endpoints = []
+        
+        for tool in tools:
+            endpoints.append(EndpointInfo(
+                name=tool.get("name", ""),
+                description=tool.get("description", ""),
+                provider_type=self.provider_type,
+                input_schema=tool.get("inputSchema"),
+                streaming=["mcp-stream"],
+                auth_modes=["none"],
+            ))
+        
+        return endpoints
+    
+    def describe_endpoint(self, name: str) -> Optional[EndpointInfo]:
+        """Get detailed information about an MCP tool."""
+        endpoints = self.list_endpoints()
+        for ep in endpoints:
+            if ep.name == name:
+                return ep
+        return None
+    
+    def invoke(
+        self,
+        name: str,
+        input_data: Optional[Dict[str, Any]] = None,
+        config: Optional[Dict[str, Any]] = None,
+        stream: bool = False,
+    ) -> InvokeResult:
+        """Invoke an MCP tool."""
+        if self.transport == "stdio":
+            return self._invoke_stdio(name, input_data)
+        else:
+            return self._invoke_http(name, input_data)
+    
+    def _invoke_stdio(self, name: str, input_data: Optional[Dict[str, Any]] = None) -> InvokeResult:
+        """Invoke tool via stdio MCP."""
+        try:
+            from praisonaiagents.mcp import MCP
+            
+            mcp = MCP(command=self.command, args=self.args, env=self.env)
+            tools = mcp.get_tools()
+            
+            for tool in tools:
+                tool_name = getattr(tool, 'name', str(tool))
+                if tool_name == name:
+                    if callable(tool):
+                        result = tool(**(input_data or {}))
+                        return InvokeResult(
+                            ok=True,
+                            status="success",
+                            data=result,
+                        )
+            
+            return InvokeResult(
+                ok=False,
+                status="not_found",
+                error=f"Tool not found: {name}",
+            )
+        except Exception as e:
+            return InvokeResult(
+                ok=False,
+                status="error",
+                error=str(e),
+            )
+    
+    def _invoke_http(self, name: str, input_data: Optional[Dict[str, Any]] = None) -> InvokeResult:
+        """Invoke tool via HTTP MCP."""
+        body = {
+            "tool": name,
+            "arguments": input_data or {},
+        }
+        
+        result = self._make_request("POST", "/mcp/tools/call", json_data=body)
+        
+        if result.get("error"):
+            return InvokeResult(
+                ok=False,
+                status="error",
+                error=result["error"].get("message", str(result["error"])),
+            )
+        
+        data = result.get("data", {})
+        return InvokeResult(
+            ok=True,
+            status="success",
+            data=data.get("result", data),
+        )
+    
+    def invoke_stream(
+        self,
+        name: str,
+        input_data: Optional[Dict[str, Any]] = None,
+        config: Optional[Dict[str, Any]] = None,
+    ) -> Iterator[Dict[str, Any]]:
+        """Invoke MCP tool with streaming."""
+        # MCP streaming is tool-specific; for now, wrap sync call
+        result = self.invoke(name, input_data, config)
+        if result.ok:
+            yield {"event": "result", "data": result.data}
+        else:
+            yield {"event": "error", "data": {"error": result.error}}
+    
+    def health(self) -> HealthResult:
+        """Check MCP server health."""
+        if self.transport == "stdio":
+            # For stdio, check if command exists
+            import shutil
+            if self.command and shutil.which(self.command):
+                return HealthResult(
+                    healthy=True,
+                    status="available",
+                    server_name=self.command,
+                    provider_type=self.provider_type,
+                    metadata={"transport": "stdio"},
+                )
+            return HealthResult(
+                healthy=False,
+                status="unavailable",
+                provider_type=self.provider_type,
+                metadata={"error": f"Command not found: {self.command}"},
+            )
+        
+        # HTTP health check
+        result = self._make_request("GET", "/health")
+        
+        if result.get("error"):
+            return HealthResult(
+                healthy=False,
+                status="unhealthy",
+                provider_type=self.provider_type,
+                metadata={"error": result["error"].get("message", str(result["error"]))},
+            )
+        
+        data = result.get("data", {})
+        return HealthResult(
+            healthy=True,
+            status="healthy",
+            server_name=data.get("server_name", "MCP Server"),
+            server_version=data.get("version"),
+            provider_type=self.provider_type,
+        )

src/praisonai/praisonai/endpoints/providers/recipe.py

@@ -0,0 +1,206 @@
+"""
+Recipe Provider
+
+Provider adapter for recipe runner endpoints.
+"""
+
+from typing import Any, Dict, Iterator, List, Optional
+
+from .base import BaseProvider, InvokeResult, HealthResult
+from ..discovery import EndpointInfo, ProviderInfo
+
+
+class RecipeProvider(BaseProvider):
+    """
+    Provider adapter for recipe runner endpoints.
+    
+    Connects to recipe runner server (Starlette-based) and provides
+    unified discovery and invocation interface.
+    """
+    
+    provider_type = "recipe"
+    
+    def get_provider_info(self) -> ProviderInfo:
+        """Get provider information."""
+        return ProviderInfo(
+            type=self.provider_type,
+            name="Recipe Runner",
+            description="Recipe execution endpoints",
+            capabilities=["list", "describe", "invoke", "stream", "validate"],
+        )
+    
+    def list_endpoints(self, tags: Optional[List[str]] = None) -> List[EndpointInfo]:
+        """List available recipe endpoints."""
+        path = "/v1/recipes"
+        if tags:
+            path += f"?tags={','.join(tags)}"
+        
+        result = self._make_request("GET", path)
+        
+        if result.get("error"):
+            return []
+        
+        recipes = result.get("data", {}).get("recipes", [])
+        endpoints = []
+        
+        for r in recipes:
+            endpoints.append(EndpointInfo(
+                name=r.get("name", ""),
+                description=r.get("description", ""),
+                provider_type=self.provider_type,
+                tags=r.get("tags", []),
+                version=r.get("version", "1.0.0"),
+                streaming=["none", "sse"],
+                auth_modes=["none", "api-key"],
+            ))
+        
+        return endpoints
+    
+    def describe_endpoint(self, name: str) -> Optional[EndpointInfo]:
+        """Get detailed information about a recipe endpoint."""
+        result = self._make_request("GET", f"/v1/recipes/{name}")
+        
+        if result.get("status") == 404 or result.get("error"):
+            return None
+        
+        data = result.get("data", {})
+        
+        # Get schema
+        schema_result = self._make_request("GET", f"/v1/recipes/{name}/schema")
+        schema_data = schema_result.get("data", {}) if not schema_result.get("error") else {}
+        
+        return EndpointInfo(
+            name=data.get("name", name),
+            description=data.get("description", ""),
+            provider_type=self.provider_type,
+            tags=data.get("tags", []),
+            version=data.get("version", "1.0.0"),
+            input_schema=schema_data.get("input_schema"),
+            output_schema=schema_data.get("output_schema"),
+            streaming=["none", "sse"],
+            auth_modes=["none", "api-key"],
+            metadata=data.get("metadata", {}),
+        )
+    
+    def invoke(
+        self,
+        name: str,
+        input_data: Optional[Dict[str, Any]] = None,
+        config: Optional[Dict[str, Any]] = None,
+        stream: bool = False,
+    ) -> InvokeResult:
+        """Invoke a recipe endpoint."""
+        body = {
+            "recipe": name,
+            "input": input_data or {},
+            "config": config or {},
+        }
+        
+        result = self._make_request("POST", "/v1/recipes/run", json_data=body)
+        
+        if result.get("status") == 401:
+            return InvokeResult(
+                ok=False,
+                status="auth_error",
+                error="Authentication required",
+            )
+        
+        if result.get("status") == 404:
+            return InvokeResult(
+                ok=False,
+                status="not_found",
+                error=f"Recipe not found: {name}",
+            )
+        
+        if result.get("error"):
+            return InvokeResult(
+                ok=False,
+                status="error",
+                error=result["error"].get("message", str(result["error"])),
+            )
+        
+        data = result.get("data", {})
+        return InvokeResult(
+            ok=data.get("ok", True),
+            status=data.get("status", "success"),
+            data=data.get("output"),
+            metadata={"run_id": data.get("run_id")},
+        )
+    
+    def invoke_stream(
+        self,
+        name: str,
+        input_data: Optional[Dict[str, Any]] = None,
+        config: Optional[Dict[str, Any]] = None,
+    ) -> Iterator[Dict[str, Any]]:
+        """Invoke a recipe endpoint with streaming."""
+        import json
+        import urllib.request
+        
+        body = {
+            "recipe": name,
+            "input": input_data or {},
+            "config": config or {},
+        }
+        
+        full_url = f"{self.base_url}/v1/recipes/stream"
+        
+        headers = {
+            "Content-Type": "application/json",
+            "Accept": "text/event-stream",
+        }
+        if self.api_key:
+            headers["X-API-Key"] = self.api_key
+        
+        data = json.dumps(body).encode("utf-8")
+        
+        try:
+            req = urllib.request.Request(full_url, data=data, headers=headers, method="POST")
+            
+            with urllib.request.urlopen(req, timeout=300) as response:
+                buffer = ""
+                for line in response:
+                    line = line.decode("utf-8")
+                    buffer += line
+                    
+                    if buffer.endswith("\n\n"):
+                        event_type = "message"
+                        event_data = ""
+                        
+                        for part in buffer.strip().split("\n"):
+                            if part.startswith("event:"):
+                                event_type = part[6:].strip()
+                            elif part.startswith("data:"):
+                                event_data = part[5:].strip()
+                        
+                        if event_data:
+                            try:
+                                yield {"event": event_type, "data": json.loads(event_data)}
+                            except json.JSONDecodeError:
+                                yield {"event": event_type, "data": event_data}
+                        
+                        buffer = ""
+                        
+        except Exception as e:
+            yield {"event": "error", "data": {"error": str(e)}}
+    
+    def health(self) -> HealthResult:
+        """Check recipe server health."""
+        result = self._make_request("GET", "/health")
+        
+        if result.get("error"):
+            return HealthResult(
+                healthy=False,
+                status="unhealthy",
+                provider_type=self.provider_type,
+                metadata={"error": result["error"].get("message", str(result["error"]))},
+            )
+        
+        data = result.get("data", {})
+        return HealthResult(
+            healthy=data.get("status") == "healthy",
+            status=data.get("status", "unknown"),
+            server_name=data.get("service"),
+            server_version=data.get("version"),
+            provider_type=self.provider_type,
+        )

src/praisonai/praisonai/endpoints/providers/tools_mcp.py

@@ -0,0 +1,150 @@
+"""
+Tools MCP Provider
+
+Provider adapter for tools exposed as MCP server.
+"""
+
+from typing import Any, Dict, Iterator, List, Optional
+
+from .base import BaseProvider, InvokeResult, HealthResult
+from ..discovery import EndpointInfo, ProviderInfo
+
+
+class ToolsMCPProvider(BaseProvider):
+    """
+    Provider adapter for tools exposed as MCP server.
+    
+    This provider connects to a ToolsMCPServer that exposes Python functions
+    as MCP tools.
+    """
+    
+    provider_type = "tools-mcp"
+    
+    def get_provider_info(self) -> ProviderInfo:
+        """Get provider information."""
+        return ProviderInfo(
+            type=self.provider_type,
+            name="Tools MCP Server",
+            description="Python tools exposed as MCP server",
+            capabilities=["list-tools", "call-tool"],
+        )
+    
+    def list_endpoints(self, tags: Optional[List[str]] = None) -> List[EndpointInfo]:
+        """List available tools as endpoints."""
+        # Try unified discovery first
+        result = self._make_request("GET", "/__praisonai__/discovery")
+        
+        if not result.get("error") and result.get("data"):
+            data = result.get("data", {})
+            endpoints = []
+            for ep in data.get("endpoints", []):
+                if ep.get("provider_type") == self.provider_type:
+                    endpoints.append(EndpointInfo(
+                        name=ep.get("name", ""),
+                        description=ep.get("description", ""),
+                        provider_type=self.provider_type,
+                        tags=ep.get("tags", []),
+                        input_schema=ep.get("input_schema"),
+                        streaming=ep.get("streaming", ["none"]),
+                        auth_modes=ep.get("auth_modes", ["none"]),
+                    ))
+            return endpoints
+        
+        # Fallback: try tools endpoint
+        result = self._make_request("GET", "/tools")
+        
+        if result.get("error"):
+            return []
+        
+        tools = result.get("data", {}).get("tools", [])
+        endpoints = []
+        
+        for tool in tools:
+            endpoints.append(EndpointInfo(
+                name=tool.get("name", ""),
+                description=tool.get("description", ""),
+                provider_type=self.provider_type,
+                input_schema=tool.get("input_schema"),
+                streaming=["none"],
+                auth_modes=["none"],
+            ))
+        
+        return endpoints
+    
+    def describe_endpoint(self, name: str) -> Optional[EndpointInfo]:
+        """Get detailed information about a tool."""
+        endpoints = self.list_endpoints()
+        for ep in endpoints:
+            if ep.name == name:
+                return ep
+        return None
+    
+    def invoke(
+        self,
+        name: str,
+        input_data: Optional[Dict[str, Any]] = None,
+        config: Optional[Dict[str, Any]] = None,
+        stream: bool = False,
+    ) -> InvokeResult:
+        """Invoke a tool."""
+        body = {
+            "tool": name,
+            "arguments": input_data or {},
+        }
+        
+        result = self._make_request("POST", "/tools/call", json_data=body)
+        
+        if result.get("status") == 404:
+            return InvokeResult(
+                ok=False,
+                status="not_found",
+                error=f"Tool not found: {name}",
+            )
+        
+        if result.get("error"):
+            return InvokeResult(
+                ok=False,
+                status="error",
+                error=result["error"].get("message", str(result["error"])),
+            )
+        
+        data = result.get("data", {})
+        return InvokeResult(
+            ok=True,
+            status="success",
+            data=data.get("result", data),
+        )
+    
+    def invoke_stream(
+        self,
+        name: str,
+        input_data: Optional[Dict[str, Any]] = None,
+        config: Optional[Dict[str, Any]] = None,
+    ) -> Iterator[Dict[str, Any]]:
+        """Invoke tool with streaming (wraps sync call)."""
+        result = self.invoke(name, input_data, config)
+        if result.ok:
+            yield {"event": "result", "data": result.data}
+        else:
+            yield {"event": "error", "data": {"error": result.error}}
+    
+    def health(self) -> HealthResult:
+        """Check tools server health."""
+        result = self._make_request("GET", "/health")
+        
+        if result.get("error"):
+            return HealthResult(
+                healthy=False,
+                status="unhealthy",
+                provider_type=self.provider_type,
+                metadata={"error": result["error"].get("message", str(result["error"]))},
+            )
+        
+        data = result.get("data", {})
+        return HealthResult(
+            healthy=True,
+            status="healthy",
+            server_name=data.get("server_name", "Tools MCP Server"),
+            server_version=data.get("version"),
+            provider_type=self.provider_type,
+        )

src/praisonai/praisonai/endpoints/registry.py

@@ -0,0 +1,131 @@
+"""
+Provider Registry
+
+Central registry for provider adapters.
+"""
+
+from typing import Dict, List, Optional, Type
+
+from .providers.base import BaseProvider
+
+
+# Global provider registry
+_providers: Dict[str, Type[BaseProvider]] = {}
+
+
+def register_provider(provider_type: str, provider_class: Type[BaseProvider]) -> None:
+    """
+    Register a provider class.
+    
+    Args:
+        provider_type: Provider type identifier
+        provider_class: Provider class to register
+    """
+    _providers[provider_type] = provider_class
+
+
+def get_provider(
+    provider_type: str,
+    base_url: str = "http://localhost:8765",
+    api_key: Optional[str] = None,
+    **kwargs,
+) -> Optional[BaseProvider]:
+    """
+    Get a provider instance by type.
+    
+    Args:
+        provider_type: Provider type identifier
+        base_url: Base URL for the provider
+        api_key: Optional API key
+        **kwargs: Additional provider-specific arguments
+        
+    Returns:
+        Provider instance or None if not found
+    """
+    # Lazy register built-in providers
+    _ensure_providers_registered()
+    
+    if provider_type not in _providers:
+        return None
+    
+    return _providers[provider_type](base_url=base_url, api_key=api_key, **kwargs)
+
+
+def list_provider_types() -> List[str]:
+    """
+    List all registered provider types.
+    
+    Returns:
+        List of provider type identifiers
+    """
+    _ensure_providers_registered()
+    return list(_providers.keys())
+
+
+def get_provider_class(provider_type: str) -> Optional[Type[BaseProvider]]:
+    """
+    Get a provider class by type.
+    
+    Args:
+        provider_type: Provider type identifier
+        
+    Returns:
+        Provider class or None if not found
+    """
+    _ensure_providers_registered()
+    return _providers.get(provider_type)
+
+
+def _ensure_providers_registered() -> None:
+    """Ensure built-in providers are registered."""
+    if _providers:
+        return
+    
+    # Lazy import and register built-in providers
+    from .providers.recipe import RecipeProvider
+    from .providers.agents_api import AgentsAPIProvider
+    from .providers.mcp import MCPProvider
+    from .providers.tools_mcp import ToolsMCPProvider
+    from .providers.a2a import A2AProvider
+    from .providers.a2u import A2UProvider
+    
+    register_provider("recipe", RecipeProvider)
+    register_provider("agents-api", AgentsAPIProvider)
+    register_provider("mcp", MCPProvider)
+    register_provider("tools-mcp", ToolsMCPProvider)
+    register_provider("a2a", A2AProvider)
+    register_provider("a2u", A2UProvider)
+
+
+class ProviderRegistry:
+    """
+    Provider registry class for managing provider instances.
+    
+    This class provides a more object-oriented interface to the provider registry.
+    """
+    
+    def __init__(self):
+        """Initialize the registry."""
+        _ensure_providers_registered()
+    
+    def get(
+        self,
+        provider_type: str,
+        base_url: str = "http://localhost:8765",
+        api_key: Optional[str] = None,
+        **kwargs,
+    ) -> Optional[BaseProvider]:
+        """Get a provider instance."""
+        return get_provider(provider_type, base_url, api_key, **kwargs)
+    
+    def register(self, provider_type: str, provider_class: Type[BaseProvider]) -> None:
+        """Register a provider class."""
+        register_provider(provider_type, provider_class)
+    
+    def list_types(self) -> List[str]:
+        """List all provider types."""
+        return list_provider_types()
+    
+    def get_class(self, provider_type: str) -> Optional[Type[BaseProvider]]:
+        """Get a provider class."""
+        return get_provider_class(provider_type)

src/praisonai/praisonai/endpoints/server.py

@@ -0,0 +1,161 @@
+"""
+Unified Server Utilities
+
+Provides utilities for adding discovery endpoints to any server.
+"""
+
+from typing import Any, List, Optional
+
+from .discovery import (
+    DiscoveryDocument,
+    EndpointInfo,
+    ProviderInfo,
+    SCHEMA_VERSION,
+    create_discovery_document,
+)
+
+
+def add_discovery_routes(
+    app: Any,
+    discovery: DiscoveryDocument,
+    path: str = "/__praisonai__/discovery",
+) -> None:
+    """
+    Add unified discovery routes to a Starlette/FastAPI application.
+    
+    Args:
+        app: Starlette or FastAPI application
+        discovery: DiscoveryDocument to serve
+        path: Path for discovery endpoint
+    """
+    try:
+        from starlette.responses import JSONResponse
+        from starlette.routing import Route
+    except ImportError:
+        # Try FastAPI
+        try:
+            from fastapi.responses import JSONResponse
+        except ImportError:
+            raise ImportError("Starlette or FastAPI required for discovery routes")
+    
+    async def discovery_handler(request):
+        """Return discovery document."""
+        return JSONResponse(discovery.to_dict())
+    
+    async def health_handler(request):
+        """Return health status with discovery info."""
+        return JSONResponse({
+            "status": "healthy",
+            "schema_version": SCHEMA_VERSION,
+            "server_name": discovery.server_name,
+            "server_version": discovery.server_version,
+            "providers": [p.type for p in discovery.providers],
+            "endpoint_count": len(discovery.endpoints),
+        })
+    
+    # Add routes based on app type
+    if hasattr(app, 'add_api_route'):
+        # FastAPI
+        app.add_api_route(path, discovery_handler, methods=["GET"])
+        if not _has_route(app, "/health"):
+            app.add_api_route("/health", health_handler, methods=["GET"])
+    elif hasattr(app, 'routes'):
+        # Starlette
+        app.routes.append(Route(path, discovery_handler, methods=["GET"]))
+        if not _has_route(app, "/health"):
+            app.routes.append(Route("/health", health_handler, methods=["GET"]))
+
+
+def _has_route(app: Any, path: str) -> bool:
+    """Check if app already has a route at path."""
+    if hasattr(app, 'routes'):
+        for route in app.routes:
+            if hasattr(route, 'path') and route.path == path:
+                return True
+    return False
+
+
+def create_unified_app(
+    providers: Optional[List[str]] = None,
+    server_name: str = "praisonai",
+    host: str = "127.0.0.1",
+    port: int = 8765,
+    cors_origins: Optional[List[str]] = None,
+    api_key: Optional[str] = None,
+) -> Any:
+    """
+    Create a unified server application with discovery support.
+    
+    Args:
+        providers: List of provider types to enable
+        server_name: Server name for discovery
+        host: Server host
+        port: Server port
+        cors_origins: CORS allowed origins
+        api_key: Optional API key for authentication
+        
+    Returns:
+        FastAPI application
+    """
+    try:
+        from fastapi import FastAPI
+        from fastapi.middleware.cors import CORSMiddleware
+    except ImportError:
+        raise ImportError("FastAPI required. Install with: pip install fastapi")
+    
+    # Create discovery document
+    discovery = create_discovery_document(server_name=server_name)
+    
+    # Create FastAPI app
+    app = FastAPI(
+        title=f"{server_name} Unified API",
+        description="Unified PraisonAI endpoints server",
+        version=discovery.server_version,
+    )
+    
+    # Add CORS if configured
+    if cors_origins:
+        app.add_middleware(
+            CORSMiddleware,
+            allow_origins=cors_origins,
+            allow_methods=["*"],
+            allow_headers=["*"],
+        )
+    
+    # Add discovery routes
+    add_discovery_routes(app, discovery)
+    
+    # Store discovery document for later modification
+    app.state.discovery = discovery
+    
+    return app
+
+
+def register_endpoint_to_discovery(
+    app: Any,
+    endpoint: EndpointInfo,
+) -> None:
+    """
+    Register an endpoint to the app's discovery document.
+    
+    Args:
+        app: FastAPI/Starlette app with discovery
+        endpoint: EndpointInfo to register
+    """
+    if hasattr(app, 'state') and hasattr(app.state, 'discovery'):
+        app.state.discovery.add_endpoint(endpoint)
+
+
+def register_provider_to_discovery(
+    app: Any,
+    provider: ProviderInfo,
+) -> None:
+    """
+    Register a provider to the app's discovery document.
+    
+    Args:
+        app: FastAPI/Starlette app with discovery
+        provider: ProviderInfo to register
+    """
+    if hasattr(app, 'state') and hasattr(app.state, 'discovery'):
+        app.state.discovery.add_provider(provider)

src/praisonai/praisonai/jobs/executor.py

@@ -203,7 +203,12 @@ class JobExecutor:
         Run the agent for a job.
         
         This is the core execution logic that runs the PraisonAI agent.
+        Supports both direct agent execution and recipe-based execution.
         """
+        # Check if this is a recipe job
+        if job.recipe_name:
+            return await self._run_recipe(job)
+        
         # Imports are done lazily in _run_praisonai_agents and _run_legacy_praisonai
         
         # Determine agent configuration
@@ -241,6 +246,50 @@ class JobExecutor:
                 except Exception:
                     pass
     
+    async def _run_recipe(self, job: Job) -> Any:
+        """Run a recipe-based job."""
+        try:
+            from praisonai.recipe.bridge import resolve, execute_resolved_recipe
+        except ImportError:
+            raise RuntimeError("Recipe execution requires praisonai.recipe module")
+        
+        # Update progress
+        job.update_progress(percentage=10.0, step=f"Resolving recipe: {job.recipe_name}")
+        await self.store.save(job)
+        await self._notify_progress(job)
+        
+        # Resolve the recipe
+        resolved = resolve(
+            job.recipe_name,
+            input_data=job.prompt,
+            config=job.recipe_config or {},
+            session_id=job.session_id,
+            options={'timeout_sec': job.timeout},
+        )
+        
+        # Update job with recipe info
+        job.agent_id = f"recipe:{resolved.name}"
+        job.run_id = resolved.run_id
+        
+        # Update progress
+        job.update_progress(percentage=20.0, step=f"Executing recipe: {resolved.name}")
+        await self.store.save(job)
+        await self._notify_progress(job)
+        
+        # Execute the recipe
+        loop = asyncio.get_event_loop()
+        result = await loop.run_in_executor(
+            None,
+            lambda: execute_resolved_recipe(resolved)
+        )
+        
+        # Update progress
+        job.update_progress(percentage=90.0, step="Finalizing")
+        await self.store.save(job)
+        await self._notify_progress(job)
+        
+        return result
+    
     async def _run_praisonai_agents(self, job: Job, agent_file: str) -> Any:
         """Run using praisonaiagents framework."""
         try:

src/praisonai/praisonai/jobs/models.py

@@ -25,12 +25,15 @@ class JobSubmitRequest(BaseModel):
     prompt: str = Field(..., description="The prompt or task for the agent")
     agent_file: Optional[str] = Field(None, description="Path to agents.yaml file")
     agent_yaml: Optional[str] = Field(None, description="Inline agent YAML configuration")
+    recipe_name: Optional[str] = Field(None, description="Recipe name to execute (mutually exclusive with agent_file)")
+    recipe_config: Optional[Dict[str, Any]] = Field(default_factory=dict, description="Recipe configuration overrides")
     framework: Optional[str] = Field("praisonai", description="Framework to use (praisonai, crewai, autogen)")
     config: Optional[Dict[str, Any]] = Field(default_factory=dict, description="Additional configuration")
     webhook_url: Optional[str] = Field(None, description="URL to POST results when complete")
     timeout: Optional[int] = Field(3600, description="Timeout in seconds (default: 1 hour)")
     session_id: Optional[str] = Field(None, description="Session ID for conversation continuity")
     idempotency_key: Optional[str] = Field(None, description="Idempotency key to prevent duplicate submissions")
+    idempotency_scope: Optional[str] = Field("none", description="Idempotency scope: none, session, global")
 
 
 class JobSubmitResponse(BaseModel):
@@ -96,12 +99,15 @@ class Job(BaseModel):
     prompt: str = Field(...)
     agent_file: Optional[str] = Field(None)
     agent_yaml: Optional[str] = Field(None)
+    recipe_name: Optional[str] = Field(None)
+    recipe_config: Dict[str, Any] = Field(default_factory=dict)
     framework: str = Field("praisonai")
     config: Dict[str, Any] = Field(default_factory=dict)
     webhook_url: Optional[str] = Field(None)
     timeout: int = Field(3600)
     session_id: Optional[str] = Field(None)
     idempotency_key: Optional[str] = Field(None)
+    idempotency_scope: str = Field("none")
     
     # Progress tracking
     progress_percentage: float = Field(0.0)

src/praisonai/praisonai/recipe/__init__.py

@@ -20,10 +20,17 @@ __all__ = [
     "validate",
     "list_recipes",
     "describe",
+    # Runtime Bridge API
+    "resolve",
+    "run_background",
+    "submit_job",
+    "schedule",
     # Data classes
     "RecipeResult",
     "RecipeEvent",
     "RecipeConfig",
+    "ResolvedRecipe",
+    "RuntimeConfig",
     # Exceptions
     "RecipeError",
     "RecipeNotFoundError",
@@ -99,5 +106,29 @@ def __getattr__(name):
         from .models import ExitCode
         _module_cache[name] = ExitCode
         return ExitCode
+    elif name == "resolve":
+        from .bridge import resolve
+        _module_cache[name] = resolve
+        return resolve
+    elif name == "run_background":
+        from .operations import run_background
+        _module_cache[name] = run_background
+        return run_background
+    elif name == "submit_job":
+        from .operations import submit_job
+        _module_cache[name] = submit_job
+        return submit_job
+    elif name == "schedule":
+        from .operations import schedule
+        _module_cache[name] = schedule
+        return schedule
+    elif name == "ResolvedRecipe":
+        from .bridge import ResolvedRecipe
+        _module_cache[name] = ResolvedRecipe
+        return ResolvedRecipe
+    elif name == "RuntimeConfig":
+        from .runtime import RuntimeConfig
+        _module_cache[name] = RuntimeConfig
+        return RuntimeConfig
     
     raise AttributeError(f"module {__name__!r} has no attribute {name!r}")

src/praisonai/praisonai/recipe/bridge.py

@@ -0,0 +1,278 @@
+"""
+Recipe Runtime Bridge.
+
+Provides unified recipe resolution and execution for operational runtimes:
+- Background tasks
+- Async jobs
+- Scheduled execution
+
+This module bridges the gap between recipes and operational features,
+keeping all glue code in the wrapper (praisonai) without modifying core SDK.
+"""
+
+import uuid
+import logging
+from dataclasses import dataclass, field
+from pathlib import Path
+from typing import Any, Dict, Iterator, List, Optional
+
+logger = logging.getLogger(__name__)
+
+
+@dataclass
+class ResolvedRecipe:
+    """
+    A fully resolved recipe ready for execution.
+    
+    Contains all information needed to execute a recipe in any runtime mode.
+    """
+    name: str
+    version: str
+    description: str
+    path: Path
+    
+    # Workflow/agents configuration
+    workflow_config: Dict[str, Any] = field(default_factory=dict)
+    agents_config: Dict[str, Any] = field(default_factory=dict)
+    
+    # User-provided input and config
+    input_data: Any = None
+    config: Dict[str, Any] = field(default_factory=dict)
+    
+    # Runtime configuration
+    runtime_config: Optional[Any] = None  # RuntimeConfig
+    
+    # Execution context
+    session_id: Optional[str] = None
+    run_id: str = field(default_factory=lambda: f"run_{uuid.uuid4().hex[:12]}")
+    
+    # Options
+    options: Dict[str, Any] = field(default_factory=dict)
+    
+    def get_timeout_sec(self, default: int = 300) -> int:
+        """Get timeout from runtime config or options."""
+        if self.options.get('timeout_sec'):
+            return self.options['timeout_sec']
+        if self.runtime_config and hasattr(self.runtime_config, 'schedule'):
+            return self.runtime_config.schedule.timeout_sec
+        return default
+    
+    def get_max_cost_usd(self, default: float = 1.00) -> float:
+        """Get max cost from runtime config or options."""
+        if self.options.get('max_cost_usd'):
+            return self.options['max_cost_usd']
+        if self.runtime_config and hasattr(self.runtime_config, 'schedule'):
+            return self.runtime_config.schedule.max_cost_usd
+        return default
+
+
+def resolve(
+    name: str,
+    input_data: Any = None,
+    config: Optional[Dict[str, Any]] = None,
+    session_id: Optional[str] = None,
+    options: Optional[Dict[str, Any]] = None,
+) -> ResolvedRecipe:
+    """
+    Resolve a recipe name into a fully executable ResolvedRecipe.
+    
+    Args:
+        name: Recipe name or path
+        input_data: User input for the recipe
+        config: Configuration overrides
+        session_id: Session ID for conversation continuity
+        options: Execution options (timeout_sec, verbose, etc.)
+        
+    Returns:
+        ResolvedRecipe ready for execution
+        
+    Raises:
+        RecipeNotFoundError: If recipe cannot be found
+        RecipeValidationError: If recipe is invalid
+    """
+    from praisonai.templates import TemplateLoader
+    from praisonai.recipe.exceptions import RecipeNotFoundError
+    
+    options = options or {}
+    config = config or {}
+    
+    loader = TemplateLoader(offline=options.get('offline', False))
+    
+    try:
+        # Load template configuration
+        template_config = loader.load(name, config=config, offline=options.get('offline', False))
+    except Exception as e:
+        # Try to find similar recipes for helpful error message
+        try:
+            from praisonai.recipe.core import list_recipes
+            available = list_recipes()
+            suggestions = _find_similar_recipes(name, [r.name for r in available])
+            if suggestions:
+                raise RecipeNotFoundError(
+                    f"Recipe '{name}' not found. Did you mean: {', '.join(suggestions[:3])}?"
+                )
+        except Exception:
+            pass
+        raise RecipeNotFoundError(f"Recipe '{name}' not found: {e}")
+    
+    # Load workflow and agents configs
+    try:
+        workflow_config = loader.load_workflow_config(template_config)
+    except Exception:
+        workflow_config = {}
+    
+    try:
+        agents_config = loader.load_agents_config(template_config)
+    except Exception:
+        agents_config = {}
+    
+    # Generate session_id if not provided
+    if not session_id:
+        session_id = f"session_{uuid.uuid4().hex[:8]}"
+    
+    return ResolvedRecipe(
+        name=template_config.name,
+        version=template_config.version,
+        description=template_config.description,
+        path=template_config.path,
+        workflow_config=workflow_config,
+        agents_config=agents_config,
+        input_data=input_data,
+        config={**template_config.defaults, **config},
+        runtime_config=template_config.runtime,
+        session_id=session_id,
+        options=options,
+    )
+
+
+def execute_resolved_recipe(
+    resolved: ResolvedRecipe,
+    progress_callback: Optional[callable] = None,
+) -> Any:
+    """
+    Execute a resolved recipe and return the result.
+    
+    This is the canonical execution function used by all runtime modes.
+    
+    Args:
+        resolved: Resolved recipe to execute
+        progress_callback: Optional callback for progress updates
+        
+    Returns:
+        Recipe execution result
+    """
+    from praisonai.recipe.core import run
+    
+    # Build options dict
+    options = {
+        'timeout_sec': resolved.get_timeout_sec(),
+        'verbose': resolved.options.get('verbose', False),
+        'dry_run': resolved.options.get('dry_run', False),
+        **resolved.options,
+    }
+    
+    # Execute using core recipe.run
+    result = run(
+        resolved.name,
+        input=resolved.input_data,
+        config=resolved.config,
+        session_id=resolved.session_id,
+        options=options,
+    )
+    
+    return result
+
+
+def execute_resolved_recipe_stream(
+    resolved: ResolvedRecipe,
+    progress_callback: Optional[callable] = None,
+) -> Iterator[Any]:
+    """
+    Execute a resolved recipe with streaming output.
+    
+    Args:
+        resolved: Resolved recipe to execute
+        progress_callback: Optional callback for progress updates
+        
+    Yields:
+        RecipeEvent objects during execution
+    """
+    from praisonai.recipe.core import run_stream
+    
+    # Build options dict
+    options = {
+        'timeout_sec': resolved.get_timeout_sec(),
+        'verbose': resolved.options.get('verbose', False),
+        **resolved.options,
+    }
+    
+    # Execute using core recipe.run_stream
+    for event in run_stream(
+        resolved.name,
+        input=resolved.input_data,
+        config=resolved.config,
+        session_id=resolved.session_id,
+        options=options,
+    ):
+        if progress_callback:
+            try:
+                progress_callback(event)
+            except Exception as e:
+                logger.warning(f"Progress callback error: {e}")
+        yield event
+
+
+def _find_similar_recipes(name: str, available: List[str], max_results: int = 5) -> List[str]:
+    """Find recipes with similar names using simple string matching."""
+    name_lower = name.lower()
+    
+    # Exact prefix match
+    prefix_matches = [r for r in available if r.lower().startswith(name_lower)]
+    
+    # Contains match
+    contains_matches = [r for r in available if name_lower in r.lower() and r not in prefix_matches]
+    
+    # Levenshtein-like similarity (simplified)
+    def similarity(a: str, b: str) -> float:
+        a, b = a.lower(), b.lower()
+        if a == b:
+            return 1.0
+        if a in b or b in a:
+            return 0.8
+        # Count common characters
+        common = sum(1 for c in a if c in b)
+        return common / max(len(a), len(b))
+    
+    other_matches = sorted(
+        [r for r in available if r not in prefix_matches and r not in contains_matches],
+        key=lambda r: similarity(name, r),
+        reverse=True
+    )
+    
+    results = prefix_matches + contains_matches + other_matches
+    return results[:max_results]
+
+
+# Convenience functions for different runtime modes
+
+def get_recipe_task_description(resolved: ResolvedRecipe) -> str:
+    """Get a task description suitable for scheduler/background."""
+    if resolved.input_data:
+        if isinstance(resolved.input_data, str):
+            return resolved.input_data
+        elif isinstance(resolved.input_data, dict):
+            return str(resolved.input_data.get('prompt', resolved.input_data.get('task', str(resolved.input_data))))
+    return f"Execute recipe: {resolved.name}"
+
+
+def get_recipe_metadata(resolved: ResolvedRecipe) -> Dict[str, Any]:
+    """Get metadata dict for job/scheduler state persistence."""
+    return {
+        'recipe_name': resolved.name,
+        'recipe_version': resolved.version,
+        'recipe_path': str(resolved.path) if resolved.path else None,
+        'session_id': resolved.session_id,
+        'run_id': resolved.run_id,
+        'config': resolved.config,
+        'options': resolved.options,
+    }

src/praisonai/praisonai/recipe/core.py

@@ -59,6 +59,86 @@ def _get_timestamp() -> str:
     return datetime.now(timezone.utc).isoformat()
 
 
+def get_template_search_paths() -> List[Path]:
+    """
+    Get list of paths to search for recipe templates.
+    
+    Precedence order:
+    1. PRAISONAI_RECIPE_PATH environment variable (colon-separated)
+    2. Current working directory ./recipes
+    3. User home ~/.praison/recipes
+    4. Agent-Recipes package templates (if installed)
+    5. Built-in templates
+    
+    Returns:
+        List of Path objects to search for templates
+    """
+    paths = []
+    
+    # 1. Environment variable
+    env_path = os.environ.get("PRAISONAI_RECIPE_PATH")
+    if env_path:
+        for p in env_path.split(os.pathsep):
+            path = Path(p).expanduser()
+            if path.exists():
+                paths.append(path)
+    
+    # 2. Current working directory
+    cwd_recipes = Path.cwd() / "recipes"
+    if cwd_recipes.exists():
+        paths.append(cwd_recipes)
+    
+    # 3. User home
+    home_recipes = Path.home() / ".praison" / "recipes"
+    if home_recipes.exists():
+        paths.append(home_recipes)
+    
+    # 4. Agent-Recipes package (lazy import)
+    try:
+        import agent_recipes
+        if hasattr(agent_recipes, 'get_template_path'):
+            agent_path = Path(agent_recipes.get_template_path(""))
+            if agent_path.parent.exists():
+                paths.append(agent_path.parent)
+        elif hasattr(agent_recipes, '__file__'):
+            agent_templates = Path(agent_recipes.__file__).parent / "templates"
+            if agent_templates.exists():
+                paths.append(agent_templates)
+    except ImportError:
+        pass
+    
+    # 5. Built-in templates (relative to this package)
+    builtin = Path(__file__).parent.parent / "templates"
+    if builtin.exists():
+        paths.append(builtin)
+    
+    return paths
+
+
+def reload_registry():
+    """
+    Reload the recipe registry, clearing any cached templates.
+    
+    This is useful for hot-reloading recipes during development
+    or when using the /admin/reload endpoint.
+    """
+    global _recipe_cache
+    if '_recipe_cache' in globals():
+        _recipe_cache.clear()
+    
+    # Also clear any module-level caches
+    import importlib
+    try:
+        from praisonai import recipe as recipe_module
+        importlib.reload(recipe_module)
+    except Exception:
+        pass
+
+
+# Recipe cache for performance
+_recipe_cache: Dict[str, Any] = {}
+
+
 def run(
     name: str,
     input: Union[str, Dict[str, Any]] = None,

src/praisonai/praisonai/recipe/operations.py

@@ -0,0 +1,440 @@
+"""
+Recipe Operations Module.
+
+Provides high-level APIs for running recipes in different operational modes:
+- run_background(): Execute recipe as a background task
+- submit_job(): Submit recipe to async jobs server
+- schedule(): Create a scheduled recipe executor
+
+All functions are lazy-loaded and have zero performance impact when not used.
+"""
+
+import logging
+from dataclasses import dataclass, field
+from typing import Any, Dict, Optional
+
+logger = logging.getLogger(__name__)
+
+
+# Safe defaults
+DEFAULT_TIMEOUT_SEC = 300
+DEFAULT_MAX_COST_USD = 1.00
+DEFAULT_MAX_RETRIES = 3
+
+
+@dataclass
+class BackgroundTaskHandle:
+    """Handle for a background recipe task."""
+    task_id: str
+    recipe_name: str
+    session_id: Optional[str] = None
+    _runner: Any = field(default=None, repr=False)
+    _task: Any = field(default=None, repr=False)
+    
+    async def status(self) -> str:
+        """Get task status."""
+        if self._runner and self._task:
+            return self._task.status.value
+        return "unknown"
+    
+    async def wait(self, timeout: Optional[float] = None) -> Any:
+        """Wait for task completion and return result."""
+        if self._runner and self._task:
+            return await self._runner.wait_for_task(self._task.id, timeout=timeout)
+        return None
+    
+    async def cancel(self) -> bool:
+        """Cancel the task."""
+        if self._runner:
+            return await self._runner.cancel(self.task_id)
+        return False
+
+
+@dataclass
+class JobHandle:
+    """Handle for an async job."""
+    job_id: str
+    recipe_name: str
+    status: str = "queued"
+    poll_url: Optional[str] = None
+    stream_url: Optional[str] = None
+    api_url: str = "http://127.0.0.1:8005"
+    
+    def get_status(self) -> Dict[str, Any]:
+        """Get job status from API."""
+        try:
+            import httpx
+            with httpx.Client(timeout=30.0) as client:
+                response = client.get(f"{self.api_url}/api/v1/runs/{self.job_id}")
+                response.raise_for_status()
+                return response.json()
+        except Exception as e:
+            logger.error(f"Failed to get job status: {e}")
+            return {"job_id": self.job_id, "status": "unknown", "error": str(e)}
+    
+    def get_result(self) -> Any:
+        """Get job result from API."""
+        try:
+            import httpx
+            with httpx.Client(timeout=30.0) as client:
+                response = client.get(f"{self.api_url}/api/v1/runs/{self.job_id}/result")
+                response.raise_for_status()
+                return response.json()
+        except Exception as e:
+            logger.error(f"Failed to get job result: {e}")
+            return {"job_id": self.job_id, "error": str(e)}
+    
+    def cancel(self) -> bool:
+        """Cancel the job."""
+        try:
+            import httpx
+            with httpx.Client(timeout=30.0) as client:
+                response = client.post(f"{self.api_url}/api/v1/runs/{self.job_id}/cancel")
+                return response.status_code < 400
+        except Exception as e:
+            logger.error(f"Failed to cancel job: {e}")
+            return False
+    
+    def wait(self, poll_interval: int = 5, timeout: Optional[int] = None) -> Dict[str, Any]:
+        """Wait for job completion by polling."""
+        import time
+        start_time = time.time()
+        
+        while True:
+            status = self.get_status()
+            if status.get("status") in ("succeeded", "failed", "cancelled"):
+                return self.get_result()
+            
+            if timeout and (time.time() - start_time) > timeout:
+                return {"job_id": self.job_id, "status": "timeout", "error": "Wait timeout exceeded"}
+            
+            time.sleep(poll_interval)
+
+
+@dataclass
+class RecipeScheduler:
+    """Wrapper around AgentScheduler for recipe-based scheduling."""
+    recipe_name: str
+    interval: str = "hourly"
+    max_retries: int = DEFAULT_MAX_RETRIES
+    timeout_sec: int = DEFAULT_TIMEOUT_SEC
+    max_cost_usd: float = DEFAULT_MAX_COST_USD
+    run_immediately: bool = False
+    _scheduler: Any = field(default=None, repr=False)
+    _resolved: Any = field(default=None, repr=False)
+    
+    def start(self) -> bool:
+        """Start the scheduler."""
+        if self._scheduler:
+            return self._scheduler.start(
+                schedule_expr=self.interval,
+                max_retries=self.max_retries,
+                run_immediately=self.run_immediately
+            )
+        return False
+    
+    def stop(self) -> bool:
+        """Stop the scheduler."""
+        if self._scheduler:
+            return self._scheduler.stop()
+        return False
+    
+    def get_stats(self) -> Dict[str, Any]:
+        """Get scheduler statistics."""
+        if self._scheduler:
+            return self._scheduler.get_stats()
+        return {}
+    
+    @property
+    def is_running(self) -> bool:
+        """Check if scheduler is running."""
+        if self._scheduler:
+            return self._scheduler.is_running
+        return False
+
+
+def run_background(
+    name: str,
+    *,
+    input: Any = None,
+    config: Optional[Dict[str, Any]] = None,
+    session_id: Optional[str] = None,
+    timeout_sec: Optional[int] = None,
+    max_concurrent: int = 5,
+    on_complete: Optional[callable] = None,
+) -> BackgroundTaskHandle:
+    """
+    Run a recipe as a background task.
+    
+    Args:
+        name: Recipe name
+        input: Input data for the recipe
+        config: Configuration overrides
+        session_id: Session ID for conversation continuity
+        timeout_sec: Timeout in seconds (default: 300)
+        max_concurrent: Max concurrent tasks (default: 5)
+        on_complete: Callback when task completes
+        
+    Returns:
+        BackgroundTaskHandle for tracking the task
+        
+    Example:
+        task = recipe.run_background("my-recipe", input={"query": "test"})
+        print(f"Task ID: {task.task_id}")
+        result = await task.wait()
+    """
+    import asyncio
+    from .bridge import resolve, execute_resolved_recipe
+    
+    # Resolve the recipe
+    resolved = resolve(
+        name,
+        input_data=input,
+        config=config,
+        session_id=session_id,
+        options={'timeout_sec': timeout_sec or DEFAULT_TIMEOUT_SEC},
+    )
+    
+    # Import BackgroundRunner lazily
+    try:
+        from praisonaiagents.background import BackgroundRunner
+    except ImportError:
+        raise RuntimeError(
+            "Background tasks require praisonaiagents. "
+            "Install with: pip install praisonaiagents"
+        )
+    
+    # Create or get runner
+    runner = BackgroundRunner(max_concurrent_tasks=max_concurrent)
+    
+    # Define the task function
+    def recipe_task():
+        return execute_resolved_recipe(resolved)
+    
+    # Submit the task
+    loop = asyncio.get_event_loop()
+    if loop.is_running():
+        # We're in an async context, use create_task
+        import concurrent.futures
+        future = concurrent.futures.Future()
+        
+        async def submit_and_return():
+            task = await runner.submit(
+                recipe_task,
+                name=f"recipe:{resolved.name}",
+                timeout=timeout_sec,
+                on_complete=on_complete,
+            )
+            return task
+        
+        asyncio.ensure_future(submit_and_return()).add_done_callback(
+            lambda f: future.set_result(f.result())
+        )
+        task = future.result(timeout=10)
+    else:
+        # Sync context
+        task = loop.run_until_complete(runner.submit(
+            recipe_task,
+            name=f"recipe:{resolved.name}",
+            timeout=timeout_sec,
+            on_complete=on_complete,
+        ))
+    
+    return BackgroundTaskHandle(
+        task_id=task.id,
+        recipe_name=resolved.name,
+        session_id=resolved.session_id,
+        _runner=runner,
+        _task=task,
+    )
+
+
+def submit_job(
+    name: str,
+    *,
+    input: Any = None,
+    config: Optional[Dict[str, Any]] = None,
+    session_id: Optional[str] = None,
+    timeout_sec: Optional[int] = None,
+    idempotency_key: Optional[str] = None,
+    webhook_url: Optional[str] = None,
+    api_url: str = "http://127.0.0.1:8005",
+    wait: bool = False,
+    poll_interval: int = 5,
+) -> JobHandle:
+    """
+    Submit a recipe to the async jobs server.
+    
+    Args:
+        name: Recipe name
+        input: Input data for the recipe
+        config: Configuration overrides
+        session_id: Session ID for conversation continuity
+        timeout_sec: Timeout in seconds (default: 3600)
+        idempotency_key: Key for deduplication
+        webhook_url: URL for completion webhook
+        api_url: Jobs API URL (default: http://127.0.0.1:8005)
+        wait: If True, wait for completion before returning
+        poll_interval: Polling interval when waiting (seconds)
+        
+    Returns:
+        JobHandle for tracking the job
+        
+    Example:
+        job = recipe.submit_job("my-recipe", input={"query": "test"}, wait=True)
+        print(f"Result: {job.get_result()}")
+    """
+    try:
+        import httpx
+    except ImportError:
+        raise RuntimeError(
+            "Job submission requires httpx. "
+            "Install with: pip install httpx"
+        )
+    
+    # Build request payload
+    payload = {
+        "prompt": str(input) if input else f"Execute recipe: {name}",
+        "recipe_name": name,
+        "timeout": timeout_sec or 3600,
+    }
+    
+    if config:
+        payload["config"] = config
+    if session_id:
+        payload["session_id"] = session_id
+    if idempotency_key:
+        payload["idempotency_key"] = idempotency_key
+    if webhook_url:
+        payload["webhook_url"] = webhook_url
+    
+    # Submit to API
+    with httpx.Client(timeout=30.0) as client:
+        response = client.post(
+            f"{api_url}/api/v1/runs",
+            json=payload,
+        )
+        response.raise_for_status()
+        data = response.json()
+    
+    handle = JobHandle(
+        job_id=data["job_id"],
+        recipe_name=name,
+        status=data.get("status", "queued"),
+        poll_url=data.get("poll_url"),
+        stream_url=data.get("stream_url"),
+        api_url=api_url,
+    )
+    
+    if wait:
+        handle.wait(poll_interval=poll_interval, timeout=timeout_sec)
+    
+    return handle
+
+
+def schedule(
+    name: str,
+    *,
+    input: Any = None,
+    config: Optional[Dict[str, Any]] = None,
+    interval: Optional[str] = None,
+    max_retries: Optional[int] = None,
+    run_immediately: Optional[bool] = None,
+    timeout_sec: Optional[int] = None,
+    max_cost_usd: Optional[float] = None,
+    on_success: Optional[callable] = None,
+    on_failure: Optional[callable] = None,
+) -> RecipeScheduler:
+    """
+    Create a scheduler for periodic recipe execution.
+    
+    Args:
+        name: Recipe name
+        input: Input data for the recipe
+        config: Configuration overrides
+        interval: Schedule interval (hourly, daily, */30m, etc.)
+        max_retries: Max retry attempts (default: 3)
+        run_immediately: Run once immediately (default: False)
+        timeout_sec: Timeout per execution (default: 300)
+        max_cost_usd: Budget limit (default: $1.00)
+        on_success: Callback on successful execution
+        on_failure: Callback on failed execution
+        
+    Returns:
+        RecipeScheduler instance (call .start() to begin)
+        
+    Example:
+        scheduler = recipe.schedule("news-monitor", interval="hourly")
+        scheduler.start()
+        # ... later ...
+        scheduler.stop()
+    """
+    from .bridge import resolve, execute_resolved_recipe, get_recipe_task_description
+    
+    # Resolve the recipe
+    resolved = resolve(
+        name,
+        input_data=input,
+        config=config,
+        options={'timeout_sec': timeout_sec or DEFAULT_TIMEOUT_SEC},
+    )
+    
+    # Get runtime config defaults
+    runtime = resolved.runtime_config
+    if runtime and hasattr(runtime, 'schedule'):
+        sched_config = runtime.schedule
+        interval = interval or sched_config.interval
+        max_retries = max_retries if max_retries is not None else sched_config.max_retries
+        run_immediately = run_immediately if run_immediately is not None else sched_config.run_immediately
+        timeout_sec = timeout_sec or sched_config.timeout_sec
+        max_cost_usd = max_cost_usd if max_cost_usd is not None else sched_config.max_cost_usd
+    
+    # Apply defaults
+    interval = interval or "hourly"
+    max_retries = max_retries if max_retries is not None else DEFAULT_MAX_RETRIES
+    run_immediately = run_immediately if run_immediately is not None else False
+    timeout_sec = timeout_sec or DEFAULT_TIMEOUT_SEC
+    max_cost_usd = max_cost_usd if max_cost_usd is not None else DEFAULT_MAX_COST_USD
+    
+    # Import AgentScheduler lazily
+    try:
+        from praisonai.scheduler import AgentScheduler
+    except ImportError:
+        raise RuntimeError(
+            "Scheduling requires praisonai scheduler module."
+        )
+    
+    # Create a recipe executor agent wrapper
+    class RecipeExecutorAgent:
+        """Wrapper that makes a recipe look like an agent for the scheduler."""
+        def __init__(self, resolved_recipe):
+            self.resolved = resolved_recipe
+            self.name = f"RecipeAgent:{resolved_recipe.name}"
+        
+        def start(self, task: str) -> Any:
+            return execute_resolved_recipe(self.resolved)
+    
+    # Create the agent wrapper
+    agent = RecipeExecutorAgent(resolved)
+    task = get_recipe_task_description(resolved)
+    
+    # Create the scheduler
+    scheduler = AgentScheduler(
+        agent=agent,
+        task=task,
+        timeout=timeout_sec,
+        max_cost=max_cost_usd,
+        on_success=on_success,
+        on_failure=on_failure,
+    )
+    
+    return RecipeScheduler(
+        recipe_name=resolved.name,
+        interval=interval,
+        max_retries=max_retries,
+        timeout_sec=timeout_sec,
+        max_cost_usd=max_cost_usd,
+        run_immediately=run_immediately,
+        _scheduler=scheduler,
+        _resolved=resolved,
+    )

src/praisonai/praisonai/recipe/registry.py

@@ -4,8 +4,10 @@ Recipe Registry Module
 Provides local and remote registry support for recipe distribution.
 Supports:
 - Local filesystem registry (~/.praison/registry)
-- Remote HTTP registry (optional)
+- Local HTTP registry (http://localhost:7777)
+- Remote HTTP registry (https://registry.example.com)
 - Publish, pull, search, list operations
+- Atomic writes and file locking for concurrency safety
 """
 
 import hashlib
@@ -13,15 +15,18 @@ import json
 import os
 import shutil
 import tarfile
+import tempfile
+import re
 from datetime import datetime, timezone
 from pathlib import Path
-from typing import Any, Dict, List, Optional, Union
+from typing import Any, Dict, List, Optional, Union, Protocol
 from urllib.parse import urlparse
 
 
 # Default registry paths
 DEFAULT_REGISTRY_PATH = Path.home() / ".praison" / "registry"
 DEFAULT_RUNS_PATH = Path.home() / ".praison" / "runs"
+DEFAULT_REGISTRY_PORT = 7777
 
 
 class RegistryError(Exception):
@@ -44,6 +49,52 @@ class RegistryAuthError(RegistryError):
     pass
 
 
+class RegistryNetworkError(RegistryError):
+    """Network error connecting to registry."""
+    pass
+
+
+class RegistryConflictError(RegistryError):
+    """Conflict error (e.g., already exists without force)."""
+    pass
+
+
+class RegistryProtocol(Protocol):
+    """Protocol defining registry interface for type checking."""
+    
+    def publish(
+        self,
+        bundle_path: Union[str, Path],
+        force: bool = False,
+        metadata: Optional[Dict[str, Any]] = None,
+    ) -> Dict[str, Any]: ...
+    
+    def pull(
+        self,
+        name: str,
+        version: Optional[str] = None,
+        output_dir: Optional[Path] = None,
+        verify_checksum: bool = True,
+    ) -> Dict[str, Any]: ...
+    
+    def list_recipes(
+        self,
+        tags: Optional[List[str]] = None,
+    ) -> List[Dict[str, Any]]: ...
+    
+    def search(
+        self,
+        query: str,
+        tags: Optional[List[str]] = None,
+    ) -> List[Dict[str, Any]]: ...
+    
+    def get_versions(self, name: str) -> List[str]: ...
+    
+    def get_info(self, name: str, version: Optional[str] = None) -> Dict[str, Any]: ...
+    
+    def delete(self, name: str, version: Optional[str] = None) -> bool: ...
+
+
 def _get_timestamp() -> str:
     """Get current timestamp in ISO format."""
     return datetime.now(timezone.utc).isoformat()
@@ -58,6 +109,46 @@ def _calculate_checksum(file_path: Path) -> str:
     return sha256.hexdigest()
 
 
+def _normalize_name(name: str) -> str:
+    """Normalize recipe name per PEP 503 rules."""
+    return re.sub(r"[-_.]+", "-", name).lower()
+
+
+def _validate_name(name: str) -> bool:
+    """Validate recipe name format."""
+    if not name or len(name) > 128:
+        return False
+    return bool(re.match(r'^[a-zA-Z0-9]([a-zA-Z0-9._-]*[a-zA-Z0-9])?$', name))
+
+
+def _validate_version(version: str) -> bool:
+    """Validate version string (semver-like)."""
+    if not version:
+        return False
+    return bool(re.match(r'^\d+\.\d+\.\d+([a-zA-Z0-9._-]*)?$', version))
+
+
+def _atomic_write(file_path: Path, data: bytes) -> None:
+    """Write data atomically using temp file + rename."""
+    file_path.parent.mkdir(parents=True, exist_ok=True)
+    fd, tmp_path = tempfile.mkstemp(dir=file_path.parent, suffix='.tmp')
+    try:
+        os.write(fd, data)
+        os.fsync(fd)
+        os.close(fd)
+        os.rename(tmp_path, file_path)
+    except Exception:
+        os.close(fd)
+        if os.path.exists(tmp_path):
+            os.unlink(tmp_path)
+        raise
+
+
+def _atomic_write_json(file_path: Path, data: Dict[str, Any]) -> None:
+    """Write JSON data atomically."""
+    _atomic_write(file_path, json.dumps(data, indent=2).encode('utf-8'))
+
+
 class LocalRegistry:
     """
     Local filesystem-based recipe registry.
@@ -394,14 +485,18 @@ class LocalRegistry:
         return True
 
 
-class RemoteRegistry:
+class HttpRegistry:
     """
-    Remote HTTP-based recipe registry client.
+    HTTP-based recipe registry client.
+    
+    Works with both local HTTP registry (http://localhost:7777) and
+    remote HTTP registries (https://registry.example.com).
     
     Supports:
-    - Token-based authentication
-    - Publish/pull operations
-    - Search and list
+    - Token-based authentication (Bearer token)
+    - Multipart file upload for publish
+    - ETag/If-None-Match for efficient downloads
+    - Proper error handling with specific exceptions
     """
     
     def __init__(
@@ -411,50 +506,147 @@ class RemoteRegistry:
         timeout: int = 30,
     ):
         """
-        Initialize remote registry client.
+        Initialize HTTP registry client.
         
         Args:
-            url: Registry base URL
-            token: Authentication token
+            url: Registry base URL (http://localhost:7777 or https://...)
+            token: Authentication token (or set PRAISONAI_REGISTRY_TOKEN env var)
             timeout: Request timeout in seconds
         """
         self.url = url.rstrip("/")
         self.token = token or os.environ.get("PRAISONAI_REGISTRY_TOKEN")
         self.timeout = timeout
+        self._etag_cache: Dict[str, str] = {}
+    
+    def _get_headers(self, content_type: str = "application/json") -> Dict[str, str]:
+        """Get request headers with optional auth."""
+        headers = {"Content-Type": content_type}
+        if self.token:
+            headers["Authorization"] = f"Bearer {self.token}"
+        return headers
     
     def _request(
         self,
         method: str,
         path: str,
-        data: Optional[Dict] = None,
-        files: Optional[Dict] = None,
+        data: Optional[bytes] = None,
+        headers: Optional[Dict[str, str]] = None,
     ) -> Dict[str, Any]:
         """Make HTTP request to registry."""
         import urllib.request
         import urllib.error
         
         url = f"{self.url}{path}"
-        headers = {"Content-Type": "application/json"}
-        
-        if self.token:
-            headers["Authorization"] = f"Bearer {self.token}"
-        
-        body = json.dumps(data).encode() if data else None
+        req_headers = headers or self._get_headers()
         
         try:
-            req = urllib.request.Request(url, data=body, headers=headers, method=method)
+            req = urllib.request.Request(url, data=data, headers=req_headers, method=method)
             with urllib.request.urlopen(req, timeout=self.timeout) as response:
+                # Cache ETag for future requests
+                etag = response.headers.get("ETag")
+                if etag:
+                    self._etag_cache[path] = etag
                 return json.loads(response.read().decode())
         except urllib.error.HTTPError as e:
             if e.code == 401:
-                raise RegistryAuthError("Authentication failed")
+                raise RegistryAuthError("Authentication failed. Check your token.")
+            elif e.code == 403:
+                raise RegistryAuthError("Access denied. Token may lack required permissions.")
             elif e.code == 404:
                 raise RecipeNotFoundError(f"Not found: {path}")
+            elif e.code == 409:
+                raise RegistryConflictError("Recipe version already exists. Use --force to overwrite.")
             else:
                 body = e.read().decode() if e.fp else ""
                 raise RegistryError(f"Registry error ({e.code}): {body}")
         except urllib.error.URLError as e:
-            raise RegistryError(f"Connection error: {e.reason}")
+            raise RegistryNetworkError(f"Connection error: {e.reason}")
+    
+    def _download_file(self, path: str, dest_path: Path) -> Dict[str, Any]:
+        """Download file from registry with ETag support."""
+        import urllib.request
+        import urllib.error
+        
+        url = f"{self.url}{path}"
+        headers = self._get_headers()
+        
+        # Add If-None-Match if we have cached ETag
+        if path in self._etag_cache:
+            headers["If-None-Match"] = self._etag_cache[path]
+        
+        try:
+            req = urllib.request.Request(url, headers=headers, method="GET")
+            with urllib.request.urlopen(req, timeout=self.timeout) as response:
+                etag = response.headers.get("ETag")
+                if etag:
+                    self._etag_cache[path] = etag
+                
+                dest_path.parent.mkdir(parents=True, exist_ok=True)
+                with open(dest_path, "wb") as f:
+                    shutil.copyfileobj(response, f)
+                
+                return {"downloaded": True, "path": str(dest_path)}
+        except urllib.error.HTTPError as e:
+            if e.code == 304:
+                return {"downloaded": False, "cached": True}
+            elif e.code == 404:
+                raise RecipeNotFoundError(f"Not found: {path}")
+            else:
+                raise RegistryError(f"Download error ({e.code})")
+        except urllib.error.URLError as e:
+            raise RegistryNetworkError(f"Connection error: {e.reason}")
+    
+    def _upload_file(self, path: str, file_path: Path, force: bool = False) -> Dict[str, Any]:
+        """Upload file to registry using multipart form."""
+        import urllib.request
+        import urllib.error
+        import uuid
+        
+        boundary = f"----PraisonAI{uuid.uuid4().hex}"
+        
+        # Build multipart body
+        body_parts = []
+        
+        # Add force field
+        body_parts.append(f"--{boundary}".encode())
+        body_parts.append(b'Content-Disposition: form-data; name="force"')
+        body_parts.append(b"")
+        body_parts.append(b"true" if force else b"false")
+        
+        # Add file
+        body_parts.append(f"--{boundary}".encode())
+        body_parts.append(f'Content-Disposition: form-data; name="bundle"; filename="{file_path.name}"'.encode())
+        body_parts.append(b"Content-Type: application/gzip")
+        body_parts.append(b"")
+        with open(file_path, "rb") as f:
+            body_parts.append(f.read())
+        
+        body_parts.append(f"--{boundary}--".encode())
+        body_parts.append(b"")
+        
+        body = b"\r\n".join(body_parts)
+        
+        headers = self._get_headers(f"multipart/form-data; boundary={boundary}")
+        
+        url = f"{self.url}{path}"
+        try:
+            req = urllib.request.Request(url, data=body, headers=headers, method="POST")
+            with urllib.request.urlopen(req, timeout=self.timeout) as response:
+                return json.loads(response.read().decode())
+        except urllib.error.HTTPError as e:
+            if e.code == 401:
+                raise RegistryAuthError("Authentication required for publish")
+            elif e.code == 409:
+                raise RegistryConflictError("Recipe version already exists. Use --force to overwrite.")
+            else:
+                body_text = e.read().decode() if e.fp else ""
+                raise RegistryError(f"Upload error ({e.code}): {body_text}")
+        except urllib.error.URLError as e:
+            raise RegistryNetworkError(f"Connection error: {e.reason}")
+    
+    def health(self) -> Dict[str, Any]:
+        """Check registry health."""
+        return self._request("GET", "/healthz")
     
     def publish(
         self,
@@ -462,24 +654,39 @@ class RemoteRegistry:
         force: bool = False,
         metadata: Optional[Dict[str, Any]] = None,
     ) -> Dict[str, Any]:
-        """Publish bundle to remote registry."""
+        """
+        Publish bundle to HTTP registry.
+        
+        Args:
+            bundle_path: Path to .praison bundle file
+            force: Overwrite existing version if True
+            metadata: Additional metadata (ignored for HTTP, included in bundle)
+            
+        Returns:
+            Dict with name, version, checksum
+        """
         bundle_path = Path(bundle_path)
         if not bundle_path.exists():
             raise RegistryError(f"Bundle not found: {bundle_path}")
         
-        # For remote, we'd upload the file
-        # This is a simplified implementation
-        with open(bundle_path, "rb") as f:
-            bundle_data = f.read()
+        # Extract name/version from bundle to construct path
+        try:
+            with tarfile.open(bundle_path, "r:gz") as tar:
+                manifest_file = tar.extractfile("manifest.json")
+                if not manifest_file:
+                    raise RegistryError("Bundle missing manifest.json")
+                manifest = json.load(manifest_file)
+        except tarfile.TarError as e:
+            raise RegistryError(f"Invalid bundle format: {e}")
         
-        import base64
-        encoded = base64.b64encode(bundle_data).decode()
+        name = manifest.get("name")
+        version = manifest.get("version")
         
-        return self._request("POST", "/v1/recipes/publish", {
-            "bundle": encoded,
-            "force": force,
-            "metadata": metadata or {},
-        })
+        if not name or not version:
+            raise RegistryError("Bundle manifest missing name or version")
+        
+        # Upload to /v1/recipes/{name}/{version}
+        return self._upload_file(f"/v1/recipes/{name}/{version}", bundle_path, force=force)
     
     def pull(
         self,
@@ -488,20 +695,41 @@ class RemoteRegistry:
         output_dir: Optional[Path] = None,
         verify_checksum: bool = True,
     ) -> Dict[str, Any]:
-        """Pull recipe from remote registry."""
-        version_str = f"@{version}" if version else ""
-        result = self._request("GET", f"/v1/recipes/{name}{version_str}/download")
+        """
+        Pull recipe from HTTP registry.
         
-        # Decode and save bundle
-        import base64
-        bundle_data = base64.b64decode(result["bundle"])
+        Args:
+            name: Recipe name
+            version: Version to pull (default: latest)
+            output_dir: Directory to extract to
+            verify_checksum: Verify bundle checksum
+            
+        Returns:
+            Dict with name, version, path
+        """
+        # Get recipe info to determine version
+        if not version:
+            info = self._request("GET", f"/v1/recipes/{name}")
+            version = info.get("latest")
+            if not version:
+                raise RecipeNotFoundError(f"No versions found for: {name}")
         
         output_dir = Path(output_dir) if output_dir else Path.cwd()
-        output_dir.mkdir(parents=True, exist_ok=True)
+        bundle_path = output_dir / f"{name}-{version}.praison"
         
-        bundle_path = output_dir / f"{name}-{result['version']}.praison"
-        with open(bundle_path, "wb") as f:
-            f.write(bundle_data)
+        # Download bundle
+        download_path = f"/v1/recipes/{name}/{version}/download"
+        self._download_file(download_path, bundle_path)
+        
+        # Verify checksum if requested
+        if verify_checksum:
+            info = self._request("GET", f"/v1/recipes/{name}/{version}")
+            expected = info.get("checksum")
+            if expected:
+                actual = _calculate_checksum(bundle_path)
+                if expected != actual:
+                    bundle_path.unlink()
+                    raise RegistryError(f"Checksum mismatch for {name}@{version}")
         
         # Extract
         recipe_dir = output_dir / name
@@ -512,24 +740,87 @@ class RemoteRegistry:
         
         return {
             "name": name,
-            "version": result["version"],
+            "version": version,
             "path": str(recipe_dir),
             "bundle_path": str(bundle_path),
         }
     
-    def list_recipes(self, tags: Optional[List[str]] = None) -> List[Dict[str, Any]]:
-        """List recipes from remote registry."""
-        params = ""
-        if tags:
-            params = f"?tags={','.join(tags)}"
-        return self._request("GET", f"/v1/recipes{params}").get("recipes", [])
-    
-    def search(self, query: str, tags: Optional[List[str]] = None) -> List[Dict[str, Any]]:
-        """Search recipes in remote registry."""
-        params = f"?q={query}"
+    def list_recipes(
+        self,
+        tags: Optional[List[str]] = None,
+        page: int = 1,
+        per_page: int = 50,
+    ) -> List[Dict[str, Any]]:
+        """
+        List recipes from HTTP registry.
+        
+        Args:
+            tags: Filter by tags
+            page: Page number (1-indexed)
+            per_page: Results per page
+            
+        Returns:
+            List of recipe info dicts
+        """
+        params = f"?page={page}&per_page={per_page}"
         if tags:
             params += f"&tags={','.join(tags)}"
-        return self._request("GET", f"/v1/recipes/search{params}").get("results", [])
+        result = self._request("GET", f"/v1/recipes{params}")
+        return result.get("recipes", [])
+    
+    def search(
+        self,
+        query: str,
+        tags: Optional[List[str]] = None,
+    ) -> List[Dict[str, Any]]:
+        """
+        Search recipes in HTTP registry.
+        
+        Args:
+            query: Search query
+            tags: Filter by tags
+            
+        Returns:
+            List of matching recipe info dicts
+        """
+        from urllib.parse import quote as url_quote
+        params = f"?q={url_quote(query)}"
+        if tags:
+            params += f"&tags={','.join(tags)}"
+        result = self._request("GET", f"/v1/search{params}")
+        return result.get("results", [])
+    
+    def get_versions(self, name: str) -> List[str]:
+        """Get all versions of a recipe."""
+        result = self._request("GET", f"/v1/recipes/{name}")
+        return result.get("versions", [])
+    
+    def get_info(self, name: str, version: Optional[str] = None) -> Dict[str, Any]:
+        """Get detailed info about a recipe version."""
+        if version:
+            return self._request("GET", f"/v1/recipes/{name}/{version}")
+        return self._request("GET", f"/v1/recipes/{name}")
+    
+    def delete(self, name: str, version: Optional[str] = None) -> bool:
+        """
+        Delete a recipe or specific version.
+        
+        Args:
+            name: Recipe name
+            version: Version to delete (None = all versions)
+            
+        Returns:
+            True if deleted
+        """
+        if version:
+            self._request("DELETE", f"/v1/recipes/{name}/{version}")
+        else:
+            self._request("DELETE", f"/v1/recipes/{name}")
+        return True
+
+
+# Alias for backwards compatibility
+RemoteRegistry = HttpRegistry
 
 
 def get_registry(

src/praisonai/praisonai/recipe/runtime.py

@@ -0,0 +1,214 @@
+"""
+Recipe Runtime Configuration Models.
+
+Defines the runtime configuration schema for recipes, enabling:
+- Background task execution
+- Async job submission
+- Scheduled execution (24/7 daemon)
+
+All fields are optional and backward compatible with existing recipes.
+"""
+
+import os
+import re
+from dataclasses import dataclass, field
+from typing import Any, Dict, List, Optional
+
+
+# Safe defaults for operational features
+DEFAULT_TIMEOUT_SEC = 300  # 5 minutes
+DEFAULT_MAX_COST_USD = 1.00  # $1.00 budget limit
+DEFAULT_MAX_RETRIES = 3
+DEFAULT_MAX_CONCURRENT = 5
+DEFAULT_CLEANUP_DELAY_SEC = 3600  # 1 hour
+
+
+@dataclass
+class BackgroundRuntimeConfig:
+    """Configuration for background task execution."""
+    enabled: bool = False
+    max_concurrent: int = DEFAULT_MAX_CONCURRENT
+    cleanup_delay_sec: int = DEFAULT_CLEANUP_DELAY_SEC
+    
+    @classmethod
+    def from_dict(cls, data: Optional[Dict[str, Any]]) -> 'BackgroundRuntimeConfig':
+        """Create from dictionary with defaults."""
+        if not data:
+            return cls()
+        return cls(
+            enabled=data.get('enabled', False),
+            max_concurrent=data.get('max_concurrent', DEFAULT_MAX_CONCURRENT),
+            cleanup_delay_sec=data.get('cleanup_delay_sec', DEFAULT_CLEANUP_DELAY_SEC),
+        )
+
+
+@dataclass
+class JobRuntimeConfig:
+    """Configuration for async job execution."""
+    enabled: bool = False
+    timeout_sec: int = DEFAULT_TIMEOUT_SEC
+    webhook_url: Optional[str] = None  # Supports ${ENV_VAR} interpolation
+    idempotency_scope: str = "none"  # none|session|global
+    events: List[str] = field(default_factory=lambda: ["completed", "failed"])
+    
+    @classmethod
+    def from_dict(cls, data: Optional[Dict[str, Any]]) -> 'JobRuntimeConfig':
+        """Create from dictionary with defaults."""
+        if not data:
+            return cls()
+        return cls(
+            enabled=data.get('enabled', False),
+            timeout_sec=data.get('timeout_sec', DEFAULT_TIMEOUT_SEC),
+            webhook_url=data.get('webhook_url'),
+            idempotency_scope=data.get('idempotency_scope', 'none'),
+            events=data.get('events', ['completed', 'failed']),
+        )
+
+
+@dataclass
+class ScheduleRuntimeConfig:
+    """Configuration for scheduled execution."""
+    enabled: bool = False
+    interval: str = "hourly"  # hourly|daily|*/30m|seconds|cron-like
+    max_retries: int = DEFAULT_MAX_RETRIES
+    run_immediately: bool = False
+    timeout_sec: int = DEFAULT_TIMEOUT_SEC
+    max_cost_usd: float = DEFAULT_MAX_COST_USD
+    
+    @classmethod
+    def from_dict(cls, data: Optional[Dict[str, Any]]) -> 'ScheduleRuntimeConfig':
+        """Create from dictionary with defaults."""
+        if not data:
+            return cls()
+        return cls(
+            enabled=data.get('enabled', False),
+            interval=data.get('interval', 'hourly'),
+            max_retries=data.get('max_retries', DEFAULT_MAX_RETRIES),
+            run_immediately=data.get('run_immediately', False),
+            timeout_sec=data.get('timeout_sec', DEFAULT_TIMEOUT_SEC),
+            max_cost_usd=data.get('max_cost_usd', DEFAULT_MAX_COST_USD),
+        )
+
+
+@dataclass
+class RuntimeConfig:
+    """
+    Complete runtime configuration for a recipe.
+    
+    Parsed from the optional `runtime` block in TEMPLATE.yaml:
+    
+    ```yaml
+    runtime:
+      background:
+        enabled: false
+        max_concurrent: 5
+        cleanup_delay_sec: 3600
+      job:
+        enabled: false
+        timeout_sec: 3600
+        webhook_url: "${WEBHOOK_URL}"
+        idempotency_scope: "session"
+        events: ["completed", "failed"]
+      schedule:
+        enabled: false
+        interval: "hourly"
+        max_retries: 3
+        run_immediately: true
+        timeout_sec: 300
+        max_cost_usd: 1.00
+    ```
+    """
+    background: BackgroundRuntimeConfig = field(default_factory=BackgroundRuntimeConfig)
+    job: JobRuntimeConfig = field(default_factory=JobRuntimeConfig)
+    schedule: ScheduleRuntimeConfig = field(default_factory=ScheduleRuntimeConfig)
+    
+    @classmethod
+    def from_dict(cls, data: Optional[Dict[str, Any]]) -> 'RuntimeConfig':
+        """Create from dictionary with defaults."""
+        if not data:
+            return cls()
+        return cls(
+            background=BackgroundRuntimeConfig.from_dict(data.get('background')),
+            job=JobRuntimeConfig.from_dict(data.get('job')),
+            schedule=ScheduleRuntimeConfig.from_dict(data.get('schedule')),
+        )
+    
+    def to_dict(self) -> Dict[str, Any]:
+        """Convert to dictionary for serialization."""
+        return {
+            'background': {
+                'enabled': self.background.enabled,
+                'max_concurrent': self.background.max_concurrent,
+                'cleanup_delay_sec': self.background.cleanup_delay_sec,
+            },
+            'job': {
+                'enabled': self.job.enabled,
+                'timeout_sec': self.job.timeout_sec,
+                'webhook_url': self.job.webhook_url,
+                'idempotency_scope': self.job.idempotency_scope,
+                'events': self.job.events,
+            },
+            'schedule': {
+                'enabled': self.schedule.enabled,
+                'interval': self.schedule.interval,
+                'max_retries': self.schedule.max_retries,
+                'run_immediately': self.schedule.run_immediately,
+                'timeout_sec': self.schedule.timeout_sec,
+                'max_cost_usd': self.schedule.max_cost_usd,
+            },
+        }
+
+
+def expand_env_vars(value: Any) -> Any:
+    """
+    Safely expand environment variables in a value.
+    
+    Only supports ${VAR} syntax for safety (no eval, no shell expansion).
+    
+    Args:
+        value: Value to expand (string, dict, or list)
+        
+    Returns:
+        Value with environment variables expanded
+    """
+    if isinstance(value, str):
+        # Match ${VAR} pattern only
+        pattern = r'\$\{([A-Za-z_][A-Za-z0-9_]*)\}'
+        
+        def replace_env(match):
+            var_name = match.group(1)
+            return os.environ.get(var_name, match.group(0))  # Keep original if not found
+        
+        return re.sub(pattern, replace_env, value)
+    
+    elif isinstance(value, dict):
+        return {k: expand_env_vars(v) for k, v in value.items()}
+    
+    elif isinstance(value, list):
+        return [expand_env_vars(item) for item in value]
+    
+    return value
+
+
+def parse_runtime_config(
+    raw_runtime: Optional[Dict[str, Any]],
+    expand_env: bool = True
+) -> RuntimeConfig:
+    """
+    Parse runtime configuration from raw YAML data.
+    
+    Args:
+        raw_runtime: Raw runtime dict from TEMPLATE.yaml
+        expand_env: Whether to expand environment variables
+        
+    Returns:
+        Parsed RuntimeConfig with defaults applied
+    """
+    if not raw_runtime:
+        return RuntimeConfig()
+    
+    # Expand environment variables if requested
+    if expand_env:
+        raw_runtime = expand_env_vars(raw_runtime)
+    
+    return RuntimeConfig.from_dict(raw_runtime)

src/praisonai/praisonai/recipe/serve.py

@@ -5,17 +5,21 @@ Provides HTTP endpoints for recipe execution.
 Optional dependency - requires: pip install praisonai[serve]
 
 Endpoints:
-- GET  /health           - Health check
-- GET  /v1/recipes       - List recipes
-- GET  /v1/recipes/{name} - Describe recipe
+- GET  /health              - Health check
+- GET  /v1/recipes          - List recipes
+- GET  /v1/recipes/{name}   - Describe recipe
 - GET  /v1/recipes/{name}/schema - Get recipe schema
-- POST /v1/recipes/run   - Run recipe (sync)
-- POST /v1/recipes/stream - Run recipe (SSE)
+- POST /v1/recipes/run      - Run recipe (sync)
+- POST /v1/recipes/stream   - Run recipe (SSE)
+- POST /v1/recipes/validate - Validate recipe
+- GET  /metrics             - Prometheus metrics (optional)
+- GET  /openapi.json        - OpenAPI specification
+- POST /admin/reload        - Hot reload registry (auth required)
 
 Auth modes:
 - none: No authentication (localhost only)
 - api-key: X-API-Key header required
-- jwt: Bearer token required (future)
+- jwt: Bearer token required
 
 Config file (serve.yaml):
 ```yaml
@@ -28,12 +32,19 @@ recipes:
   - another-recipe
 preload: true
 cors_origins: "*"
+rate_limit: 100           # requests per minute (0 = disabled)
+max_request_size: 10485760  # 10MB default
+enable_metrics: false     # Enable /metrics endpoint
+enable_admin: false       # Enable /admin/* endpoints
+trace_exporter: none      # none, otlp, jaeger, zipkin
 ```
 """
 
 import json
 import os
-from typing import Any, Dict, Optional
+import time
+from collections import defaultdict
+from typing import Any, Dict, List, Optional, Tuple
 
 
 def load_config(config_path: Optional[str] = None) -> Dict[str, Any]:
@@ -65,6 +76,238 @@ def load_config(config_path: Optional[str] = None) -> Dict[str, Any]:
     return config
 
 
+# Default constants
+DEFAULT_MAX_REQUEST_SIZE = 10 * 1024 * 1024  # 10MB
+DEFAULT_RATE_LIMIT = 100  # requests per minute
+DEFAULT_RATE_LIMIT_EXEMPT_PATHS = ["/health", "/metrics"]
+
+
+class RateLimiter:
+    """Simple in-memory rate limiter using sliding window."""
+    
+    def __init__(self, requests_per_minute: int = DEFAULT_RATE_LIMIT):
+        self.requests_per_minute = requests_per_minute
+        self.window_seconds = 60
+        self._requests: Dict[str, List[float]] = defaultdict(list)
+    
+    def check(self, client_id: str) -> Tuple[bool, int]:
+        """
+        Check if request is allowed.
+        
+        Returns:
+            Tuple of (allowed, retry_after_seconds)
+        """
+        if self.requests_per_minute <= 0:
+            return True, 0
+        
+        now = time.time()
+        window_start = now - self.window_seconds
+        
+        # Clean old requests
+        self._requests[client_id] = [
+            t for t in self._requests[client_id] if t > window_start
+        ]
+        
+        if len(self._requests[client_id]) >= self.requests_per_minute:
+            # Calculate retry-after
+            oldest = min(self._requests[client_id])
+            retry_after = int(oldest + self.window_seconds - now) + 1
+            return False, max(1, retry_after)
+        
+        self._requests[client_id].append(now)
+        return True, 0
+
+
+def create_rate_limiter(requests_per_minute: int = DEFAULT_RATE_LIMIT) -> RateLimiter:
+    """Create a rate limiter instance."""
+    return RateLimiter(requests_per_minute=requests_per_minute)
+
+
+class MetricsCollector:
+    """Simple in-memory metrics collector for Prometheus format."""
+    
+    def __init__(self):
+        self._requests_total: Dict[str, int] = defaultdict(int)
+        self._request_durations: Dict[str, List[float]] = defaultdict(list)
+        self._errors_total: Dict[str, int] = defaultdict(int)
+    
+    def record_request(self, path: str, method: str, status: int, duration: float):
+        """Record a request."""
+        # Normalize path to avoid label explosion
+        normalized_path = self._normalize_path(path)
+        key = f'{normalized_path}|{method}|{status}'
+        self._requests_total[key] += 1
+        self._request_durations[f'{normalized_path}|{method}'].append(duration)
+        
+        if status >= 400:
+            error_type = "client_error" if status < 500 else "server_error"
+            error_key = f'{normalized_path}|{method}|{error_type}'
+            self._errors_total[error_key] += 1
+    
+    def _normalize_path(self, path: str) -> str:
+        """Normalize path to avoid label explosion."""
+        # Replace dynamic segments
+        parts = path.split("/")
+        normalized = []
+        for i, part in enumerate(parts):
+            if i > 0 and parts[i-1] == "recipes" and part not in ["run", "stream", "validate"]:
+                normalized.append("{name}")
+            else:
+                normalized.append(part)
+        return "/".join(normalized)
+    
+    def get_prometheus_metrics(self) -> str:
+        """Get metrics in Prometheus exposition format."""
+        lines = []
+        
+        # Requests total
+        lines.append("# HELP praisonai_http_requests_total Total HTTP requests")
+        lines.append("# TYPE praisonai_http_requests_total counter")
+        for key, count in self._requests_total.items():
+            path, method, status = key.split("|")
+            lines.append(f'praisonai_http_requests_total{{path="{path}",method="{method}",status="{status}"}} {count}')
+        
+        # Request duration histogram (simplified - just sum and count)
+        lines.append("# HELP praisonai_http_request_duration_seconds HTTP request duration")
+        lines.append("# TYPE praisonai_http_request_duration_seconds histogram")
+        for key, durations in self._request_durations.items():
+            path, method = key.split("|")
+            if durations:
+                total = sum(durations)
+                count = len(durations)
+                lines.append(f'praisonai_http_request_duration_seconds_sum{{path="{path}",method="{method}"}} {total:.6f}')
+                lines.append(f'praisonai_http_request_duration_seconds_count{{path="{path}",method="{method}"}} {count}')
+                # Add buckets
+                buckets = [0.005, 0.01, 0.025, 0.05, 0.1, 0.25, 0.5, 1, 2.5, 5, 10]
+                for bucket in buckets:
+                    bucket_count = sum(1 for d in durations if d <= bucket)
+                    lines.append(f'praisonai_http_request_duration_seconds_bucket{{path="{path}",method="{method}",le="{bucket}"}} {bucket_count}')
+                lines.append(f'praisonai_http_request_duration_seconds_bucket{{path="{path}",method="{method}",le="+Inf"}} {count}')
+        
+        # Errors total
+        lines.append("# HELP praisonai_http_errors_total Total HTTP errors")
+        lines.append("# TYPE praisonai_http_errors_total counter")
+        for key, count in self._errors_total.items():
+            path, method, error_type = key.split("|")
+            lines.append(f'praisonai_http_errors_total{{path="{path}",method="{method}",error_type="{error_type}"}} {count}')
+        
+        return "\n".join(lines)
+
+
+# Global metrics collector (created per app instance)
+_metrics_collector: Optional[MetricsCollector] = None
+
+
+def get_openapi_spec(config: Dict[str, Any]) -> Dict[str, Any]:
+    """Generate OpenAPI specification."""
+    spec = {
+        "openapi": "3.0.3",
+        "info": {
+            "title": "PraisonAI Recipe Runner API",
+            "description": "HTTP API for running PraisonAI recipes",
+            "version": _get_version(),
+        },
+        "servers": [
+            {"url": f"http://{config.get('host', '127.0.0.1')}:{config.get('port', 8765)}"}
+        ],
+        "paths": {
+            "/health": {
+                "get": {
+                    "summary": "Health check",
+                    "responses": {"200": {"description": "Server is healthy"}}
+                }
+            },
+            "/v1/recipes": {
+                "get": {
+                    "summary": "List available recipes",
+                    "parameters": [
+                        {"name": "source", "in": "query", "schema": {"type": "string"}},
+                        {"name": "tags", "in": "query", "schema": {"type": "string"}}
+                    ],
+                    "responses": {"200": {"description": "List of recipes"}}
+                }
+            },
+            "/v1/recipes/{name}": {
+                "get": {
+                    "summary": "Describe a recipe",
+                    "parameters": [{"name": "name", "in": "path", "required": True, "schema": {"type": "string"}}],
+                    "responses": {"200": {"description": "Recipe details"}, "404": {"description": "Recipe not found"}}
+                }
+            },
+            "/v1/recipes/{name}/schema": {
+                "get": {
+                    "summary": "Get recipe JSON schema",
+                    "parameters": [{"name": "name", "in": "path", "required": True, "schema": {"type": "string"}}],
+                    "responses": {"200": {"description": "Recipe schema"}}
+                }
+            },
+            "/v1/recipes/run": {
+                "post": {
+                    "summary": "Run a recipe",
+                    "requestBody": {
+                        "required": True,
+                        "content": {
+                            "application/json": {
+                                "schema": {
+                                    "type": "object",
+                                    "required": ["recipe"],
+                                    "properties": {
+                                        "recipe": {"type": "string"},
+                                        "input": {"type": "object"},
+                                        "config": {"type": "object"},
+                                        "session_id": {"type": "string"},
+                                        "options": {"type": "object"}
+                                    }
+                                }
+                            }
+                        }
+                    },
+                    "responses": {"200": {"description": "Recipe result"}}
+                }
+            },
+            "/v1/recipes/stream": {
+                "post": {
+                    "summary": "Stream recipe execution (SSE)",
+                    "responses": {"200": {"description": "SSE event stream"}}
+                }
+            },
+            "/v1/recipes/validate": {
+                "post": {
+                    "summary": "Validate a recipe",
+                    "responses": {"200": {"description": "Validation result"}}
+                }
+            },
+        }
+    }
+    
+    # Add optional endpoints
+    if config.get("enable_metrics"):
+        spec["paths"]["/metrics"] = {
+            "get": {
+                "summary": "Prometheus metrics",
+                "responses": {"200": {"description": "Metrics in Prometheus format"}}
+            }
+        }
+    
+    if config.get("enable_admin"):
+        spec["paths"]["/admin/reload"] = {
+            "post": {
+                "summary": "Hot reload recipe registry",
+                "security": [{"apiKey": []}],
+                "responses": {"200": {"description": "Reload successful"}, "401": {"description": "Unauthorized"}}
+            }
+        }
+    
+    spec["paths"]["/openapi.json"] = {
+        "get": {
+            "summary": "OpenAPI specification",
+            "responses": {"200": {"description": "OpenAPI JSON"}}
+        }
+    }
+    
+    return spec
+
+
 def create_auth_middleware(auth_type: str, api_key: Optional[str] = None, jwt_secret: Optional[str] = None):
     """Create authentication middleware."""
     try:
@@ -346,6 +589,43 @@ def create_app(config: Optional[Dict[str, Any]] = None) -> Any:
         status_code = 200 if result.valid else 400
         return JSONResponse(result.to_dict(), status_code=status_code)
     
+    async def get_metrics(request: Request) -> Response:
+        """GET /metrics - Prometheus metrics."""
+        global _metrics_collector
+        if _metrics_collector is None:
+            _metrics_collector = MetricsCollector()
+        
+        content = _metrics_collector.get_prometheus_metrics()
+        return Response(
+            content=content,
+            media_type="text/plain; version=0.0.4; charset=utf-8"
+        )
+    
+    async def admin_reload(request: Request) -> JSONResponse:
+        """POST /admin/reload - Hot reload recipe registry."""
+        try:
+            from praisonai import recipe
+            # Clear any cached recipes and reload
+            if hasattr(recipe, '_recipe_cache'):
+                recipe._recipe_cache.clear()
+            if hasattr(recipe, 'reload_registry'):
+                recipe.reload_registry()
+            
+            return JSONResponse({
+                "status": "reloaded",
+                "timestamp": time.strftime("%Y-%m-%dT%H:%M:%SZ", time.gmtime())
+            })
+        except Exception as e:
+            return JSONResponse(
+                {"error": {"code": "reload_failed", "message": str(e)}},
+                status_code=500
+            )
+    
+    async def get_openapi(request: Request) -> JSONResponse:
+        """GET /openapi.json - OpenAPI specification."""
+        spec = get_openapi_spec(config)
+        return JSONResponse(spec)
+    
     # Build routes
     routes = [
         Route("/health", health, methods=["GET"]),
@@ -355,8 +635,33 @@ def create_app(config: Optional[Dict[str, Any]] = None) -> Any:
         Route("/v1/recipes/validate", validate_recipe, methods=["POST"]),
         Route("/v1/recipes/{name}", describe_recipe, methods=["GET"]),
         Route("/v1/recipes/{name}/schema", get_schema, methods=["GET"]),
+        Route("/openapi.json", get_openapi, methods=["GET"]),
     ]
     
+    # Add optional endpoints
+    if config.get("enable_metrics"):
+        routes.append(Route("/metrics", get_metrics, methods=["GET"]))
+    
+    if config.get("enable_admin"):
+        routes.append(Route("/admin/reload", admin_reload, methods=["POST"]))
+    
+    # Initialize metrics collector if enabled
+    global _metrics_collector
+    if config.get("enable_metrics"):
+        _metrics_collector = MetricsCollector()
+    
+    # Create rate limiter if configured
+    rate_limit = config.get("rate_limit", 0)
+    rate_limiter = None
+    if rate_limit > 0:
+        rate_limiter = create_rate_limiter(rate_limit)
+    
+    # Get max request size
+    max_request_size = config.get("max_request_size", DEFAULT_MAX_REQUEST_SIZE)
+    
+    # Exempt paths for rate limiting
+    rate_limit_exempt = config.get("rate_limit_exempt_paths", DEFAULT_RATE_LIMIT_EXEMPT_PATHS)
+    
     # Add CORS middleware if configured
     middleware = []
     cors_origins = config.get("cors_origins")
@@ -389,6 +694,75 @@ def create_app(config: Optional[Dict[str, Any]] = None) -> Any:
         if auth_middleware:
             middleware.append(Middleware(auth_middleware))
     
+    # Create rate limit and size limit middleware
+    from starlette.middleware.base import BaseHTTPMiddleware
+    
+    class RateLimitMiddleware(BaseHTTPMiddleware):
+        """Rate limiting middleware."""
+        
+        async def dispatch(self, request, call_next):
+            if rate_limiter is None:
+                return await call_next(request)
+            
+            # Skip exempt paths
+            if request.url.path in rate_limit_exempt:
+                return await call_next(request)
+            
+            # Get client identifier (IP or API key)
+            client_id = request.headers.get("X-API-Key") or request.client.host if request.client else "unknown"
+            
+            allowed, retry_after = rate_limiter.check(client_id)
+            if not allowed:
+                return JSONResponse(
+                    {"error": {"code": "rate_limited", "message": "Too many requests"}},
+                    status_code=429,
+                    headers={"Retry-After": str(retry_after)}
+                )
+            
+            return await call_next(request)
+    
+    class RequestSizeLimitMiddleware(BaseHTTPMiddleware):
+        """Request size limit middleware."""
+        
+        async def dispatch(self, request, call_next):
+            content_length = request.headers.get("content-length")
+            if content_length and int(content_length) > max_request_size:
+                return JSONResponse(
+                    {"error": {"code": "request_too_large", "message": f"Request body too large. Max: {max_request_size} bytes"}},
+                    status_code=413
+                )
+            return await call_next(request)
+    
+    class MetricsMiddleware(BaseHTTPMiddleware):
+        """Metrics collection middleware."""
+        
+        async def dispatch(self, request, call_next):
+            if _metrics_collector is None:
+                return await call_next(request)
+            
+            start_time = time.time()
+            response = await call_next(request)
+            duration = time.time() - start_time
+            
+            _metrics_collector.record_request(
+                path=request.url.path,
+                method=request.method,
+                status=response.status_code,
+                duration=duration
+            )
+            
+            return response
+    
+    # Add custom middleware (order matters - first added = outermost)
+    if config.get("enable_metrics"):
+        middleware.append(Middleware(MetricsMiddleware))
+    
+    if max_request_size > 0:
+        middleware.append(Middleware(RequestSizeLimitMiddleware))
+    
+    if rate_limiter is not None:
+        middleware.append(Middleware(RateLimitMiddleware))
+    
     return Starlette(routes=routes, middleware=middleware)
 
 
@@ -397,6 +771,7 @@ def serve(
     port: int = 8765,
     reload: bool = False,
     config: Optional[Dict[str, Any]] = None,
+    workers: int = 1,
 ):
     """
     Start the recipe runner server.
@@ -406,6 +781,7 @@ def serve(
         port: Server port (default: 8765)
         reload: Enable hot reload (default: False)
         config: Optional configuration dict
+        workers: Number of worker processes (default: 1)
     """
     try:
         import uvicorn
@@ -414,8 +790,64 @@ def serve(
             "Serve dependencies not installed. Run: pip install praisonai[serve]"
         )
     
+    # Initialize OpenTelemetry tracing if configured
+    trace_exporter = (config or {}).get("trace_exporter", "none")
+    if trace_exporter and trace_exporter != "none":
+        _init_tracing(trace_exporter, config or {})
+    
     app = create_app(config)
-    uvicorn.run(app, host=host, port=port, reload=reload)
+    
+    # Workers > 1 requires reload=False
+    if workers > 1 and reload:
+        import warnings
+        warnings.warn("Cannot use reload with multiple workers. Disabling reload.")
+        reload = False
+    
+    uvicorn.run(app, host=host, port=port, reload=reload, workers=workers if workers > 1 else None)
+
+
+def _init_tracing(exporter: str, config: Dict[str, Any]):
+    """Initialize OpenTelemetry tracing (lazy import)."""
+    try:
+        from opentelemetry import trace
+        from opentelemetry.sdk.trace import TracerProvider
+        from opentelemetry.sdk.trace.export import BatchSpanProcessor
+        from opentelemetry.sdk.resources import Resource
+        
+        resource = Resource.create({
+            "service.name": config.get("service_name", "praisonai-recipe"),
+            "service.version": _get_version(),
+        })
+        
+        provider = TracerProvider(resource=resource)
+        
+        if exporter == "otlp":
+            from opentelemetry.exporter.otlp.proto.grpc.trace_exporter import OTLPSpanExporter
+            endpoint = config.get("otlp_endpoint", "http://localhost:4317")
+            span_exporter = OTLPSpanExporter(endpoint=endpoint)
+        elif exporter == "jaeger":
+            from opentelemetry.exporter.jaeger.thrift import JaegerExporter
+            span_exporter = JaegerExporter(
+                agent_host_name=config.get("jaeger_host", "localhost"),
+                agent_port=config.get("jaeger_port", 6831),
+            )
+        elif exporter == "zipkin":
+            from opentelemetry.exporter.zipkin.json import ZipkinExporter
+            span_exporter = ZipkinExporter(
+                endpoint=config.get("zipkin_endpoint", "http://localhost:9411/api/v2/spans")
+            )
+        else:
+            return  # Unknown exporter
+        
+        provider.add_span_processor(BatchSpanProcessor(span_exporter))
+        trace.set_tracer_provider(provider)
+        
+    except ImportError:
+        import warnings
+        warnings.warn(
+            f"OpenTelemetry exporter '{exporter}' requested but dependencies not installed. "
+            "Run: pip install opentelemetry-sdk opentelemetry-exporter-otlp"
+        )
 
 
 def _get_version() -> str:

src/praisonai/praisonai/recipe/server.py

@@ -0,0 +1,613 @@
+"""
+Recipe Registry HTTP Server
+
+Provides a local HTTP server for recipe registry operations.
+Supports:
+- GET /healthz - Health check
+- GET /v1/recipes - List recipes (pagination)
+- GET /v1/recipes/{name} - Get recipe info (all versions)
+- GET /v1/recipes/{name}/{version} - Get specific version info
+- GET /v1/recipes/{name}/{version}/download - Download bundle
+- POST /v1/recipes/{name}/{version} - Publish bundle (multipart)
+- DELETE /v1/recipes/{name}/{version} - Delete version
+- GET /v1/search?q=... - Search recipes
+
+Usage:
+    from praisonai.recipe.server import create_app, run_server
+    
+    # Run server
+    run_server(host="127.0.0.1", port=7777)
+    
+    # Or get ASGI app for custom deployment
+    app = create_app(registry_path="~/.praison/registry")
+"""
+
+import json
+import hashlib
+import os
+import re
+import tempfile
+from pathlib import Path
+from typing import Any, Callable, Dict, List, Optional, Tuple
+from urllib.parse import parse_qs, unquote
+
+from .registry import (
+    LocalRegistry,
+    RegistryError,
+    RecipeNotFoundError,
+    RecipeExistsError,
+    RegistryAuthError,
+    DEFAULT_REGISTRY_PATH,
+    DEFAULT_REGISTRY_PORT,
+    _calculate_checksum,
+    _get_timestamp,
+)
+
+
+class RegistryServer:
+    """
+    Simple HTTP server for recipe registry.
+    
+    Uses only stdlib for minimal dependencies.
+    For production, consider using with uvicorn/gunicorn.
+    """
+    
+    def __init__(
+        self,
+        registry_path: Optional[Path] = None,
+        token: Optional[str] = None,
+        read_only: bool = False,
+    ):
+        """
+        Initialize registry server.
+        
+        Args:
+            registry_path: Path to registry directory
+            token: Required token for write operations (optional)
+            read_only: If True, disable all write operations
+        """
+        self.registry = LocalRegistry(registry_path)
+        self.token = token or os.environ.get("PRAISONAI_REGISTRY_TOKEN")
+        self.read_only = read_only
+        self._routes: List[Tuple[str, str, Callable]] = []
+        self._setup_routes()
+    
+    def _setup_routes(self):
+        """Setup URL routes."""
+        self._routes = [
+            ("GET", r"^/healthz$", self._handle_health),
+            ("GET", r"^/v1/recipes$", self._handle_list_recipes),
+            ("GET", r"^/v1/recipes/([^/]+)$", self._handle_get_recipe),
+            ("GET", r"^/v1/recipes/([^/]+)/([^/]+)$", self._handle_get_version),
+            ("GET", r"^/v1/recipes/([^/]+)/([^/]+)/download$", self._handle_download),
+            ("POST", r"^/v1/recipes/([^/]+)/([^/]+)$", self._handle_publish),
+            ("DELETE", r"^/v1/recipes/([^/]+)/([^/]+)$", self._handle_delete_version),
+            ("DELETE", r"^/v1/recipes/([^/]+)$", self._handle_delete_recipe),
+            ("GET", r"^/v1/search$", self._handle_search),
+        ]
+    
+    def _check_auth(self, headers: Dict[str, str]) -> bool:
+        """Check if request is authorized for write operations."""
+        if not self.token:
+            return True
+        
+        auth = headers.get("Authorization", "")
+        if auth.startswith("Bearer "):
+            return auth[7:] == self.token
+        return False
+    
+    def _json_response(
+        self,
+        data: Any,
+        status: int = 200,
+        headers: Optional[Dict[str, str]] = None,
+    ) -> Tuple[int, Dict[str, str], bytes]:
+        """Create JSON response."""
+        resp_headers = {
+            "Content-Type": "application/json",
+            "X-Registry-Version": "1.0",
+        }
+        if headers:
+            resp_headers.update(headers)
+        
+        body = json.dumps(data, indent=2).encode("utf-8")
+        return status, resp_headers, body
+    
+    def _error_response(
+        self,
+        message: str,
+        status: int = 400,
+        code: Optional[str] = None,
+    ) -> Tuple[int, Dict[str, str], bytes]:
+        """Create error response."""
+        return self._json_response({
+            "ok": False,
+            "error": message,
+            "code": code or "error",
+        }, status=status)
+    
+    def _file_response(
+        self,
+        file_path: Path,
+        filename: str,
+    ) -> Tuple[int, Dict[str, str], bytes]:
+        """Create file download response."""
+        with open(file_path, "rb") as f:
+            content = f.read()
+        
+        checksum = hashlib.sha256(content).hexdigest()
+        
+        headers = {
+            "Content-Type": "application/gzip",
+            "Content-Disposition": f'attachment; filename="{filename}"',
+            "Content-Length": str(len(content)),
+            "ETag": f'"{checksum[:16]}"',
+            "X-Checksum-SHA256": checksum,
+        }
+        
+        return 200, headers, content
+    
+    def _parse_multipart(
+        self,
+        body: bytes,
+        content_type: str,
+    ) -> Dict[str, Any]:
+        """Parse multipart form data."""
+        # Extract boundary
+        boundary = None
+        for part in content_type.split(";"):
+            part = part.strip()
+            if part.startswith("boundary="):
+                boundary = part[9:].strip('"')
+                break
+        
+        if not boundary:
+            raise ValueError("Missing boundary in multipart data")
+        
+        result = {"fields": {}, "files": {}}
+        boundary_bytes = f"--{boundary}".encode()
+        
+        parts = body.split(boundary_bytes)
+        for part in parts[1:]:  # Skip preamble
+            if part.startswith(b"--"):
+                break  # End marker
+            
+            # Split headers and content
+            if b"\r\n\r\n" in part:
+                header_section, content = part.split(b"\r\n\r\n", 1)
+            else:
+                continue
+            
+            # Parse headers
+            headers = {}
+            for line in header_section.decode("utf-8", errors="ignore").split("\r\n"):
+                if ":" in line:
+                    key, value = line.split(":", 1)
+                    headers[key.strip().lower()] = value.strip()
+            
+            # Get field name and filename
+            disposition = headers.get("content-disposition", "")
+            name = None
+            filename = None
+            
+            for item in disposition.split(";"):
+                item = item.strip()
+                if item.startswith("name="):
+                    name = item[5:].strip('"')
+                elif item.startswith("filename="):
+                    filename = item[9:].strip('"')
+            
+            if not name:
+                continue
+            
+            # Remove trailing \r\n
+            content = content.rstrip(b"\r\n")
+            
+            if filename:
+                result["files"][name] = {
+                    "filename": filename,
+                    "content": content,
+                    "content_type": headers.get("content-type", "application/octet-stream"),
+                }
+            else:
+                result["fields"][name] = content.decode("utf-8", errors="ignore")
+        
+        return result
+    
+    def handle_request(
+        self,
+        method: str,
+        path: str,
+        headers: Dict[str, str],
+        body: bytes,
+        query_string: str = "",
+    ) -> Tuple[int, Dict[str, str], bytes]:
+        """
+        Handle HTTP request.
+        
+        Args:
+            method: HTTP method
+            path: URL path
+            headers: Request headers
+            body: Request body
+            query_string: Query string
+            
+        Returns:
+            Tuple of (status_code, headers, body)
+        """
+        # Parse query string
+        query = parse_qs(query_string)
+        
+        # Find matching route
+        for route_method, pattern, handler in self._routes:
+            if method != route_method:
+                continue
+            
+            match = re.match(pattern, path)
+            if match:
+                try:
+                    return handler(
+                        headers=headers,
+                        body=body,
+                        query=query,
+                        path_params=match.groups(),
+                    )
+                except RecipeNotFoundError as e:
+                    return self._error_response(str(e), status=404, code="not_found")
+                except RecipeExistsError as e:
+                    return self._error_response(str(e), status=409, code="conflict")
+                except RegistryAuthError as e:
+                    return self._error_response(str(e), status=401, code="auth_error")
+                except RegistryError as e:
+                    return self._error_response(str(e), status=400, code="registry_error")
+                except Exception as e:
+                    return self._error_response(f"Internal error: {e}", status=500, code="internal_error")
+        
+        return self._error_response("Not found", status=404, code="not_found")
+    
+    def _handle_health(self, **kwargs) -> Tuple[int, Dict[str, str], bytes]:
+        """Handle GET /healthz."""
+        return self._json_response({
+            "ok": True,
+            "status": "healthy",
+            "timestamp": _get_timestamp(),
+            "read_only": self.read_only,
+            "auth_required": bool(self.token),
+        })
+    
+    def _handle_list_recipes(
+        self,
+        query: Dict[str, List[str]],
+        **kwargs,
+    ) -> Tuple[int, Dict[str, str], bytes]:
+        """Handle GET /v1/recipes."""
+        page = int(query.get("page", ["1"])[0])
+        per_page = min(int(query.get("per_page", ["50"])[0]), 100)
+        tags = query.get("tags", [""])[0].split(",") if query.get("tags") else None
+        
+        if tags and tags[0] == "":
+            tags = None
+        
+        recipes = self.registry.list_recipes(tags=tags)
+        
+        # Paginate
+        start = (page - 1) * per_page
+        end = start + per_page
+        paginated = recipes[start:end]
+        
+        return self._json_response({
+            "ok": True,
+            "recipes": paginated,
+            "total": len(recipes),
+            "page": page,
+            "per_page": per_page,
+            "has_more": end < len(recipes),
+        })
+    
+    def _handle_get_recipe(
+        self,
+        path_params: Tuple[str, ...],
+        **kwargs,
+    ) -> Tuple[int, Dict[str, str], bytes]:
+        """Handle GET /v1/recipes/{name}."""
+        name = unquote(path_params[0])
+        
+        versions = self.registry.get_versions(name)
+        info = self.registry.get_info(name)
+        
+        return self._json_response({
+            "ok": True,
+            "name": name,
+            "versions": versions,
+            "latest": info.get("version"),
+            "description": info.get("description", ""),
+            "tags": info.get("tags", []),
+        })
+    
+    def _handle_get_version(
+        self,
+        path_params: Tuple[str, ...],
+        **kwargs,
+    ) -> Tuple[int, Dict[str, str], bytes]:
+        """Handle GET /v1/recipes/{name}/{version}."""
+        name = unquote(path_params[0])
+        version = unquote(path_params[1])
+        
+        info = self.registry.get_info(name, version)
+        
+        return self._json_response({
+            "ok": True,
+            **info,
+        })
+    
+    def _handle_download(
+        self,
+        path_params: Tuple[str, ...],
+        headers: Dict[str, str],
+        **kwargs,
+    ) -> Tuple[int, Dict[str, str], bytes]:
+        """Handle GET /v1/recipes/{name}/{version}/download."""
+        name = unquote(path_params[0])
+        version = unquote(path_params[1])
+        
+        # Get bundle path
+        bundle_name = f"{name}-{version}.praison"
+        bundle_path = self.registry.recipes_path / name / version / bundle_name
+        
+        if not bundle_path.exists():
+            raise RecipeNotFoundError(f"Bundle not found: {name}@{version}")
+        
+        # Check ETag for caching
+        checksum = _calculate_checksum(bundle_path)
+        etag = f'"{checksum[:16]}"'
+        
+        if_none_match = headers.get("If-None-Match", "")
+        if if_none_match == etag:
+            return 304, {"ETag": etag}, b""
+        
+        return self._file_response(bundle_path, bundle_name)
+    
+    def _handle_publish(
+        self,
+        path_params: Tuple[str, ...],
+        headers: Dict[str, str],
+        body: bytes,
+        **kwargs,
+    ) -> Tuple[int, Dict[str, str], bytes]:
+        """Handle POST /v1/recipes/{name}/{version}."""
+        if self.read_only:
+            return self._error_response("Registry is read-only", status=403, code="read_only")
+        
+        if not self._check_auth(headers):
+            return self._error_response("Authentication required", status=401, code="auth_required")
+        
+        name = unquote(path_params[0])
+        version = unquote(path_params[1])
+        
+        # Parse multipart data
+        content_type = headers.get("Content-Type", "")
+        if not content_type.startswith("multipart/form-data"):
+            return self._error_response("Expected multipart/form-data", status=400)
+        
+        try:
+            data = self._parse_multipart(body, content_type)
+        except ValueError as e:
+            return self._error_response(f"Invalid multipart data: {e}", status=400)
+        
+        if "bundle" not in data["files"]:
+            return self._error_response("Missing bundle file", status=400)
+        
+        force = data["fields"].get("force", "false").lower() == "true"
+        bundle_content = data["files"]["bundle"]["content"]
+        
+        # Save to temp file and publish
+        with tempfile.NamedTemporaryFile(suffix=".praison", delete=False) as tmp:
+            tmp.write(bundle_content)
+            tmp_path = Path(tmp.name)
+        
+        try:
+            result = self.registry.publish(tmp_path, force=force)
+            
+            # Verify name/version match
+            if result["name"] != name or result["version"] != version:
+                # Rollback
+                self.registry.delete(result["name"], result["version"])
+                return self._error_response(
+                    f"Bundle name/version ({result['name']}@{result['version']}) "
+                    f"doesn't match URL ({name}@{version})",
+                    status=400,
+                )
+            
+            return self._json_response({
+                "ok": True,
+                **result,
+            }, status=201)
+        finally:
+            tmp_path.unlink(missing_ok=True)
+    
+    def _handle_delete_version(
+        self,
+        path_params: Tuple[str, ...],
+        headers: Dict[str, str],
+        **kwargs,
+    ) -> Tuple[int, Dict[str, str], bytes]:
+        """Handle DELETE /v1/recipes/{name}/{version}."""
+        if self.read_only:
+            return self._error_response("Registry is read-only", status=403, code="read_only")
+        
+        if not self._check_auth(headers):
+            return self._error_response("Authentication required", status=401, code="auth_required")
+        
+        name = unquote(path_params[0])
+        version = unquote(path_params[1])
+        
+        self.registry.delete(name, version)
+        
+        return self._json_response({
+            "ok": True,
+            "deleted": f"{name}@{version}",
+        })
+    
+    def _handle_delete_recipe(
+        self,
+        path_params: Tuple[str, ...],
+        headers: Dict[str, str],
+        **kwargs,
+    ) -> Tuple[int, Dict[str, str], bytes]:
+        """Handle DELETE /v1/recipes/{name}."""
+        if self.read_only:
+            return self._error_response("Registry is read-only", status=403, code="read_only")
+        
+        if not self._check_auth(headers):
+            return self._error_response("Authentication required", status=401, code="auth_required")
+        
+        name = unquote(path_params[0])
+        
+        self.registry.delete(name)
+        
+        return self._json_response({
+            "ok": True,
+            "deleted": name,
+        })
+    
+    def _handle_search(
+        self,
+        query: Dict[str, List[str]],
+        **kwargs,
+    ) -> Tuple[int, Dict[str, str], bytes]:
+        """Handle GET /v1/search."""
+        q = query.get("q", [""])[0]
+        tags = query.get("tags", [""])[0].split(",") if query.get("tags") else None
+        
+        if tags and tags[0] == "":
+            tags = None
+        
+        if not q:
+            return self._error_response("Query parameter 'q' required", status=400)
+        
+        results = self.registry.search(q, tags=tags)
+        
+        return self._json_response({
+            "ok": True,
+            "query": q,
+            "results": results,
+            "count": len(results),
+        })
+
+
+def create_wsgi_app(
+    registry_path: Optional[Path] = None,
+    token: Optional[str] = None,
+    read_only: bool = False,
+) -> Callable:
+    """
+    Create WSGI application for the registry server.
+    
+    Args:
+        registry_path: Path to registry directory
+        token: Required token for write operations
+        read_only: If True, disable write operations
+        
+    Returns:
+        WSGI application callable
+    """
+    server = RegistryServer(
+        registry_path=registry_path,
+        token=token,
+        read_only=read_only,
+    )
+    
+    def app(environ, start_response):
+        method = environ.get("REQUEST_METHOD", "GET")
+        path = environ.get("PATH_INFO", "/")
+        query_string = environ.get("QUERY_STRING", "")
+        
+        # Read headers
+        headers = {}
+        for key, value in environ.items():
+            if key.startswith("HTTP_"):
+                header_name = key[5:].replace("_", "-").title()
+                headers[header_name] = value
+        headers["Content-Type"] = environ.get("CONTENT_TYPE", "")
+        
+        # Read body
+        try:
+            content_length = int(environ.get("CONTENT_LENGTH", 0))
+        except (ValueError, TypeError):
+            content_length = 0
+        
+        body = environ["wsgi.input"].read(content_length) if content_length > 0 else b""
+        
+        # Handle request
+        status_code, resp_headers, resp_body = server.handle_request(
+            method=method,
+            path=path,
+            headers=headers,
+            body=body,
+            query_string=query_string,
+        )
+        
+        # Send response
+        status = f"{status_code} {'OK' if status_code < 400 else 'Error'}"
+        response_headers = [(k, v) for k, v in resp_headers.items()]
+        start_response(status, response_headers)
+        
+        return [resp_body]
+    
+    return app
+
+
+def run_server(
+    host: str = "127.0.0.1",
+    port: int = DEFAULT_REGISTRY_PORT,
+    registry_path: Optional[Path] = None,
+    token: Optional[str] = None,
+    read_only: bool = False,
+):
+    """
+    Run the registry server using stdlib wsgiref.
+    
+    Args:
+        host: Host to bind to
+        port: Port to bind to
+        registry_path: Path to registry directory
+        token: Required token for write operations
+        read_only: If True, disable write operations
+    """
+    from wsgiref.simple_server import make_server, WSGIRequestHandler
+    
+    # Custom handler to suppress logs unless verbose
+    class QuietHandler(WSGIRequestHandler):
+        def log_message(self, format, *args):
+            pass  # Suppress default logging
+    
+    app = create_wsgi_app(
+        registry_path=registry_path,
+        token=token,
+        read_only=read_only,
+    )
+    
+    server = make_server(host, port, app, handler_class=QuietHandler)
+    
+    print(f"Recipe Registry Server running on http://{host}:{port}")
+    print(f"Registry path: {registry_path or DEFAULT_REGISTRY_PATH}")
+    if token:
+        print("Authentication: enabled (token required for writes)")
+    if read_only:
+        print("Mode: read-only")
+    print("\nEndpoints:")
+    print("  GET  /healthz                         - Health check")
+    print("  GET  /v1/recipes                      - List recipes")
+    print("  GET  /v1/recipes/{name}               - Get recipe info")
+    print("  GET  /v1/recipes/{name}/{version}     - Get version info")
+    print("  GET  /v1/recipes/{name}/{version}/download - Download bundle")
+    print("  POST /v1/recipes/{name}/{version}     - Publish bundle")
+    print("  DELETE /v1/recipes/{name}/{version}   - Delete version")
+    print("  GET  /v1/search?q=...                 - Search recipes")
+    print("\nPress Ctrl+C to stop")
+    
+    try:
+        server.serve_forever()
+    except KeyboardInterrupt:
+        print("\nShutting down...")
+        server.shutdown()

src/praisonai/praisonai/scheduler/agent_scheduler.py

@@ -436,6 +436,103 @@ class AgentScheduler:
         return self.start(interval, max_retries, run_immediately)
 
 
+    @classmethod
+    def from_recipe(
+        cls,
+        recipe_name: str,
+        *,
+        input_data: Any = None,
+        config: Optional[Dict[str, Any]] = None,
+        interval_override: Optional[str] = None,
+        max_retries_override: Optional[int] = None,
+        timeout_override: Optional[int] = None,
+        max_cost_override: Optional[float] = None,
+        on_success: Optional[Callable] = None,
+        on_failure: Optional[Callable] = None
+    ) -> 'AgentScheduler':
+        """
+        Create AgentScheduler from a recipe name.
+        
+        Args:
+            recipe_name: Name of the recipe to schedule
+            input_data: Input data for the recipe
+            config: Configuration overrides for the recipe
+            interval_override: Override schedule interval from recipe runtime config
+            max_retries_override: Override max_retries from recipe runtime config
+            timeout_override: Override timeout from recipe runtime config
+            max_cost_override: Override max_cost from recipe runtime config
+            on_success: Callback function on successful execution
+            on_failure: Callback function on failed execution
+            
+        Returns:
+            Configured AgentScheduler instance
+            
+        Example:
+            scheduler = AgentScheduler.from_recipe("news-monitor")
+            scheduler.start(schedule_expr="hourly")
+        """
+        from praisonai.recipe.bridge import resolve, execute_resolved_recipe, get_recipe_task_description
+        
+        # Resolve the recipe
+        resolved = resolve(
+            recipe_name,
+            input_data=input_data,
+            config=config or {},
+            options={'timeout_sec': timeout_override or 300},
+        )
+        
+        # Get runtime config defaults from recipe
+        interval = interval_override or "hourly"
+        max_retries = max_retries_override if max_retries_override is not None else 3
+        timeout = timeout_override or 300
+        max_cost = max_cost_override if max_cost_override is not None else 1.00
+        
+        runtime = resolved.runtime_config
+        if runtime and hasattr(runtime, 'schedule'):
+            sched_config = runtime.schedule
+            interval = interval_override or sched_config.interval
+            max_retries = max_retries_override if max_retries_override is not None else sched_config.max_retries
+            timeout = timeout_override or sched_config.timeout_sec
+            max_cost = max_cost_override if max_cost_override is not None else sched_config.max_cost_usd
+        
+        # Create a recipe executor agent wrapper
+        class RecipeExecutorAgent:
+            """Wrapper that makes a recipe look like an agent for the scheduler."""
+            def __init__(self, resolved_recipe):
+                self.resolved = resolved_recipe
+                self.name = f"RecipeAgent:{resolved_recipe.name}"
+            
+            def start(self, task: str) -> Any:
+                return execute_resolved_recipe(self.resolved)
+        
+        # Create the agent wrapper
+        agent = RecipeExecutorAgent(resolved)
+        task = get_recipe_task_description(resolved)
+        
+        # Create scheduler instance
+        scheduler = cls(
+            agent=agent,
+            task=task,
+            timeout=timeout,
+            max_cost=max_cost,
+            on_success=on_success,
+            on_failure=on_failure,
+        )
+        
+        # Store recipe metadata and schedule config
+        scheduler._recipe_name = recipe_name
+        scheduler._recipe_resolved = resolved
+        scheduler._yaml_schedule_config = {
+            'interval': interval,
+            'max_retries': max_retries,
+            'run_immediately': False,
+            'timeout': timeout,
+            'max_cost': max_cost,
+        }
+        
+        return scheduler
+
+
 def create_agent_scheduler(
     agent,
     task: str,

src/praisonai/praisonai/scheduler/daemon_manager.py

@@ -69,8 +69,9 @@ class DaemonManager:
     def start_scheduler_daemon(
         self,
         name: str,
-        task: str,
-        interval: str,
+        task: Optional[str] = None,
+        recipe_name: Optional[str] = None,
+        interval: str = "hourly",
         max_cost: Optional[float] = None,
         timeout: Optional[int] = None,
         max_retries: int = 3
@@ -80,7 +81,8 @@ class DaemonManager:
         
         Args:
             name: Scheduler name
-            task: Task to schedule
+            task: Task to schedule (mutually exclusive with recipe_name)
+            recipe_name: Recipe name to schedule (mutually exclusive with task)
             interval: Schedule interval
             max_cost: Maximum cost budget
             timeout: Timeout per execution
@@ -95,18 +97,26 @@ class DaemonManager:
             "-m",
             "praisonai.cli.main",
             "schedule",
-            task,
-            "--interval", interval,
-            "--max-retries", str(max_retries)
         ]
         
+        # Add task or recipe
+        if recipe_name:
+            command.append(recipe_name)  # Recipe name will be auto-detected
+        elif task:
+            command.append(task)
+        else:
+            raise ValueError("Either task or recipe_name must be provided")
+        
+        command.extend(["--interval", interval, "--max-retries", str(max_retries)])
+        
         if timeout:
             command.extend(["--timeout", str(timeout)])
         
         if max_cost:
             command.extend(["--max-cost", str(max_cost)])
         
-        return self.start_daemon(name, task, interval, command)
+        display_task = recipe_name or task
+        return self.start_daemon(name, display_task, interval, command)
     
     def stop_daemon(self, pid: int, timeout: int = 10) -> bool:
         """

src/praisonai/praisonai/templates/loader.py

@@ -47,6 +47,9 @@ class TemplateConfig:
     # CLI integration
     cli: Dict[str, Any] = field(default_factory=dict)
     
+    # Runtime configuration (background/job/schedule)
+    runtime: Optional[Any] = None  # RuntimeConfig, lazy loaded
+    
     # Raw config dict
     raw: Dict[str, Any] = field(default_factory=dict)
     
@@ -162,6 +165,12 @@ class TemplateLoader:
         # Handle agents - can be inline list or file reference string
         agents = raw.get("agents", "agents.yaml")
         
+        # Parse runtime configuration (lazy import to avoid circular deps)
+        runtime = None
+        if "runtime" in raw:
+            from praisonai.recipe.runtime import parse_runtime_config
+            runtime = parse_runtime_config(raw.get("runtime"), expand_env=True)
+        
         return TemplateConfig(
             name=raw.get("name", template_dir.name),
             description=raw.get("description", ""),
@@ -176,6 +185,7 @@ class TemplateLoader:
             defaults=raw.get("defaults", {}),
             skills=raw.get("skills", []),
             cli=raw.get("cli", {}),
+            runtime=runtime,
             raw=raw,
             path=template_dir
         )

src/praisonai/praisonai/version.py

@@ -1 +1 @@
-__version__ = "2.7.3"
+__version__ = "2.7.6"

src/praisonai/tests/integration/test_registry_server.py

@@ -0,0 +1,369 @@
+"""
+Integration tests for recipe registry HTTP server.
+
+Tests the full HTTP server with real requests.
+"""
+
+import json
+import tarfile
+import pytest
+
+from praisonai.recipe.server import RegistryServer, create_wsgi_app
+
+
+class TestRegistryServer:
+    """Test RegistryServer class."""
+    
+    @pytest.fixture
+    def registry_path(self, tmp_path):
+        """Create temporary registry path."""
+        return tmp_path / "registry"
+    
+    @pytest.fixture
+    def server(self, registry_path):
+        """Create a RegistryServer instance."""
+        return RegistryServer(registry_path=registry_path)
+    
+    @pytest.fixture
+    def sample_bundle(self, tmp_path):
+        """Create a sample .praison bundle."""
+        bundle_dir = tmp_path / "bundle"
+        bundle_dir.mkdir()
+        
+        manifest = {
+            "name": "test-recipe",
+            "version": "1.0.0",
+            "description": "A test recipe",
+            "tags": ["test", "sample"],
+            "author": "test",
+            "files": ["recipe.yaml"],
+        }
+        
+        (bundle_dir / "manifest.json").write_text(json.dumps(manifest))
+        (bundle_dir / "recipe.yaml").write_text("name: test")
+        
+        bundle_path = tmp_path / "test-recipe-1.0.0.praison"
+        with tarfile.open(bundle_path, "w:gz") as tar:
+            tar.add(bundle_dir / "manifest.json", arcname="manifest.json")
+            tar.add(bundle_dir / "recipe.yaml", arcname="recipe.yaml")
+        
+        return bundle_path
+    
+    def test_health_endpoint(self, server):
+        """Test GET /healthz."""
+        status, headers, body = server.handle_request(
+            method="GET",
+            path="/healthz",
+            headers={},
+            body=b"",
+        )
+        
+        assert status == 200
+        data = json.loads(body)
+        assert data["ok"] is True
+        assert data["status"] == "healthy"
+    
+    def test_list_recipes_empty(self, server):
+        """Test GET /v1/recipes with empty registry."""
+        status, headers, body = server.handle_request(
+            method="GET",
+            path="/v1/recipes",
+            headers={},
+            body=b"",
+        )
+        
+        assert status == 200
+        data = json.loads(body)
+        assert data["ok"] is True
+        assert data["recipes"] == []
+        assert data["total"] == 0
+    
+    def test_list_recipes_with_data(self, server, sample_bundle):
+        """Test GET /v1/recipes with recipes."""
+        # First publish a recipe
+        server.registry.publish(sample_bundle)
+        
+        status, headers, body = server.handle_request(
+            method="GET",
+            path="/v1/recipes",
+            headers={},
+            body=b"",
+        )
+        
+        assert status == 200
+        data = json.loads(body)
+        assert data["total"] == 1
+        assert data["recipes"][0]["name"] == "test-recipe"
+    
+    def test_get_recipe_info(self, server, sample_bundle):
+        """Test GET /v1/recipes/{name}."""
+        server.registry.publish(sample_bundle)
+        
+        status, headers, body = server.handle_request(
+            method="GET",
+            path="/v1/recipes/test-recipe",
+            headers={},
+            body=b"",
+        )
+        
+        assert status == 200
+        data = json.loads(body)
+        assert data["name"] == "test-recipe"
+        assert "1.0.0" in data["versions"]
+    
+    def test_get_recipe_not_found(self, server):
+        """Test GET /v1/recipes/{name} for non-existent recipe."""
+        status, headers, body = server.handle_request(
+            method="GET",
+            path="/v1/recipes/nonexistent",
+            headers={},
+            body=b"",
+        )
+        
+        assert status == 404
+        data = json.loads(body)
+        assert data["ok"] is False
+    
+    def test_get_version_info(self, server, sample_bundle):
+        """Test GET /v1/recipes/{name}/{version}."""
+        server.registry.publish(sample_bundle)
+        
+        status, headers, body = server.handle_request(
+            method="GET",
+            path="/v1/recipes/test-recipe/1.0.0",
+            headers={},
+            body=b"",
+        )
+        
+        assert status == 200
+        data = json.loads(body)
+        assert data["name"] == "test-recipe"
+        assert data["version"] == "1.0.0"
+    
+    def test_download_bundle(self, server, sample_bundle):
+        """Test GET /v1/recipes/{name}/{version}/download."""
+        server.registry.publish(sample_bundle)
+        
+        status, headers, body = server.handle_request(
+            method="GET",
+            path="/v1/recipes/test-recipe/1.0.0/download",
+            headers={},
+            body=b"",
+        )
+        
+        assert status == 200
+        assert headers["Content-Type"] == "application/gzip"
+        assert "X-Checksum-SHA256" in headers
+        assert len(body) > 0
+    
+    def test_download_with_etag(self, server, sample_bundle):
+        """Test ETag caching for downloads."""
+        server.registry.publish(sample_bundle)
+        
+        # First request
+        status, headers, body = server.handle_request(
+            method="GET",
+            path="/v1/recipes/test-recipe/1.0.0/download",
+            headers={},
+            body=b"",
+        )
+        
+        assert status == 200
+        etag = headers.get("ETag")
+        assert etag is not None
+        
+        # Second request with If-None-Match
+        status, headers, body = server.handle_request(
+            method="GET",
+            path="/v1/recipes/test-recipe/1.0.0/download",
+            headers={"If-None-Match": etag},
+            body=b"",
+        )
+        
+        assert status == 304  # Not Modified
+    
+    def test_search_recipes(self, server, sample_bundle):
+        """Test GET /v1/search."""
+        server.registry.publish(sample_bundle)
+        
+        status, headers, body = server.handle_request(
+            method="GET",
+            path="/v1/search",
+            headers={},
+            body=b"",
+            query_string="q=test",
+        )
+        
+        assert status == 200
+        data = json.loads(body)
+        assert data["ok"] is True
+        assert len(data["results"]) == 1
+    
+    def test_search_no_query(self, server):
+        """Test GET /v1/search without query."""
+        status, headers, body = server.handle_request(
+            method="GET",
+            path="/v1/search",
+            headers={},
+            body=b"",
+        )
+        
+        assert status == 400
+        data = json.loads(body)
+        assert data["ok"] is False
+    
+    def test_publish_requires_auth(self, registry_path, sample_bundle):
+        """Test POST /v1/recipes/{name}/{version} requires auth when token set."""
+        server = RegistryServer(registry_path=registry_path, token="secret")
+        
+        status, headers, body = server.handle_request(
+            method="POST",
+            path="/v1/recipes/test-recipe/1.0.0",
+            headers={"Content-Type": "multipart/form-data; boundary=----test"},
+            body=b"",
+        )
+        
+        assert status == 401
+    
+    def test_publish_with_auth(self, registry_path, sample_bundle):
+        """Test POST /v1/recipes/{name}/{version} with valid auth."""
+        server = RegistryServer(registry_path=registry_path, token="secret")
+        
+        # Build multipart body
+        boundary = "----test"
+        bundle_content = sample_bundle.read_bytes()
+        
+        body_parts = [
+            f"--{boundary}".encode(),
+            b'Content-Disposition: form-data; name="force"',
+            b"",
+            b"false",
+            f"--{boundary}".encode(),
+            f'Content-Disposition: form-data; name="bundle"; filename="test.praison"'.encode(),
+            b"Content-Type: application/gzip",
+            b"",
+            bundle_content,
+            f"--{boundary}--".encode(),
+            b"",
+        ]
+        body = b"\r\n".join(body_parts)
+        
+        status, headers, body_response = server.handle_request(
+            method="POST",
+            path="/v1/recipes/test-recipe/1.0.0",
+            headers={
+                "Content-Type": f"multipart/form-data; boundary={boundary}",
+                "Authorization": "Bearer secret",
+            },
+            body=body,
+        )
+        
+        assert status == 201
+        data = json.loads(body_response)
+        assert data["ok"] is True
+        assert data["name"] == "test-recipe"
+    
+    def test_delete_requires_auth(self, registry_path, sample_bundle):
+        """Test DELETE /v1/recipes/{name}/{version} requires auth."""
+        server = RegistryServer(registry_path=registry_path, token="secret")
+        server.registry.publish(sample_bundle)
+        
+        status, headers, body = server.handle_request(
+            method="DELETE",
+            path="/v1/recipes/test-recipe/1.0.0",
+            headers={},
+            body=b"",
+        )
+        
+        assert status == 401
+    
+    def test_delete_with_auth(self, registry_path, sample_bundle):
+        """Test DELETE /v1/recipes/{name}/{version} with valid auth."""
+        server = RegistryServer(registry_path=registry_path, token="secret")
+        server.registry.publish(sample_bundle)
+        
+        status, headers, body = server.handle_request(
+            method="DELETE",
+            path="/v1/recipes/test-recipe/1.0.0",
+            headers={"Authorization": "Bearer secret"},
+            body=b"",
+        )
+        
+        assert status == 200
+        data = json.loads(body)
+        assert data["ok"] is True
+    
+    def test_read_only_mode(self, registry_path, sample_bundle):
+        """Test read-only mode blocks writes."""
+        server = RegistryServer(registry_path=registry_path, read_only=True)
+        
+        status, headers, body = server.handle_request(
+            method="POST",
+            path="/v1/recipes/test-recipe/1.0.0",
+            headers={"Content-Type": "multipart/form-data; boundary=----test"},
+            body=b"",
+        )
+        
+        assert status == 403
+        data = json.loads(body)
+        assert "read-only" in data["error"].lower()
+    
+    def test_not_found_route(self, server):
+        """Test 404 for unknown routes."""
+        status, headers, body = server.handle_request(
+            method="GET",
+            path="/unknown",
+            headers={},
+            body=b"",
+        )
+        
+        assert status == 404
+
+
+class TestWSGIApp:
+    """Test WSGI application."""
+    
+    @pytest.fixture
+    def app(self, tmp_path):
+        """Create WSGI app."""
+        return create_wsgi_app(registry_path=tmp_path / "registry")
+    
+    def test_wsgi_health(self, app):
+        """Test WSGI app health endpoint."""
+        environ = {
+            "REQUEST_METHOD": "GET",
+            "PATH_INFO": "/healthz",
+            "QUERY_STRING": "",
+            "CONTENT_LENGTH": "0",
+            "wsgi.input": MockInput(b""),
+        }
+        
+        response_started = []
+        def start_response(status, headers):
+            response_started.append((status, headers))
+        
+        result = list(app(environ, start_response))
+        
+        assert len(response_started) == 1
+        assert "200" in response_started[0][0]
+        
+        body = b"".join(result)
+        data = json.loads(body)
+        assert data["ok"] is True
+
+
+class MockInput:
+    """Mock WSGI input stream."""
+    
+    def __init__(self, data):
+        self.data = data
+        self.pos = 0
+    
+    def read(self, size=-1):
+        if size < 0:
+            result = self.data[self.pos:]
+            self.pos = len(self.data)
+        else:
+            result = self.data[self.pos:self.pos + size]
+            self.pos += size
+        return result

src/praisonai/tests/test_serve_features.py

@@ -0,0 +1,519 @@
+"""
+Tests for Recipe Serve Features - Rate Limiting, Size Limits, Metrics, Admin, OpenTelemetry
+
+TDD tests for gap implementation:
+- Rate limiting middleware
+- Request size limits
+- GET /metrics endpoint (Prometheus format)
+- POST /admin/reload endpoint
+- OpenTelemetry export (lazy import)
+- --workers CLI flag
+- OpenAPI export
+"""
+
+import json
+import os
+import sys
+import time
+from unittest.mock import MagicMock, patch
+
+import pytest
+
+
+# ============================================================================
+# Rate Limiting Tests
+# ============================================================================
+
+class TestRateLimiting:
+    """Tests for rate limiting middleware."""
+    
+    def test_rate_limiter_creation(self):
+        """Test rate limiter can be created with config."""
+        from praisonai.recipe.serve import create_rate_limiter
+        
+        limiter = create_rate_limiter(requests_per_minute=100)
+        assert limiter is not None
+    
+    def test_rate_limiter_allows_requests_under_limit(self):
+        """Test rate limiter allows requests under limit."""
+        from praisonai.recipe.serve import create_rate_limiter
+        
+        limiter = create_rate_limiter(requests_per_minute=10)
+        client_ip = "127.0.0.1"
+        
+        # Should allow 10 requests
+        for _ in range(10):
+            allowed, _ = limiter.check(client_ip)
+            assert allowed is True
+    
+    def test_rate_limiter_blocks_over_limit(self):
+        """Test rate limiter blocks requests over limit."""
+        from praisonai.recipe.serve import create_rate_limiter
+        
+        limiter = create_rate_limiter(requests_per_minute=5)
+        client_ip = "127.0.0.1"
+        
+        # Use up the limit
+        for _ in range(5):
+            limiter.check(client_ip)
+        
+        # Next request should be blocked
+        allowed, retry_after = limiter.check(client_ip)
+        assert allowed is False
+        assert retry_after > 0
+    
+    def test_rate_limiter_per_client(self):
+        """Test rate limiter tracks per-client."""
+        from praisonai.recipe.serve import create_rate_limiter
+        
+        limiter = create_rate_limiter(requests_per_minute=2)
+        
+        # Client 1 uses up limit
+        for _ in range(2):
+            limiter.check("client1")
+        
+        # Client 2 should still be allowed
+        allowed, _ = limiter.check("client2")
+        assert allowed is True
+    
+    def test_rate_limit_middleware_returns_429(self):
+        """Test rate limit middleware returns 429 with proper error."""
+        pytest.importorskip("starlette")
+        from starlette.testclient import TestClient
+        from praisonai.recipe.serve import create_app
+        
+        config = {
+            "rate_limit": 2,  # 2 requests per minute
+            "rate_limit_exempt_paths": ["/health"],
+        }
+        app = create_app(config)
+        client = TestClient(app)
+        
+        # First 2 requests should succeed
+        for _ in range(2):
+            response = client.get("/v1/recipes")
+            assert response.status_code in [200, 404]  # OK or no recipes
+        
+        # Third request should be rate limited
+        response = client.get("/v1/recipes")
+        assert response.status_code == 429
+        
+        data = response.json()
+        assert "error" in data
+        assert data["error"]["code"] == "rate_limited"
+        assert "Retry-After" in response.headers
+    
+    def test_rate_limit_exempts_health(self):
+        """Test /health is exempt from rate limiting by default."""
+        pytest.importorskip("starlette")
+        from starlette.testclient import TestClient
+        from praisonai.recipe.serve import create_app
+        
+        config = {"rate_limit": 1}
+        app = create_app(config)
+        client = TestClient(app)
+        
+        # Use up rate limit
+        client.get("/v1/recipes")
+        
+        # Health should still work
+        response = client.get("/health")
+        assert response.status_code == 200
+
+
+# ============================================================================
+# Request Size Limit Tests
+# ============================================================================
+
+class TestRequestSizeLimits:
+    """Tests for request size limits."""
+    
+    def test_size_limit_allows_small_requests(self):
+        """Test small requests are allowed."""
+        pytest.importorskip("starlette")
+        from starlette.testclient import TestClient
+        from praisonai.recipe.serve import create_app
+        
+        config = {"max_request_size": 1024 * 1024}  # 1MB
+        app = create_app(config)
+        client = TestClient(app)
+        
+        # Small request should work
+        response = client.post(
+            "/v1/recipes/run",
+            json={"recipe": "test", "input": "small"}
+        )
+        # May return 404 if recipe doesn't exist, but not 413
+        assert response.status_code != 413
+    
+    def test_size_limit_blocks_large_requests(self):
+        """Test large requests are blocked with 413."""
+        pytest.importorskip("starlette")
+        from starlette.testclient import TestClient
+        from praisonai.recipe.serve import create_app
+        
+        config = {"max_request_size": 100}  # 100 bytes
+        app = create_app(config)
+        client = TestClient(app)
+        
+        # Large request should be blocked
+        large_data = {"recipe": "test", "input": "x" * 200}
+        response = client.post(
+            "/v1/recipes/run",
+            json=large_data
+        )
+        assert response.status_code == 413
+        
+        data = response.json()
+        assert "error" in data
+        assert data["error"]["code"] == "request_too_large"
+    
+    def test_default_size_limit_is_10mb(self):
+        """Test default size limit is 10MB."""
+        from praisonai.recipe.serve import DEFAULT_MAX_REQUEST_SIZE
+        assert DEFAULT_MAX_REQUEST_SIZE == 10 * 1024 * 1024
+
+
+# ============================================================================
+# Metrics Endpoint Tests
+# ============================================================================
+
+class TestMetricsEndpoint:
+    """Tests for /metrics endpoint."""
+    
+    def test_metrics_endpoint_exists_when_enabled(self):
+        """Test /metrics endpoint exists when enabled."""
+        pytest.importorskip("starlette")
+        from starlette.testclient import TestClient
+        from praisonai.recipe.serve import create_app
+        
+        config = {"enable_metrics": True}
+        app = create_app(config)
+        client = TestClient(app)
+        
+        response = client.get("/metrics")
+        assert response.status_code == 200
+    
+    def test_metrics_endpoint_disabled_by_default_on_public(self):
+        """Test /metrics is disabled by default on non-localhost."""
+        pytest.importorskip("starlette")
+        from starlette.testclient import TestClient
+        from praisonai.recipe.serve import create_app
+        
+        # Simulate non-localhost config
+        config = {"host": "0.0.0.0", "enable_metrics": False}
+        app = create_app(config)
+        client = TestClient(app)
+        
+        response = client.get("/metrics")
+        assert response.status_code == 404
+    
+    def test_metrics_prometheus_format(self):
+        """Test metrics are in Prometheus exposition format."""
+        pytest.importorskip("starlette")
+        from starlette.testclient import TestClient
+        from praisonai.recipe.serve import create_app
+        
+        config = {"enable_metrics": True}
+        app = create_app(config)
+        client = TestClient(app)
+        
+        # Make some requests to generate metrics
+        client.get("/health")
+        client.get("/v1/recipes")
+        
+        response = client.get("/metrics")
+        assert response.status_code == 200
+        
+        content = response.text
+        # Check for Prometheus format markers
+        assert "praisonai_http_requests_total" in content
+        assert "praisonai_http_request_duration_seconds" in content
+    
+    def test_metrics_include_required_labels(self):
+        """Test metrics include path, method, status labels."""
+        pytest.importorskip("starlette")
+        from starlette.testclient import TestClient
+        from praisonai.recipe.serve import create_app
+        
+        config = {"enable_metrics": True}
+        app = create_app(config)
+        client = TestClient(app)
+        
+        client.get("/health")
+        
+        response = client.get("/metrics")
+        content = response.text
+        
+        # Should have labels
+        assert 'path="/health"' in content or 'path="health"' in content
+        assert 'method="GET"' in content
+        assert 'status="200"' in content
+
+
+# ============================================================================
+# Admin Reload Endpoint Tests
+# ============================================================================
+
+class TestAdminReload:
+    """Tests for /admin/reload endpoint."""
+    
+    def test_admin_reload_requires_auth(self):
+        """Test /admin/reload requires authentication."""
+        pytest.importorskip("starlette")
+        from starlette.testclient import TestClient
+        from praisonai.recipe.serve import create_app
+        
+        config = {"enable_admin": True, "auth": "api-key", "api_key": "secret"}
+        app = create_app(config)
+        client = TestClient(app)
+        
+        # Without auth should fail
+        response = client.post("/admin/reload")
+        assert response.status_code == 401
+    
+    def test_admin_reload_with_auth(self):
+        """Test /admin/reload works with authentication."""
+        pytest.importorskip("starlette")
+        from starlette.testclient import TestClient
+        from praisonai.recipe.serve import create_app
+        
+        config = {"enable_admin": True, "auth": "api-key", "api_key": "secret"}
+        app = create_app(config)
+        client = TestClient(app)
+        
+        response = client.post(
+            "/admin/reload",
+            headers={"X-API-Key": "secret"}
+        )
+        assert response.status_code == 200
+        
+        data = response.json()
+        assert data["status"] == "reloaded"
+    
+    def test_admin_reload_disabled_by_default(self):
+        """Test /admin/reload is disabled by default."""
+        pytest.importorskip("starlette")
+        from starlette.testclient import TestClient
+        from praisonai.recipe.serve import create_app
+        
+        config = {}  # No enable_admin
+        app = create_app(config)
+        client = TestClient(app)
+        
+        response = client.post("/admin/reload")
+        assert response.status_code == 404
+
+
+# ============================================================================
+# OpenAPI Export Tests
+# ============================================================================
+
+class TestOpenAPIExport:
+    """Tests for OpenAPI spec export."""
+    
+    def test_openapi_endpoint_exists(self):
+        """Test /openapi.json endpoint exists."""
+        pytest.importorskip("starlette")
+        from starlette.testclient import TestClient
+        from praisonai.recipe.serve import create_app
+        
+        config = {}
+        app = create_app(config)
+        client = TestClient(app)
+        
+        response = client.get("/openapi.json")
+        assert response.status_code == 200
+        
+        data = response.json()
+        assert "openapi" in data
+        assert "paths" in data
+    
+    def test_openapi_includes_all_endpoints(self):
+        """Test OpenAPI spec includes all endpoints."""
+        pytest.importorskip("starlette")
+        from starlette.testclient import TestClient
+        from praisonai.recipe.serve import create_app
+        
+        config = {"enable_metrics": True, "enable_admin": True}
+        app = create_app(config)
+        client = TestClient(app)
+        
+        response = client.get("/openapi.json")
+        data = response.json()
+        
+        paths = data["paths"]
+        assert "/health" in paths
+        assert "/v1/recipes" in paths
+        assert "/v1/recipes/run" in paths
+        assert "/metrics" in paths
+        assert "/admin/reload" in paths
+
+
+# ============================================================================
+# Workers CLI Flag Tests
+# ============================================================================
+
+class TestWorkersCLI:
+    """Tests for --workers CLI flag."""
+    
+    def test_serve_command_accepts_workers_flag(self):
+        """Test serve command accepts --workers flag."""
+        from praisonai.cli.features.recipe import RecipeHandler
+        
+        handler = RecipeHandler()
+        
+        # Parse args with workers flag
+        spec = {
+            "workers": {"default": "1"},
+            "port": {"default": "8765"},
+            "host": {"default": "127.0.0.1"},
+        }
+        args = ["--workers", "4", "--port", "8000"]
+        parsed = handler._parse_args(args, spec)
+        
+        assert parsed["workers"] == "4"
+    
+    def test_workers_passed_to_uvicorn(self):
+        """Test workers count is passed to uvicorn."""
+        # Test that serve function accepts workers parameter
+        from praisonai.recipe.serve import serve
+        import inspect
+        
+        sig = inspect.signature(serve)
+        params = list(sig.parameters.keys())
+        
+        assert "workers" in params, "serve() should accept workers parameter"
+        
+        # Check default value
+        workers_param = sig.parameters["workers"]
+        assert workers_param.default == 1, "workers should default to 1"
+
+
+# ============================================================================
+# OpenTelemetry Lazy Import Tests
+# ============================================================================
+
+class TestOpenTelemetryLazyImport:
+    """Tests for OpenTelemetry lazy import behavior."""
+    
+    def test_no_crash_without_otel_installed(self):
+        """Test server works without OpenTelemetry installed."""
+        pytest.importorskip("starlette")
+        from starlette.testclient import TestClient
+        from praisonai.recipe.serve import create_app
+        
+        # Should not crash even without otel
+        config = {"trace_exporter": "none"}
+        app = create_app(config)
+        client = TestClient(app)
+        
+        response = client.get("/health")
+        assert response.status_code == 200
+    
+    def test_otel_config_options(self):
+        """Test OpenTelemetry config options are recognized."""
+        from praisonai.recipe.serve import load_config
+        
+        # These should be valid config keys
+        config = {
+            "trace_exporter": "otlp",
+            "otlp_endpoint": "http://localhost:4317",
+            "service_name": "praisonai-recipe",
+        }
+        
+        # Should not raise
+        assert config["trace_exporter"] == "otlp"
+
+
+# ============================================================================
+# Agent-Recipes Integration Tests
+# ============================================================================
+
+class TestAgentRecipesIntegration:
+    """Tests for Agent-Recipes template integration."""
+    
+    def test_template_discovery_precedence(self):
+        """Test template discovery follows precedence order."""
+        from praisonai.recipe.core import get_template_search_paths
+        
+        paths = get_template_search_paths()
+        
+        # Should include standard paths
+        assert any("praison" in str(p).lower() for p in paths)
+    
+    def test_agent_recipes_path_included(self):
+        """Test Agent-Recipes path is in search paths."""
+        from praisonai.recipe.core import get_template_search_paths
+        
+        paths = get_template_search_paths()
+        path_strs = [str(p) for p in paths]
+        
+        # Should include Agent-Recipes or similar
+        # The exact path depends on installation
+        assert len(paths) > 0
+
+
+# ============================================================================
+# Structured Error Tests
+# ============================================================================
+
+class TestStructuredErrors:
+    """Tests for consistent structured error responses."""
+    
+    def test_401_error_format(self):
+        """Test 401 errors have correct format."""
+        pytest.importorskip("starlette")
+        from starlette.testclient import TestClient
+        from praisonai.recipe.serve import create_app
+        
+        config = {"auth": "api-key", "api_key": "secret"}
+        app = create_app(config)
+        client = TestClient(app)
+        
+        response = client.get("/v1/recipes")
+        assert response.status_code == 401
+        
+        data = response.json()
+        assert "error" in data
+        assert "code" in data["error"]
+        assert "message" in data["error"]
+    
+    def test_429_error_format(self):
+        """Test 429 errors have correct format."""
+        pytest.importorskip("starlette")
+        from starlette.testclient import TestClient
+        from praisonai.recipe.serve import create_app
+        
+        config = {"rate_limit": 1}
+        app = create_app(config)
+        client = TestClient(app)
+        
+        # Use up limit
+        client.get("/v1/recipes")
+        
+        response = client.get("/v1/recipes")
+        if response.status_code == 429:
+            data = response.json()
+            assert "error" in data
+            assert data["error"]["code"] == "rate_limited"
+    
+    def test_413_error_format(self):
+        """Test 413 errors have correct format."""
+        pytest.importorskip("starlette")
+        from starlette.testclient import TestClient
+        from praisonai.recipe.serve import create_app
+        
+        config = {"max_request_size": 10}  # Very small
+        app = create_app(config)
+        client = TestClient(app)
+        
+        response = client.post(
+            "/v1/recipes/run",
+            json={"recipe": "test", "input": "x" * 100}
+        )
+        
+        if response.status_code == 413:
+            data = response.json()
+            assert "error" in data
+            assert data["error"]["code"] == "request_too_large"

src/praisonai/tests/unit/recipe/test_runtime.py

@@ -0,0 +1,284 @@
+"""
+Unit tests for Recipe Runtime Configuration.
+
+Tests:
+- RuntimeConfig parsing from dict
+- Environment variable expansion
+- Default values
+- Schema validation
+"""
+
+import os
+from unittest.mock import patch
+
+
+class TestRuntimeConfig:
+    """Tests for RuntimeConfig dataclass."""
+    
+    def test_empty_runtime_config(self):
+        """Test creating RuntimeConfig with no data."""
+        from praisonai.recipe.runtime import RuntimeConfig
+        
+        config = RuntimeConfig()
+        
+        assert config.background.enabled is False
+        assert config.job.enabled is False
+        assert config.schedule.enabled is False
+    
+    def test_runtime_config_from_dict(self):
+        """Test creating RuntimeConfig from dictionary."""
+        from praisonai.recipe.runtime import RuntimeConfig
+        
+        data = {
+            'background': {
+                'enabled': True,
+                'max_concurrent': 10,
+            },
+            'job': {
+                'enabled': True,
+                'timeout_sec': 600,
+                'webhook_url': 'https://example.com/webhook',
+            },
+            'schedule': {
+                'enabled': True,
+                'interval': 'daily',
+                'max_retries': 5,
+            },
+        }
+        
+        config = RuntimeConfig.from_dict(data)
+        
+        assert config.background.enabled is True
+        assert config.background.max_concurrent == 10
+        assert config.job.enabled is True
+        assert config.job.timeout_sec == 600
+        assert config.job.webhook_url == 'https://example.com/webhook'
+        assert config.schedule.enabled is True
+        assert config.schedule.interval == 'daily'
+        assert config.schedule.max_retries == 5
+    
+    def test_runtime_config_defaults(self):
+        """Test that defaults are applied correctly."""
+        from praisonai.recipe.runtime import (
+            RuntimeConfig,
+            DEFAULT_TIMEOUT_SEC,
+            DEFAULT_MAX_COST_USD,
+            DEFAULT_MAX_RETRIES,
+            DEFAULT_MAX_CONCURRENT,
+        )
+        
+        config = RuntimeConfig.from_dict({})
+        
+        assert config.background.max_concurrent == DEFAULT_MAX_CONCURRENT
+        assert config.job.timeout_sec == DEFAULT_TIMEOUT_SEC
+        assert config.schedule.max_retries == DEFAULT_MAX_RETRIES
+        assert config.schedule.max_cost_usd == DEFAULT_MAX_COST_USD
+    
+    def test_runtime_config_to_dict(self):
+        """Test converting RuntimeConfig to dictionary."""
+        from praisonai.recipe.runtime import RuntimeConfig
+        
+        config = RuntimeConfig()
+        data = config.to_dict()
+        
+        assert 'background' in data
+        assert 'job' in data
+        assert 'schedule' in data
+        assert data['background']['enabled'] is False
+        assert data['job']['enabled'] is False
+        assert data['schedule']['enabled'] is False
+
+
+class TestEnvVarExpansion:
+    """Tests for environment variable expansion."""
+    
+    def test_expand_simple_env_var(self):
+        """Test expanding a simple environment variable."""
+        from praisonai.recipe.runtime import expand_env_vars
+        
+        with patch.dict(os.environ, {'MY_VAR': 'test_value'}):
+            result = expand_env_vars('${MY_VAR}')
+            assert result == 'test_value'
+    
+    def test_expand_env_var_in_string(self):
+        """Test expanding env var embedded in string."""
+        from praisonai.recipe.runtime import expand_env_vars
+        
+        with patch.dict(os.environ, {'API_KEY': 'secret123'}):
+            result = expand_env_vars('Bearer ${API_KEY}')
+            assert result == 'Bearer secret123'
+    
+    def test_expand_missing_env_var(self):
+        """Test that missing env vars are kept as-is."""
+        from praisonai.recipe.runtime import expand_env_vars
+        
+        result = expand_env_vars('${NONEXISTENT_VAR}')
+        assert result == '${NONEXISTENT_VAR}'
+    
+    def test_expand_env_var_in_dict(self):
+        """Test expanding env vars in nested dict."""
+        from praisonai.recipe.runtime import expand_env_vars
+        
+        with patch.dict(os.environ, {'WEBHOOK': 'https://example.com'}):
+            data = {
+                'url': '${WEBHOOK}/callback',
+                'nested': {
+                    'value': '${WEBHOOK}/nested'
+                }
+            }
+            result = expand_env_vars(data)
+            
+            assert result['url'] == 'https://example.com/callback'
+            assert result['nested']['value'] == 'https://example.com/nested'
+    
+    def test_expand_env_var_in_list(self):
+        """Test expanding env vars in list."""
+        from praisonai.recipe.runtime import expand_env_vars
+        
+        with patch.dict(os.environ, {'VAL': 'expanded'}):
+            data = ['${VAL}', 'static', '${VAL}_suffix']
+            result = expand_env_vars(data)
+            
+            assert result == ['expanded', 'static', 'expanded_suffix']
+    
+    def test_no_expansion_for_non_string(self):
+        """Test that non-string values are returned as-is."""
+        from praisonai.recipe.runtime import expand_env_vars
+        
+        assert expand_env_vars(123) == 123
+        assert expand_env_vars(True) is True
+        assert expand_env_vars(None) is None
+
+
+class TestParseRuntimeConfig:
+    """Tests for parse_runtime_config function."""
+    
+    def test_parse_none(self):
+        """Test parsing None returns default config."""
+        from praisonai.recipe.runtime import parse_runtime_config, RuntimeConfig
+        
+        config = parse_runtime_config(None)
+        
+        assert isinstance(config, RuntimeConfig)
+        assert config.background.enabled is False
+    
+    def test_parse_with_env_expansion(self):
+        """Test parsing with environment variable expansion."""
+        from praisonai.recipe.runtime import parse_runtime_config
+        
+        with patch.dict(os.environ, {'WEBHOOK_URL': 'https://hooks.example.com'}):
+            data = {
+                'job': {
+                    'enabled': True,
+                    'webhook_url': '${WEBHOOK_URL}/notify',
+                }
+            }
+            config = parse_runtime_config(data, expand_env=True)
+            
+            assert config.job.webhook_url == 'https://hooks.example.com/notify'
+    
+    def test_parse_without_env_expansion(self):
+        """Test parsing without environment variable expansion."""
+        from praisonai.recipe.runtime import parse_runtime_config
+        
+        data = {
+            'job': {
+                'webhook_url': '${WEBHOOK_URL}',
+            }
+        }
+        config = parse_runtime_config(data, expand_env=False)
+        
+        assert config.job.webhook_url == '${WEBHOOK_URL}'
+
+
+class TestBackgroundRuntimeConfig:
+    """Tests for BackgroundRuntimeConfig."""
+    
+    def test_from_dict_with_all_fields(self):
+        """Test creating from dict with all fields."""
+        from praisonai.recipe.runtime import BackgroundRuntimeConfig
+        
+        data = {
+            'enabled': True,
+            'max_concurrent': 20,
+            'cleanup_delay_sec': 7200,
+        }
+        config = BackgroundRuntimeConfig.from_dict(data)
+        
+        assert config.enabled is True
+        assert config.max_concurrent == 20
+        assert config.cleanup_delay_sec == 7200
+    
+    def test_from_dict_partial(self):
+        """Test creating from dict with partial fields."""
+        from praisonai.recipe.runtime import BackgroundRuntimeConfig, DEFAULT_MAX_CONCURRENT
+        
+        data = {'enabled': True}
+        config = BackgroundRuntimeConfig.from_dict(data)
+        
+        assert config.enabled is True
+        assert config.max_concurrent == DEFAULT_MAX_CONCURRENT
+
+
+class TestJobRuntimeConfig:
+    """Tests for JobRuntimeConfig."""
+    
+    def test_from_dict_with_all_fields(self):
+        """Test creating from dict with all fields."""
+        from praisonai.recipe.runtime import JobRuntimeConfig
+        
+        data = {
+            'enabled': True,
+            'timeout_sec': 1800,
+            'webhook_url': 'https://example.com',
+            'idempotency_scope': 'global',
+            'events': ['completed'],
+        }
+        config = JobRuntimeConfig.from_dict(data)
+        
+        assert config.enabled is True
+        assert config.timeout_sec == 1800
+        assert config.webhook_url == 'https://example.com'
+        assert config.idempotency_scope == 'global'
+        assert config.events == ['completed']
+    
+    def test_default_events(self):
+        """Test default events list."""
+        from praisonai.recipe.runtime import JobRuntimeConfig
+        
+        config = JobRuntimeConfig.from_dict({})
+        
+        assert config.events == ['completed', 'failed']
+
+
+class TestScheduleRuntimeConfig:
+    """Tests for ScheduleRuntimeConfig."""
+    
+    def test_from_dict_with_all_fields(self):
+        """Test creating from dict with all fields."""
+        from praisonai.recipe.runtime import ScheduleRuntimeConfig
+        
+        data = {
+            'enabled': True,
+            'interval': '*/30m',
+            'max_retries': 5,
+            'run_immediately': True,
+            'timeout_sec': 600,
+            'max_cost_usd': 2.50,
+        }
+        config = ScheduleRuntimeConfig.from_dict(data)
+        
+        assert config.enabled is True
+        assert config.interval == '*/30m'
+        assert config.max_retries == 5
+        assert config.run_immediately is True
+        assert config.timeout_sec == 600
+        assert config.max_cost_usd == 2.50
+    
+    def test_default_interval(self):
+        """Test default interval is hourly."""
+        from praisonai.recipe.runtime import ScheduleRuntimeConfig
+        
+        config = ScheduleRuntimeConfig.from_dict({})
+        
+        assert config.interval == 'hourly'

src/praisonai/tests/unit/test_endpoints_unified.py

@@ -0,0 +1,470 @@
+"""
+Unit tests for unified endpoints module.
+
+Tests discovery schema, provider adapters, registry, and CLI.
+"""
+
+import pytest
+from unittest.mock import patch, MagicMock
+
+
+class TestDiscoverySchema:
+    """Tests for discovery schema."""
+    
+    def test_discovery_document_creation(self):
+        """Test creating a discovery document."""
+        from praisonai.endpoints.discovery import (
+            DiscoveryDocument,
+            create_discovery_document,
+            SCHEMA_VERSION,
+        )
+        
+        doc = create_discovery_document(server_name="test-server")
+        
+        assert doc.server_name == "test-server"
+        assert doc.schema_version == SCHEMA_VERSION
+        assert isinstance(doc.providers, list)
+        assert isinstance(doc.endpoints, list)
+    
+    def test_endpoint_info_creation(self):
+        """Test creating endpoint info."""
+        from praisonai.endpoints.discovery import EndpointInfo
+        
+        endpoint = EndpointInfo(
+            name="test-endpoint",
+            description="Test endpoint",
+            provider_type="recipe",
+            tags=["test", "demo"],
+        )
+        
+        assert endpoint.name == "test-endpoint"
+        assert endpoint.provider_type == "recipe"
+        assert "test" in endpoint.tags
+    
+    def test_provider_info_creation(self):
+        """Test creating provider info."""
+        from praisonai.endpoints.discovery import ProviderInfo
+        
+        provider = ProviderInfo(
+            type="agents-api",
+            name="Agents API",
+            capabilities=["invoke", "health"],
+        )
+        
+        assert provider.type == "agents-api"
+        assert "invoke" in provider.capabilities
+    
+    def test_discovery_document_to_dict(self):
+        """Test converting discovery document to dict."""
+        from praisonai.endpoints.discovery import (
+            DiscoveryDocument,
+            EndpointInfo,
+            ProviderInfo,
+        )
+        
+        doc = DiscoveryDocument(server_name="test")
+        doc.add_provider(ProviderInfo(type="recipe", name="Recipe"))
+        doc.add_endpoint(EndpointInfo(name="test-ep", provider_type="recipe"))
+        
+        data = doc.to_dict()
+        
+        assert data["server_name"] == "test"
+        assert len(data["providers"]) == 1
+        assert len(data["endpoints"]) == 1
+        assert data["providers"][0]["type"] == "recipe"
+    
+    def test_get_endpoints_by_type(self):
+        """Test filtering endpoints by type."""
+        from praisonai.endpoints.discovery import DiscoveryDocument, EndpointInfo
+        
+        doc = DiscoveryDocument()
+        doc.add_endpoint(EndpointInfo(name="ep1", provider_type="recipe"))
+        doc.add_endpoint(EndpointInfo(name="ep2", provider_type="agents-api"))
+        doc.add_endpoint(EndpointInfo(name="ep3", provider_type="recipe"))
+        
+        recipe_eps = doc.get_endpoints_by_type("recipe")
+        
+        assert len(recipe_eps) == 2
+        assert all(ep.provider_type == "recipe" for ep in recipe_eps)
+    
+    def test_get_endpoint_by_name(self):
+        """Test getting endpoint by name."""
+        from praisonai.endpoints.discovery import DiscoveryDocument, EndpointInfo
+        
+        doc = DiscoveryDocument()
+        doc.add_endpoint(EndpointInfo(name="my-endpoint", description="Test"))
+        
+        ep = doc.get_endpoint_by_name("my-endpoint")
+        
+        assert ep is not None
+        assert ep.name == "my-endpoint"
+        
+        missing = doc.get_endpoint_by_name("nonexistent")
+        assert missing is None
+
+
+class TestProviderRegistry:
+    """Tests for provider registry."""
+    
+    def test_list_provider_types(self):
+        """Test listing provider types."""
+        from praisonai.endpoints.registry import list_provider_types
+        
+        types = list_provider_types()
+        
+        assert "recipe" in types
+        assert "agents-api" in types
+        assert "mcp" in types
+        assert "a2a" in types
+        assert "a2u" in types
+    
+    def test_get_provider(self):
+        """Test getting a provider instance."""
+        from praisonai.endpoints.registry import get_provider
+        
+        provider = get_provider("recipe", base_url="http://localhost:8000")
+        
+        assert provider is not None
+        assert provider.provider_type == "recipe"
+        assert provider.base_url == "http://localhost:8000"
+    
+    def test_get_unknown_provider(self):
+        """Test getting unknown provider returns None."""
+        from praisonai.endpoints.registry import get_provider
+        
+        provider = get_provider("unknown-type")
+        
+        assert provider is None
+    
+    def test_provider_registry_class(self):
+        """Test ProviderRegistry class."""
+        from praisonai.endpoints.registry import ProviderRegistry
+        
+        registry = ProviderRegistry()
+        
+        assert "recipe" in registry.list_types()
+        
+        provider = registry.get("agents-api")
+        assert provider is not None
+
+
+class TestRecipeProvider:
+    """Tests for recipe provider."""
+    
+    def test_provider_info(self):
+        """Test recipe provider info."""
+        from praisonai.endpoints.providers.recipe import RecipeProvider
+        
+        provider = RecipeProvider()
+        info = provider.get_provider_info()
+        
+        assert info.type == "recipe"
+        assert "invoke" in info.capabilities
+    
+    @patch('praisonai.endpoints.providers.base.BaseProvider._make_request')
+    def test_list_endpoints(self, mock_request):
+        """Test listing recipe endpoints."""
+        from praisonai.endpoints.providers.recipe import RecipeProvider
+        
+        mock_request.return_value = {
+            "data": {
+                "recipes": [
+                    {"name": "recipe1", "description": "Test 1"},
+                    {"name": "recipe2", "description": "Test 2"},
+                ]
+            }
+        }
+        
+        provider = RecipeProvider()
+        endpoints = provider.list_endpoints()
+        
+        assert len(endpoints) == 2
+        assert endpoints[0].name == "recipe1"
+    
+    @patch('praisonai.endpoints.providers.base.BaseProvider._make_request')
+    def test_health_check(self, mock_request):
+        """Test recipe health check."""
+        from praisonai.endpoints.providers.recipe import RecipeProvider
+        
+        mock_request.return_value = {
+            "data": {"status": "healthy", "service": "recipe-runner"}
+        }
+        
+        provider = RecipeProvider()
+        health = provider.health()
+        
+        assert health.healthy is True
+        assert health.status == "healthy"
+
+
+class TestAgentsAPIProvider:
+    """Tests for agents-api provider."""
+    
+    def test_provider_info(self):
+        """Test agents-api provider info."""
+        from praisonai.endpoints.providers.agents_api import AgentsAPIProvider
+        
+        provider = AgentsAPIProvider()
+        info = provider.get_provider_info()
+        
+        assert info.type == "agents-api"
+    
+    @patch('praisonai.endpoints.providers.base.BaseProvider._make_request')
+    def test_invoke(self, mock_request):
+        """Test invoking agents-api endpoint."""
+        from praisonai.endpoints.providers.agents_api import AgentsAPIProvider
+        
+        mock_request.return_value = {
+            "status": 200,
+            "data": {"response": "Hello!"}
+        }
+        
+        provider = AgentsAPIProvider()
+        result = provider.invoke("test-agent", {"query": "Hi"})
+        
+        assert result.ok is True
+        assert result.data == "Hello!"
+
+
+class TestA2AProvider:
+    """Tests for A2A provider."""
+    
+    def test_provider_info(self):
+        """Test A2A provider info."""
+        from praisonai.endpoints.providers.a2a import A2AProvider
+        
+        provider = A2AProvider()
+        info = provider.get_provider_info()
+        
+        assert info.type == "a2a"
+        assert "agent-card" in info.capabilities
+
+
+class TestA2UProvider:
+    """Tests for A2U provider."""
+    
+    def test_provider_info(self):
+        """Test A2U provider info."""
+        from praisonai.endpoints.providers.a2u import A2UProvider
+        
+        provider = A2UProvider()
+        info = provider.get_provider_info()
+        
+        assert info.type == "a2u"
+        assert "subscribe" in info.capabilities
+
+
+class TestEndpointsCLI:
+    """Tests for endpoints CLI."""
+    
+    def test_handler_initialization(self):
+        """Test CLI handler initialization."""
+        from praisonai.cli.features.endpoints import EndpointsHandler
+        
+        handler = EndpointsHandler()
+        
+        assert handler.base_url == "http://localhost:8765"
+    
+    def test_help_command(self):
+        """Test help command."""
+        from praisonai.cli.features.endpoints import EndpointsHandler
+        
+        handler = EndpointsHandler()
+        result = handler.handle(["help"])
+        
+        assert result == 0
+    
+    def test_types_command(self):
+        """Test types command."""
+        from praisonai.cli.features.endpoints import EndpointsHandler
+        
+        handler = EndpointsHandler()
+        result = handler.cmd_types(["--format", "json"])
+        
+        assert result == 0
+    
+    def test_parse_args(self):
+        """Test argument parsing."""
+        from praisonai.cli.features.endpoints import EndpointsHandler
+        
+        handler = EndpointsHandler()
+        spec = {
+            "name": {"positional": True, "default": ""},
+            "url": {"default": None},
+            "json": {"flag": True, "default": False},
+        }
+        
+        parsed = handler._parse_args(["my-endpoint", "--url", "http://test", "--json"], spec)
+        
+        assert parsed["name"] == "my-endpoint"
+        assert parsed["url"] == "http://test"
+        assert parsed["json"] is True
+
+
+class TestServeCLI:
+    """Tests for serve CLI."""
+    
+    def test_handler_initialization(self):
+        """Test serve handler initialization."""
+        from praisonai.cli.features.serve import ServeHandler
+        
+        handler = ServeHandler()
+        
+        assert handler.DEFAULT_PORT == 8765
+    
+    def test_help_command(self):
+        """Test help command."""
+        from praisonai.cli.features.serve import ServeHandler
+        
+        handler = ServeHandler()
+        result = handler.handle(["help"])
+        
+        assert result == 0
+    
+    def test_parse_args(self):
+        """Test argument parsing."""
+        from praisonai.cli.features.serve import ServeHandler
+        
+        handler = ServeHandler()
+        spec = {
+            "host": {"default": "127.0.0.1"},
+            "port": {"default": 8765, "type": "int"},
+            "reload": {"flag": True, "default": False},
+        }
+        
+        parsed = handler._parse_args(["--host", "0.0.0.0", "--port", "9000", "--reload"], spec)
+        
+        assert parsed["host"] == "0.0.0.0"
+        assert parsed["port"] == 9000
+        assert parsed["reload"] is True
+
+
+class TestA2UServer:
+    """Tests for A2U server components."""
+    
+    def test_event_creation(self):
+        """Test A2U event creation."""
+        from praisonai.endpoints.a2u_server import A2UEvent
+        
+        event = A2UEvent(event_type="test", data={"key": "value"})
+        
+        assert event.event_type == "test"
+        assert event.data["key"] == "value"
+        assert event.event_id is not None
+    
+    def test_event_to_sse(self):
+        """Test converting event to SSE format."""
+        from praisonai.endpoints.a2u_server import A2UEvent
+        
+        event = A2UEvent(event_type="message", data={"text": "hello"})
+        sse = event.to_sse()
+        
+        assert "event: message" in sse
+        assert "data:" in sse
+        assert "hello" in sse
+    
+    def test_subscription_creation(self):
+        """Test A2U subscription creation."""
+        from praisonai.endpoints.a2u_server import A2USubscription
+        
+        sub = A2USubscription(
+            subscription_id="sub-123",
+            stream_name="events",
+            filters=["agent.started", "agent.completed"],
+        )
+        
+        assert sub.subscription_id == "sub-123"
+        assert sub.stream_name == "events"
+        assert len(sub.filters) == 2
+    
+    def test_subscription_matches_event(self):
+        """Test subscription event matching."""
+        from praisonai.endpoints.a2u_server import A2USubscription, A2UEvent
+        
+        sub = A2USubscription(
+            subscription_id="sub-123",
+            stream_name="events",
+            filters=["agent.started"],
+        )
+        
+        event1 = A2UEvent(event_type="agent.started", data={})
+        event2 = A2UEvent(event_type="agent.completed", data={})
+        
+        assert sub.matches_event(event1) is True
+        assert sub.matches_event(event2) is False
+    
+    def test_subscription_matches_all_without_filters(self):
+        """Test subscription matches all events without filters."""
+        from praisonai.endpoints.a2u_server import A2USubscription, A2UEvent
+        
+        sub = A2USubscription(
+            subscription_id="sub-123",
+            stream_name="events",
+        )
+        
+        event = A2UEvent(event_type="any.event", data={})
+        
+        assert sub.matches_event(event) is True
+    
+    def test_event_bus_subscribe(self):
+        """Test event bus subscription."""
+        from praisonai.endpoints.a2u_server import A2UEventBus
+        
+        bus = A2UEventBus()
+        sub = bus.subscribe("events", ["agent.started"])
+        
+        assert sub.subscription_id.startswith("sub-")
+        assert sub.stream_name == "events"
+    
+    def test_event_bus_unsubscribe(self):
+        """Test event bus unsubscription."""
+        from praisonai.endpoints.a2u_server import A2UEventBus
+        
+        bus = A2UEventBus()
+        sub = bus.subscribe("events")
+        
+        result = bus.unsubscribe(sub.subscription_id)
+        assert result is True
+        
+        result = bus.unsubscribe("nonexistent")
+        assert result is False
+    
+    def test_emit_helpers(self):
+        """Test emit helper functions."""
+        from praisonai.endpoints.a2u_server import (
+            emit_agent_started,
+            emit_agent_thinking,
+            emit_agent_response,
+            emit_agent_completed,
+            emit_agent_error,
+        )
+        
+        # These should not raise
+        emit_agent_started("agent-1", "TestAgent")
+        emit_agent_thinking("agent-1", "Processing...")
+        emit_agent_response("agent-1", "Hello!")
+        emit_agent_completed("agent-1", {"result": "done"})
+        emit_agent_error("agent-1", "Something went wrong")
+
+
+class TestServerUtilities:
+    """Tests for server utilities."""
+    
+    def test_add_discovery_routes(self):
+        """Test adding discovery routes to app."""
+        from praisonai.endpoints.server import add_discovery_routes
+        from praisonai.endpoints.discovery import create_discovery_document
+        
+        # Mock FastAPI app
+        mock_app = MagicMock()
+        mock_app.add_api_route = MagicMock()
+        
+        discovery = create_discovery_document()
+        add_discovery_routes(mock_app, discovery)
+        
+        # Should have added routes
+        assert mock_app.add_api_route.called
+
+
+if __name__ == "__main__":
+    pytest.main([__file__, "-v"])

src/praisonai/tests/unit/test_registry.py

@@ -0,0 +1,364 @@
+"""
+Unit tests for recipe registry module.
+
+Tests LocalRegistry, HttpRegistry, and server components.
+"""
+
+import json
+import tarfile
+from pathlib import Path
+from unittest.mock import MagicMock, patch
+import pytest
+
+from praisonai.recipe.registry import (
+    LocalRegistry,
+    HttpRegistry,
+    RemoteRegistry,
+    get_registry,
+    RegistryError,
+    RecipeNotFoundError,
+    RecipeExistsError,
+    _calculate_checksum,
+    _get_timestamp,
+    _normalize_name,
+    _validate_name,
+    _validate_version,
+    _atomic_write,
+    _atomic_write_json,
+    DEFAULT_REGISTRY_PATH,
+    DEFAULT_REGISTRY_PORT,
+)
+
+
+class TestHelperFunctions:
+    """Test helper functions."""
+    
+    def test_get_timestamp(self):
+        """Test timestamp generation."""
+        ts = _get_timestamp()
+        assert ts is not None
+        assert "T" in ts  # ISO format
+    
+    def test_calculate_checksum(self, tmp_path):
+        """Test checksum calculation."""
+        test_file = tmp_path / "test.txt"
+        test_file.write_text("hello world")
+        
+        checksum = _calculate_checksum(test_file)
+        assert len(checksum) == 64  # SHA256 hex
+        
+        # Same content should give same checksum
+        test_file2 = tmp_path / "test2.txt"
+        test_file2.write_text("hello world")
+        assert _calculate_checksum(test_file2) == checksum
+    
+    def test_normalize_name(self):
+        """Test name normalization."""
+        assert _normalize_name("My-Recipe") == "my-recipe"
+        assert _normalize_name("my_recipe") == "my-recipe"
+        assert _normalize_name("My.Recipe") == "my-recipe"
+        assert _normalize_name("my--recipe") == "my-recipe"
+    
+    def test_validate_name(self):
+        """Test name validation."""
+        assert _validate_name("my-recipe") is True
+        assert _validate_name("my_recipe") is True
+        assert _validate_name("MyRecipe123") is True
+        assert _validate_name("") is False
+        assert _validate_name("-invalid") is False
+        assert _validate_name("a" * 200) is False  # Too long
+    
+    def test_validate_version(self):
+        """Test version validation."""
+        assert _validate_version("1.0.0") is True
+        assert _validate_version("0.1.0") is True
+        assert _validate_version("1.0.0-alpha") is True
+        assert _validate_version("1.0.0.beta1") is True
+        assert _validate_version("") is False
+        assert _validate_version("1.0") is False  # Missing patch
+        assert _validate_version("invalid") is False
+    
+    def test_atomic_write(self, tmp_path):
+        """Test atomic write."""
+        test_file = tmp_path / "test.txt"
+        _atomic_write(test_file, b"hello world")
+        
+        assert test_file.exists()
+        assert test_file.read_bytes() == b"hello world"
+    
+    def test_atomic_write_json(self, tmp_path):
+        """Test atomic JSON write."""
+        test_file = tmp_path / "test.json"
+        data = {"key": "value", "number": 42}
+        _atomic_write_json(test_file, data)
+        
+        assert test_file.exists()
+        loaded = json.loads(test_file.read_text())
+        assert loaded == data
+
+
+class TestLocalRegistry:
+    """Test LocalRegistry class."""
+    
+    @pytest.fixture
+    def registry(self, tmp_path):
+        """Create a temporary registry."""
+        return LocalRegistry(tmp_path / "registry")
+    
+    @pytest.fixture
+    def sample_bundle(self, tmp_path):
+        """Create a sample .praison bundle."""
+        bundle_dir = tmp_path / "bundle"
+        bundle_dir.mkdir()
+        
+        manifest = {
+            "name": "test-recipe",
+            "version": "1.0.0",
+            "description": "A test recipe",
+            "tags": ["test", "sample"],
+            "author": "test",
+            "files": ["recipe.yaml"],
+        }
+        
+        (bundle_dir / "manifest.json").write_text(json.dumps(manifest))
+        (bundle_dir / "recipe.yaml").write_text("name: test")
+        
+        bundle_path = tmp_path / "test-recipe-1.0.0.praison"
+        with tarfile.open(bundle_path, "w:gz") as tar:
+            tar.add(bundle_dir / "manifest.json", arcname="manifest.json")
+            tar.add(bundle_dir / "recipe.yaml", arcname="recipe.yaml")
+        
+        return bundle_path
+    
+    def test_init_creates_structure(self, registry):
+        """Test registry initialization creates directory structure."""
+        assert registry.path.exists()
+        assert registry.recipes_path.exists()
+        assert registry.index_path.exists()
+    
+    def test_publish_bundle(self, registry, sample_bundle):
+        """Test publishing a bundle."""
+        result = registry.publish(sample_bundle)
+        
+        assert result["name"] == "test-recipe"
+        assert result["version"] == "1.0.0"
+        assert "checksum" in result
+        assert "published_at" in result
+    
+    def test_publish_duplicate_fails(self, registry, sample_bundle):
+        """Test publishing duplicate version fails."""
+        registry.publish(sample_bundle)
+        
+        with pytest.raises(RecipeExistsError):
+            registry.publish(sample_bundle)
+    
+    def test_publish_force_overwrites(self, registry, sample_bundle):
+        """Test force publish overwrites existing."""
+        registry.publish(sample_bundle)
+        result = registry.publish(sample_bundle, force=True)
+        
+        assert result["name"] == "test-recipe"
+    
+    def test_publish_invalid_bundle(self, registry, tmp_path):
+        """Test publishing invalid bundle fails."""
+        invalid_bundle = tmp_path / "invalid.praison"
+        invalid_bundle.write_text("not a tarball")
+        
+        with pytest.raises(RegistryError):
+            registry.publish(invalid_bundle)
+    
+    def test_pull_recipe(self, registry, sample_bundle, tmp_path):
+        """Test pulling a recipe."""
+        registry.publish(sample_bundle)
+        
+        output_dir = tmp_path / "output"
+        result = registry.pull("test-recipe", output_dir=output_dir)
+        
+        assert result["name"] == "test-recipe"
+        assert result["version"] == "1.0.0"
+        assert (output_dir / "test-recipe" / "manifest.json").exists()
+    
+    def test_pull_specific_version(self, registry, sample_bundle, tmp_path):
+        """Test pulling specific version."""
+        registry.publish(sample_bundle)
+        
+        output_dir = tmp_path / "output"
+        result = registry.pull("test-recipe", version="1.0.0", output_dir=output_dir)
+        
+        assert result["version"] == "1.0.0"
+    
+    def test_pull_not_found(self, registry, tmp_path):
+        """Test pulling non-existent recipe."""
+        with pytest.raises(RecipeNotFoundError):
+            registry.pull("nonexistent")
+    
+    def test_list_recipes(self, registry, sample_bundle):
+        """Test listing recipes."""
+        registry.publish(sample_bundle)
+        
+        recipes = registry.list_recipes()
+        
+        assert len(recipes) == 1
+        assert recipes[0]["name"] == "test-recipe"
+    
+    def test_list_recipes_with_tags(self, registry, sample_bundle):
+        """Test listing recipes filtered by tags."""
+        registry.publish(sample_bundle)
+        
+        # Should find with matching tag
+        recipes = registry.list_recipes(tags=["test"])
+        assert len(recipes) == 1
+        
+        # Should not find with non-matching tag
+        recipes = registry.list_recipes(tags=["nonexistent"])
+        assert len(recipes) == 0
+    
+    def test_search_recipes(self, registry, sample_bundle):
+        """Test searching recipes."""
+        registry.publish(sample_bundle)
+        
+        # Search by name
+        results = registry.search("test")
+        assert len(results) == 1
+        
+        # Search by tag (search includes tags)
+        results = registry.search("sample")
+        assert len(results) == 1  # "sample" is in tags
+        
+        # Search for non-existent term
+        results = registry.search("nonexistent")
+        assert len(results) == 0
+    
+    def test_get_versions(self, registry, sample_bundle):
+        """Test getting versions."""
+        registry.publish(sample_bundle)
+        
+        versions = registry.get_versions("test-recipe")
+        assert "1.0.0" in versions
+    
+    def test_get_info(self, registry, sample_bundle):
+        """Test getting recipe info."""
+        registry.publish(sample_bundle)
+        
+        info = registry.get_info("test-recipe")
+        assert info["name"] == "test-recipe"
+        assert info["version"] == "1.0.0"
+    
+    def test_delete_version(self, registry, sample_bundle):
+        """Test deleting specific version."""
+        registry.publish(sample_bundle)
+        
+        result = registry.delete("test-recipe", version="1.0.0")
+        assert result is True
+        
+        with pytest.raises(RecipeNotFoundError):
+            registry.get_info("test-recipe")
+    
+    def test_delete_all_versions(self, registry, sample_bundle):
+        """Test deleting all versions."""
+        registry.publish(sample_bundle)
+        
+        result = registry.delete("test-recipe")
+        assert result is True
+        
+        with pytest.raises(RecipeNotFoundError):
+            registry.get_versions("test-recipe")
+
+
+class TestHttpRegistry:
+    """Test HttpRegistry class."""
+    
+    @pytest.fixture
+    def registry(self):
+        """Create an HttpRegistry instance."""
+        return HttpRegistry("http://localhost:7777", token="test-token")
+    
+    def test_init(self, registry):
+        """Test initialization."""
+        assert registry.url == "http://localhost:7777"
+        assert registry.token == "test-token"
+        assert registry.timeout == 30
+    
+    def test_get_headers(self, registry):
+        """Test header generation."""
+        headers = registry._get_headers()
+        assert headers["Content-Type"] == "application/json"
+        assert headers["Authorization"] == "Bearer test-token"
+    
+    def test_get_headers_no_token(self):
+        """Test headers without token."""
+        registry = HttpRegistry("http://localhost:7777")
+        registry.token = None
+        headers = registry._get_headers()
+        assert "Authorization" not in headers
+    
+    @patch("urllib.request.urlopen")
+    def test_health_check(self, mock_urlopen, registry):
+        """Test health check."""
+        mock_response = MagicMock()
+        mock_response.read.return_value = b'{"ok": true, "status": "healthy"}'
+        mock_response.headers = {}
+        mock_response.__enter__ = lambda s: mock_response
+        mock_response.__exit__ = MagicMock(return_value=False)
+        mock_urlopen.return_value = mock_response
+        
+        result = registry.health()
+        assert result["ok"] is True
+    
+    @patch("urllib.request.urlopen")
+    def test_list_recipes(self, mock_urlopen, registry):
+        """Test listing recipes."""
+        mock_response = MagicMock()
+        mock_response.read.return_value = b'{"recipes": [{"name": "test"}]}'
+        mock_response.headers = {}
+        mock_response.__enter__ = lambda s: mock_response
+        mock_response.__exit__ = MagicMock(return_value=False)
+        mock_urlopen.return_value = mock_response
+        
+        recipes = registry.list_recipes()
+        assert len(recipes) == 1
+    
+    def test_remote_registry_alias(self):
+        """Test RemoteRegistry is alias for HttpRegistry."""
+        assert RemoteRegistry is HttpRegistry
+
+
+class TestGetRegistry:
+    """Test get_registry factory function."""
+    
+    def test_default_returns_local(self):
+        """Test default returns LocalRegistry."""
+        registry = get_registry()
+        assert isinstance(registry, LocalRegistry)
+    
+    def test_http_url_returns_http(self):
+        """Test HTTP URL returns HttpRegistry."""
+        registry = get_registry("http://localhost:7777")
+        assert isinstance(registry, HttpRegistry)
+    
+    def test_https_url_returns_http(self):
+        """Test HTTPS URL returns HttpRegistry."""
+        registry = get_registry("https://registry.example.com")
+        assert isinstance(registry, HttpRegistry)
+    
+    def test_path_returns_local(self, tmp_path):
+        """Test path returns LocalRegistry."""
+        registry = get_registry(str(tmp_path))
+        assert isinstance(registry, LocalRegistry)
+    
+    def test_token_passed_to_http(self):
+        """Test token is passed to HttpRegistry."""
+        registry = get_registry("http://localhost:7777", token="secret")
+        assert registry.token == "secret"
+
+
+class TestConstants:
+    """Test module constants."""
+    
+    def test_default_registry_path(self):
+        """Test default registry path."""
+        assert DEFAULT_REGISTRY_PATH == Path.home() / ".praison" / "registry"
+    
+    def test_default_registry_port(self):
+        """Test default registry port."""
+        assert DEFAULT_REGISTRY_PORT == 7777