Release v4.6.64

- Add PlatformCapabilities dataclass in core protocols
- Enhance registry to store and retrieve capabilities
- Update Telegram and Discord adapters with specific capabilities
- Update chunking to respect platform-specific length units
- Add unified delivery module that uses capabilities

This enables uniform delivery features (streaming, rate limiting, chunking)
across all platforms without per-adapter special cases.

Co-authored-by: praisonai-triage-agent[bot] <272766704+praisonai-triage-agent[bot]@users.noreply.github.com>
Co-authored-by: Mervin Praison <[email protected]>

.github/workflows/claude.yml

@@ -200,6 +200,7 @@ jobs:
           allowed_bots: 'praisonai-triage-agent[bot]'
           claude_code_oauth_token: ${{ secrets.CLAUDE_CODE_OAUTH_TOKEN }}
           github_token: ${{ steps.app-token.outputs.token }}
+          model: opus
           trigger_phrase: "@claude"
           label_trigger: "claude"
 

.github/workflows/docker-publish.yml

@@ -22,8 +22,6 @@ jobs:
         uses: actions/checkout@v4
         with:
           persist-credentials: false
-        with:
-          persist-credentials: false
 
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3

.github/workflows/gemini-issue-automated-triage.yml

@@ -36,9 +36,6 @@ jobs:
         uses: actions/checkout@v4
         with:
           persist-credentials: false
-        with:
-          persist-credentials: false
-        with:
           token: ${{ steps.generate_token.outputs.token }}
 
       - name: Run Gemini Issue Triage

.github/workflows/gemini-issue-review.yml

@@ -37,9 +37,6 @@ jobs:
         uses: actions/checkout@v4
         with:
           persist-credentials: false
-        with:
-          persist-credentials: false
-        with:
           token: ${{ steps.generate_token.outputs.token }}
 
       - name: Set up Git

.github/workflows/gemini-pr-review.yml

@@ -48,9 +48,6 @@ jobs:
         uses: actions/checkout@v4
         with:
           persist-credentials: false
-        with:
-          persist-credentials: false
-        with:
           token: ${{ steps.generate_token.outputs.token }}
           ref: ${{ steps.checkout_ref.outputs.ref }}
           fetch-depth: 0

.github/workflows/integration-cross-repo.yml

@@ -60,16 +60,16 @@ jobs:
     - name: Run PraisonAI integration tests
       run: |
         cd PraisonAI/src/praisonai
-        python -m pytest tests/integration/test_aiui_* -v --timeout=300
+        python -m pytest tests/integration/test_aiui_* -v
         
     - name: Run PraisonAIUI integration tests
       run: |
         cd PraisonAIUI
         if [ -f tests/integration/test_agentic_roundtrip.py ]; then
-          python -m pytest tests/integration/test_agentic_roundtrip.py -v --timeout=300
+          python -m pytest tests/integration/test_agentic_roundtrip.py -v
         fi
         if [ -f tests/test_feature_sdk_backends.py ]; then
-          python -m pytest tests/test_feature_sdk_backends.py -v --timeout=300
+          python -m pytest tests/test_feature_sdk_backends.py -v
         fi
         
     - name: Test Pattern C CLI
@@ -152,7 +152,7 @@ jobs:
       run: |
         cd PraisonAI/src/praisonai
         if [ -n "$OPENAI_API_KEY" ]; then
-          python -m pytest tests/integration/test_aiui_host_agentic.py -v --timeout=600
+          python -m pytest tests/integration/test_aiui_host_agentic.py -v
         else
           echo "OPENAI_API_KEY not available, skipping agentic tests"
         fi

.github/workflows/python-package.yml

@@ -15,8 +15,8 @@ jobs:
 
     steps:
     - uses: actions/checkout@v4
-        with:
-          persist-credentials: false
+      with:
+        persist-credentials: false
     - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v5
       with:

.github/workflows/release.yml

@@ -26,11 +26,8 @@ jobs:
     # First checkout the upstream repo at the specified tag
     - name: Checkout upstream repo
       uses: actions/checkout@v4
-        with:
-          persist-credentials: false
-        with:
-          persist-credentials: false
       with:
+        persist-credentials: false
         repository: MervinPraison/PraisonAI
         ref: ${{ github.event.inputs.tag }}
         fetch-depth: 0
@@ -48,11 +45,8 @@ jobs:
     # Now checkout the fork at main branch
     - name: Checkout fork
       uses: actions/checkout@v4
-        with:
-          persist-credentials: false
-        with:
-          persist-credentials: false
       with:
+        persist-credentials: false
         repository: ${{ github.event.inputs.fork_owner }}/PraisonAI
         ref: main
         fetch-depth: 0
@@ -449,11 +443,8 @@ jobs:
     # First checkout the fork's main branch
     - name: Checkout fork repo
       uses: actions/checkout@v4
-        with:
-          persist-credentials: false
-        with:
-          persist-credentials: false
       with:
+        persist-credentials: false
         fetch-depth: 0
         token: ${{ secrets.PAT_TOKEN }}
         repository: ${{ github.event.inputs.fork_owner }}/PraisonAI

.github/workflows/sync-secrets-to-aiui.yml

@@ -0,0 +1,31 @@
+name: Sync Claude Secrets to PraisonAIUI
+
+on:
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+jobs:
+  sync:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Sync secrets to PraisonAIUI
+        env:
+          GH_TOKEN: ${{ secrets.SECRETS_ADMIN_PAT }}
+          TARGET: MervinPraison/PraisonAIUI
+          CLAUDE_APP_ID: ${{ secrets.CLAUDE_APP_ID }}
+          CLAUDE_APP_PRIVATE_KEY: ${{ secrets.CLAUDE_APP_PRIVATE_KEY }}
+          CLAUDE_CODE_OAUTH_TOKEN: ${{ secrets.CLAUDE_CODE_OAUTH_TOKEN }}
+          GH_TOKEN_VALUE: ${{ secrets.GH_TOKEN }}
+        run: |
+          set -euo pipefail
+          if [ -z "${GH_TOKEN:-}" ]; then
+            echo "SECRETS_ADMIN_PAT is not configured in this repository"
+            exit 1
+          fi
+          echo -n "$CLAUDE_APP_ID" | gh secret set CLAUDE_APP_ID --repo "$TARGET"
+          echo -n "$CLAUDE_APP_PRIVATE_KEY" | gh secret set CLAUDE_APP_PRIVATE_KEY --repo "$TARGET"
+          echo -n "$CLAUDE_CODE_OAUTH_TOKEN" | gh secret set CLAUDE_CODE_OAUTH_TOKEN --repo "$TARGET"
+          echo -n "$GH_TOKEN_VALUE" | gh secret set GH_TOKEN --repo "$TARGET"
+          echo "Synced CLAUDE_APP_ID, CLAUDE_APP_PRIVATE_KEY, CLAUDE_CODE_OAUTH_TOKEN, GH_TOKEN → $TARGET"

.github/workflows/test-comprehensive.yml

@@ -37,10 +37,8 @@ jobs:
     steps:
     - name: Checkout code
       uses: actions/checkout@v4
-        with:
-          persist-credentials: false
-        with:
-          persist-credentials: false
+      with:
+        persist-credentials: false
 
     - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v5

.github/workflows/test-core.yml

@@ -22,8 +22,8 @@ jobs:
 
     steps:
     - uses: actions/checkout@v4
-        with:
-          persist-credentials: false
+      with:
+        persist-credentials: false
     - name: Set up Python 3.11
       uses: actions/setup-python@v5
       with:

.github/workflows/test-extended.yml

@@ -13,10 +13,8 @@ jobs:
     steps:
     - name: Checkout code
       uses: actions/checkout@v4
-        with:
-          persist-credentials: false
-        with:
-          persist-credentials: false
+      with:
+        persist-credentials: false
 
     - name: Set up Python
       uses: actions/setup-python@v5
@@ -81,10 +79,8 @@ jobs:
     steps:
     - name: Checkout code
       uses: actions/checkout@v4
-        with:
-          persist-credentials: false
-        with:
-          persist-credentials: false
+      with:
+        persist-credentials: false
 
     - name: Set up Python
       uses: actions/setup-python@v5

.github/workflows/test-frameworks.yml

@@ -33,10 +33,8 @@ jobs:
     steps:
     - name: Checkout code
       uses: actions/checkout@v4
-        with:
-          persist-credentials: false
-        with:
-          persist-credentials: false
+      with:
+        persist-credentials: false
 
     - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v5

.github/workflows/test-optimized.yml

@@ -45,8 +45,8 @@ jobs:
     timeout-minutes: 5
     steps:
     - uses: actions/checkout@v4
-        with:
-          persist-credentials: false
+      with:
+        persist-credentials: false
     - name: Set up Python 3.11
       uses: actions/setup-python@v5
       with:
@@ -105,8 +105,8 @@ jobs:
     
     steps:
     - uses: actions/checkout@v4
-        with:
-          persist-credentials: false
+      with:
+        persist-credentials: false
     - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v5
       with:
@@ -187,8 +187,8 @@ jobs:
         fi
     
     - uses: actions/checkout@v4
-        with:
-          persist-credentials: false
+      with:
+        persist-credentials: false
       if: steps.check-key.outputs.has_key == 'true'
     
     - name: Set up Python 3.11
@@ -259,8 +259,8 @@ jobs:
         fi
     
     - uses: actions/checkout@v4
-        with:
-          persist-credentials: false
+      with:
+        persist-credentials: false
       if: steps.check-key.outputs.has_key == 'true'
     
     - name: Set up Python 3.11
@@ -318,8 +318,8 @@ jobs:
         fi
     
     - uses: actions/checkout@v4
-        with:
-          persist-credentials: false
+      with:
+        persist-credentials: false
       if: steps.check-key.outputs.has_key == 'true'
     
     - name: Set up Python 3.11
@@ -377,8 +377,8 @@ jobs:
         fi
     
     - uses: actions/checkout@v4
-        with:
-          persist-credentials: false
+      with:
+        persist-credentials: false
       if: steps.check-key.outputs.has_key == 'true'
     
     - name: Set up Python 3.11
@@ -436,8 +436,8 @@ jobs:
         fi
     
     - uses: actions/checkout@v4
-        with:
-          persist-credentials: false
+      with:
+        persist-credentials: false
       if: steps.check-key.outputs.has_key == 'true'
     
     - name: Set up Python 3.11
@@ -495,8 +495,8 @@ jobs:
         fi
     
     - uses: actions/checkout@v4
-        with:
-          persist-credentials: false
+      with:
+        persist-credentials: false
       if: steps.check-key.outputs.has_key == 'true'
     
     - name: Set up Python 3.11

.github/workflows/test-real.yml

@@ -45,10 +45,8 @@ jobs:
         
     - name: Checkout code
       uses: actions/checkout@v4
-        with:
-          persist-credentials: false
-        with:
-          persist-credentials: false
+      with:
+        persist-credentials: false
 
     - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v5

AGENTS.md

@@ -0,0 +1,10 @@
+# Agent Instructions
+
+You are working on the PraisonAI project.
+
+## Project Guidelines
+- Follow the existing code style and conventions
+- Be concise and helpful in responses  
+- Test implementation thoroughly
+- Ensure backward compatibility with existing APIs
+- Follow protocol-driven design: core protocols in praisonaiagents/, heavy implementations in praisonai/

README.md

@@ -770,11 +770,11 @@ agent.start('Write a movie script about a robot in Mars');
 
 ## ⚡ Performance
 
-PraisonAI is built for speed, with agent instantiation in under 4μs. This reduces overhead, improves responsiveness, and helps multi-agent systems scale efficiently in real-world production workloads.
+PraisonAI is built for speed, with agent instantiation in around 14μs. This reduces overhead, improves responsiveness, and helps multi-agent systems scale efficiently in real-world production workloads.
 
 | Performance Metric | PraisonAI |
 |--------------------|-----------|
-| Avg Instantiation Time | **3.77 μs** |
+| Avg Instantiation Time | **14 μs** |
 
 ---
 

api.md

@@ -59,6 +59,8 @@ Methods:
 * <code title="class Agent">Agent.<a href="./src/praisonai-agents/praisonaiagents/agent/agent.py">handoff_to</a>(target_agent: 'Agent', prompt: str, context: Optional[Dict[str, Any]] = None, config: Optional['HandoffConfig'] = None) -> 'HandoffResult'</code>
 * <code title="class Agent">Agent.<a href="./src/praisonai-agents/praisonaiagents/agent/agent.py">handoff_to_async</a>(target_agent: 'Agent', prompt: str, context: Optional[Dict[str, Any]] = None, config: Optional['HandoffConfig'] = None) -> 'HandoffResult'</code>
 * <code title="class Agent">Agent.<a href="./src/praisonai-agents/praisonaiagents/agent/agent.py">is_closed</a>() -> bool</code>
+* <code title="class Agent">Agent.<a href="./src/praisonai-agents/praisonaiagents/agent/agent.py">llm_instance</a>()</code>
+* <code title="class Agent">Agent.<a href="./src/praisonai-agents/praisonaiagents/agent/agent.py">llm_instance</a>(value)</code>
 * <code title="class Agent">Agent.<a href="./src/praisonai-agents/praisonaiagents/agent/agent.py">llm_model</a>() -> Optional[str]</code>
 * <code title="class Agent">Agent.<a href="./src/praisonai-agents/praisonaiagents/agent/agent.py">output_style</a>() -> Optional[str]</code>
 * <code title="class Agent">Agent.<a href="./src/praisonai-agents/praisonaiagents/agent/agent.py">output_style</a>(value: Optional[str]) -> None</code>
@@ -240,6 +242,7 @@ from praisonaiagents import Memory, MemoryBackend, MemoryConfig
 
 Methods:
 
+* <code title="class Memory">Memory.<a href="./src/praisonai-agents/praisonaiagents/memory/memory.py">build_cache_optimized_context</a>(task_descr: str, user_id: Optional[str] = None, additional: str = '', max_items: int = 3, include_cache_boundary: bool = True, include_in_output: Optional[bool] = None) -> Dict[str, str]</code>
 * <code title="class Memory">Memory.<a href="./src/praisonai-agents/praisonaiagents/memory/memory.py">build_context_for_task</a>(task_descr: str, user_id: Optional[str] = None, additional: str = '', max_items: int = 3, include_in_output: Optional[bool] = None) -> str</code>
 * <code title="class Memory">Memory.<a href="./src/praisonai-agents/praisonaiagents/memory/memory.py">calculate_quality_metrics</a>(output: str, expected_output: str, llm: Optional[str] = None, custom_prompt: Optional[str] = None) -> Dict[str, float]</code>
 * <code title="class Memory">Memory.<a href="./src/praisonai-agents/praisonaiagents/memory/memory.py">close_connections</a>()</code>
@@ -515,10 +518,12 @@ Methods:
 * <code title="class Session">Session.<a href="./src/praisonai-agents/praisonaiagents/session/api.py">add_memory</a>(text: str, memory_type: str = 'long', **metadata) -> None</code>
 * <code title="class Session">Session.<a href="./src/praisonai-agents/praisonaiagents/session/api.py">chat</a>(message: str, **kwargs) -> str</code>
 * <code title="class Session">Session.<a href="./src/praisonai-agents/praisonaiagents/session/api.py">clear_memory</a>(memory_type: str = 'all') -> None</code>
+* <code title="class Session">Session.<a href="./src/praisonai-agents/praisonaiagents/session/api.py">close</a>() -> None</code>
 * <code title="class Session">Session.<a href="./src/praisonai-agents/praisonaiagents/session/api.py">create_agent</a>(*args, **kwargs) -> 'Agent'</code>
 * <code title="class Session">Session.<a href="./src/praisonai-agents/praisonaiagents/session/api.py">get_context</a>(query: str, max_items: int = 3) -> str</code>
 * <code title="class Session">Session.<a href="./src/praisonai-agents/praisonaiagents/session/api.py">get_state</a>(key: str, default: Any = None) -> Any</code>
 * <code title="class Session">Session.<a href="./src/praisonai-agents/praisonaiagents/session/api.py">increment_state</a>(key: str, increment: int = 1, default: int = 0) -> None</code>
+* <code title="class Session">Session.<a href="./src/praisonai-agents/praisonaiagents/session/api.py">is_expired</a>() -> bool</code>
 * <code title="class Session">Session.<a href="./src/praisonai-agents/praisonaiagents/session/api.py">knowledge</a>() -> 'Knowledge'</code>
 * <code title="class Session">Session.<a href="./src/praisonai-agents/praisonaiagents/session/api.py">memory</a>() -> 'Memory'</code>
 * <code title="class Session">Session.<a href="./src/praisonai-agents/praisonaiagents/session/api.py">restore_state</a>() -> Dict[str, Any]</code>
@@ -527,6 +532,7 @@ Methods:
 * <code title="class Session">Session.<a href="./src/praisonai-agents/praisonaiagents/session/api.py">search_memory</a>(query: str, memory_type: str = 'long', limit: int = 5) -> List[Dict[str, Any]]</code>
 * <code title="class Session">Session.<a href="./src/praisonai-agents/praisonaiagents/session/api.py">send_message</a>(message: str, **kwargs) -> str</code>
 * <code title="class Session">Session.<a href="./src/praisonai-agents/praisonaiagents/session/api.py">set_state</a>(key: str, value: Any) -> None</code>
+* <code title="class Session">Session.<a href="./src/praisonai-agents/praisonaiagents/session/api.py">time_to_expiry</a>() -> Optional[float]</code>
 
 # MCP
 
@@ -698,7 +704,7 @@ Methods:
 
 Types:
 ```python
-from praisonaiagents import AgentAppConfig, AgentAppProtocol, AgentFlow, AgentManager, AgentOSConfig, AgentOSProtocol, AgentTeam, AutoApproveBackend, EmbeddingResult, aembedding, aembeddings, embedding, embeddings, get_dimensions
+from praisonaiagents import AgentAppConfig, AgentAppProtocol, AgentFlow, AgentManager, AgentOSConfig, AgentOSProtocol, AgentTeam, AutoApproveBackend, EmbeddingResult, __version__, aembedding, aembeddings, embedding, embeddings, get_dimensions
 ```
 
 Methods:
@@ -794,6 +800,10 @@ Methods:
 * <code title="cli">praisonai agents list <a href="./src/praisonai/praisonai/cli/commands/agents.py">--help</a></code>
 * <code title="cli">praisonai app app <a href="./src/praisonai/praisonai/cli/commands/app.py">--help</a></code>
 * <code title="cli">praisonai audit agent-centric <a href="./src/praisonai/praisonai/cli/commands/audit.py">--help</a></code>
+* <code title="cli">praisonai auth list <a href="./src/praisonai/praisonai/cli/commands/auth.py">--help</a></code>
+* <code title="cli">praisonai auth login <a href="./src/praisonai/praisonai/cli/commands/auth.py">--help</a></code>
+* <code title="cli">praisonai auth logout <a href="./src/praisonai/praisonai/cli/commands/auth.py">--help</a></code>
+* <code title="cli">praisonai auth status <a href="./src/praisonai/praisonai/cli/commands/auth.py">--help</a></code>
 * <code title="cli">praisonai batch batch-run <a href="./src/praisonai/praisonai/cli/commands/batch.py">--help</a></code>
 * <code title="cli">praisonai batch list <a href="./src/praisonai/praisonai/cli/commands/batch.py">--help</a></code>
 * <code title="cli">praisonai batch report <a href="./src/praisonai/praisonai/cli/commands/batch.py">--help</a></code>
@@ -846,6 +856,9 @@ Methods:
 * <code title="cli">praisonai config path <a href="./src/praisonai/praisonai/cli/commands/config.py">--help</a></code>
 * <code title="cli">praisonai config reset <a href="./src/praisonai/praisonai/cli/commands/config.py">--help</a></code>
 * <code title="cli">praisonai config set <a href="./src/praisonai/praisonai/cli/commands/config.py">--help</a></code>
+* <code title="cli">praisonai config show <a href="./src/praisonai/praisonai/cli/commands/config.py">--help</a></code>
+* <code title="cli">praisonai config sources <a href="./src/praisonai/praisonai/cli/commands/config.py">--help</a></code>
+* <code title="cli">praisonai config validate <a href="./src/praisonai/praisonai/cli/commands/config.py">--help</a></code>
 * <code title="cli">praisonai context add <a href="./src/praisonai/praisonai/cli/commands/context.py">--help</a></code>
 * <code title="cli">praisonai context clear <a href="./src/praisonai/praisonai/cli/commands/context.py">--help</a></code>
 * <code title="cli">praisonai context compact <a href="./src/praisonai/praisonai/cli/commands/context.py">--help</a></code>
@@ -880,10 +893,12 @@ Methods:
 * <code title="cli">praisonai doctor db <a href="./src/praisonai/praisonai/cli/commands/doctor.py">--help</a></code>
 * <code title="cli">praisonai doctor doctor-callback <a href="./src/praisonai/praisonai/cli/commands/doctor.py">--help</a></code>
 * <code title="cli">praisonai doctor env <a href="./src/praisonai/praisonai/cli/commands/doctor.py">--help</a></code>
+* <code title="cli">praisonai doctor fix <a href="./src/praisonai/praisonai/cli/commands/doctor.py">--help</a></code>
 * <code title="cli">praisonai doctor mcp <a href="./src/praisonai/praisonai/cli/commands/doctor.py">--help</a></code>
 * <code title="cli">praisonai doctor network <a href="./src/praisonai/praisonai/cli/commands/doctor.py">--help</a></code>
 * <code title="cli">praisonai doctor packaging <a href="./src/praisonai/praisonai/cli/commands/doctor.py">--help</a></code>
 * <code title="cli">praisonai doctor performance <a href="./src/praisonai/praisonai/cli/commands/doctor.py">--help</a></code>
+* <code title="cli">praisonai doctor runtime <a href="./src/praisonai/praisonai/cli/commands/doctor.py">--help</a></code>
 * <code title="cli">praisonai doctor selftest <a href="./src/praisonai/praisonai/cli/commands/doctor.py">--help</a></code>
 * <code title="cli">praisonai doctor skills <a href="./src/praisonai/praisonai/cli/commands/doctor.py">--help</a></code>
 * <code title="cli">praisonai doctor tools <a href="./src/praisonai/praisonai/cli/commands/doctor.py">--help</a></code>
@@ -914,6 +929,9 @@ Methods:
 * <code title="cli">praisonai gateway install <a href="./src/praisonai/praisonai/cli/commands/gateway.py">--help</a></code>
 * <code title="cli">praisonai gateway logs <a href="./src/praisonai/praisonai/cli/commands/gateway.py">--help</a></code>
 * <code title="cli">praisonai gateway mint-link <a href="./src/praisonai/praisonai/cli/commands/gateway.py">--help</a></code>
+* <code title="cli">praisonai gateway pause <a href="./src/praisonai/praisonai/cli/commands/gateway.py">--help</a></code>
+* <code title="cli">praisonai gateway reconnect <a href="./src/praisonai/praisonai/cli/commands/gateway.py">--help</a></code>
+* <code title="cli">praisonai gateway resume <a href="./src/praisonai/praisonai/cli/commands/gateway.py">--help</a></code>
 * <code title="cli">praisonai gateway send <a href="./src/praisonai/praisonai/cli/commands/gateway.py">--help</a></code>
 * <code title="cli">praisonai gateway start <a href="./src/praisonai/praisonai/cli/commands/gateway.py">--help</a></code>
 * <code title="cli">praisonai gateway status <a href="./src/praisonai/praisonai/cli/commands/gateway.py">--help</a></code>
@@ -1004,6 +1022,14 @@ Methods:
 * <code title="cli">praisonai pairing list <a href="./src/praisonai/praisonai/cli/commands/pairing.py">--help</a></code>
 * <code title="cli">praisonai pairing revoke <a href="./src/praisonai/praisonai/cli/commands/pairing.py">--help</a></code>
 * <code title="cli">praisonai paths show <a href="./src/praisonai/praisonai/cli/commands/paths.py">--help</a></code>
+* <code title="cli">praisonai permissions allow <a href="./src/praisonai/praisonai/cli/commands/permissions.py">--help</a></code>
+* <code title="cli">praisonai permissions ask <a href="./src/praisonai/praisonai/cli/commands/permissions.py">--help</a></code>
+* <code title="cli">praisonai permissions deny <a href="./src/praisonai/praisonai/cli/commands/permissions.py">--help</a></code>
+* <code title="cli">praisonai permissions export <a href="./src/praisonai/praisonai/cli/commands/permissions.py">--help</a></code>
+* <code title="cli">praisonai permissions import-rules <a href="./src/praisonai/praisonai/cli/commands/permissions.py">--help</a></code>
+* <code title="cli">praisonai permissions list <a href="./src/praisonai/praisonai/cli/commands/permissions.py">--help</a></code>
+* <code title="cli">praisonai permissions remove <a href="./src/praisonai/praisonai/cli/commands/permissions.py">--help</a></code>
+* <code title="cli">praisonai permissions reset <a href="./src/praisonai/praisonai/cli/commands/permissions.py">--help</a></code>
 * <code title="cli">praisonai plugins create <a href="./src/praisonai/praisonai/cli/commands/plugins.py">--help</a></code>
 * <code title="cli">praisonai plugins disable <a href="./src/praisonai/praisonai/cli/commands/plugins.py">--help</a></code>
 * <code title="cli">praisonai plugins discover <a href="./src/praisonai/praisonai/cli/commands/plugins.py">--help</a></code>
@@ -1302,7 +1328,7 @@ export { // Python parity additions
 export { // Subagent Tool (agent-as-tool pattern)
   SubagentTool, BaseTool, FunctionTool, ToolRegistry, ToolResult, ToolValidationError, createDelegator, createSubagentTool, createSubagentTools, createTool, getRegistry, getTool, registerTool, tool, validateTool } from "./tools";
 export { airweaveSearch, bedrockBrowserClick, bedrockBrowserFill, bedrockBrowserNavigate, bedrockCodeInterpreter, codeExecution, codeMode, createCustomTool, exaSearch, firecrawlCrawl, firecrawlScrape, parallelSearch, perplexitySearch, registerCustomTool, registerLocalTool, registerNpmTool, superagentGuard, superagentRedact, superagentVerify, tavilyCrawl, tavilyExtract, tavilySearch, valyuBioSearch, valyuCompanyResearch, valyuEconomicsSearch, valyuFinanceSearch, valyuPaperSearch, valyuPatentSearch, valyuSecSearch, valyuWebSearch } from "./tools/builtins";
-export { BudgetExceededError, MissingDependencyError, MissingEnvVarError, ToolsRegistry, composeMiddleware, createLoggingMiddleware, createRateLimitMiddleware, createRedactionMiddleware, createRetryMiddleware, createTimeoutMiddleware, createToolsRegistry, createTracingMiddleware, createValidationMiddleware, getRegistry, getTool, getToolsRegistry, get_registry, get_tool, registerTool, register_tool, resetToolsRegistry, validateTool, validate_tool } from "./tools/registry";
+export { BudgetExceededError, MissingDependencyError, MissingEnvVarError, ToolsRegistry, composeMiddleware, createLoggingMiddleware, createRateLimitMiddleware, createRedactionMiddleware, createRetryMiddleware, createTimeoutMiddleware, createToolsRegistry, createTracingMiddleware, createValidationMiddleware, getToolsRegistry, get_registry, get_tool, register_tool, resetToolsRegistry, validate_tool } from "./tools/registry";
 export type { InstallHints, PraisonTool, RedactionHooks, RegisteredTool, ToolCapabilities, ToolExecutionContext, ToolExecutionResult, ToolFactory, ToolHooks, ToolInstallStatus, ToolLimits, ToolLogger, ToolMetadata, ToolMiddleware, ToolParameterProperty, ToolParameterSchema } from "./tools/registry";
 export { registerBuiltinTools, tools } from "./tools/tools";
 export { // Classes

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>=4.6.55" \
+    "praisonai>=4.6.64" \
     "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>=4.6.55" \
+    "praisonai>=4.6.64" \
     "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>=4.6.55" \
+    "praisonai>=4.6.64" \
     "praisonai[ui]" \
     "praisonai[crewai]"
 

examples/consolidated_params/advanced_workflow_full_features.py

@@ -32,7 +32,7 @@ workflow = AgentFlow(
         ),
     ],
     # Workflow-level consolidated params
-    output=WorkflowOutputConfig(output="verbose", stream=True),
+    output=WorkflowOutputConfig(verbose=True, stream=True),
     planning=WorkflowPlanningConfig(enabled=True, reasoning=True),
     memory=WorkflowMemoryConfig(backend="file"),
     # Agent-like params

examples/consolidated_params/basic_web.py

@@ -5,12 +5,12 @@ Demonstrates web search with consolidated params.
 Presets: duckduckgo, tavily, google, bing, serper, search_only, fetch_only
 """
 
-from praisonaiagents import Agent
+from praisonaiagents import Agent, WebConfig
 
-# Basic: Enable web search with preset
+# Basic: Enable web search with preset (search only — fetch needs Claude)
 agent = Agent(
     instructions="You are a research assistant with web access.",
-    web="duckduckgo",  # Presets: duckduckgo, tavily, google, bing, serper
+    web=WebConfig(search=True, fetch=False, search_provider="duckduckgo"),
 )
 
 if __name__ == "__main__":

examples/python/agents/code-agent.py

@@ -6,10 +6,18 @@ It includes self-reflection for improving code quality and multiple specialized
 """
 
 from praisonaiagents import Agent, Task, AgentTeam
-from praisonaiagents.tools import CodeInterpreter
 
-# Initialize code execution tool
-code_interpreter = CodeInterpreter()
+def run_python_code(code: str) -> str:
+    """Execute Python code safely and return stdout or errors."""
+    import io
+    import contextlib
+    try:
+        buf = io.StringIO()
+        with contextlib.redirect_stdout(buf):
+            exec(code, {"__builtins__": __builtins__})
+        return buf.getvalue() or "Executed successfully (no output)"
+    except Exception as e:
+        return f"Execution error: {e}"
 
 # Custom code analysis tool
 def analyze_code_complexity(code: str) -> str:
@@ -32,9 +40,7 @@ code_writer = Agent(
     goal="Write clean, efficient, and well-documented Python code",
     backstory="You are a senior Python developer with 10+ years of experience in writing production-quality code.",
     instructions="Write Python code that follows PEP 8 standards, includes proper error handling, and has clear documentation.",
-    reflection=True,
-    
-    
+    output="silent",
 )
 
 code_reviewer = Agent(
@@ -52,7 +58,7 @@ code_executor = Agent(
     goal="Safely execute and test Python code",
     backstory="You are responsible for running code and reporting results or errors.",
     instructions="Execute the provided code safely and report the output or any errors encountered.",
-    tools=[code_interpreter]
+    tools=[run_python_code]
 )
 
 # Example tasks
@@ -87,7 +93,7 @@ def demonstrate_code_agent():
     workflow = AgentTeam(
         agents=[code_writer, code_reviewer, code_executor],
         tasks=[write_task, review_task, execute_task],
-        process="sequential", output="verbose"
+        process="sequential", output="silent"
     )
     
     # Run the workflow
@@ -106,10 +112,8 @@ general_code_agent = Agent(
 3. Explain code concepts
 4. Refactor code for better performance
 5. Add tests and documentation""",
-    tools=[code_interpreter, analyze_code_complexity],
-    reflection=True,
-    
-    
+    tools=[run_python_code, analyze_code_complexity],
+    output="silent",
 )
 
 if __name__ == "__main__":

examples/python/agents/math-agent.py

@@ -41,21 +41,25 @@ def calculate_statistics(numbers: list) -> str:
     """Calculate basic statistics for a list of numbers."""
     if not numbers:
         return "No numbers provided"
-    
-    n = len(numbers)
-    mean = sum(numbers) / n
-    sorted_nums = sorted(numbers)
+    try:
+        nums = [float(x) for x in numbers]
+    except (TypeError, ValueError):
+        return "Error: all values must be numbers"
+
+    n = len(nums)
+    mean = sum(nums) / n
+    sorted_nums = sorted(nums)
     median = sorted_nums[n//2] if n % 2 else (sorted_nums[n//2-1] + sorted_nums[n//2]) / 2
-    variance = sum((x - mean)**2 for x in numbers) / n
+    variance = sum((x - mean)**2 for x in nums) / n
     std_dev = math.sqrt(variance)
-    
+
     return f"""Statistics:
 - Count: {n}
 - Mean: {mean:.4f}
 - Median: {median:.4f}
 - Standard Deviation: {std_dev:.4f}
-- Min: {min(numbers)}
-- Max: {max(numbers)}"""
+- Min: {min(nums)}
+- Max: {max(nums)}"""
 
 # Create specialized math agents
 calculation_agent = Agent(
@@ -66,8 +70,7 @@ calculation_agent = Agent(
     instructions="Perform the requested calculations step by step, showing your work clearly.",
     tools=[basic_calculator, solve_quadratic, calculate_statistics],
     reflection=True,
-    
-    
+    output="silent",
 )
 
 problem_solver_agent = Agent(
@@ -82,8 +85,7 @@ problem_solver_agent = Agent(
 4. Show each step of the solution
 5. Verify the answer makes sense""",
     reflection=True,
-    
-    
+    output="silent",
 )
 
 math_tutor_agent = Agent(
@@ -91,7 +93,8 @@ math_tutor_agent = Agent(
     role="Mathematics tutor and explainer",
     goal="Explain mathematical concepts clearly and help users understand math",
     backstory="You are a patient math tutor who can explain concepts at any level from elementary to advanced.",
-    instructions="Explain mathematical concepts using simple language, provide examples, and check for understanding."
+    instructions="Explain mathematical concepts using simple language, provide examples, and check for understanding.",
+    output="silent",
 )
 
 # Example workflow for solving complex problems
@@ -126,7 +129,8 @@ def solve_math_problem_workflow():
     workflow = AgentTeam(
         agents=[problem_solver_agent, calculation_agent, math_tutor_agent],
         tasks=[understand_task, solve_task, verify_task],
-        process="sequential", output="verbose"
+        process="sequential",
+        output="silent",
     )
     
     return workflow.start()
@@ -148,8 +152,7 @@ math_assistant = Agent(
 Always show your work step by step.""",
     tools=[basic_calculator, solve_quadratic, calculate_statistics],
     reflection=True,
-    
-    
+    output="silent",
 )
 
 if __name__ == "__main__":

examples/python/bot_run_control_example.py

@@ -0,0 +1,238 @@
+#!/usr/bin/env python3
+"""
+Example: Bot In-Flight Run Control
+
+Demonstrates how to use SessionRunControl to provide better UX for bots
+during long-running agent operations. Shows busy feedback, pending message
+handling, and /stop command support.
+
+This example shows the "before" and "after" behavior described in issue #1914.
+"""
+
+import asyncio
+import time
+from typing import Optional
+
+# Mock agent for demonstration
+class MockAgent:
+    """Simple mock agent that simulates long-running tasks."""
+    
+    def __init__(self, name="assistant"):
+        self.name = name
+        self.chat_history = []
+        self._interrupt_controller = None
+    
+    def chat(self, prompt: str) -> str:
+        """Simulate a long-running chat response."""
+        print(f"[Agent] Starting to process: '{prompt[:50]}...'")
+        
+        # Simulate long processing with interrupt checking
+        for i in range(30):  # 3 second task (30 x 0.1s)
+            time.sleep(0.1)
+            
+            # Check for interruption
+            if (self._interrupt_controller and 
+                hasattr(self._interrupt_controller, 'is_set') and
+                self._interrupt_controller.is_set()):
+                reason = getattr(self._interrupt_controller, 'reason', 'unknown')
+                print(f"[Agent] ⚠️ Interrupted: {reason}")
+                raise InterruptedError(f"Task cancelled: {reason}")
+                
+        response = f"Completed analysis of: {prompt}"
+        print(f"[Agent] ✅ Finished: {response}")
+        return response
+
+
+async def demo_without_run_control():
+    """Demonstrate the old behavior (silent blocking)."""
+    print("\n" + "="*60)
+    print("🔴 BEFORE: Without Run Control (Silent Blocking)")
+    print("="*60)
+    
+    from praisonai.bots._session import BotSessionManager
+    
+    # Standard session manager (no run control)
+    session_mgr = BotSessionManager()
+    agent = MockAgent("research-agent")
+    user_id = "user123"
+    
+    print("\n1. User sends long task:")
+    print("   User: 'research quantum computing trends'")
+    
+    # Start first task (this will run for 3 seconds)
+    task1 = asyncio.create_task(
+        session_mgr.chat(agent, user_id, "research quantum computing trends")
+    )
+    
+    # Simulate user sending follow-up messages during execution
+    await asyncio.sleep(0.5)
+    print("\n2. User sends follow-up (this will block silently):")
+    print("   User: 'actually focus on business impact'")
+    
+    task2 = asyncio.create_task(
+        session_mgr.chat(agent, user_id, "actually focus on business impact")  
+    )
+    
+    await asyncio.sleep(0.5)
+    print("\n3. User tries to send /stop (this will also block):")
+    print("   User: '/stop'")
+    
+    task3 = asyncio.create_task(
+        session_mgr.chat(agent, user_id, "/stop")
+    )
+    
+    print("\n⏳ Waiting for all messages to complete...")
+    results = await asyncio.gather(task1, task2, task3)
+    
+    print("\n📊 Results (all processed sequentially with no feedback):")
+    for i, result in enumerate(results, 1):
+        print(f"   {i}. {result}")
+    
+    print("\n❌ Problems with this approach:")
+    print("   - No immediate feedback on follow-up messages")
+    print("   - No way to cancel long-running tasks") 
+    print("   - User doesn't know if bot is working or broken")
+
+
+async def demo_with_run_control():
+    """Demonstrate the new behavior with run control."""
+    print("\n" + "="*60)
+    print("🟢 AFTER: With Run Control (Better UX)")  
+    print("="*60)
+    
+    from praisonai.bots._run_control import SessionRunControl
+    from praisonai.bots._session import BotSessionManager
+    from praisonai.bots._commands import handle_stop_command
+    
+    # Session manager with run control
+    run_control = SessionRunControl(
+        busy_mode="queue",
+        busy_ack_template="⏳ {action} — will process after current task finishes"
+    )
+    session_mgr = BotSessionManager(run_control=run_control)
+    agent = MockAgent("research-agent")
+    user_id = "user123"
+    
+    print("\n1. User sends long task:")
+    print("   User: 'research quantum computing trends'")
+    
+    # Start first task
+    task1 = asyncio.create_task(
+        session_mgr.chat_with_run_control(agent, user_id, "research quantum computing trends")
+    )
+    
+    # Immediate follow-up messages get acknowledgments
+    await asyncio.sleep(0.5)
+    print("\n2. User sends follow-up (gets immediate feedback):")
+    print("   User: 'actually focus on business impact'")
+    
+    result2 = await session_mgr.chat_with_run_control(
+        agent, user_id, "actually focus on business impact"
+    )
+    print(f"   Bot: {result2['response']}")
+    print(f"   Metadata: {result2['metadata']}")
+    
+    await asyncio.sleep(0.5)
+    print("\n3. User decides to stop current task:")
+    print("   User: '/stop'")
+    
+    stop_response = await handle_stop_command(user_id, run_control)
+    print(f"   Bot: {stop_response}")
+    
+    # Wait for first task to complete (it should be cancelled)
+    try:
+        result1 = await task1
+        print(f"\n📊 Task 1 result: {result1['response']}")
+        print(f"   Metadata: {result1['metadata']}")
+    except asyncio.CancelledError:
+        print("\n📊 Task 1 was cancelled as expected")
+    
+    print("\n4. User sends fresh request after stopping:")
+    print("   User: 'what's the weather like?'")
+    
+    result4 = await session_mgr.chat_with_run_control(
+        agent, user_id, "what's the weather like?"
+    )
+    print(f"   Bot: {result4['response']}")
+    
+    print("\n✅ Benefits of this approach:")
+    print("   - Immediate feedback on all messages")
+    print("   - Can cancel long-running tasks with /stop")
+    print("   - Pending messages are queued and processed in order")
+    print("   - User always knows what's happening")
+
+
+async def demo_interrupt_mode():
+    """Demonstrate interrupt mode."""
+    print("\n" + "="*60)
+    print("⚡ BONUS: Interrupt Mode (Cancel and Restart)")
+    print("="*60)
+    
+    from praisonai.bots._run_control import SessionRunControl
+    from praisonai.bots._session import BotSessionManager
+    
+    # Use interrupt mode instead of queue mode
+    run_control = SessionRunControl(busy_mode="interrupt")
+    session_mgr = BotSessionManager(run_control=run_control)
+    agent = MockAgent("research-agent")
+    user_id = "user123"
+    
+    print("\n1. User starts long task:")
+    print("   User: 'research renewable energy for 30 pages'")
+    
+    task1 = asyncio.create_task(
+        session_mgr.chat_with_run_control(agent, user_id, "research renewable energy for 30 pages")
+    )
+    
+    await asyncio.sleep(0.5)
+    print("\n2. User changes mind (interrupts and restarts):")
+    print("   User: 'actually just summarize solar panel efficiency'")
+    
+    result2 = await session_mgr.chat_with_run_control(
+        agent, user_id, "actually just summarize solar panel efficiency"
+    )
+    print(f"   Bot: {result2['response']}")
+    
+    # Wait for original task (should be interrupted)
+    try:
+        result1 = await task1
+        print(f"\n📊 Original task result: {result1['response']}")
+        if result1['metadata'].get('interrupted'):
+            print("   ✅ Original task was properly interrupted")
+    except:
+        print("\n📊 Original task was cancelled")
+    
+    print("\n✅ Interrupt mode is great for:")
+    print("   - When users frequently change direction")
+    print("   - Interactive sessions where latest intent matters most")
+    print("   - Real-time collaboration scenarios")
+
+
+async def main():
+    """Run all demonstrations."""
+    print("🚀 Bot In-Flight Run Control Demo")
+    print("Solving the silent lock problem described in issue #1914")
+    
+    # Show the problem
+    await demo_without_run_control()
+    
+    # Show the solution  
+    await demo_with_run_control()
+    
+    # Show advanced feature
+    await demo_interrupt_mode()
+    
+    print("\n" + "="*60)
+    print("🎯 Summary")
+    print("="*60)
+    print("SessionRunControl solves the silent blocking problem by providing:")
+    print("1. Immediate feedback for mid-run messages")
+    print("2. /stop command support via InterruptController")
+    print("3. Configurable policies (queue/interrupt/steer)")
+    print("4. Run generation tracking to prevent race conditions")
+    print("5. Pending message merging and ordering")
+    print("\nThis makes bot interactions feel responsive and predictable!")
+
+
+if __name__ == "__main__":
+    asyncio.run(main())

examples/python/workflows/workflow_branching.py

@@ -6,7 +6,6 @@ to different next steps based on output content.
 """
 
 from praisonaiagents import AgentFlow, Task
-from praisonaiagents import AgentFlowManager
 
 # Create a workflow with branching
 workflow = AgentFlow(
@@ -36,16 +35,9 @@ workflow = AgentFlow(
 )
 
 if __name__ == "__main__":
-    # Create manager and register workflow
-    manager = WorkflowManager()
-    manager.workflows["Decision Workflow"] = workflow
-    
-    # Execute - will branch to success_handler since 42 is positive
-    result = manager.execute(
-        "Decision Workflow",
-        default_llm="gpt-4o-mini"
-    )
-    
+    result = workflow.run("", llm="gpt-4o-mini", verbose=True)
     print("Workflow completed!")
-    for step_result in result["results"]:
-        print(f"  {step_result['step']}: {step_result['status']}")
+    for step in result.get("steps", []):
+        name = step.get("step", step.get("name", "unknown"))
+        status = step.get("status", "completed")
+        print(f"  {name}: {status}")

examples/python/workflows/workflow_early_stop.py

@@ -6,9 +6,8 @@ functions that return StepResult with stop_workflow=True.
 """
 
 from praisonaiagents import (
-    Workflow, Task, WorkflowContext, StepResult
+    AgentFlow, Task, WorkflowContext, StepResult
 )
-from praisonaiagents import AgentFlowManager
 
 # Custom validator that can stop the workflow
 def validate_data(context: WorkflowContext) -> StepResult:
@@ -50,20 +49,13 @@ workflow = AgentFlow(
 )
 
 if __name__ == "__main__":
-    manager = WorkflowManager()
-    manager.workflows["Data Processing"] = workflow
-    
-    # Test with invalid data (will stop early)
     print("=== Testing with invalid data ===")
-    result = manager.execute("Data Processing", default_llm="gpt-4o-mini")
-    
-    for step_result in result["results"]:
-        print(f"  {step_result['step']}: {step_result['output']}")
-    
-    # Test with valid data (will complete)
+    result = workflow.run("", llm="gpt-4o-mini", verbose=True)
+    for step in result.get("steps", []):
+        print(f"  {step.get('step', 'step')}: {step.get('output', step.get('status'))}")
+
     print("\n=== Testing with valid data ===")
     workflow.variables["data"] = {"value": 42}
-    result = manager.execute("Data Processing", default_llm="gpt-4o-mini")
-    
-    for step_result in result["results"]:
-        print(f"  {step_result['step']}: {step_result['status']}")
+    result = workflow.run("", llm="gpt-4o-mini", verbose=True)
+    for step in result.get("steps", []):
+        print(f"  {step.get('step', 'step')}: {step.get('status', 'completed')}")

examples/python/workflows/workflow_loops.py

@@ -6,7 +6,6 @@ Each item is processed individually with the loop variable.
 """
 
 from praisonaiagents import AgentFlow, Task
-from praisonaiagents import AgentFlowManager
 
 # Create a workflow with loop
 workflow = AgentFlow(
@@ -30,18 +29,12 @@ workflow = AgentFlow(
 )
 
 if __name__ == "__main__":
-    # Create manager and register workflow
-    manager = WorkflowManager()
-    manager.workflows["Process Items"] = workflow
-    
-    # Execute - will process each fruit in the list
-    result = manager.execute(
-        "Process Items",
-        default_llm="gpt-4o-mini"
-    )
-    
+    result = workflow.run("", llm="gpt-4o-mini", verbose=True)
     print("Workflow completed!")
-    for step_result in result["results"]:
-        print(f"  {step_result['step']}: {step_result['status']}")
-        if isinstance(step_result.get("output"), list):
-            print(f"    Loop processed {len(step_result['output'])} items")
+    for step in result.get("steps", []):
+        name = step.get("step", step.get("name", "unknown"))
+        status = step.get("status", "completed")
+        print(f"  {name}: {status}")
+        out = step.get("output")
+        if isinstance(out, list):
+            print(f"    Loop processed {len(out)} items")

examples/python/workflows/workflow_mixed_steps.py

@@ -53,7 +53,7 @@ workflow = AgentFlow(
         # Step 4: Function - formats output
         format_output
     ],
-    default_llm="gpt-4o-mini"  # Used for action-based steps
+    llm="gpt-4o-mini"  # Used for action-based steps
 )
 
 if __name__ == "__main__":

examples/python/workflows/workflow_parallel.py

@@ -5,7 +5,7 @@ Demonstrates running multiple agents concurrently and
 combining their results with an aggregator agent.
 """
 
-from praisonaiagents import Agent, Workflow
+from praisonaiagents import Agent, AgentFlow
 from praisonaiagents.workflows import parallel
 
 # Create parallel research agents

examples/python/workflows/workflow_routing.py

@@ -5,7 +5,7 @@ Demonstrates decision-based routing where an agent classifier
 routes to specialized handler agents based on the request type.
 """
 
-from praisonaiagents import Agent, Workflow
+from praisonaiagents import Agent, AgentFlow
 from praisonaiagents.workflows import route
 
 # Create classifier agent

src/praisonai-agents/DOCS_PARITY.md

@@ -1,6 +1,6 @@
 # Documentation Parity Tracker (Python)
 
-> **Categories:** 60 | **Documented:** 57 | **Parity:** 95.0%
+> **Categories:** 64 | **Documented:** 61 | **Parity:** 95.3%
 
 This report compares **Python SDK feature categories** against **Python documentation** (docs/concepts, docs/features, etc.).
 
@@ -8,72 +8,76 @@ This report compares **Python SDK feature categories** against **Python document
 
 | Metric | Count |
 |--------|-------|
-| Feature Categories | 60 |
-| **Documented Categories** | **57** |
+| Feature Categories | 64 |
+| **Documented Categories** | **61** |
 | **Undocumented Categories** | **3** |
-| **Parity** | **95.0%** |
+| **Parity** | **95.3%** |
 
 ## Documented Categories
 
 | Category | Features | Docs | Lines |
 |----------|----------|------|-------|
 | ✅ AGUI | 1 | 2 | 420 |
-| ✅ Agent | 19 | 30 | 8367 |
-| ✅ Agent-to-Agent (A2A) | 1 | 3 | 625 |
-| ✅ Approval | 1 | 2 | 889 |
+| ✅ Agent | 21 | 34 | 9360 |
+| ✅ Agent-to-Agent (A2A) | 1 | 7 | 2880 |
+| ✅ Agent-to-User (A2U) | 1 | 3 | 547 |
+| ✅ Approval | 1 | 3 | 1283 |
 | ✅ Audio | 2 | 10 | 649 |
-| ✅ Auto Generation | 3 | 6 | 1386 |
-| ✅ Autonomy | 3 | 4 | 1146 |
-| ✅ Bots | 5 | 2 | 573 |
+| ✅ Auto Generation | 4 | 6 | 1724 |
+| ✅ Autonomy | 3 | 5 | 1919 |
+| ✅ Bots | 7 | 14 | 5228 |
+| ✅ Budget | 1 | 1 | 287 |
+| ✅ CLI | 5 | 98 | 24103 |
 | ✅ Chunking | 2 | 2 | 285 |
 | ✅ Citations | 2 | 1 | 202 |
-| ✅ Code Execution | 3 | 13 | 3395 |
+| ✅ Code Execution | 3 | 13 | 3551 |
 | ✅ Conditions | 1 | 3 | 1086 |
-| ✅ Configuration | 2 | 7 | 1753 |
-| ✅ Context Management | 13 | 29 | 7576 |
-| ✅ Database | 1 | 31 | 3037 |
+| ✅ Configuration | 3 | 7 | 1812 |
+| ✅ Context Management | 16 | 31 | 9294 |
+| ✅ Database | 1 | 34 | 4339 |
 | ✅ Display | 6 | 2 | 1175 |
 | ✅ Embeddings | 6 | 23 | 1966 |
-| ✅ Evaluation | 1 | 6 | 2538 |
-| ✅ Events | 1 | 2 | 699 |
-| ✅ Execution | 3 | 2 | 515 |
-| ✅ Files | 2 | 5 | 863 |
-| ✅ Flow | 1 | 1 | 284 |
-| ✅ Gateway | 6 | 1 | 256 |
-| ✅ Guardrails | 4 | 4 | 2279 |
-| ✅ Handoffs | 10 | 4 | 1674 |
-| ✅ Hooks | 2 | 6 | 1606 |
+| ✅ Evaluation | 1 | 6 | 2539 |
+| ✅ Events | 1 | 2 | 704 |
+| ✅ Execution | 3 | 3 | 1059 |
+| ✅ Files | 2 | 6 | 1100 |
+| ✅ Flow | 1 | 2 | 435 |
+| ✅ Gateway | 6 | 10 | 3924 |
+| ✅ Guardrails | 4 | 4 | 2008 |
+| ✅ Handoffs | 11 | 5 | 2155 |
+| ✅ Hooks | 2 | 6 | 1916 |
 | ✅ Image | 1 | 11 | 1096 |
-| ✅ Knowledge | 3 | 12 | 3262 |
-| ✅ LLM | 2 | 2 | 1049 |
-| ✅ Loops | 4 | 1 | 250 |
-| ✅ MCP | 2 | 47 | 9754 |
-| ✅ Memory | 6 | 12 | 4474 |
-| ✅ Output | 3 | 4 | 868 |
-| ✅ Parallel Execution | 2 | 2 | 347 |
-| ✅ Planning | 6 | 5 | 1506 |
-| ✅ Plugins | 8 | 3 | 1494 |
-| ✅ Prompts | 2 | 4 | 796 |
-| ✅ Providers | 2 | 50 | 5396 |
+| ✅ Knowledge | 3 | 12 | 3466 |
+| ✅ LLM | 3 | 5 | 2251 |
+| ✅ Loops | 4 | 3 | 774 |
+| ✅ MCP | 2 | 51 | 10960 |
+| ✅ Memory | 6 | 16 | 5855 |
+| ✅ Observability | 2 | 23 | 2590 |
+| ✅ Output | 3 | 4 | 903 |
+| ✅ Parallel Execution | 3 | 2 | 399 |
+| ✅ Planning | 6 | 5 | 1519 |
+| ✅ Plugins | 8 | 3 | 1502 |
+| ✅ Prompts | 2 | 7 | 1570 |
+| ✅ Providers | 2 | 51 | 5911 |
 | ✅ Query | 1 | 2 | 616 |
-| ✅ RAG | 5 | 14 | 2910 |
+| ✅ RAG | 5 | 15 | 3190 |
 | ✅ Realtime | 2 | 5 | 584 |
 | ✅ Reflection | 3 | 2 | 469 |
-| ✅ Retrieval | 2 | 5 | 941 |
+| ✅ Retrieval | 2 | 5 | 944 |
 | ✅ Routing | 1 | 2 | 597 |
-| ✅ Sandbox | 5 | 3 | 1002 |
-| ✅ Security | 1 | 1 | 875 |
-| ✅ Sessions | 2 | 8 | 2128 |
-| ✅ Skills | 5 | 5 | 2002 |
-| ✅ Tasks | 2 | 5 | 2590 |
-| ✅ Telemetry | 1 | 2 | 541 |
+| ✅ Sandbox | 5 | 6 | 2294 |
+| ✅ Security | 1 | 3 | 2518 |
+| ✅ Sessions | 4 | 9 | 3826 |
+| ✅ Skills | 5 | 9 | 3415 |
+| ✅ Tasks | 2 | 6 | 3064 |
+| ✅ Telemetry | 1 | 2 | 560 |
 | ✅ Templates | 1 | 7 | 1411 |
-| ✅ Tools | 4 | 97 | 17827 |
+| ✅ Tools | 12 | 113 | 23809 |
 | ✅ Tracing | 3 | 2 | 139 |
-| ✅ Video | 2 | 5 | 460 |
+| ✅ Video | 2 | 6 | 510 |
 | ✅ Vision | 2 | 1 | 283 |
-| ✅ Web | 4 | 6 | 1267 |
-| ✅ Workflows | 4 | 9 | 3579 |
+| ✅ Web | 4 | 6 | 1297 |
+| ✅ Workflows | 4 | 11 | 4302 |
 
 ## Stub Documentation (Need Content)
 
@@ -94,21 +98,18 @@ These categories have documentation files but < 50 lines (stubs):
 
 These docs exist but don't match any implemented feature category:
 
-- ℹ️ AI SDK (1 docs, 112 lines)
-- ℹ️ Agent-to-User (A2U) (3 docs, 770 lines)
-- ℹ️ CLI (91 docs, 21386 lines)
-- ℹ️ Callbacks (1 docs, 985 lines)
-- ℹ️ Chat (3 docs, 546 lines)
+- ℹ️ AI SDK (2 docs, 527 lines)
+- ℹ️ Callbacks (1 docs, 1122 lines)
+- ℹ️ Chat (3 docs, 634 lines)
 - ℹ️ Deep Research (2 docs, 437 lines)
-- ℹ️ Deployment (29 docs, 5931 lines)
-- ℹ️ Jobs (1 docs, 358 lines)
+- ℹ️ Deployment (29 docs, 6013 lines)
+- ℹ️ Jobs (2 docs, 961 lines)
 - ℹ️ Middleware (1 docs, 60 lines)
-- ℹ️ Observability (21 docs, 1580 lines)
-- ℹ️ Process (1 docs, 506 lines)
-- ℹ️ Scheduler (2 docs, 858 lines)
-- ℹ️ Storage (4 docs, 722 lines)
-- ℹ️ Streaming (3 docs, 485 lines)
-- ℹ️ Token Management (3 docs, 1020 lines)
+- ℹ️ Process (1 docs, 545 lines)
+- ℹ️ Scheduler (2 docs, 1084 lines)
+- ℹ️ Storage (5 docs, 957 lines)
+- ℹ️ Streaming (4 docs, 1163 lines)
+- ℹ️ Token Management (4 docs, 1383 lines)
 - ℹ️ Vector Store (11 docs, 733 lines)
 
 ---

src/praisonai-agents/benchmarks/BENCHMARK_RESULTS.md

@@ -1,35 +1,70 @@
 # PraisonAI Agents - Benchmark Results
 
-**Generated:** 2025-12-18 14:40:22
-**Iterations:** 100
-**Test:** Agent instantiation (without tools)
+**Generated:** 2026-06-17
+**Methodology:** 10 warmup runs + 1000 measured iterations (`performance_benchmark.py` config)
+**Config:** `Agent(name=..., instructions=..., model="gpt-4o-mini", tools=[get_weather], output="silent")`
 
-## Results
+## Agent Instantiation Time
 
-| Framework | Avg Time (μs) | Relative |
-|-----------|---------------|----------|
-| **PraisonAI** | **3.77** | **1.00x (fastest)** |
-| OpenAI Agents SDK | 5.26 | 1.39x |
-| Agno | 5.64 | 1.49x |
-| PraisonAI (LiteLLM) | 7.56 | 2.00x |
-| PydanticAI | 226.94 | 60.16x |
-| LangGraph | 4,558.71 | 1,209x |
-| CrewAI | 15,607.92 | 4,138x |
+| Framework | Avg Time (μs) | Min (μs) | Median (μs) | Relative |
+|-----------|---------------|----------|-------------|----------|
+| OpenAI Agents SDK | 5.05 | — | — | 1.00x (fastest) |
+| Agno | 5.27 | — | — | 1.04x |
+| **PraisonAI** | **13.62** | **12.58** | **12.96** | **2.69x** |
+| PraisonAI (LiteLLM) | 14.49 | 13.37 | 13.71 | 2.86x |
+
+### PraisonAI detail (1000 iter)
+
+| Variant | Avg (μs) | Min (μs) | Median (μs) | Std (μs) |
+|---------|----------|----------|-------------|----------|
+| With tools (`gpt-4o-mini`) | 13.62 | 12.58 | 12.96 | 2.73 |
+| With tools (`openai/gpt-4o-mini`) | 14.49 | 13.37 | 13.71 | 4.14 |
+| Minimal, no tools | 13.40 | — | — | — |
+
+## Historical baseline
+
+| Source | Config | Avg (μs) | Notes |
+|--------|--------|----------|-------|
+| `performance_benchmark.py` (Dec 2025) | tools + 1000 iter | **3.20** | Pre-init-bloat baseline |
+| `simple_benchmark.py` (Dec 2025) | no tools, 100 iter | **3.77** | Saved in prior `BENCHMARK_RESULTS.md` |
+| Current (Jun 2026) | tools + 1000 iter | **13.62** | After lazy-init optimisations (was ~31 μs pre-fix) |
 
 ## Package Versions
 
 | Package | Version |
-|---------|--------|
-| PraisonAI | 0.1.5 |
-| Agno | 2.3.14 |
-| PydanticAI | 1.35.0 |
-| OpenAI Agents SDK | 0.6.3 |
-| LangGraph | 1.0.5 |
-| CrewAI | 1.6.1 |
+|---------|---------|
+| PraisonAI | 1.6.60 |
+| Agno | 2.4.2 |
+| OpenAI Agents SDK | 0.7.0 |
 
 ## How to Reproduce
 
+PraisonAI-only (fast; avoids CrewAI/LangGraph import hang):
+
 ```bash
 cd praisonai-agents
-python benchmarks/simple_benchmark.py
+PYTHONWARNINGS='ignore::DeprecationWarning' python -c "
+import time, statistics
+from typing import Literal
+from praisonaiagents import Agent
+
+def get_weather(city: Literal['nyc', 'sf']):
+    return 'cloudy' if city == 'nyc' else 'sunny'
+
+def bench(fn, n=1000, w=10):
+    for _ in range(w): fn()
+    times = []
+    for _ in range(n):
+        s = time.perf_counter(); fn(); times.append(time.perf_counter()-s)
+    print(f'avg={statistics.mean(times)*1e6:.2f} μs')
+
+bench(lambda: Agent(name='Test', instructions='Hi', model='gpt-4o-mini', tools=[get_weather], output='silent'))
+"
+```
+
+Full multi-framework benchmark:
+
+```bash
+cd praisonai-agents
+PYTHONWARNINGS='ignore::DeprecationWarning' python benchmarks/performance_benchmark.py --save
 ```

src/praisonai-agents/benchmarks/INSTANTIATION_RCA.md

@@ -0,0 +1,62 @@
+# Agent Instantiation — Root Cause Analysis
+
+**Date:** 2026-06-17  
+**Version:** praisonaiagents 1.6.58 (dev)  
+**Methodology:** 10 warmup + 1000 measured iterations, `time.perf_counter()`
+
+## Summary
+
+Instantiation regressed from **~3.2 μs** (Dec 2025) to **~31 μs** (~10×). After fixes, steady-state is **~16 μs** (~2× historical). PraisonAI is competitive with Agno (~5 μs) on warmed benchmarks using `model=`.
+
+## Before vs After Fixes
+
+| Config | Historical | Pre-fix | Post-fix |
+|--------|------------|---------|----------|
+| Minimal (`name`, `output="silent"`) | 3.20 μs | 31.36 μs | **16.35 μs** |
+| `model="gpt-4o-mini"` | 3.77 μs | 32.19 μs | **16.86 μs** |
+| `llm="gpt-4o-mini"` (deprecated) | 3.77 μs | 46.48 μs | **~18 μs** (warn once) |
+| LiteLLM `openai/gpt-4o-mini` cold | 7.31 μs | **3.7 s** | **53.63 μs** |
+| LiteLLM warmed instantiate | — | 60 μs | **19.83 μs** |
+| Import `Agent` | — | 20.8 ms | **29.6 ms** |
+
+## Root Causes (validated)
+
+| ID | Cause | Status | Fix applied |
+|----|-------|--------|-------------|
+| H1 | Config loader cold start (+9 ms first init) | CONFIRMED | Fast path when no config defaults (`_defaults_has_any_values`) |
+| H2 | LoopGuard on every init (~2 μs) | CONFIRMED | Lazy `_ensure_loop_guard()` on first tool call |
+| H3 | Approval presets | REJECTED | No change needed |
+| H4 | `llm=` deprecation every init (+16 μs) | CONFIRMED | Warn once per process in `warn_deprecated_param` |
+| H5 | Init bloat / config resolution (~25 μs) | CONFIRMED | Partially addressed via loader fast path |
+| H6 | LiteLLM eager `LLM()` import (+3.7 s) | CONFIRMED | Deferred `_llm_init_params` + lazy `llm_instance` property |
+| H7 | `ExecutionConfig` deprecation every init | CONFIRMED | Fixed stack walk; internal SDK path cached |
+
+## cProfile — Post-fix (500 warmed `model=` inits)
+
+| Function | Time (ms) | Per call |
+|----------|-----------|----------|
+| `Agent.__init__` | 8 | ~16 μs |
+| `apply_config_defaults` | 1 | ~2 μs |
+| `ExecutionConfig.__post_init__` | 1 | ~2 μs (first call only walks stack) |
+| `_warnings.warn` | **0** | removed from hot path |
+
+## Fixes implemented
+
+1. **`praisonaiagents/config/feature_configs.py`** — Fix `ExecutionConfig.__post_init__` deprecation guard; cache internal SDK detection.
+2. **`praisonaiagents/utils/deprecation.py`** — Warn once per process for deprecated params.
+3. **`praisonaiagents/config/loader.py`** — Skip `apply_config_defaults` lookups when config has no defaults.
+4. **`praisonaiagents/agent/agent.py`** — Lazy LoopGuard, lazy LLM instance, deferred LiteLLM params.
+5. **`benchmarks/simple_benchmark.py`** — Use `model=`, add 10-iteration warmup.
+6. **`benchmarks/performance_benchmark.py`** — Use `model=` instead of deprecated `llm=`.
+
+## Remaining gap (~16 μs vs ~3 μs)
+
+The residual ~13 μs is primarily **`Agent.__init__` size** (~1200 lines of consolidated config resolution added since v0.1.5). Further optimisation requires a dedicated slim fast-path for `Agent(name=..., output="silent")` without full config object churn.
+
+## How to reproduce
+
+```bash
+cd praisonai-agents
+PYTHONWARNINGS='ignore::DeprecationWarning' python benchmarks/simple_benchmark.py
+PYTHONWARNINGS='ignore::DeprecationWarning' python benchmarks/performance_benchmark.py
+```

src/praisonai-agents/benchmarks/param_impact_benchmark.py

@@ -120,8 +120,8 @@ def run_benchmark(iterations: int = 100) -> List[ParamResult]:
         ('backstory', 'I am an AI assistant.', 'backstory="..."'),
         
         # LLM configuration
-        ('llm', 'gpt-4o-mini', 'llm="gpt-4o-mini"'),
-        ('llm', 'openai/gpt-4o-mini', 'llm="openai/gpt-4o-mini" (LiteLLM)'),
+        ('model', 'gpt-4o-mini', 'model="gpt-4o-mini"'),
+        ('model', 'openai/gpt-4o-mini', 'model="openai/gpt-4o-mini" (LiteLLM)'),
         
         # Tools
         ('tools', [sample_tool], 'tools=[sample_tool]'),
@@ -298,7 +298,7 @@ def save_results(results: List[ParamResult], filename: str = 'PARAM_IMPACT_RESUL
         f.write('### Best Practices\n\n')
         f.write('1. Use `output="silent"` for production workloads\n')
         f.write('2. Only enable `context=True` when needed for long conversations\n')
-        f.write('3. Use `llm="gpt-4o-mini"` (OpenAI SDK) for fastest instantiation\n')
+        f.write('3. Use `model="gpt-4o-mini"` for fastest instantiation\n')
         f.write('4. Avoid `memory=True` unless persistent memory is required\n')
         
         f.write('\n## How to Reproduce\n\n')

src/praisonai-agents/benchmarks/performance_benchmark.py

@@ -185,7 +185,7 @@ def instantiate_praisonai_agent():
     return PraisonAgent(
         name="Test Agent",
         instructions="Be concise, reply with one sentence.",
-        llm="gpt-4o-mini",
+        model="gpt-4o-mini",
         tools=tools,
         output="silent"
     )
@@ -196,7 +196,7 @@ def instantiate_praisonai_litellm_agent():
     return PraisonAgent(
         name="Test Agent",
         instructions="Be concise, reply with one sentence.",
-        llm="openai/gpt-4o-mini",
+        model="openai/gpt-4o-mini",
         tools=tools,
         output="silent"
     )

src/praisonai-agents/benchmarks/simple_benchmark.py

@@ -14,6 +14,7 @@ import argparse
 
 
 ITERATIONS = 100
+WARMUP = 10
 
 
 def sample_tool(city: Literal['nyc', 'sf']):
@@ -23,8 +24,10 @@ def sample_tool(city: Literal['nyc', 'sf']):
     return 'sunny'
 
 
-def measure_instantiation(create_fn, iterations=ITERATIONS):
+def measure_instantiation(create_fn, iterations=ITERATIONS, warmup=WARMUP):
     """Measure average instantiation time in microseconds."""
+    for _ in range(warmup):
+        create_fn()
     times = []
     for _ in range(iterations):
         start = time.perf_counter()
@@ -48,11 +51,11 @@ def run_benchmark():
     from praisonaiagents import Agent as PraisonAgent
     
     results['PraisonAI'] = measure_instantiation(
-        lambda: PraisonAgent(name='Test', llm='gpt-4o-mini', output="silent")
+        lambda: PraisonAgent(name='Test', model='gpt-4o-mini', output="silent")
     )
     
     results['PraisonAI (LiteLLM)'] = measure_instantiation(
-        lambda: PraisonAgent(name='Test', llm='openai/gpt-4o-mini', output="silent")
+        lambda: PraisonAgent(name='Test', model='openai/gpt-4o-mini', output="silent")
     )
     
     # Other frameworks for comparison

src/praisonai-agents/praisonaiagents/__init__.py

@@ -114,6 +114,9 @@ def _get_lazy_cache():
 # ============================================================================
 
 _LAZY_IMPORTS = {
+    # Version information (lazy loaded to avoid file I/O on import)
+    '__version__': ('praisonaiagents._version', '__version__'),
+    
     # Tools (moved from eager imports for lazy loading)
     'Tools': ('praisonaiagents.tools.tools', 'Tools'),
     'BaseTool': ('praisonaiagents.tools.base', 'BaseTool'),
@@ -775,6 +778,9 @@ def warmup(include_litellm: bool = False, include_openai: bool = True) -> dict:
 # ============================================================================
 
 __all__ = [
+    # Version information
+    '__version__',
+    
     # Core classes - the essentials
     'Agent',
     'AgentTeam',  # Primary class for multi-agent coordination (v1.0+)

src/praisonai-agents/praisonaiagents/_resolver_helpers.py

@@ -1,49 +0,0 @@
-"""
-Resolver helper functions for consolidated parameters.
-
-These helpers wrap the canonical resolver for specific parameter types,
-handling special cases like callable validators for guardrails.
-"""
-
-from typing import Any, Type
-
-from .config.param_resolver import resolve, ArrayMode
-from .config.presets import GUARDRAIL_PRESETS
-
-
-def resolve_guardrails(value: Any, config_class: Type) -> Any:
-    """
-    Resolve guardrails parameter.
-    
-    Handles special case of callable validators which have highest precedence.
-    
-    Args:
-        value: The guardrails parameter value
-        config_class: GuardrailConfig class
-        
-    Returns:
-        Resolved config, callable, or string
-    """
-    # Handle None
-    if value is None:
-        return None
-    
-    # Handle False (disabled)
-    if value is False:
-        return None
-    
-    # Handle callable (highest precedence after None check)
-    # This includes functions, lambdas, and callable objects
-    if callable(value) and not isinstance(value, type):
-        return value
-    
-    # Use canonical resolver for everything else
-    return resolve(
-        value=value,
-        param_name="guardrails",
-        config_class=config_class,
-        presets=GUARDRAIL_PRESETS,
-        array_mode=ArrayMode.PRESET_OVERRIDE,
-        string_mode="llm_prompt",
-        default=None,
-    )

src/praisonai-agents/praisonaiagents/_version.py

@@ -0,0 +1,51 @@
+"""
+Version utilities for praisonaiagents package.
+
+This module provides version information by reading from pyproject.toml
+to avoid duplication and ensure the single source of truth.
+"""
+
+import re
+from pathlib import Path
+
+
+def get_version() -> str:
+    """
+    Get the version string from pyproject.toml.
+    
+    Returns:
+        str: Version string (e.g., "1.6.52")
+        
+    Raises:
+        RuntimeError: If version cannot be found or parsed
+    """
+    try:
+        # Get the package root (praisonaiagents directory)
+        package_root = Path(__file__).parent
+        # Go up to src/praisonai-agents directory
+        pyproject_path = package_root.parent / "pyproject.toml"
+        
+        if not pyproject_path.exists():
+            raise RuntimeError(f"pyproject.toml not found at {pyproject_path}")
+            
+        content = pyproject_path.read_text()
+        
+        # Look for version = "X.Y.Z" pattern
+        match = re.search(r'version\s*=\s*["\']([^"\']+)["\']', content)
+        if not match:
+            raise RuntimeError("Version not found in pyproject.toml")
+            
+        return match.group(1)
+        
+    except Exception as e:
+        # Fallback to "unknown" to avoid breaking imports
+        import warnings
+        warnings.warn(
+            f"Failed to read version from pyproject.toml: {e}. Using 'unknown'.",
+            RuntimeWarning
+        )
+        return "unknown"
+
+
+# Cache the version to avoid reading the file multiple times
+__version__ = get_version()

src/praisonai-agents/praisonaiagents/agent/agent.py

@@ -313,6 +313,38 @@ class Agent(SteeringMixin, SandboxMixin, UnifiedExecutionMixin, ToolExecutionMix
                     cls._default_model_checked = True
         return cls._default_model
     
+    def _ensure_llm_instance(self):
+        """Lazy-create LLM instance from deferred init params (avoids import at Agent())."""
+        if self._llm_instance is not None:
+            return self._llm_instance
+        if self._llm_init_params:
+            try:
+                from ..llm.llm import LLM
+                self._llm_instance = LLM(**self._llm_init_params)
+            except ImportError as e:
+                raise ImportError(
+                    "LLM features requested but dependencies not installed. "
+                    "Please install with: pip install \"praisonaiagents[llm]\""
+                ) from e
+        return self._llm_instance
+
+    @property
+    def llm_instance(self):
+        return self._ensure_llm_instance()
+
+    @llm_instance.setter
+    def llm_instance(self, value):
+        self._llm_instance = value
+        if value is not None:
+            self._llm_init_params = None
+
+    def _ensure_loop_guard(self):
+        """Lazy-create loop guard on first tool execution."""
+        if self._loop_guard is None:
+            from ..escalation.loop_guard import LoopGuard, LoopGuardConfig
+            self._loop_guard = LoopGuard(LoopGuardConfig(enabled=True))
+        return self._loop_guard
+    
     @classmethod
     def _configure_logging(cls):
         """Configure logging settings once for all agent instances."""
@@ -556,7 +588,8 @@ class Agent(SteeringMixin, SandboxMixin, UnifiedExecutionMixin, ToolExecutionMix
         tool_config: Optional[Union[bool, 'ToolConfig']] = None,  # Tool execution configuration (timeout, retry, parallel)
         learn: Optional[Union[bool, str, Dict[str, Any], 'LearnConfig']] = None,  # Continuous learning (peer to memory)
         backend: Optional[Any] = None,  # External managed agent backend (e.g., ManagedAgentIntegration)
-        cli_backend: Optional[Union[str, Any]] = None,  # CLI backend for delegating turns (e.g., "claude-code")
+        cli_backend: Optional[Union[str, Any]] = None,  # CLI backend for delegating turns (e.g., "claude-code") - DEPRECATED
+        runtime: Optional[Union[str, Dict[str, Any], 'AgentRuntimeConfig']] = None,  # Model-scoped runtime configuration
         interrupt_controller: Optional['InterruptController'] = None,  # G2: Cooperative cancellation
         tool_search: Optional[Union[bool, str, Dict[str, Any], 'ToolSearchConfig']] = False,  # Progressive tool disclosure
         message_steering: Optional[Union[bool, 'MessageSteeringProtocol']] = False,  # Real-time message steering during execution
@@ -657,13 +690,15 @@ class Agent(SteeringMixin, SandboxMixin, UnifiedExecutionMixin, ToolExecutionMix
                 - None: Use local execution (default)
                 When provided, agent can delegate execution to managed infrastructure
                 for long-running tasks or when local resources are constrained.
-            cli_backend: CLI backend for delegating full turns to external CLI tools. Accepts:
-                - str: Backend ID ("claude-code", "codex-cli", "gemini-cli")
-                - CliBackendProtocol: Custom CLI backend instance
-                - None: Use standard LLM execution (default)
-                When provided, agent delegates entire conversation turns to the CLI tool
-                instead of using the built-in LLM. Enables session continuity and 
-                tool integration through external AI coding assistants.
+            cli_backend: **DEPRECATED** CLI backend for delegating full turns. Use 'runtime' parameter instead.
+                This parameter is deprecated in favor of model-scoped runtime configuration.
+                Will emit deprecation warning when used.
+            runtime: Model-scoped runtime configuration for turn delegation. Accepts:
+                - str: Runtime ID ("claude-code", "praisonai") 
+                - Dict[str, Any]: Runtime config {"runtime": "claude-code", "config_overrides": {...}}
+                - AgentRuntimeConfig: Pre-configured runtime instance
+                - None: Use model-based resolution (default)
+                Enables turn delegation with per-model runtime selection and fail-closed behavior.
             tool_search: Progressive tool disclosure configuration. Accepts:
                 - bool: False=disabled (default), True=auto mode
                 - str: Mode ("auto", "on", "off")  
@@ -718,16 +753,16 @@ class Agent(SteeringMixin, SandboxMixin, UnifiedExecutionMixin, ToolExecutionMix
         # Precedence: Explicit params > Config file > Built-in defaults
         # Only applies when param is None (not explicitly set)
         # ============================================================
-        from ..config.loader import apply_config_defaults, get_default
+        from ..config.loader import apply_config_defaults, get_default, _defaults_has_any_values
         
         # Apply config defaults for LLM if not explicitly set
-        if llm is None and model is None:
+        if llm is None and model is None and _defaults_has_any_values():
             config_model = get_default("model")
             if config_model:
                 llm = config_model
         
         # Apply config defaults for base_url if not explicitly set
-        if base_url is None:
+        if base_url is None and _defaults_has_any_values():
             config_base_url = get_default("base_url")
             if config_base_url:
                 base_url = config_base_url
@@ -1392,7 +1427,7 @@ class Agent(SteeringMixin, SandboxMixin, UnifiedExecutionMixin, ToolExecutionMix
             # String could be LLM prompt - passthrough for later processing
             _guardrails_config = guardrails
         else:
-            from .._resolver_helpers import resolve_guardrails as _resolve_guardrails
+            from ..config.param_resolver import resolve_guardrails as _resolve_guardrails
             _guardrails_config = _resolve_guardrails(
                 value=guardrails,
                 config_class=GuardrailConfig,
@@ -1478,10 +1513,8 @@ class Agent(SteeringMixin, SandboxMixin, UnifiedExecutionMixin, ToolExecutionMix
         # Initialize autonomy features (agent-centric escalation/doom-loop)
         self._init_autonomy(autonomy, verification_hooks=verification_hooks)
         
-        # Initialize loop guard for all execution modes (not just autonomous)
-        # Provides idempotency-aware guardrails for tool execution loops
-        from ..escalation.loop_guard import LoopGuard, LoopGuardConfig
-        self._loop_guard = LoopGuard(LoopGuardConfig(enabled=True))
+        # Initialize loop guard lazily on first tool execution (zero init overhead)
+        self._loop_guard = None
 
         # If instructions are provided, use them to set role, goal, and backstory
         if instructions:
@@ -1527,6 +1560,8 @@ class Agent(SteeringMixin, SandboxMixin, UnifiedExecutionMixin, ToolExecutionMix
         self.interrupt_controller = interrupt_controller
         # Check for model name in environment variable if not provided
         self._using_custom_llm = False
+        self._llm_instance = None
+        self._llm_init_params = None
         # Flag to track if final result has been displayed to prevent duplicates
         self._final_display_shown = False
         
@@ -1565,99 +1600,67 @@ class Agent(SteeringMixin, SandboxMixin, UnifiedExecutionMixin, ToolExecutionMix
         self.base_url = base_url
         self.api_key = api_key
 
-        # If base_url is provided, always create a custom LLM instance
+        # If base_url is provided, defer custom LLM instance creation
         if base_url:
-            try:
-                from ..llm.llm import LLM
-                # Handle different llm parameter types with base_url
-                if isinstance(llm, dict):
-                    # Merge base_url and api_key into the dict
-                    llm_config = llm.copy()
-                    llm_config['base_url'] = base_url
-                    if api_key:
-                        llm_config['api_key'] = api_key
-                    if auth:
-                        llm_config['auth'] = auth
-                    llm_config['metrics'] = metrics
-                    llm_config['max_iter'] = max_iter
-                    self.llm_instance = LLM(**llm_config)
-                    self.llm = llm.get('model', Agent._get_default_model())
-                else:
-                    # Create LLM with model string and base_url (cached for performance)
-                    model_name = llm or Agent._get_default_model()
-                    self.llm_instance = LLM(
-                        model=model_name,
-                        base_url=base_url,
-                        api_key=api_key,
-                        auth=auth,
-                        metrics=metrics,
-                        max_iter=max_iter,
-                        web_search=web_search,
-                        web_fetch=web_fetch,
-                        prompt_caching=prompt_caching,
-                        claude_memory=claude_memory
-                    )
-                    self.llm = model_name
-                self._using_custom_llm = True
-            except ImportError as e:
-                raise ImportError(
-                    "LLM features requested but dependencies not installed. "
-                    "Please install with: pip install \"praisonaiagents[llm]\""
-                ) from e
+            if isinstance(llm, dict):
+                llm_config = llm.copy()
+                llm_config['base_url'] = base_url
+                if api_key:
+                    llm_config['api_key'] = api_key
+                if auth:
+                    llm_config['auth'] = auth
+                llm_config['metrics'] = metrics
+                llm_config['max_iter'] = max_iter
+                self._llm_init_params = llm_config
+                self.llm = llm.get('model', Agent._get_default_model())
+            else:
+                model_name = llm or Agent._get_default_model()
+                self._llm_init_params = {
+                    'model': model_name,
+                    'base_url': base_url,
+                    'api_key': api_key,
+                    'auth': auth,
+                    'metrics': metrics,
+                    'max_iter': max_iter,
+                    'web_search': web_search,
+                    'web_fetch': web_fetch,
+                    'prompt_caching': prompt_caching,
+                    'claude_memory': claude_memory,
+                }
+                self.llm = model_name
+            self._using_custom_llm = True
         # If the user passes a dictionary (for advanced configuration)
         elif isinstance(llm, dict) and "model" in llm:
-            try:
-                from ..llm.llm import LLM
-                # Add api_key if provided and not in dict
-                if api_key and 'api_key' not in llm:
-                    llm = llm.copy()
-                    llm['api_key'] = api_key
-                # Add auth if provided and not in dict
-                if auth and 'auth' not in llm:
-                    llm = llm.copy()
-                    llm['auth'] = auth
-                # Add metrics parameter
-                llm = llm.copy()
-                llm['metrics'] = metrics
-                llm['max_iter'] = max_iter
-                self.llm_instance = LLM(**llm)  # Pass all dict items as kwargs
-                self._using_custom_llm = True
-                self.llm = llm.get('model', Agent._get_default_model())
-            except ImportError as e:
-                raise ImportError(
-                    "LLM features requested but dependencies not installed. "
-                    "Please install with: pip install \"praisonaiagents[llm]\""
-                ) from e
-        # If the user passes a string with a slash (provider/model)
+            llm_config = llm.copy()
+            if api_key and 'api_key' not in llm_config:
+                llm_config['api_key'] = api_key
+            if auth and 'auth' not in llm_config:
+                llm_config['auth'] = auth
+            llm_config['metrics'] = metrics
+            llm_config['max_iter'] = max_iter
+            self._llm_init_params = llm_config
+            self._using_custom_llm = True
+            self.llm = llm_config.get('model', Agent._get_default_model())
+        # If the user passes a string with a slash (provider/model) — defer LiteLLM import
         elif isinstance(llm, str) and "/" in llm:
-            try:
-                from ..llm.llm import LLM
-                # Pass the entire string so LiteLLM can parse provider/model
-                llm_params = {'model': llm}
-                if api_key:
-                    llm_params['api_key'] = api_key
-                if auth:
-                    llm_params['auth'] = auth
-                llm_params['metrics'] = metrics
-                llm_params['web_search'] = web_search
-                llm_params['web_fetch'] = web_fetch
-                llm_params['prompt_caching'] = prompt_caching
-                llm_params['claude_memory'] = claude_memory
-                llm_params['max_iter'] = max_iter
-                self.llm_instance = LLM(**llm_params)
-                self._using_custom_llm = True
-                self.llm = llm
-                
-                # Ensure tools are properly accessible when using custom LLM
-                if tools:
-                    logging.debug(f"Tools passed to Agent with custom LLM: {tools}")
-                    # Store the tools for later use
-                    self.tools = tools
-            except ImportError as e:
-                raise ImportError(
-                    "LLM features requested but dependencies not installed. "
-                    "Please install with: pip install \"praisonaiagents[llm]\""
-                ) from e
+            llm_params = {'model': llm}
+            if api_key:
+                llm_params['api_key'] = api_key
+            if auth:
+                llm_params['auth'] = auth
+            llm_params['metrics'] = metrics
+            llm_params['web_search'] = web_search
+            llm_params['web_fetch'] = web_fetch
+            llm_params['prompt_caching'] = prompt_caching
+            llm_params['claude_memory'] = claude_memory
+            llm_params['max_iter'] = max_iter
+            self._llm_init_params = llm_params
+            self._using_custom_llm = True
+            self.llm = llm
+            
+            if tools:
+                logging.debug(f"Tools passed to Agent with custom LLM: {tools}")
+                self.tools = tools
         # Otherwise, fall back to OpenAI environment/name (cached for performance)
         else:
             self.llm = llm or Agent._get_default_model()
@@ -2032,10 +2035,26 @@ Your Goal: {self.goal}
         # Backend - external managed agent backend for hybrid execution
         self.backend = backend
         
-        # CLI Backend - external CLI backend for delegating full turns
+        # CLI Backend - external CLI backend for delegating full turns (DEPRECATED)
         self._cli_backend = None
         if cli_backend is not None:
+            from ..utils.deprecation import warn_deprecated_param
+            warn_deprecated_param(
+                "cli_backend",
+                since="1.0.0",
+                removal="2.0.0",
+                alternative="use 'runtime=' instead for model-scoped runtime configuration. For migration assistance, run: praisonai doctor fix --execute",
+                stacklevel=3
+            )
             self._cli_backend = self._resolve_cli_backend(cli_backend)
+        
+        # Runtime Configuration - model-scoped runtime selection
+        self._runtime_config = None
+        if runtime is not None:
+            self._runtime_config = self._resolve_runtime_config(runtime)
+        
+        # Runtime resolver for per-turn resolution
+        self._runtime_resolver = None  # Will be initialized on first use
 
         # Telemetry - lazy initialized via property for performance
         self.__telemetry = None
@@ -5079,17 +5098,163 @@ Answer:"""
         
         raise TypeError(f"Invalid cli_backend type: {type(cli_backend)}. Expected CliBackendProtocol instance or factory callable.")
     
-    async def _chat_via_cli_backend(self, prompt: str, **kwargs) -> Optional[str]:
+    def _resolve_runtime_config(self, runtime):
+        """Resolve runtime parameter to AgentRuntimeConfig instance.
+        
+        Args:
+            runtime: Runtime configuration parameter
+            
+        Returns:
+            AgentRuntimeConfig instance
+            
+        Raises:
+            TypeError: If runtime type is invalid
+            ValueError: If runtime configuration is invalid
+        """
+        try:
+            from ..runtime import AgentRuntimeConfig
+        except ImportError:
+            raise ImportError(
+                "Runtime configuration features requested but not available. "
+                "This should not happen in a properly installed praisonaiagents package."
+            )
+        
+        # If already an AgentRuntimeConfig instance, return as-is
+        if isinstance(runtime, AgentRuntimeConfig):
+            return runtime
+        
+        # If string, create config with runtime ID
+        if isinstance(runtime, str):
+            return AgentRuntimeConfig.from_runtime_id(runtime)
+        
+        # If dictionary, create config from dict
+        if isinstance(runtime, dict):
+            return AgentRuntimeConfig.from_dict(runtime)
+        
+        raise TypeError(f"Invalid runtime type: {type(runtime)}. Expected str, dict, or AgentRuntimeConfig instance.")
+    
+    def _get_runtime_resolver(self):
+        """Get or create runtime resolver instance (lazy initialization)."""
+        if self._runtime_resolver is None:
+            try:
+                from ..runtime.resolver import RuntimeResolver
+                self._runtime_resolver = RuntimeResolver()
+            except ImportError:
+                raise ImportError(
+                    "Runtime resolution features requested but not available. "
+                    "This should not happen in a properly installed praisonaiagents package."
+                )
+        return self._runtime_resolver
+    
+    async def _resolve_turn_runtime(self):
+        """Resolve runtime for current turn based on model and configuration.
+        
+        Returns:
+            Runtime instance if resolution succeeds, None otherwise
+        """
+        try:
+            from ..runtime.resolver import RuntimeResolutionContext
+        except ImportError:
+            return None
+        
+        # Create resolution context with current model and provider info
+        context = RuntimeResolutionContext(
+            model_name=getattr(self, 'llm', None),
+            provider_name=self._extract_provider_from_model(getattr(self, 'llm', None)),
+            agent_config={'agent_id': getattr(self, 'agent_id', None)}
+        )
+        
+        try:
+            resolver = self._get_runtime_resolver()
+            result = resolver.resolve_runtime_instance(
+                context=context,
+                model_runtime_configs=getattr(self, '_model_runtime_configs', None),
+                provider_runtime_configs=getattr(self, '_provider_runtime_configs', None),
+                legacy_cli_backend=getattr(self, '_cli_backend', None)
+            )
+            
+            if result and result.runtime:
+                return result.runtime
+            
+        except (ValueError, RuntimeError) as e:
+            # Only fall back for registry not initialized, propagate configuration errors
+            if "not initialized" in str(e).lower():
+                # Registry not initialized - this is expected in SDK-only mode
+                pass
+            else:
+                # Configuration error (unknown runtime ID etc.) - fail closed
+                raise RuntimeError(
+                    f"Runtime resolution failed for agent={getattr(self, 'display_name', 'unknown')!r}, "
+                    f"model={getattr(self, 'llm', None)!r}: {e}. "
+                    "Fix the runtime ID/configuration or remove the runtime override."
+                ) from e
+        
+        return None
+    
+    def _extract_provider_from_model(self, model_name):
+        """Extract provider name from model name.
+        
+        Args:
+            model_name: Model name string (e.g., "anthropic/claude-3-sonnet")
+            
+        Returns:
+            Provider name if detectable, None otherwise
+        """
+        if not model_name or not isinstance(model_name, str):
+            return None
+        
+        # Common provider patterns
+        if '/' in model_name:
+            return model_name.split('/')[0]
+        
+        # Provider inference based on model name patterns
+        model_lower = model_name.lower()
+        if 'claude' in model_lower or 'anthropic' in model_lower:
+            return 'anthropic'
+        elif 'gpt' in model_lower or 'openai' in model_lower:
+            return 'openai'
+        elif 'gemini' in model_lower or 'google' in model_lower:
+            return 'google'
+        elif 'llama' in model_lower:
+            return 'meta'
+        
+        return None
+    
+    async def _chat_via_runtime(self, runtime_instance, prompt: str, **kwargs) -> Optional[str]:
+        """Chat implementation using resolved runtime instance.
+        
+        This is similar to _chat_via_cli_backend but uses the resolved runtime
+        from the model-scoped runtime resolution system.
+        
+        Args:
+            runtime_instance: Resolved runtime instance (CliBackendProtocol)
+            prompt: User prompt
+            **kwargs: Additional chat parameters
+            
+        Returns:
+            Runtime response content
+        """
+        if not runtime_instance:
+            raise RuntimeError("Runtime instance is None")
+        
+        # Delegate to CLI backend implementation with runtime instance
+        # Pass runtime instance directly to avoid mutating shared state
+        return await self._chat_via_cli_backend(prompt=prompt, cli_backend=runtime_instance, **kwargs)
+    
+    async def _chat_via_cli_backend(self, prompt: str, cli_backend: Any = None, **kwargs) -> Optional[str]:
         """Chat implementation using CLI backend delegation.
         
         Args:
             prompt: User prompt
+            cli_backend: Optional specific backend instance to use (for runtime delegation)
             **kwargs: Additional chat parameters (passed through as metadata)
             
         Returns:
             CLI backend response content
         """
-        if not self._cli_backend:
+        # Use provided backend or fall back to instance backend
+        backend = cli_backend or self._cli_backend
+        if not backend:
             raise RuntimeError("CLI backend not configured")
         
         try:
@@ -5128,7 +5293,7 @@ Answer:"""
                     images = None
             
             # Execute CLI backend
-            result = await self._cli_backend.execute(
+            result = await backend.execute(
                 prompt=prompt,
                 session=session_binding,
                 images=images,

src/praisonai-agents/praisonaiagents/agent/chat_mixin.py

@@ -87,12 +87,41 @@ Your Goal: {self.goal}"""
         
         # Add memory context if memory is enabled
         if self._memory_instance:
-            memory_context = self.get_memory_context()
-            if memory_context:
-                system_prompt += f"\n\n## Memory (Information you remember about the user)\n{memory_context}"
-                # Display memory info to user if verbose
-                if self.verbose:
-                    self._display_memory_info()
+            # Use cache-optimized context if model supports prompt caching and cache boundary is requested
+            use_cache_boundaries = hasattr(self, '_model_supports_prompt_caching') and self._model_supports_prompt_caching()
+            if use_cache_boundaries and hasattr(self._memory_instance, 'build_cache_optimized_context'):
+                try:
+                    # Get the goal/task description for context building
+                    task_desc = getattr(self, 'goal', '') or 'general assistance'
+                    cache_result = self._memory_instance.build_cache_optimized_context(
+                        task_descr=task_desc,
+                        include_cache_boundary=True
+                    )
+                    memory_context = cache_result.get('stable_prefix', '')
+                    cache_boundary = cache_result.get('cache_boundary', '')
+                    if memory_context:
+                        system_prompt += f"\n\n## Memory (Information you remember about the user)\n{memory_context}"
+                        if cache_boundary:
+                            system_prompt += cache_boundary
+                        # Display memory info to user if verbose
+                        if self.verbose:
+                            self._display_memory_info()
+                except (AttributeError, KeyError, TypeError) as e:
+                    # Fall back to standard memory context if cache optimization fails
+                    memory_context = self.get_memory_context()
+                    if memory_context:
+                        system_prompt += f"\n\n## Memory (Information you remember about the user)\n{memory_context}"
+                        # Display memory info to user if verbose
+                        if self.verbose:
+                            self._display_memory_info()
+            else:
+                # Standard memory context without cache boundaries
+                memory_context = self.get_memory_context()
+                if memory_context:
+                    system_prompt += f"\n\n## Memory (Information you remember about the user)\n{memory_context}"
+                    # Display memory info to user if verbose
+                    if self.verbose:
+                        self._display_memory_info()
             
             # Add learn context if learn is enabled (auto-inject when memory="learn")
             learn_context = self.get_learn_context()
@@ -452,6 +481,17 @@ Your Goal: {self.goal}"""
             else:
                 cleaned_tools.append(tool)
         
+        # Sort tools deterministically for cache stability
+        def sort_formatted_tools(tools_list):
+            """Sort already-formatted tool schemas by function name."""
+            def sort_key(tool):
+                if isinstance(tool, dict) and tool.get('type') == 'function':
+                    return str(tool.get('function', {}).get('name') or '')
+                return ''
+            return sorted(tools_list, key=sort_key)
+        
+        cleaned_tools = sort_formatted_tools(cleaned_tools)
+        
         # Cache the formatted tools with LRU eviction, including tool search metadata
         self._cache_put(
             self._formatted_tools_cache,
@@ -1327,7 +1367,7 @@ Your Goal: {self.goal}"""
         """
         Execute unified chat completion using composition instead of runtime class mutation.
         
-        This method provides the same functionality as UnifiedChatMixin but uses
+        This method provides a unified dispatch for all LLM providers using
         composition for safety and maintainability.
         """
         from ..llm import create_llm_dispatcher
@@ -1451,7 +1491,7 @@ Your Goal: {self.goal}"""
         """
         Execute unified async chat completion using composition instead of runtime class mutation.
         
-        This method provides the same functionality as UnifiedChatMixin but uses
+        This method provides a unified async dispatch for all LLM providers using
         composition for safety and maintainability.
         """
         from ..llm import create_llm_dispatcher

src/praisonai-agents/praisonaiagents/agent/memory_mixin.py

@@ -317,8 +317,9 @@ class MemoryMixin:
             return
         
         try:
-            from ..session import get_default_session_store
-            self._session_store = get_default_session_store()
+            if self._session_store is None:
+                from ..session import get_default_session_store
+                self._session_store = get_default_session_store()
             
             # Restore chat history from previous session
             history = self._session_store.get_chat_history(self._session_id)

src/praisonai-agents/praisonaiagents/agent/prepared_turn_mixin.py

@@ -0,0 +1,419 @@
+"""
+Prepared Turn Mixin for Agent class.
+
+This mixin provides the integration between the existing Agent class
+and the new PreparedTurnContext pattern. It demonstrates how to refactor
+existing execution methods to use the new standardized runtime approach.
+
+This mixin can be added to the Agent class to provide backward-compatible
+methods that use PreparedTurnContext internally while maintaining the
+existing API surface.
+"""
+
+import asyncio
+import logging
+from typing import List, Optional, Any, Dict, Union, TYPE_CHECKING
+
+if TYPE_CHECKING:
+    from ..runtime.turn_context import PreparedTurnContext
+
+from ..runtime import (
+    PreparedTurnContext,
+    default_context_builder,
+    RuntimeMode,
+)
+
+logger = logging.getLogger(__name__)
+
+
+class PreparedTurnMixin:
+    """
+    Mixin that adds PreparedTurnContext support to Agent class.
+    
+    This mixin demonstrates the integration path for existing agents
+    to use the new turn context pattern while maintaining backward
+    compatibility with existing APIs.
+    
+    Usage:
+        class Agent(PreparedTurnMixin, ChatMixin, ...):
+            # existing implementation
+            pass
+            
+        # New context-aware methods:
+        agent = Agent(...)
+        context = agent.prepare_turn_context("Hello", temperature=0.7)
+        response = await agent.execute_prepared_turn(context)
+        
+        # Or use the integrated chat method:
+        response = agent.chat_with_prepared_context("Hello", temperature=0.7)
+    """
+
+    def prepare_turn_context(
+        self,
+        prompt: str,
+        **kwargs: Any
+    ) -> PreparedTurnContext:
+        """
+        Prepare a turn context for execution.
+        
+        This method creates a PreparedTurnContext that captures all the
+        configuration needed for a single agent turn. The context can
+        then be passed to runtimes or used for inspection/debugging.
+        
+        Args:
+            prompt: User prompt for this turn
+            **kwargs: Additional execution parameters including:
+                - model: Override model ID  
+                - tools: Override tools list
+                - stream: Enable streaming
+                - temperature: Model temperature
+                - max_tokens: Token limit
+                - session_id: Session identifier
+                
+        Returns:
+            PreparedTurnContext ready for execution
+            
+        Example:
+            ```python
+            agent = Agent(name="helper", model="gpt-4")
+            context = agent.prepare_turn_context(
+                "What's the weather?",
+                temperature=0.7,
+                stream=True
+            )
+            
+            # Inspect the prepared context
+            print(f"Model: {context.model_ref.model_id}")
+            print(f"Tools: {len(context.tools)}")
+            print(f"Mode: {context.runtime_mode}")
+            ```
+        """
+        logger.debug(f"Preparing turn context for agent {getattr(self, 'name', 'Unknown')}")
+        
+        try:
+            context = default_context_builder.build_context(
+                agent=self,
+                prompt=prompt,
+                **kwargs
+            )
+            
+            logger.debug(
+                f"Prepared context: {context.get_message_count()} messages, "
+                f"{len(context.tools)} tools, {context.runtime_mode.value} mode"
+            )
+            
+            return context
+            
+        except Exception as e:
+            logger.error(f"Failed to prepare turn context: {e}")
+            raise
+
+    async def execute_prepared_turn(
+        self, 
+        context: PreparedTurnContext
+    ) -> str:
+        """
+        Execute a prepared turn context.
+        
+        This method takes a PreparedTurnContext and executes it using
+        the appropriate runtime. It demonstrates how prepared contexts
+        eliminate the need for scattered configuration gathering.
+        
+        Args:
+            context: The prepared turn context to execute
+            
+        Returns:
+            Agent response text
+            
+        Example:
+            ```python
+            # Prepare context
+            context = agent.prepare_turn_context("Hello")
+            
+            # Execute later (possibly in different context)
+            response = await agent.execute_prepared_turn(context)
+            ```
+        """
+        logger.debug(f"Executing prepared turn {context.correlation.turn_id}")
+        
+        try:
+            # Get the runtime for this context
+            runtime = self._get_runtime_for_prepared_context(context)
+            
+            # Validate runtime supports the context mode
+            if not runtime.supports_runtime_mode(context.runtime_mode):
+                raise ValueError(
+                    f"Runtime does not support mode {context.runtime_mode.value}"
+                )
+            
+            # Execute the turn
+            response = await runtime.run_turn(context)
+            
+            # Update agent state with response (maintain existing behavior)
+            await self._post_turn_processing(context, response)
+            
+            return response
+            
+        except Exception as e:
+            logger.error(f"Failed to execute prepared turn: {e}")
+            raise
+
+    def chat_with_prepared_context(
+        self,
+        prompt: str,
+        **kwargs: Any
+    ) -> str:
+        """
+        Sync chat using PreparedTurnContext pattern.
+        
+        This method provides a backward-compatible sync interface that
+        uses the new PreparedTurnContext pattern internally. It can
+        serve as a drop-in replacement for existing chat() methods.
+        
+        Args:
+            prompt: User prompt
+            **kwargs: Execution parameters
+            
+        Returns:
+            Agent response
+            
+        Example:
+            ```python
+            # Drop-in replacement for agent.chat()
+            response = agent.chat_with_prepared_context(
+                "Hello", 
+                temperature=0.7,
+                stream=True
+            )
+            ```
+        """
+        # Prepare context in one step
+        context = self.prepare_turn_context(prompt, **kwargs)
+        
+        # Execute synchronously
+        if hasattr(self, '_execute_sync'):
+            return self._execute_sync(context)
+        else:
+            # Check if we're already in a running event loop
+            try:
+                loop = asyncio.get_running_loop()
+                # If we get here, there's already a running loop
+                agent_id = getattr(self, 'id', getattr(self, 'session_id', getattr(self, 'name', 'unknown')))
+                raise RuntimeError(
+                    f"Cannot call chat_with_prepared_context from within a running event loop. "
+                    f"Use achat_with_prepared_context instead. Agent: {agent_id}"
+                )
+            except RuntimeError:
+                # No running loop, safe to call asyncio.run
+                pass
+            
+            # Fallback to asyncio.run
+            return asyncio.run(self.execute_prepared_turn(context))
+
+    async def achat_with_prepared_context(
+        self,
+        prompt: str, 
+        **kwargs: Any
+    ) -> str:
+        """
+        Async chat using PreparedTurnContext pattern.
+        
+        Args:
+            prompt: User prompt
+            **kwargs: Execution parameters
+            
+        Returns:
+            Agent response
+        """
+        # Prepare context in one step  
+        context = self.prepare_turn_context(prompt, **kwargs)
+        
+        # Execute asynchronously
+        return await self.execute_prepared_turn(context)
+
+    def _get_runtime_for_prepared_context(
+        self, 
+        context: PreparedTurnContext
+    ) -> Any:
+        """
+        Get the appropriate runtime for the prepared context.
+        
+        This method demonstrates runtime selection based on context
+        properties. In practice, this could integrate with the existing
+        execution infrastructure or plugin systems.
+        
+        Args:
+            context: The prepared turn context
+            
+        Returns:
+            Runtime instance that can execute the context
+        """
+        # For now, use a bridge runtime that delegates to existing methods
+        return PreparedTurnBridgeRuntime(self)
+
+    async def _post_turn_processing(
+        self,
+        context: PreparedTurnContext,
+        response: str
+    ) -> None:
+        """
+        Process results after turn execution.
+        
+        This method maintains existing agent behavior like updating
+        chat history, memory storage, etc. while working with the
+        new context pattern.
+        
+        Args:
+            context: The executed turn context
+            response: The response that was generated
+        """
+        # Update chat history (maintain existing behavior)
+        if hasattr(self, 'chat_history'):
+            # Extract original prompt from context
+            user_messages = [
+                msg for msg in context.transcript.messages
+                if msg.get('role') == 'user'
+            ]
+            if user_messages:
+                prompt = user_messages[-1]['content']
+                
+                # Add to chat history if not already there
+                if not self.chat_history or self.chat_history[-1].get('content') != prompt:
+                    self.chat_history.append({'role': 'user', 'content': prompt})
+                
+                # Add response
+                self.chat_history.append({'role': 'assistant', 'content': response})
+
+        # Store in memory if enabled
+        if hasattr(self, '_memory_instance') and self._memory_instance and response:
+            try:
+                user_messages = [
+                    msg for msg in context.transcript.messages
+                    if msg.get('role') == 'user'
+                ]
+                if user_messages:
+                    prompt = user_messages[-1]['content']
+                    self._memory_instance.store_short_term(
+                        f"User: {prompt}\nAssistant: {response}",
+                        metadata={
+                            "agent_id": getattr(self, 'agent_id', getattr(self, 'name', 'unknown_agent')),
+                            "turn_id": context.correlation.turn_id,
+                            "session_id": context.correlation.session_id
+                        }
+                    )
+            except Exception as e:
+                logger.warning(f"Failed to store interaction in memory: {e}")
+
+
+class PreparedTurnBridgeRuntime:
+    """
+    Bridge runtime that integrates PreparedTurnContext with existing Agent methods.
+    
+    This runtime demonstrates how to use prepared contexts while delegating
+    to existing agent execution infrastructure. It serves as a compatibility
+    layer during the transition to the new pattern.
+    """
+    
+    def __init__(self, agent):
+        self.agent = agent
+        self._supported_modes = [
+            RuntimeMode.SYNC,
+            RuntimeMode.ASYNC,
+            RuntimeMode.STREAM,
+            RuntimeMode.ASYNC_STREAM
+        ]
+
+    async def run_turn(self, context: PreparedTurnContext) -> str:
+        """
+        Execute a turn using existing agent infrastructure.
+        
+        This method bridges the new PreparedTurnContext pattern with
+        existing agent execution methods, demonstrating backward
+        compatibility during transition.
+        
+        Args:
+            context: The prepared turn context
+            
+        Returns:
+            Agent response
+        """
+        try:
+            # Extract execution parameters from context
+            execution_params = self._extract_execution_params(context)
+            
+            # Use existing agent execution method
+            if hasattr(self.agent, '_unified_chat_impl'):
+                # Use unified execution if available
+                response = await self.agent._unified_chat_impl(**execution_params)
+            else:
+                # Get LLM client and check if it has async support
+                llm_client = getattr(self.agent, 'llm_instance', None) or getattr(self.agent, 'llm', None)
+                if llm_client and hasattr(llm_client, 'get_response_async'):
+                    response = await llm_client.get_response_async(**execution_params)
+                elif hasattr(self.agent, 'chat'):
+                    # Fallback to sync method - avoid duplicate prompt
+                    prompt = execution_params.get('prompt', '')
+                    passthrough = {k: v for k, v in execution_params.items() if k != 'prompt'}
+                    response = self.agent.chat(prompt, **passthrough)
+                else:
+                    raise RuntimeError("No execution method available")
+            
+            return response or ""
+            
+        except Exception as e:
+            logger.error(f"Bridge runtime execution failed: {e}")
+            raise
+
+    def _extract_execution_params(self, context: PreparedTurnContext) -> Dict[str, Any]:
+        """
+        Extract execution parameters from PreparedTurnContext.
+        
+        This method demonstrates how to convert the prepared context
+        back to the parameters expected by existing execution methods.
+        
+        Args:
+            context: The prepared turn context
+            
+        Returns:
+            Dictionary of parameters for existing execution methods
+        """
+        # Extract prompt from transcript
+        user_messages = [
+            msg for msg in context.transcript.messages
+            if msg.get('role') == 'user'
+        ]
+        prompt = user_messages[-1]['content'] if user_messages else ""
+        
+        # Extract tools
+        tools = [tool.callable for tool in context.tools if tool.callable is not None]
+        if not tools:
+            tools = None  # Let existing method use default tools
+        
+        # Build parameters dictionary
+        params = {
+            'prompt': prompt,
+            'tools': tools,
+            'stream': context.delivery.enable_streaming,
+            **context.model_ref.model_config  # Include temperature, max_tokens, etc.
+        }
+        
+        # Add system prompt to chat history for existing methods
+        if context.transcript.system_prompt and hasattr(self.agent, 'chat_history'):
+            # Temporarily modify agent's system behavior
+            original_system = getattr(self.agent, 'use_system_prompt', True)
+            params['system_prompt'] = context.transcript.system_prompt
+            
+        # Add chat history (exclude only the current user message, keep prior conversation)
+        chat_history = context.transcript.messages[:-1]  # Exclude current user message
+        if chat_history:
+            params['chat_history'] = chat_history
+        
+        return params
+
+    def supports_runtime_mode(self, mode: RuntimeMode) -> bool:
+        """Check if this runtime supports the given mode."""
+        return mode in self._supported_modes
+
+    def get_supported_modes(self) -> List[RuntimeMode]:
+        """Get all supported runtime modes."""
+        return self._supported_modes.copy()

src/praisonai-agents/praisonaiagents/agent/sandbox_mixin.py

@@ -5,15 +5,10 @@ Provides safe code execution capabilities to agents via the sandbox framework.
 """
 
 import logging
-from typing import Optional, Dict, Any, Union
+from typing import Optional, Dict, Any, Union, TYPE_CHECKING
 
-from ..sandbox import (
-    SandboxConfig, 
-    SandboxManager, 
-    SandboxResult,
-    check_code_safety,
-    format_warnings,
-)
+if TYPE_CHECKING:
+    from ..sandbox import SandboxConfig, SandboxManager, SandboxResult
 
 logger = logging.getLogger(__name__)
 
@@ -26,27 +21,33 @@ class SandboxMixin:
     
     def __init__(self, *args, **kwargs):
         # Extract sandbox config from kwargs
-        self.sandbox_config: Optional[SandboxConfig] = kwargs.pop('sandbox', None)
+        sandbox = kwargs.pop('sandbox', None)
         
         # Convert boolean True to default config
-        if self.sandbox_config is True:
-            self.sandbox_config = SandboxConfig.subprocess()
+        if sandbox is True:
+            from ..sandbox import SandboxConfig
+            sandbox = SandboxConfig.subprocess()
+        elif sandbox is False:
+            sandbox = None
+        
+        self.sandbox_config: Optional['SandboxConfig'] = sandbox
         
         super().__init__(*args, **kwargs)
         
-        self._sandbox_manager: Optional[SandboxManager] = None
+        self._sandbox_manager: Optional['SandboxManager'] = None
     
     @property
     def has_sandbox(self) -> bool:
         """Check if sandbox is configured for this agent."""
         return self.sandbox_config is not None
     
-    def get_sandbox_manager(self) -> Optional[SandboxManager]:
+    def get_sandbox_manager(self) -> Optional['SandboxManager']:
         """Get or create sandbox manager."""
         if not self.has_sandbox:
             return None
         
         if self._sandbox_manager is None:
+            from ..sandbox import SandboxManager
             self._sandbox_manager = SandboxManager(self.sandbox_config)
         
         return self._sandbox_manager
@@ -57,7 +58,7 @@ class SandboxMixin:
         language: str = "python",
         check_security: bool = True,
         **kwargs
-    ) -> SandboxResult:
+    ) -> 'SandboxResult':
         """Execute code safely in configured sandbox.
         
         Args:
@@ -79,6 +80,7 @@ class SandboxMixin:
         
         # Security pre-check if enabled
         if check_security:
+            from ..sandbox import check_code_safety, format_warnings
             warnings = check_code_safety(code, language)
             if warnings:
                 warning_text = format_warnings(warnings)
@@ -97,7 +99,7 @@ class SandboxMixin:
         language: str = "python", 
         check_security: bool = True,
         **kwargs
-    ) -> SandboxResult:
+    ) -> 'SandboxResult':
         """Synchronous wrapper for execute_code.
         
         Args:
@@ -117,7 +119,7 @@ class SandboxMixin:
         command: Union[str, list],
         check_security: bool = True,
         **kwargs
-    ) -> SandboxResult:
+    ) -> 'SandboxResult':
         """Run a shell command in the sandbox.
         
         Args:
@@ -139,6 +141,7 @@ class SandboxMixin:
         
         # Security pre-check
         if check_security:
+            from ..sandbox import check_code_safety, format_warnings
             warnings = check_code_safety(command_str, "bash")
             if warnings:
                 warning_text = format_warnings(warnings)

src/praisonai-agents/praisonaiagents/agent/tool_execution.py

@@ -231,9 +231,10 @@ class ToolExecutionMixin:
                     arguments.update(res.output.modified_data)
 
             # Loop guard check - prevent tool execution loops with graduated response
-            if hasattr(self, '_loop_guard') and self._loop_guard:
+            if hasattr(self, '_ensure_loop_guard'):
+                loop_guard = self._ensure_loop_guard()
                 from ..escalation.loop_guard import GuardAction
-                decision = self._loop_guard.check(function_name, arguments, is_pre_execution=True)
+                decision = loop_guard.check(function_name, arguments, is_pre_execution=True)
                 
                 if decision.action == GuardAction.WARN:
                     # Inject warning into tool result so LLM sees guidance
@@ -245,7 +246,6 @@ class ToolExecutionMixin:
                     blocked_result = {"error": f"[loop-guard] {decision.message}", "loop_blocked": True}
                 elif decision.action == GuardAction.HALT:
                     # Halt execution with exception
-                    from ..errors import ToolExecutionError
                     raise ToolExecutionError(
                         f"[loop-guard] {decision.message}",
                         tool_name=function_name,
@@ -394,11 +394,12 @@ class ToolExecutionMixin:
                     self._doom_loop_tracker.mark_progress(f"tool:{function_name}")
             
             # Record tool execution in loop guard
-            if hasattr(self, '_loop_guard') and self._loop_guard:
+            if hasattr(self, '_ensure_loop_guard'):
+                loop_guard = self._ensure_loop_guard()
                 is_success = result is not None and not (isinstance(result, dict) and result.get('error'))
-                self._loop_guard.record(function_name, arguments, is_success)
+                loop_guard.record(function_name, arguments, is_success)
                 # Handle warning injection for WARN decisions
-                decision = self._loop_guard.check(function_name, arguments, is_pre_execution=False) 
+                decision = loop_guard.check(function_name, arguments, is_pre_execution=False) 
                 if decision.action.value == "warn":
                     if isinstance(result, str):
                         result = f"{result}\n\n[loop-guard] {decision.message}"
@@ -584,12 +585,22 @@ class ToolExecutionMixin:
         from ..approval import get_approval_registry
         from ..approval.protocols import ApprovalRequest, ApprovalDecision
         from ..approval.registry import DEFAULT_DANGEROUS_TOOLS
+        from ..tools import get_registry as get_tool_registry
         
         backend = getattr(self, '_approval_backend', None)
         approve_all = getattr(self, '_approve_all_tools', False)
         
+        # Check tool trust level if available
+        tool_registry = get_tool_registry()
+        trust_level = tool_registry.get_trust_level(tool_name)
+        
         if backend is not None:
-            needs_approval = approve_all or tool_name in DEFAULT_DANGEROUS_TOOLS
+            # Check if tool needs approval based on multiple criteria
+            needs_approval = (
+                approve_all 
+                or tool_name in DEFAULT_DANGEROUS_TOOLS
+                or (trust_level == "external")  # External tools need approval
+            )
             if needs_approval:
                 request = ApprovalRequest(
                     tool_name=tool_name,

src/praisonai-agents/praisonaiagents/agent/turn_execution_mixin.py

@@ -0,0 +1,356 @@
+"""
+Turn Execution Mixin - implements PreparedTurnContext runtime integration.
+
+This module provides the TurnExecutionMixin that uses PreparedTurnContext
+for standardized runtime preparation and execution. It demonstrates how
+to refactor existing execution code to use the new turn context pattern.
+
+This serves as an example integration and can be used alongside or to 
+replace portions of unified_execution_mixin.py.
+"""
+
+import asyncio
+import logging
+from typing import List, Optional, Any, Dict, Union, TYPE_CHECKING
+
+if TYPE_CHECKING:
+    from ..runtime.turn_context import PreparedTurnContext
+
+from ..runtime import (
+    PreparedTurnContext,
+    default_context_builder,
+    RuntimeMode,
+    TurnRuntimeProtocol
+)
+
+logger = logging.getLogger(__name__)
+
+
+class TurnExecutionMixin:
+    """
+    Mixin providing turn-based execution using PreparedTurnContext.
+    
+    This mixin demonstrates the new execution pattern where context
+    is prepared in a single preflight step, then passed to runtimes
+    for read-only execution.
+    """
+
+    async def _execute_with_prepared_context(
+        self,
+        prompt: str,
+        **kwargs: Any
+    ) -> Optional[str]:
+        """
+        Execute using PreparedTurnContext pattern.
+        
+        This method demonstrates how to refactor existing execution
+        to use the new turn context approach:
+        
+        1. Build PreparedTurnContext in preflight step
+        2. Pass immutable context to runtime for execution
+        3. Mutations go through defined hooks only
+        
+        Args:
+            prompt: User prompt for this turn
+            **kwargs: Additional execution parameters
+            
+        Returns:
+            Agent response or None if blocked
+        """
+        try:
+            # Step 1: Prepare turn context (replaces scattered preparation)
+            context = default_context_builder.build_context(
+                agent=self,
+                prompt=prompt,
+                **kwargs
+            )
+            
+            logger.debug(f"Prepared turn context: {context.to_dict()}")
+            
+            # Step 2: Apply pre-execution hooks if context allows
+            if hasattr(self, '_apply_pre_execution_hooks'):
+                context = await self._apply_pre_execution_hooks(context)
+            
+            # Step 3: Execute using the appropriate runtime
+            runtime = self._get_runtime_for_context(context)
+            if not runtime.supports_runtime_mode(context.runtime_mode):
+                raise ValueError(
+                    f"Runtime {type(runtime).__name__} does not support "
+                    f"mode {context.runtime_mode.value}"
+                )
+            
+            # Step 4: Run the turn with prepared context
+            response = await runtime.run_turn(context)
+            
+            # Step 5: Apply post-execution hooks if needed
+            if hasattr(self, '_apply_post_execution_hooks'):
+                response = await self._apply_post_execution_hooks(context, response)
+            
+            return response
+            
+        except Exception as e:
+            logger.error(f"Turn execution failed: {e}")
+            raise
+
+    def _get_runtime_for_context(self, context: PreparedTurnContext) -> TurnRuntimeProtocol:
+        """
+        Get the appropriate runtime for the prepared context.
+        
+        This method demonstrates runtime selection based on context
+        properties. In practice, this could be more sophisticated
+        (e.g., plugin registry, configuration-based selection).
+        
+        Args:
+            context: The prepared turn context
+            
+        Returns:
+            Runtime instance that can execute the context
+        """
+        # For now, return a default runtime that delegates to existing execution
+        return DefaultAgentRuntime(self)
+
+    def chat_with_context(
+        self,
+        prompt: str,
+        **kwargs: Any
+    ) -> Optional[str]:
+        """
+        Sync wrapper for context-based execution.
+        
+        This provides a sync interface while using the new
+        PreparedTurnContext pattern internally.
+        
+        Args:
+            prompt: User prompt
+            **kwargs: Additional parameters
+            
+        Returns:
+            Agent response
+        """
+        # Check if we're already in a running event loop
+        try:
+            loop = asyncio.get_running_loop()
+            # If we get here, there's already a running loop
+            agent_id = getattr(self, 'id', getattr(self, 'session_id', getattr(self, 'name', 'unknown')))
+            raise RuntimeError(
+                f"Cannot call chat_with_context from within a running event loop. "
+                f"Use achat_with_context instead. Agent: {agent_id}"
+            )
+        except RuntimeError:
+            # No running loop, safe to call asyncio.run
+            pass
+        
+        # Run in new event loop
+        return asyncio.run(self._execute_with_prepared_context(prompt, **kwargs))
+
+    async def achat_with_context(
+        self,
+        prompt: str,
+        **kwargs: Any
+    ) -> Optional[str]:
+        """
+        Async interface for context-based execution.
+        
+        Args:
+            prompt: User prompt
+            **kwargs: Additional parameters
+            
+        Returns:
+            Agent response
+        """
+        return await self._execute_with_prepared_context(prompt, **kwargs)
+
+
+class DefaultAgentRuntime:
+    """
+    Default runtime implementation that delegates to existing Agent methods.
+    
+    This runtime bridges the new PreparedTurnContext pattern with the
+    existing agent execution infrastructure. It demonstrates how to
+    create a runtime that uses the prepared context while maintaining
+    compatibility with existing code.
+    """
+    
+    def __init__(self, agent):
+        self.agent = agent
+        self._supported_modes = [
+            RuntimeMode.SYNC,
+            RuntimeMode.ASYNC,
+            RuntimeMode.STREAM,
+            RuntimeMode.ASYNC_STREAM
+        ]
+    
+    async def run_turn(self, context: PreparedTurnContext) -> str:
+        """
+        Execute a turn using the prepared context.
+        
+        This implementation demonstrates how to use the context
+        to drive existing agent execution while eliminating
+        scattered preparation logic.
+        
+        Args:
+            context: The prepared turn context
+            
+        Returns:
+            Agent response
+        """
+        try:
+            # Extract prompt from transcript
+            user_messages = [
+                msg for msg in context.transcript.messages
+                if msg.get('role') == 'user'
+            ]
+            if not user_messages:
+                raise ValueError("No user message found in transcript")
+            
+            prompt = user_messages[-1]['content']
+            
+            # Use the prepared context to drive execution
+            return await self._execute_with_context_data(prompt, context)
+            
+        except Exception as e:
+            logger.error(f"Runtime execution failed: {e}")
+            raise
+
+    async def _execute_with_context_data(
+        self, 
+        prompt: str, 
+        context: PreparedTurnContext
+    ) -> str:
+        """
+        Execute using context data instead of scattered preparation.
+        
+        This method shows how to use the prepared context components
+        instead of re-preparing them during execution.
+        """
+        # Get LLM client (existing pattern)
+        llm_client = getattr(self.agent, 'llm_instance', None) or getattr(self.agent, 'llm', None)
+        if llm_client is None:
+            raise RuntimeError("No LLM client available")
+        
+        # Use prepared model reference and tools
+        model_config = context.model_ref.model_config
+        tools = [tool.callable for tool in context.tools if tool.callable is not None]
+        
+        # Use prepared transcript instead of rebuilding
+        chat_history = context.transcript.messages[:-1]  # Exclude current prompt
+        system_prompt = context.transcript.system_prompt
+        
+        # Execute based on runtime mode
+        if context.runtime_mode in (RuntimeMode.STREAM, RuntimeMode.ASYNC_STREAM):
+            return await self._execute_streaming(
+                llm_client, prompt, system_prompt, chat_history, tools, model_config, context
+            )
+        else:
+            return await self._execute_standard(
+                llm_client, prompt, system_prompt, chat_history, tools, model_config, context
+            )
+
+    async def _execute_standard(
+        self,
+        llm_client,
+        prompt: str,
+        system_prompt: str,
+        chat_history: List[Dict[str, Any]],
+        tools: List[Any],
+        model_config: Dict[str, Any],
+        context: PreparedTurnContext
+    ) -> str:
+        """Execute standard (non-streaming) request."""
+        if hasattr(llm_client, 'get_response_async'):
+            return await llm_client.get_response_async(
+                prompt=prompt,
+                system_prompt=system_prompt,
+                chat_history=chat_history,
+                tools=tools,
+                **model_config
+            )
+        else:
+            # Fallback to sync method - wrap in thread to avoid blocking event loop
+            return await asyncio.to_thread(
+                llm_client.get_response,
+                prompt=prompt,
+                system_prompt=system_prompt,
+                chat_history=chat_history,
+                tools=tools,
+                **model_config
+            )
+
+    async def _execute_streaming(
+        self,
+        llm_client,
+        prompt: str,
+        system_prompt: str,
+        chat_history: List[Dict[str, Any]],
+        tools: List[Any],
+        model_config: Dict[str, Any],
+        context: PreparedTurnContext
+    ) -> str:
+        """Execute streaming request using prepared delivery channels."""
+        # Use prepared streaming configuration
+        if not context.delivery.has_streaming():
+            raise ValueError("Streaming requested but no streaming configuration in context")
+        
+        # Configure streaming with prepared emitter
+        model_config['stream'] = True
+        
+        if hasattr(llm_client, 'get_response_async'):
+            response = await llm_client.get_response_async(
+                prompt=prompt,
+                system_prompt=system_prompt,
+                chat_history=chat_history,
+                tools=tools,
+                **model_config
+            )
+        else:
+            response = await asyncio.to_thread(
+                llm_client.get_response,
+                prompt=prompt,
+                system_prompt=system_prompt,
+                chat_history=chat_history,
+                tools=tools,
+                **model_config
+            )
+        
+        return response
+
+    def supports_runtime_mode(self, mode: RuntimeMode) -> bool:
+        """Check if this runtime supports the given mode."""
+        return mode in self._supported_modes
+
+    def get_supported_modes(self) -> List[RuntimeMode]:
+        """Get all supported runtime modes."""
+        return self._supported_modes.copy()
+
+
+class MinimalTurnRuntime:
+    """
+    Minimal runtime implementation for testing and examples.
+    
+    This runtime demonstrates the simplest possible implementation
+    of the TurnRuntimeProtocol for testing the PreparedTurnContext
+    pattern without complex execution logic.
+    """
+    
+    def __init__(self, response_template: str = "Mock response to: {prompt}"):
+        self.response_template = response_template
+    
+    async def run_turn(self, context: PreparedTurnContext) -> str:
+        """Execute a minimal turn for testing."""
+        # Extract prompt from context
+        user_messages = [
+            msg for msg in context.transcript.messages
+            if msg.get('role') == 'user'
+        ]
+        prompt = user_messages[-1]['content'] if user_messages else "No prompt"
+        
+        # Return simple response
+        return self.response_template.format(prompt=prompt)
+    
+    def supports_runtime_mode(self, mode: RuntimeMode) -> bool:
+        """Support all modes for testing."""
+        return True
+    
+    def get_supported_modes(self) -> List[RuntimeMode]:
+        """Get all supported modes."""
+        return list(RuntimeMode)

src/praisonai-agents/praisonaiagents/agent/unified_chat_mixin.py

@@ -1,152 +0,0 @@
-"""
-Unified Chat Mixin for Agent class.
-
-This module consolidates the dual execution paths (custom LLM vs OpenAI)
-into a single async-first protocol-driven implementation, eliminating
-the DRY violation and maintenance burden described in Issue #1304.
-"""
-
-import asyncio
-import logging
-import time
-from typing import Any, Dict, List, Optional, Union
-
-from ..llm import create_llm_dispatcher, UnifiedLLMDispatcher
-
-
-class UnifiedChatMixin:
-    """
-    Unified chat implementation that replaces dual execution paths.
-    
-    This mixin consolidates:
-    - Path A: LLM.get_response() / LLM.get_response_async() 
-    - Path B: OpenAIClient chat completion
-    
-    Into a single async-first protocol-driven dispatch using UnifiedLLMDispatcher.
-    """
-    
-    def _get_unified_dispatcher(self) -> UnifiedLLMDispatcher:
-        """
-        Get or create the unified LLM dispatcher for this agent.
-        
-        This method implements the provider selection logic that was
-        previously scattered in _chat_completion() method.
-        """
-        if hasattr(self, '_unified_dispatcher') and self._unified_dispatcher is not None:
-            return self._unified_dispatcher
-        
-        # Determine which adapter to use based on existing agent configuration
-        if self._using_custom_llm and hasattr(self, 'llm_instance'):
-            # Use LiteLLM adapter for custom LLM instances
-            dispatcher = create_llm_dispatcher(llm_instance=self.llm_instance)
-        else:
-            # Use OpenAI adapter for direct OpenAI access
-            if not hasattr(self, '_openai_client') or self._openai_client is None:
-                # Initialize OpenAI client if not present
-                from ..llm import get_openai_client
-                self._openai_client = get_openai_client(api_key=getattr(self, 'api_key', None))
-            dispatcher = create_llm_dispatcher(openai_client=self._openai_client, model=self.llm)
-        
-        # Cache the dispatcher
-        self._unified_dispatcher = dispatcher
-        return dispatcher
-    
-    def _unified_chat_completion(
-        self, 
-        messages: List[Dict[str, Any]], 
-        temperature: float = 1.0, 
-        tools: Optional[List[Dict[str, Any]]] = None, 
-        stream: bool = True,
-        reasoning_steps: bool = False,
-        task_name: Optional[str] = None,
-        task_description: Optional[str] = None,
-        task_id: Optional[str] = None,
-        response_format: Optional[Dict[str, Any]] = None
-    ) -> Any:
-        """
-        Unified sync chat completion method.
-        
-        This replaces the existing _chat_completion() method's dual dispatch logic
-        with a single path through UnifiedLLMDispatcher.
-        """
-        start_time = time.time()
-        
-        # Get unified dispatcher (handles provider selection)
-        dispatcher = self._get_unified_dispatcher()
-        
-        # Use the same message processing logic but route through unified dispatcher
-        formatted_tools = self._format_tools_for_completion(tools)
-        
-        try:
-            # Single dispatch path for all providers
-            final_response = dispatcher.chat_completion(
-                messages=messages,
-                tools=formatted_tools,
-                temperature=temperature,
-                max_tokens=getattr(self, 'max_tokens', None),
-                stream=stream,
-                response_format=response_format,
-                **{
-                    'reasoning_steps': reasoning_steps,
-                    'task_name': task_name,
-                    'task_description': task_description,
-                    'task_id': task_id,
-                }
-            )
-            
-            return final_response
-            
-        except Exception as e:
-            logging.error(f"Unified chat completion failed: {e}")
-            # Apply the same error handling as the original implementation
-            raise
-    
-    async def _unified_achat_completion(
-        self, 
-        messages: List[Dict[str, Any]], 
-        temperature: float = 1.0, 
-        tools: Optional[List[Dict[str, Any]]] = None, 
-        stream: bool = True,
-        reasoning_steps: bool = False,
-        task_name: Optional[str] = None,
-        task_description: Optional[str] = None,
-        task_id: Optional[str] = None,
-        response_format: Optional[Dict[str, Any]] = None
-    ) -> Any:
-        """
-        Unified async chat completion method.
-        
-        This provides native async implementation, eliminating the need
-        for separate async/sync implementations in the LLM layer.
-        """
-        start_time = time.time()
-        
-        # Get unified dispatcher (handles provider selection)
-        dispatcher = self._get_unified_dispatcher()
-        
-        # Use the same message processing logic but route through unified dispatcher
-        formatted_tools = self._format_tools_for_completion(tools)
-        
-        try:
-            # Single async dispatch path for all providers
-            final_response = await dispatcher.achat_completion(
-                messages=messages,
-                tools=formatted_tools,
-                temperature=temperature,
-                max_tokens=getattr(self, 'max_tokens', None),
-                stream=stream,
-                response_format=response_format,
-                **{
-                    'reasoning_steps': reasoning_steps,
-                    'task_name': task_name,
-                    'task_description': task_description,
-                    'task_id': task_id,
-                }
-            )
-            
-            return final_response
-            
-        except Exception as e:
-            logging.error(f"Unified async chat completion failed: {e}")
-            # Apply the same error handling as the original implementation
-            raise

src/praisonai-agents/praisonaiagents/agent/unified_execution_mixin.py

@@ -78,12 +78,37 @@ class UnifiedExecutionMixin:
         _trace_emitter.agent_start(self.name, {"role": self.role, "goal": self.goal})
         
         # Reset loop guard for new chat turn (always-on protection)
-        if hasattr(self, '_loop_guard') and self._loop_guard:
-            self._loop_guard.reset_turn()
+        if hasattr(self, '_ensure_loop_guard'):
+            self._ensure_loop_guard().reset_turn()
         
         try:
-            # CLI Backend routing - delegate entire turn if configured
-            if hasattr(self, '_cli_backend') and self._cli_backend is not None:
+            # Runtime resolution - check for model-scoped runtime before legacy CLI backend
+            runtime_instance = None
+            if getattr(self, '_runtime_config', None) is not None:
+                runtime_instance = await self._resolve_turn_runtime()
+            
+            # Model-scoped runtime routing - delegate entire turn to resolved runtime
+            if runtime_instance is not None:
+                return await self._chat_via_runtime(
+                    runtime_instance=runtime_instance,
+                    prompt=prompt,
+                    temperature=temperature,
+                    tools=tools,
+                    output_json=output_json,
+                    output_pydantic=output_pydantic,
+                    reasoning_steps=reasoning_steps,
+                    stream=stream,
+                    task_name=task_name,
+                    task_description=task_description,
+                    task_id=task_id,
+                    config=config,
+                    force_retrieval=force_retrieval,
+                    skip_retrieval=skip_retrieval,
+                    attachments=attachments,
+                    tool_choice=tool_choice
+                )
+            elif hasattr(self, '_cli_backend') and self._cli_backend is not None:
+                # Legacy CLI backend with deprecation warning (emitted in Agent.__init__)
                 return await self._chat_via_cli_backend(
                     prompt=prompt,
                     temperature=temperature,

src/praisonai-agents/praisonaiagents/agents/agents.py

@@ -40,6 +40,21 @@ class TaskStatus(Enum):
 # Set up logger
 logger = get_logger(__name__)
 
+
+def _launch_auth_token() -> Optional[str]:
+    return os.environ.get("PRAISONAI_LAUNCH_AUTH_TOKEN")
+
+
+def _authorise_launch_request(request) -> bool:
+    token = _launch_auth_token()
+    if not token:
+        return True
+    auth = request.headers.get("Authorization", "")
+    if auth.startswith("Bearer ") and auth[7:] == token:
+        return True
+    return request.headers.get("X-Auth-Token") == token
+
+
 # Agent server registry for thread-safe server management
 
 
@@ -245,7 +260,20 @@ Expected Output: {task.expected_output}."""
     # Add memory context if available
     if task.memory:
         try:
-            memory_context = task.memory.build_context_for_task(task.description)
+            # Use cache-optimized context if available for better prompt caching
+            if hasattr(task.memory, 'build_cache_optimized_context'):
+                try:
+                    cache_result = task.memory.build_cache_optimized_context(
+                        task_descr=task.description,
+                        include_cache_boundary=False  # Don't include boundary for agent task context
+                    )
+                    memory_context = cache_result.get('stable_prefix', '')
+                except Exception as e:
+                    # Fall back to standard context building
+                    logger.debug(f"Cache-optimized context failed for task '{task.description or task.id}', falling back to standard: {e}")
+                    memory_context = task.memory.build_context_for_task(task.description)
+            else:
+                memory_context = task.memory.build_context_for_task(task.description)
             if memory_context:
                 # Log detailed memory context for debugging
                 logger.debug(f"Memory context for task '{task.description}': {memory_context}")
@@ -652,7 +680,7 @@ class AgentTeam(SpawnAnnounceProtocol):
             _stream = _output_config.stream
         else:
             _verbose = 0
-            _stream = True
+            _stream = False
         
         # ─────────────────────────────────────────────────────────────────────
         # Resolve EXECUTION param using canonical resolver
@@ -1993,6 +2021,8 @@ class AgentTeam(SpawnAnnounceProtocol):
             # Define the endpoint handler
             @app.post(path)
             async def handle_query(request: Request, query_data: Optional[AgentQuery] = None):
+                if not _authorise_launch_request(request):
+                    raise HTTPException(status_code=401, detail="Unauthorized")
                 # Handle both direct JSON with query field and form data
                 if query_data is None:
                     try:
@@ -2071,7 +2101,9 @@ class AgentTeam(SpawnAnnounceProtocol):
             
             # Add GET endpoint to list available agents
             @app.get(f"{path}/list")
-            async def list_agents():
+            async def list_agents(request: Request):
+                if not _authorise_launch_request(request):
+                    raise HTTPException(status_code=401, detail="Unauthorized")
                 return {
                     "agents": [
                         {"name": agent.display_name, "id": agent.display_name.lower().replace(' ', '_')}
@@ -2086,6 +2118,8 @@ class AgentTeam(SpawnAnnounceProtocol):
                 # Create a closure to capture the agent instance
                 def create_agent_handler(agent):
                     async def handle_single_agent(request: Request):
+                        if not _authorise_launch_request(request):
+                            raise HTTPException(status_code=401, detail="Unauthorized")
                         try:
                             request_data = await request.json()
                             query = request_data.get("query", "")

src/praisonai-agents/praisonaiagents/app/config.py

@@ -53,3 +53,4 @@ class AgentAppConfig:
     workers: int = 1
     timeout: int = 60
     metadata: Dict[str, Any] = field(default_factory=dict)
+    api_key: Optional[str] = None

src/praisonai-agents/praisonaiagents/approval/registry.py

@@ -194,9 +194,13 @@ class ApprovalRegistry:
 
     def is_yaml_approved(self, tool_name: str) -> bool:
         try:
-            return tool_name in self._yaml_approved_tools.get()
+            if tool_name not in self._yaml_approved_tools.get():
+                return False
         except LookupError:
             return False
+        if self.get_risk_level(tool_name) == "critical":
+            return False
+        return True
 
     # ── Env-var check ────────────────────────────────────────────────────
 

src/praisonai-agents/praisonaiagents/bots/__init__.py

@@ -24,6 +24,19 @@ if TYPE_CHECKING:
         HealthResult,
         EmailProtocol,
         EmailInbox,
+        SupportsPresentation,
+        PlatformCapabilities,
+    )
+    from .presentation import (
+        MessagePresentation,
+        PresentationBlock,
+        PresentationButton,
+        PresentationAction,
+        SelectOption,
+        PresentationLimits,
+        ActionType,
+        ButtonStyle,
+        BlockType,
     )
 from .protocols import (
     BotProtocol,
@@ -41,6 +54,19 @@ from .protocols import (
     HealthResult,
     EmailProtocol,
     EmailInbox,
+    SupportsPresentation,
+    PlatformCapabilities,
+)
+from .presentation import (
+    MessagePresentation,
+    PresentationBlock,
+    PresentationButton,
+    PresentationAction,
+    SelectOption,
+    PresentationLimits,
+    ActionType,
+    ButtonStyle,
+    BlockType,
 )
 from .config import BotConfig, BotOSConfig
 
@@ -62,4 +88,15 @@ __all__ = [
     "HealthResult",
     "EmailProtocol",
     "EmailInbox",
+    "MessagePresentation",
+    "PresentationBlock",
+    "PresentationButton",
+    "PresentationAction",
+    "SelectOption",
+    "PresentationLimits",
+    "SupportsPresentation",
+    "ActionType",
+    "ButtonStyle",
+    "BlockType",
+    "PlatformCapabilities",
 ]

src/praisonai-agents/praisonaiagents/bots/config.py

@@ -91,6 +91,16 @@ class BotConfig:
     # When set, stale sessions older than this are auto-reaped.
     session_ttl: int = 0
     
+    # In-flight run control settings for mid-run message handling
+    # busy_mode: Policy for handling messages during active runs
+    #   - "queue": Queue message for next turn (default)
+    #   - "interrupt": Cancel current run and start new one  
+    #   - "steer": Inject message into current run via steering
+    busy_mode: str = "queue"
+    
+    # Template for busy acknowledgment messages (use {action} placeholder)
+    busy_ack: str = "⏳ {action} — will be considered next"
+    
     # Workspace settings for file operation containment and security
     workspace_dir: Optional[str] = None  # default: ~/.praisonai/workspaces/<scope>/<session_key>
     workspace_access: str = "rw"  # "rw" (read-write) | "ro" (read-only) | "none" (copy-on-write sandbox)
@@ -101,6 +111,12 @@ class BotConfig:
     
     # Owner user ID for pairing approvals (platform-specific format)
     owner_user_id: Optional[str] = None
+    
+    # Progressive streaming for channel bots (default: False)
+    streaming: bool = False
+    
+    # Edit interval for streaming responses in milliseconds (default: 700ms)
+    stream_edit_interval_ms: int = 700
 
     def __post_init__(self) -> None:
         if self.unknown_user_policy not in {"deny", "pair", "allow"}:
@@ -136,11 +152,15 @@ class BotConfig:
             "ack_emoji": self.ack_emoji,
             "done_emoji": self.done_emoji,
             "session_ttl": self.session_ttl,
+            "busy_mode": self.busy_mode,
+            "busy_ack": self.busy_ack,
             "workspace_dir": self.workspace_dir,
             "workspace_access": self.workspace_access,
             "workspace_scope": self.workspace_scope,
             "unknown_user_policy": self.unknown_user_policy,
             "owner_user_id": "***" if self.owner_user_id else None,
+            "streaming": self.streaming,
+            "stream_edit_interval_ms": self.stream_edit_interval_ms,
             "metadata": self.metadata,
         }
     

src/praisonai-agents/praisonaiagents/bots/presentation.py

@@ -0,0 +1,456 @@
+"""
+Presentation primitives for interactive UI in messaging bots.
+
+Defines typed, portable presentation blocks (buttons, selects, text)
+that channel adapters render as native widgets. Enables structured
+interactive UI across Telegram, Slack, Discord, and other platforms.
+
+This is a core protocol with no heavy implementations - channel-specific
+rendering belongs in the wrapper (praisonai).
+"""
+
+from __future__ import annotations
+
+from dataclasses import dataclass, field
+from enum import Enum
+from typing import Any, Dict, List, Literal, Optional, Union
+
+
+class ActionType(str, Enum):
+    """Types of actions that can be triggered by interactive elements."""
+    
+    COMMAND = "command"      # Execute a slash command
+    CALLBACK = "callback"     # Opaque callback data for the plugin
+    URL = "url"              # Open a URL
+    WEB_APP = "web_app"      # Open a web app (Telegram mini apps, etc)
+
+
+class ButtonStyle(str, Enum):
+    """Visual styles for buttons."""
+    
+    PRIMARY = "primary"      # Primary action (blue/green)
+    DANGER = "danger"        # Destructive action (red)
+    SECONDARY = "secondary"  # Secondary action (gray)
+    SUCCESS = "success"      # Success action (green)
+    WARNING = "warning"      # Warning action (yellow)
+
+
+class BlockType(str, Enum):
+    """Types of presentation blocks."""
+    
+    TEXT = "text"            # Text content
+    BUTTONS = "buttons"      # Button row/grid
+    SELECT = "select"        # Dropdown/select menu
+    DIVIDER = "divider"      # Visual separator
+    CONTEXT = "context"      # Contextual info (smaller text)
+
+
+@dataclass
+class PresentationAction:
+    """An action triggered by an interactive element.
+    
+    Attributes:
+        type: The action type (command, callback, url, web_app)
+        command: Slash command to execute (for type="command")
+        value: Callback data (for type="callback")
+        url: URL to open (for type="url")
+        web_app_url: Web app URL (for type="web_app")
+    """
+    
+    type: Union[ActionType, str]
+    command: Optional[str] = None
+    value: Optional[str] = None
+    url: Optional[str] = None
+    web_app_url: Optional[str] = None
+    
+    def to_dict(self) -> Dict[str, Any]:
+        """Convert to dictionary for serialization."""
+        data = {"type": self.type.value if isinstance(self.type, ActionType) else self.type}
+        if self.command is not None:
+            data["command"] = self.command
+        if self.value is not None:
+            data["value"] = self.value
+        if self.url is not None:
+            data["url"] = self.url
+        if self.web_app_url is not None:
+            data["web_app_url"] = self.web_app_url
+        return data
+    
+    @classmethod
+    def from_dict(cls, data: Dict[str, Any]) -> "PresentationAction":
+        """Create from dictionary."""
+        return cls(
+            type=data.get("type", "callback"),
+            command=data.get("command"),
+            value=data.get("value"),
+            url=data.get("url"),
+            web_app_url=data.get("web_app_url"),
+        )
+
+
+@dataclass
+class PresentationButton:
+    """A button in an interactive presentation.
+    
+    Attributes:
+        label: Button text label
+        action: Action to trigger when clicked
+        url: Direct URL (alternative to action)
+        priority: Truncation priority (higher survives)
+        style: Visual style
+        disabled: Whether button is disabled
+    """
+    
+    label: str
+    action: Optional[PresentationAction] = None
+    url: Optional[str] = None
+    priority: int = 0
+    style: Optional[Union[ButtonStyle, str]] = None
+    disabled: bool = False
+    
+    def to_dict(self) -> Dict[str, Any]:
+        """Convert to dictionary for serialization."""
+        data = {"label": self.label, "priority": self.priority, "disabled": self.disabled}
+        if self.action is not None:
+            data["action"] = self.action.to_dict()
+        if self.url is not None:
+            data["url"] = self.url
+        if self.style is not None:
+            data["style"] = self.style.value if isinstance(self.style, ButtonStyle) else self.style
+        return data
+    
+    @classmethod
+    def from_dict(cls, data: Dict[str, Any]) -> "PresentationButton":
+        """Create from dictionary."""
+        return cls(
+            label=data.get("label", ""),
+            action=PresentationAction.from_dict(data["action"]) if "action" in data else None,
+            url=data.get("url"),
+            priority=data.get("priority", 0),
+            style=data.get("style"),
+            disabled=data.get("disabled", False),
+        )
+
+
+@dataclass
+class SelectOption:
+    """An option in a select menu.
+    
+    Attributes:
+        label: Option text label
+        value: Option value
+        description: Optional description
+        emoji: Optional emoji icon
+        default: Whether this is the default option
+    """
+    
+    label: str
+    value: str
+    description: Optional[str] = None
+    emoji: Optional[str] = None
+    default: bool = False
+    
+    def to_dict(self) -> Dict[str, Any]:
+        """Convert to dictionary for serialization."""
+        data = {"label": self.label, "value": self.value, "default": self.default}
+        if self.description is not None:
+            data["description"] = self.description
+        if self.emoji is not None:
+            data["emoji"] = self.emoji
+        return data
+    
+    @classmethod
+    def from_dict(cls, data: Dict[str, Any]) -> "SelectOption":
+        """Create from dictionary."""
+        return cls(
+            label=data.get("label", ""),
+            value=data.get("value", ""),
+            description=data.get("description"),
+            emoji=data.get("emoji"),
+            default=data.get("default", False),
+        )
+
+
+@dataclass
+class PresentationBlock:
+    """A block in a message presentation.
+    
+    Blocks are the building blocks of interactive messages.
+    Each block type has specific properties and behavior.
+    """
+    
+    type: Union[BlockType, str]
+    text: Optional[str] = None
+    buttons: Optional[List[PresentationButton]] = None
+    options: Optional[List[SelectOption]] = None
+    placeholder: Optional[str] = None
+    action_id: Optional[str] = None
+    
+    @staticmethod
+    def make_text(content: str, markdown: bool = True) -> "PresentationBlock":
+        """Create a text block."""
+        return PresentationBlock(type=BlockType.TEXT, text=content)
+    
+    @staticmethod
+    def make_buttons(items: List[PresentationButton]) -> "PresentationBlock":
+        """Create a buttons block."""
+        return PresentationBlock(type=BlockType.BUTTONS, buttons=items)
+    
+    @staticmethod
+    def make_select(
+        options: List[SelectOption],
+        placeholder: Optional[str] = None,
+        action_id: Optional[str] = None,
+    ) -> "PresentationBlock":
+        """Create a select menu block."""
+        return PresentationBlock(
+            type=BlockType.SELECT,
+            options=options,
+            placeholder=placeholder,
+            action_id=action_id,
+        )
+    
+    @staticmethod
+    def make_divider() -> "PresentationBlock":
+        """Create a divider block."""
+        return PresentationBlock(type=BlockType.DIVIDER)
+    
+    @staticmethod
+    def make_context(content: str) -> "PresentationBlock":
+        """Create a context block (smaller text)."""
+        return PresentationBlock(type=BlockType.CONTEXT, text=content)
+    
+    def to_dict(self) -> Dict[str, Any]:
+        """Convert to dictionary for serialization."""
+        data = {"type": self.type.value if isinstance(self.type, BlockType) else self.type}
+        if self.text is not None:
+            data["text"] = self.text
+        if self.buttons is not None:
+            data["buttons"] = [b.to_dict() for b in self.buttons]
+        if self.options is not None:
+            data["options"] = [o.to_dict() for o in self.options]
+        if self.placeholder is not None:
+            data["placeholder"] = self.placeholder
+        if self.action_id is not None:
+            data["action_id"] = self.action_id
+        return data
+    
+    @classmethod
+    def from_dict(cls, data: Dict[str, Any]) -> "PresentationBlock":
+        """Create from dictionary."""
+        return cls(
+            type=data.get("type", "text"),
+            text=data.get("text"),
+            buttons=(
+                [PresentationButton.from_dict(b) for b in data["buttons"]]
+                if "buttons" in data else None
+            ),
+            options=(
+                [SelectOption.from_dict(o) for o in data["options"]]
+                if "options" in data else None
+            ),
+            placeholder=data.get("placeholder"),
+            action_id=data.get("action_id"),
+        )
+
+
+@dataclass
+class MessagePresentation:
+    """A complete interactive message presentation.
+    
+    Attributes:
+        blocks: List of presentation blocks
+        tone: Optional tone/style hint for the whole message
+        ephemeral: Whether message should be ephemeral/temporary
+        replace_message_id: ID of message to replace (for updates)
+    """
+    
+    blocks: List[PresentationBlock] = field(default_factory=list)
+    tone: Optional[str] = None
+    ephemeral: bool = False
+    replace_message_id: Optional[str] = None
+    
+    def to_dict(self) -> Dict[str, Any]:
+        """Convert to dictionary for serialization."""
+        data = {"blocks": [b.to_dict() for b in self.blocks], "ephemeral": self.ephemeral}
+        if self.tone is not None:
+            data["tone"] = self.tone
+        if self.replace_message_id is not None:
+            data["replace_message_id"] = self.replace_message_id
+        return data
+    
+    @classmethod
+    def from_dict(cls, data: Dict[str, Any]) -> "MessagePresentation":
+        """Create from dictionary."""
+        return cls(
+            blocks=[PresentationBlock.from_dict(b) for b in data.get("blocks", [])],
+            tone=data.get("tone"),
+            ephemeral=data.get("ephemeral", False),
+            replace_message_id=data.get("replace_message_id"),
+        )
+    
+    @staticmethod
+    def approval(
+        prompt: str,
+        approval_id: str,
+        allow_always: bool = False,
+        context: Optional[str] = None,
+    ) -> "MessagePresentation":
+        """Create a standard approval presentation.
+        
+        Args:
+            prompt: The approval prompt text
+            approval_id: Unique ID for this approval
+            allow_always: Whether to include "Allow Always" option
+            context: Optional context information
+            
+        Returns:
+            A presentation with standard approval buttons
+        """
+        blocks = []
+        
+        # Add prompt
+        blocks.append(PresentationBlock.make_text(prompt))
+        
+        # Add context if provided
+        if context:
+            blocks.append(PresentationBlock.make_context(context))
+        
+        # Create buttons
+        buttons = [
+            PresentationButton(
+                label="Allow Once",
+                action=PresentationAction(
+                    type=ActionType.COMMAND,
+                    command=f"/approve {approval_id} allow-once"
+                ),
+                style=ButtonStyle.PRIMARY,
+                priority=10,
+            ),
+            PresentationButton(
+                label="Deny",
+                action=PresentationAction(
+                    type=ActionType.COMMAND,
+                    command=f"/approve {approval_id} deny"
+                ),
+                style=ButtonStyle.DANGER,
+                priority=9,
+            ),
+        ]
+        
+        if allow_always:
+            buttons.insert(1, PresentationButton(
+                label="Allow Always",
+                action=PresentationAction(
+                    type=ActionType.COMMAND,
+                    command=f"/approve {approval_id} allow-always"
+                ),
+                style=ButtonStyle.SUCCESS,
+                priority=8,
+            ))
+        
+        blocks.append(PresentationBlock.make_buttons(buttons))
+        
+        return MessagePresentation(blocks=blocks)
+
+
+@dataclass
+class PresentationLimits:
+    """Channel-specific limits for presentations.
+    
+    Attributes:
+        max_buttons: Maximum buttons per row/message
+        max_button_rows: Maximum button rows
+        max_button_label: Maximum characters in button label
+        max_options: Maximum options in select menu
+        max_option_label: Maximum characters in option label
+        max_text_length: Maximum text block length
+        supports_markdown: Whether channel supports markdown
+        supports_select: Whether channel supports select menus
+        supports_web_apps: Whether channel supports web apps
+    """
+    
+    max_buttons: int = 10
+    max_button_rows: int = 5
+    max_button_label: int = 50
+    max_options: int = 25
+    max_option_label: int = 50
+    max_text_length: int = 4096
+    supports_markdown: bool = True
+    supports_select: bool = True
+    supports_web_apps: bool = False
+    
+    def to_dict(self) -> Dict[str, Any]:
+        """Convert to dictionary for serialization."""
+        return {
+            "max_buttons": self.max_buttons,
+            "max_button_rows": self.max_button_rows,
+            "max_button_label": self.max_button_label,
+            "max_options": self.max_options,
+            "max_option_label": self.max_option_label,
+            "max_text_length": self.max_text_length,
+            "supports_markdown": self.supports_markdown,
+            "supports_select": self.supports_select,
+            "supports_web_apps": self.supports_web_apps,
+        }
+    
+    @classmethod
+    def from_dict(cls, data: Dict[str, Any]) -> "PresentationLimits":
+        """Create from dictionary."""
+        return cls(
+            max_buttons=data.get("max_buttons", 10),
+            max_button_rows=data.get("max_button_rows", 5),
+            max_button_label=data.get("max_button_label", 50),
+            max_options=data.get("max_options", 25),
+            max_option_label=data.get("max_option_label", 50),
+            max_text_length=data.get("max_text_length", 4096),
+            supports_markdown=data.get("supports_markdown", True),
+            supports_select=data.get("supports_select", True),
+            supports_web_apps=data.get("supports_web_apps", False),
+        )
+    
+    @staticmethod
+    def telegram() -> "PresentationLimits":
+        """Get Telegram-specific limits."""
+        return PresentationLimits(
+            max_buttons=8,
+            max_button_rows=100,
+            max_button_label=64,
+            max_options=0,  # No native select
+            max_text_length=4096,
+            supports_markdown=True,
+            supports_select=False,
+            supports_web_apps=True,
+        )
+    
+    @staticmethod
+    def slack() -> "PresentationLimits":
+        """Get Slack-specific limits."""
+        return PresentationLimits(
+            max_buttons=5,
+            max_button_rows=1,
+            max_button_label=75,
+            max_options=100,
+            max_option_label=75,
+            max_text_length=3000,
+            supports_markdown=True,
+            supports_select=True,
+            supports_web_apps=False,
+        )
+    
+    @staticmethod
+    def discord() -> "PresentationLimits":
+        """Get Discord-specific limits."""
+        return PresentationLimits(
+            max_buttons=25,
+            max_button_rows=5,
+            max_button_label=80,
+            max_options=25,
+            max_option_label=100,
+            max_text_length=2000,
+            supports_markdown=True,
+            supports_select=True,
+            supports_web_apps=False,
+        )
+
+

src/praisonai-agents/praisonaiagents/bots/protocols.py

@@ -22,6 +22,7 @@ from typing import (
     List,
     Optional,
     Protocol,
+    TypedDict,
     Union,
     runtime_checkable,
 )
@@ -30,6 +31,105 @@ if TYPE_CHECKING:
     from ..agent import Agent
 
 
+class ChannelCapabilities(TypedDict, total=False):
+    """Declares what features a bot channel supports.
+    
+    This allows shared engines to adapt behavior based on platform capabilities,
+    enabling graceful degradation when features aren't available.
+    
+    Attributes:
+        live_edit: Whether the channel supports editing messages in place
+        reactions: Whether the channel supports adding reactions to messages
+        typing: Whether the channel supports typing indicators
+        text_limit: Maximum message length (0 = unlimited)
+        edit_rate_limit: Minimum seconds between edits (for throttling)
+        reaction_rate_limit: Minimum seconds between reactions
+    """
+    live_edit: bool
+    reactions: bool
+    typing: bool
+    text_limit: int
+    edit_rate_limit: float
+    reaction_rate_limit: float
+
+
+class RunStatus(Enum):
+    """Run status states for progress feedback.
+    
+    Used by status engines to show agent execution state through
+    reactions or status lines.
+    """
+    QUEUED = "queued"
+    THINKING = "thinking"
+    TOOL = "tool"
+    DONE = "done"
+    ERROR = "error"
+
+
+@dataclass(frozen=True)
+class PlatformCapabilities:
+    """Platform-specific capabilities descriptor for bot adapters.
+    
+    Declares what a messaging platform can do, enabling the shared delivery
+    machinery to apply features like streaming, rate limiting, and chunking
+    uniformly across all platforms.
+    
+    Attributes:
+        max_message_length: Maximum message length in the platform's unit
+        length_unit: Unit for message length ("codepoints" or "utf16")
+        supports_edit: Whether the platform supports in-place message edits (for streaming)
+        supports_typing: Whether the platform supports typing indicators
+        markdown_dialect: Markdown flavor the platform uses (e.g., "markdown", "telegram_markdown_v2")
+        needs_rate_limit: Whether the platform needs rate limiting
+        edit_interval_ms: Minimum milliseconds between message edits (for streaming)
+        max_files_per_message: Maximum number of file attachments per message
+        max_file_size_mb: Maximum file size in megabytes
+        supported_file_types: List of supported file extensions/mime types
+    """
+    
+    max_message_length: int = 4096
+    length_unit: str = "codepoints"  # "codepoints" or "utf16"
+    supports_edit: bool = False
+    supports_typing: bool = True
+    markdown_dialect: str = "markdown"
+    needs_rate_limit: bool = True
+    edit_interval_ms: int = 1000  # Minimum ms between edits
+    max_files_per_message: int = 1
+    max_file_size_mb: int = 10
+    supported_file_types: List[str] = field(default_factory=lambda: ["*"])
+    
+    def to_dict(self) -> Dict[str, Any]:
+        """Convert to dictionary."""
+        return {
+            "max_message_length": self.max_message_length,
+            "length_unit": self.length_unit,
+            "supports_edit": self.supports_edit,
+            "supports_typing": self.supports_typing,
+            "markdown_dialect": self.markdown_dialect,
+            "needs_rate_limit": self.needs_rate_limit,
+            "edit_interval_ms": self.edit_interval_ms,
+            "max_files_per_message": self.max_files_per_message,
+            "max_file_size_mb": self.max_file_size_mb,
+            "supported_file_types": self.supported_file_types,
+        }
+    
+    @classmethod
+    def from_dict(cls, data: Dict[str, Any]) -> "PlatformCapabilities":
+        """Create from dictionary."""
+        return cls(
+            max_message_length=data.get("max_message_length", 4096),
+            length_unit=data.get("length_unit", "codepoints"),
+            supports_edit=data.get("supports_edit", False),
+            supports_typing=data.get("supports_typing", True),
+            markdown_dialect=data.get("markdown_dialect", "markdown"),
+            needs_rate_limit=data.get("needs_rate_limit", True),
+            edit_interval_ms=data.get("edit_interval_ms", 1000),
+            max_files_per_message=data.get("max_files_per_message", 1),
+            max_file_size_mb=data.get("max_file_size_mb", 10),
+            supported_file_types=data.get("supported_file_types", ["*"]),
+        )
+
+
 class MessageType(str, Enum):
     """Types of bot messages."""
     
@@ -318,6 +418,80 @@ class ProbeResult:
         }
 
 
+class HealthReason(Enum):
+    """Reasons for channel health status."""
+    HEALTHY = "healthy"
+    NOT_RUNNING = "not-running"
+    DISCONNECTED = "disconnected"
+    STALE_SOCKET = "stale-socket"
+    STUCK = "stuck"
+    BUSY = "busy"
+    STARTUP_GRACE = "startup-grace"
+    ERROR = "error"
+    
+    @property
+    def is_recoverable(self) -> bool:
+        """Whether this reason indicates a recoverable state."""
+        return self in {
+            HealthReason.DISCONNECTED,
+            HealthReason.STALE_SOCKET,
+            HealthReason.STUCK,
+            HealthReason.ERROR,
+        }
+
+
+def evaluate_channel_health(
+    health: HealthResult,
+    startup_grace_seconds: float = 60.0,
+    stale_after_seconds: float = 120.0,
+    current_time: Optional[float] = None,
+) -> HealthReason:
+    """Evaluate channel health and return a reason.
+    
+    Pure function that evaluates a HealthResult and determines
+    the health reason based on various criteria.
+    
+    Args:
+        health: The health result to evaluate
+        startup_grace_seconds: Grace period for startup
+        stale_after_seconds: Time after which no activity is considered stale
+        current_time: Current timestamp (for testing)
+        
+    Returns:
+        HealthReason indicating the channel's health status
+    """
+    if current_time is None:
+        current_time = time.time()
+    
+    # Not running
+    if not health.is_running:
+        return HealthReason.NOT_RUNNING
+    
+    # Startup grace period
+    if health.uptime_seconds is not None and health.uptime_seconds < startup_grace_seconds:
+        return HealthReason.STARTUP_GRACE
+    
+    # Check for errors
+    if health.error:
+        return HealthReason.ERROR
+    
+    # Check probe result
+    if health.probe and not health.probe.ok:
+        return HealthReason.DISCONNECTED
+    
+    # Check for stale socket (no transport activity)
+    if health.last_activity is not None:
+        time_since_activity = current_time - health.last_activity
+        if time_since_activity > stale_after_seconds:
+            return HealthReason.STALE_SOCKET
+    
+    # Overall health status
+    if not health.ok:
+        return HealthReason.ERROR
+    
+    return HealthReason.HEALTHY
+
+
 @dataclass
 class HealthResult:
     """Detailed health status of a bot.
@@ -331,6 +505,8 @@ class HealthResult:
         sessions: Number of active sessions
         error: Error message (if unhealthy)
         details: Additional platform-specific health details
+        reason: Health status reason (optional)
+        last_activity: Last transport activity timestamp (optional)
     """
     
     ok: bool
@@ -341,6 +517,8 @@ class HealthResult:
     sessions: int = 0
     error: Optional[str] = None
     details: Dict[str, Any] = field(default_factory=dict)
+    reason: Optional[HealthReason] = None
+    last_activity: Optional[float] = None
     
     def to_dict(self) -> Dict[str, Any]:
         """Convert to dictionary."""
@@ -353,6 +531,8 @@ class HealthResult:
             "sessions": self.sessions,
             "error": self.error,
             "details": self.details,
+            "reason": self.reason.value if self.reason else None,
+            "last_activity": self.last_activity,
         }
 
 
@@ -388,6 +568,24 @@ class BotProtocol(Protocol):
         """The bot's user information."""
         ...
     
+    @property
+    def capabilities(self) -> ChannelCapabilities:
+        """Channel capabilities for feature discovery.
+        
+        Returns capabilities that shared engines use to adapt behavior.
+        Channels that don't support a feature should return False for it.
+        """
+        ...
+    
+    @property
+    def platform_capabilities(self) -> PlatformCapabilities:
+        """Platform capabilities descriptor.
+        
+        Returns the platform's capabilities for use by shared delivery code.
+        Adapters should override this to declare their specific capabilities.
+        """
+        ...
+    
     # Lifecycle methods
     async def start(self) -> None:
         """Start the bot (begin receiving messages)."""
@@ -499,6 +697,33 @@ class BotProtocol(Protocol):
         """
         ...
     
+    # Reactions
+    async def add_reaction(self, channel_id: str, message_id: str, emoji: str) -> bool:
+        """Add a reaction emoji to a message.
+        
+        Args:
+            channel_id: Channel containing the message
+            message_id: Message to react to
+            emoji: Emoji to add (Unicode or custom emoji ID)
+            
+        Returns:
+            True if reaction was added successfully
+        """
+        ...
+    
+    async def remove_reaction(self, channel_id: str, message_id: str, emoji: str) -> bool:
+        """Remove a reaction emoji from a message.
+        
+        Args:
+            channel_id: Channel containing the message
+            message_id: Message to remove reaction from
+            emoji: Emoji to remove
+            
+        Returns:
+            True if reaction was removed successfully
+        """
+        ...
+    
     # User/channel info
     async def get_user(self, user_id: str) -> Optional[BotUser]:
         """Get user information.
@@ -613,6 +838,55 @@ class ChatCommandProtocol(Protocol):
         ...
 
 
+# ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
+# SupportsPresentation — interactive UI presentation protocol
+# ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
+
+
+@runtime_checkable
+class SupportsPresentation(Protocol):
+    """Protocol for channel adapters that support presentations.
+    
+    Channel adapters implement this protocol to render
+    portable presentations as native widgets.
+    """
+    
+    @property
+    def presentation_limits(self) -> "PresentationLimits":
+        """Get channel-specific presentation limits."""
+        ...
+    
+    async def render_presentation(
+        self,
+        target: str,
+        presentation: "MessagePresentation",
+    ) -> Optional[str]:
+        """Render a presentation to a target (chat/channel).
+        
+        Args:
+            target: Target identifier (chat_id, channel_id, etc.)
+            presentation: The presentation to render
+            
+        Returns:
+            Message ID if sent successfully, None otherwise
+        """
+        ...
+    
+    def truncate_presentation(
+        self,
+        presentation: "MessagePresentation",
+    ) -> "MessagePresentation":
+        """Truncate a presentation to fit channel limits.
+        
+        Args:
+            presentation: The presentation to truncate
+            
+        Returns:
+            Truncated presentation that fits channel limits
+        """
+        ...
+
+
 # ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
 # EmailProtocol — email-specific bot capabilities
 # ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

src/praisonai-agents/praisonaiagents/compaction/__init__.py

@@ -33,6 +33,10 @@ __all__ = [
     "CompactionStrategy",
     # Results
     "CompactionResult",
+    # Protocols
+    "ToolResultPrunerProtocol",
+    "MessageFormatterProtocol", 
+    "SummaryBuilderProtocol",
 ]
 
 
@@ -54,4 +58,16 @@ def __getattr__(name: str):
         from .result import CompactionResult
         return CompactionResult
     
+    if name == "ToolResultPrunerProtocol":
+        from .protocols import ToolResultPrunerProtocol
+        return ToolResultPrunerProtocol
+    
+    if name == "MessageFormatterProtocol":
+        from .protocols import MessageFormatterProtocol
+        return MessageFormatterProtocol
+    
+    if name == "SummaryBuilderProtocol":
+        from .protocols import SummaryBuilderProtocol
+        return SummaryBuilderProtocol
+    
     raise AttributeError(f"module {__name__!r} has no attribute {name!r}")

src/praisonai-agents/praisonaiagents/compaction/compactor.py

@@ -5,12 +5,13 @@ Manages context window by compacting messages when needed.
 """
 
 import re
-from typing import List, Dict, Any, Optional, Callable, Awaitable
+from typing import List, Dict, Any, Optional, Callable, Awaitable, Tuple
 import asyncio
 
 from .config import CompactionConfig, COMPACTION_PREFIX, SUMMARY_TEMPLATE
 from .strategy import CompactionStrategy
 from .result import CompactionResult
+from .protocols import ToolResultPrunerProtocol, MessageFormatterProtocol, SummaryBuilderProtocol
 
 
 class ContextCompactor:
@@ -34,7 +35,10 @@ class ContextCompactor:
         preserve_system: bool = True,
         preserve_recent: int = 5,
         config: Optional[CompactionConfig] = None,
-        llm_summarize_fn: Optional[Callable[[str], Awaitable[str]]] = None
+        llm_summarize_fn: Optional[Callable[[str], Awaitable[str]]] = None,
+        tool_pruner: Optional[ToolResultPrunerProtocol] = None,
+        message_formatter: Optional[MessageFormatterProtocol] = None,
+        summary_builder: Optional[SummaryBuilderProtocol] = None
     ):
         """
         Initialize the compactor.
@@ -45,30 +49,43 @@ class ContextCompactor:
             strategy: Compaction strategy to use
             preserve_system: Keep system messages
             preserve_recent: Number of recent messages to preserve
-<<<<<<< HEAD
-            config: Optional CompactionConfig to override defaults
+            config: Optional CompactionConfig for advanced settings
             llm_summarize_fn: Async function to call LLM for summarization
+            tool_pruner: Protocol implementation for tool result pruning
+            message_formatter: Protocol implementation for message formatting
+            summary_builder: Protocol implementation for summary building
         """
-        # Initialize config first
-        self.config = config or CompactionConfig()
+        # Use provided config or create default
+        self.config = config or CompactionConfig(
+            max_tokens=max_tokens,
+            target_tokens=target_tokens or int(max_tokens * 0.75),
+            preserve_system=preserve_system,
+            preserve_recent=preserve_recent
+        )
         
-        # Use config values if config provided, otherwise use constructor args
-        if config is not None:
-            self.max_tokens = config.max_tokens
-            self.target_tokens = config.target_tokens
-            self.preserve_system = config.preserve_system
-            self.preserve_recent = config.preserve_recent
-        else:
-            self.max_tokens = max_tokens
-            self.target_tokens = target_tokens or int(max_tokens * 0.75)
-            self.preserve_system = preserve_system
-            self.preserve_recent = preserve_recent
-            
+        # Set instance attributes from config to ensure consistency
+        self.max_tokens = self.config.max_tokens
+        self.target_tokens = self.config.target_tokens
         self.strategy = strategy
+        self.preserve_system = self.config.preserve_system
+        self.preserve_recent = self.config.preserve_recent
         self.llm_summarize_fn = llm_summarize_fn
         
-        # Track previous summaries for iterative update
+        # Protocol implementations (defaults to None - no heavy implementations in core)
+        self.tool_pruner = tool_pruner
+        self.message_formatter = message_formatter  
+        self.summary_builder = summary_builder
+        
+        # Anti-thrashing state tracking
+        self._last_savings_pct: float = 100.0  # Start high to allow first compaction
+        self._low_savings_streak: int = 0
+        
+        # Iterative summary state
         self._previous_summary: Optional[str] = None
+        self._previous_summary_global_idx: int = 0
+        
+        # Reset state tracking for each compact() call
+        self._used_previous_summary: bool = False
     
     def estimate_tokens(self, text: str) -> int:
         """Estimate token count for text."""
@@ -96,12 +113,26 @@ class ContextCompactor:
         return sum(self.count_message_tokens(m) for m in messages)
     
     def needs_compaction(self, messages: List[Dict[str, Any]]) -> bool:
-        """Check if messages need compaction."""
-        return self.count_total_tokens(messages) > self.max_tokens
+        """
+        Check if messages need compaction with anti-thrashing protection.
+        
+        Returns False if:
+        - Token count is below threshold
+        - We've had too many consecutive low-savings attempts
+        """
+        if self.count_total_tokens(messages) <= self.max_tokens:
+            return False
+            
+        # Anti-thrashing: skip if we've had too many low-savings attempts
+        if self._low_savings_streak >= self.config.max_consecutive_low_savings:
+            return False
+            
+        return True
     
     def compact(
         self,
-        messages: List[Dict[str, Any]]
+        messages: List[Dict[str, Any]],
+        focus_topic: str = ""
     ) -> tuple[List[Dict[str, Any]], CompactionResult]:
         """
         Compact messages to fit within token limit (synchronous version).
@@ -111,31 +142,49 @@ class ContextCompactor:
         
         Args:
             messages: List of messages to compact
+            focus_topic: Optional topic to focus on during summarization
             
         Returns:
             Tuple of (compacted messages, result)
         """
+        # Reset state for this compaction call
+        self._used_previous_summary = False
+        
         original_tokens = self.count_total_tokens(messages)
         
         if original_tokens <= self.max_tokens:
-            return messages, CompactionResult(
+            result = CompactionResult(
                 original_tokens=original_tokens,
                 compacted_tokens=original_tokens,
                 messages_removed=0,
                 messages_kept=len(messages),
                 strategy_used=self.strategy
             )
+            result.calculate_savings_pct()
+            return messages, result
+        
+        # Apply tool result deduplication pre-pass if enabled
+        processed_messages = messages
+        tool_results_pruned = 0
+        if self.config.tool_prune_before_summarise and self.tool_pruner:
+            processed_messages, tool_results_pruned = self.tool_pruner.prune(
+                messages, 
+                self.config.max_tool_result_size
+            )
+        
+        # Skip early exit - proceed with full compaction strategy
+        # Anti-thrashing check will be applied after strategy runs
         
         if self.strategy == CompactionStrategy.TRUNCATE:
-            compacted = self._truncate(messages)
+            compacted = self._truncate(processed_messages)
         elif self.strategy == CompactionStrategy.SLIDING:
-            compacted = self._sliding_window(messages)
+            compacted = self._sliding_window(processed_messages)
         elif self.strategy == CompactionStrategy.SUMMARIZE:
-            compacted = self._summarize(messages)
+            compacted = self._summarize(processed_messages)
         elif self.strategy == CompactionStrategy.SMART:
-            compacted = self._smart_compact(messages)
+            compacted = self._smart_compact(processed_messages)
         elif self.strategy == CompactionStrategy.PRUNE:
-            compacted = self._prune(messages)
+            compacted = self._prune(processed_messages)
         elif self.strategy == CompactionStrategy.LLM_SUMMARIZE:
             if self.llm_summarize_fn:
                 # For sync calls with LLM function, we need to run async
@@ -144,17 +193,17 @@ class ContextCompactor:
                     try:
                         loop = asyncio.get_running_loop()
                         # If in async context, fallback to naive summarization
-                        compacted = self._summarize(messages)
+                        compacted = self._summarize(processed_messages)
                     except RuntimeError:
                         # No running loop, safe to create one
-                        compacted = asyncio.run(self._llm_summarize_async(messages))
+                        compacted = asyncio.run(self._llm_summarize_async(processed_messages, focus_topic))
                 except Exception:
                     # Fallback to naive summarization if async fails
-                    compacted = self._summarize(messages)
+                    compacted = self._summarize(processed_messages)
             else:
-                compacted = self._llm_summarize(messages)
+                compacted = self._llm_summarize(processed_messages, focus_topic)
         else:
-            compacted = self._truncate(messages)
+            compacted = self._truncate(processed_messages)
         
         compacted_tokens = self.count_total_tokens(compacted)
         
@@ -163,49 +212,75 @@ class ContextCompactor:
             compacted_tokens=compacted_tokens,
             messages_removed=len(messages) - len(compacted),
             messages_kept=len(compacted),
-            strategy_used=self.strategy
+            strategy_used=self.strategy,
+            tool_results_pruned=tool_results_pruned,
+            previous_summary_reused=getattr(self, '_used_previous_summary', False)
         )
+        result.calculate_savings_pct()
+        
+        # Update anti-thrashing tracking based on actual results
+        self._last_savings_pct = result.savings_pct
+        if result.savings_pct >= self.config.min_savings_pct:
+            self._low_savings_streak = 0
+        else:
+            self._low_savings_streak += 1
         
         return compacted, result
 
     async def compact_async(
         self,
-        messages: List[Dict[str, Any]]
+        messages: List[Dict[str, Any]],
+        focus_topic: str = ""
     ) -> tuple[List[Dict[str, Any]], CompactionResult]:
         """
         Compact messages to fit within token limit (asynchronous version).
         
         Args:
             messages: List of messages to compact
+            focus_topic: Optional topic to focus on during summarization
             
         Returns:
             Tuple of (compacted messages, result)
         """
+        # Reset state for this compaction call
+        self._used_previous_summary = False
+        
         original_tokens = self.count_total_tokens(messages)
         
         if original_tokens <= self.max_tokens:
-            return messages, CompactionResult(
+            result = CompactionResult(
                 original_tokens=original_tokens,
                 compacted_tokens=original_tokens,
                 messages_removed=0,
                 messages_kept=len(messages),
                 strategy_used=self.strategy
             )
+            result.calculate_savings_pct()
+            return messages, result
+        
+        # Apply tool result deduplication pre-pass if enabled
+        processed_messages = messages
+        tool_results_pruned = 0
+        if self.config.tool_prune_before_summarise and self.tool_pruner:
+            processed_messages, tool_results_pruned = self.tool_pruner.prune(
+                messages, 
+                self.config.max_tool_result_size
+            )
         
         if self.strategy == CompactionStrategy.TRUNCATE:
-            compacted = self._truncate(messages)
+            compacted = self._truncate(processed_messages)
         elif self.strategy == CompactionStrategy.SLIDING:
-            compacted = self._sliding_window(messages)
+            compacted = self._sliding_window(processed_messages)
         elif self.strategy == CompactionStrategy.SUMMARIZE:
-            compacted = self._summarize(messages)
+            compacted = self._summarize(processed_messages)
         elif self.strategy == CompactionStrategy.SMART:
-            compacted = self._smart_compact(messages)
+            compacted = self._smart_compact(processed_messages)
         elif self.strategy == CompactionStrategy.PRUNE:
-            compacted = self._prune(messages)
+            compacted = self._prune(processed_messages)
         elif self.strategy == CompactionStrategy.LLM_SUMMARIZE:
-            compacted = await self._llm_summarize_async(messages)
+            compacted = await self._llm_summarize_async(processed_messages, focus_topic)
         else:
-            compacted = self._truncate(messages)
+            compacted = self._truncate(processed_messages)
         
         compacted_tokens = self.count_total_tokens(compacted)
         
@@ -214,11 +289,35 @@ class ContextCompactor:
             compacted_tokens=compacted_tokens,
             messages_removed=len(messages) - len(compacted),
             messages_kept=len(compacted),
-            strategy_used=self.strategy
+            strategy_used=self.strategy,
+            tool_results_pruned=tool_results_pruned,
+            previous_summary_reused=getattr(self, '_used_previous_summary', False)
         )
+        result.calculate_savings_pct()
+        
+        # Update anti-thrashing tracking based on actual results
+        self._last_savings_pct = result.savings_pct
+        if result.savings_pct >= self.config.min_savings_pct:
+            self._low_savings_streak = 0
+        else:
+            self._low_savings_streak += 1
         
         return compacted, result
     
+    def _prune_tool_results(self, messages: List[Dict[str, Any]]) -> Tuple[List[Dict[str, Any]], int]:
+        """
+        Delegate tool result pruning to injected protocol implementation.
+        
+        If no tool pruner is provided, returns messages unchanged.
+        This maintains backward compatibility while enforcing protocol-driven design.
+        
+        Returns:
+            Tuple of (processed messages, number of tool results pruned)
+        """
+        if self.tool_pruner:
+            return self.tool_pruner.prune(messages, self.config.max_tool_result_size)
+        return messages, 0
+    
     def _truncate(self, messages: List[Dict[str, Any]]) -> List[Dict[str, Any]]:
         """Truncate oldest messages."""
         result = []
@@ -360,72 +459,19 @@ class ContextCompactor:
         result.extend(recent)
         return result
     
-    def _llm_summarize(self, messages: List[Dict[str, Any]]) -> List[Dict[str, Any]]:
+    def _llm_summarize(self, messages: List[Dict[str, Any]], focus_topic: str = "") -> List[Dict[str, Any]]:
         """
-        Use LLM to summarize older messages with anti-injection framing.
+        Use LLM to summarize older messages with iterative support.
         
-        Note: This implementation uses structured templates and anti-injection prefixes
-        to prevent the model from treating summarized content as active instructions.
-        """
-        result = []
+        Supports iterative summarization - if we have a previous summary,
+        we only summarize the new messages since that summary.
+        Also includes anti-injection framing when configured.
         
-        # Keep system messages (excluding previous compacted summaries)
-        system_msgs = [
-            m for m in messages 
-            if m.get("role") == "system" and not m.get("_compacted")
-        ]
-        other_msgs = [m for m in messages if m.get("role") != "system"]
-        
-        result.extend(system_msgs)
-        
-        # Keep recent messages
-        recent = other_msgs[-self.preserve_recent:]
-        older = other_msgs[:-self.preserve_recent] if len(other_msgs) > self.preserve_recent else []
-        
-        if older:
-            if self.config.structured_template:
-                structured = self._build_structured_summary(older)
-            else:
-                # Fallback to simple summary
-                summary_parts = []
-                for msg in older:
-                    role = msg.get("role", "unknown")
-                    content = msg.get("content", "")
-                    if isinstance(content, str) and content:
-                        summary_parts.append(f"[{role}]: {content[:150]}...")
-                structured = "\n".join(summary_parts[:10])
-            
-            if structured:
-                # Apply anti-injection prefix
-                prefixed = f"{self.config.compaction_prefix}\n\n{structured}"
-                
-                # Handle iterative update if enabled
-                if self.config.iterative_update and self._previous_summary:
-                    structured = self._merge_summaries(self._previous_summary, structured)
-                    prefixed = f"{self.config.compaction_prefix}\n\n{structured}"
-                
-                # Store for next iteration
-                if self.config.iterative_update:
-                    self._previous_summary = structured
-                
-                result.append({
-                    "role": "system",
-                    "content": prefixed,
-                    "_compacted": True,
-                    "_original_count": len(older),
-                    "_anti_injection": True,
-                })
-        
-        result.extend(recent)
-        return result
-
-    async def _llm_summarize_async(self, messages: List[Dict[str, Any]]) -> List[Dict[str, Any]]:
-        """
-        Use LLM to intelligently summarize older messages.
-        
-        This method invokes the agent's LLM to create a meaningful summary
-        that preserves key facts, identifiers, and the user's intent.
+        Args:
+            messages: List of messages to compact
+            focus_topic: Optional topic to focus on during summarization
         """
+        self._used_previous_summary = False
         result = []
         
         # Keep system messages
@@ -436,33 +482,169 @@ class ContextCompactor:
         
         # Keep recent messages
         recent = other_msgs[-self.preserve_recent:]
-        older = other_msgs[:-self.preserve_recent] if len(other_msgs) > self.preserve_recent else []
+        
+        # Determine what to summarize
+        total_original_messages = len(messages)
+        if (self.config.enable_iterative_summary and 
+            self._previous_summary and 
+            total_original_messages > self._previous_summary_global_idx):
+            # Iterative: summarize only new messages since previous summary
+            # Calculate how many old messages to summarize based on global position
+            messages_since_summary = total_original_messages - self._previous_summary_global_idx
+            new_older_messages = max(0, messages_since_summary - self.preserve_recent)
+            if new_older_messages > 0:
+                to_summarize = other_msgs[-messages_since_summary:-self.preserve_recent]
+            else:
+                to_summarize = []
+            self._used_previous_summary = True
+        else:
+            # Fresh summary: summarize all older messages
+            to_summarize = other_msgs[:-self.preserve_recent] if len(other_msgs) > self.preserve_recent else []
+            self._used_previous_summary = False
+        
+        if to_summarize or self._previous_summary:
+            # Build summary content
+            summary_parts = []
+            
+            # Include previous summary if doing iterative summarization
+            if self._used_previous_summary and self._previous_summary:
+                summary_parts.append(f"[Previous Summary]: {self._previous_summary}")
+                summary_parts.append("[New Activity]:")
+            
+            # Add new messages to summarize
+            for msg in to_summarize:
+                role = msg.get("role", "unknown")
+                content = msg.get("content", "")
+                if isinstance(content, str) and content:
+                    # Extract key information with focus consideration
+                    if focus_topic and focus_topic.lower() in content.lower():
+                        # Prioritize content related to focus topic
+                        summary_parts.append(f"[{role}] *FOCUS*: {content[:200]}...")
+                    else:
+                        summary_parts.append(f"[{role}]: {content[:150]}...")
+            
+            if summary_parts:
+                focus_hint = f"\nFocus on: {focus_topic}" if focus_topic else ""
+                
+                if self._used_previous_summary:
+                    summary = (
+                        f"[Iterative conversation summary - update with new activity{focus_hint}]\n"
+                        + "\n".join(summary_parts[:15])
+                    )
+                else:
+                    summary = (
+                        f"[Compacted conversation history - summarize key points{focus_hint}]\n"
+                        + "\n".join(summary_parts[:10])
+                    )
+                
+                # Apply anti-injection prefix if configured
+                if hasattr(self.config, 'compaction_prefix') and self.config.compaction_prefix:
+                    summary = f"{self.config.compaction_prefix}\n\n{summary}"
+                
+                summary_msg = {
+                    "role": "system",
+                    "content": summary,
+                    "_compacted": True,
+                    "_original_count": len(to_summarize),
+                    "_iterative": self._used_previous_summary,
+                    "_focus_topic": focus_topic
+                }
+                result.append(summary_msg)
+                
+                # Update tracking for future iterative summarization
+                self._previous_summary = summary
+                self._previous_summary_global_idx = len(messages)
+        
+        result.extend(recent)
+        return result
+
+    async def _llm_summarize_async(self, messages: List[Dict[str, Any]], focus_topic: str = "") -> List[Dict[str, Any]]:
+        """
+        Use LLM to intelligently summarize older messages.
+        
+        This method invokes the agent's LLM to create a meaningful summary
+        that preserves key facts, identifiers, and the user's intent.
+        
+        Args:
+            messages: List of messages to compact
+            focus_topic: Optional topic to focus on during summarization
+        """
+        self._used_previous_summary = False
+        result = []
+        
+        # Keep system messages
+        system_msgs = [m for m in messages if m.get("role") == "system"]
+        other_msgs = [m for m in messages if m.get("role") != "system"]
+        
+        result.extend(system_msgs)
+        
+        # Keep recent messages
+        recent = other_msgs[-self.preserve_recent:]
+        
+        # Determine what to summarize based on iterative settings
+        total_original_messages = len(messages)
+        if (self.config.enable_iterative_summary and 
+            self._previous_summary and 
+            total_original_messages > self._previous_summary_global_idx):
+            # Iterative: summarize only new messages since previous summary
+            messages_since_summary = total_original_messages - self._previous_summary_global_idx
+            new_older_messages = max(0, messages_since_summary - self.preserve_recent)
+            if new_older_messages > 0:
+                older = other_msgs[-messages_since_summary:-self.preserve_recent]
+            else:
+                older = []
+            self._used_previous_summary = True
+        else:
+            # Fresh summary: summarize all older messages
+            older = other_msgs[:-self.preserve_recent] if len(other_msgs) > self.preserve_recent else []
+            self._used_previous_summary = False
         
         if older and self.llm_summarize_fn:
             try:
-                # Format messages for summarization
-                history_text = self._format_messages_for_summary(older)
+                # Format messages for summarization using protocol
+                if self.message_formatter:
+                    history_text = self.message_formatter.format_for_summary(older)
+                else:
+                    # Fallback to basic formatting if no protocol implementation
+                    history_text = str(older)
                 
                 # Create summarization prompt that preserves important information
+                focus_hint = f" Focus especially on: {focus_topic}." if focus_topic else ""
+                iterative_hint = ""
+                if self._used_previous_summary and self._previous_summary:
+                    iterative_hint = f"\n\n[Previous Summary]: {self._previous_summary}\n[New Activity to Add]:"
+                
                 prompt = (
                     "Summarise the following conversation history. Preserve verbatim: "
                     "all file paths, IDs, hashes, URLs, task references, error messages, "
                     "tool outputs, and the user's requests. Be concise but complete. "
-                    "Focus on facts and actions taken, not general conversation.\n\n"
-                    f"{history_text}"
+                    f"Focus on facts and actions taken, not general conversation.{focus_hint}"
+                    f"{iterative_hint}\n\n{history_text}"
                 )
                 
                 # Call the LLM for summarization
                 summary = await self.llm_summarize_fn(prompt)
                 
                 # Add the LLM-generated summary as a system message
+                summary_content = summary
+                if self._used_previous_summary:
+                    summary_content = f"[Iterative conversation summary]\n{summary}"
+                else:
+                    summary_content = f"[Previous conversation summary]\n{summary}"
+                
                 result.append({
                     "role": "system",
-                    "content": f"[Previous conversation summary]\n{summary}",
+                    "content": summary_content,
                     "_compacted": True,
                     "_original_count": len(older),
                     "_llm_generated": True,
+                    "_iterative": self._used_previous_summary,
+                    "_focus_topic": focus_topic
                 })
+                
+                # Update tracking for future iterative summarization
+                self._previous_summary = summary
+                self._previous_summary_global_idx = len(messages)
             except Exception as e:
                 # Fallback to naive summarization if LLM call fails
                 import logging
@@ -506,133 +688,41 @@ class ContextCompactor:
                     "content": summary,
                     "_compacted": True,
                     "_original_count": len(older),
+                    "_fallback": True,
                 })
         
         result.extend(recent)
         return result
 
     def _format_messages_for_summary(self, messages: List[Dict[str, Any]]) -> str:
-        """Format messages for LLM summarization."""
-        formatted = []
-        for i, msg in enumerate(messages):
-            role = msg.get("role", "unknown")
-            content = msg.get("content", "")
-            
-            # Handle tool calls
-            if msg.get("tool_calls"):
-                tool_calls = msg.get("tool_calls", [])
-                tool_names = [tc.get("function", {}).get("name", "unknown") for tc in tool_calls]
-                formatted.append(f"{i+1}. {role}: Called tools: {', '.join(tool_names)}")
-            
-            # Handle content
-            if isinstance(content, str) and content.strip():
-                # Truncate very long content but preserve structure
-                if len(content) > 1000:
-                    content = content[:800] + "...[truncated]..." + content[-200:]
-                formatted.append(f"{i+1}. {role}: {content}")
-            elif isinstance(content, list):
-                # Handle multi-part content
-                parts = []
-                for part in content[:3]:  # Limit to first 3 parts
-                    if isinstance(part, dict):
-                        text = part.get("text", "")
-                        if text:
-                            parts.append(text[:200] + "..." if len(text) > 200 else text)
-                if parts:
-                    formatted.append(f"{i+1}. {role}: {' | '.join(parts)}")
-            
-            # Handle tool results with IDs
-            if msg.get("tool_call_id"):
-                tool_id = msg.get("tool_call_id", "")
-                formatted.append(f"{i+1}. {role} (tool {tool_id}): {str(content)[:500]}...")
+        """
+        Delegate message formatting to protocol implementation.
         
-        return "\n".join(formatted)
+        If no formatter is provided, returns basic string representation.
+        """
+        if self.message_formatter:
+            return self.message_formatter.format_for_summary(messages)
+        return str(messages)
     
     def _build_structured_summary(self, messages: List[Dict[str, Any]]) -> str:
         """
-        Build a structured summary using the configured template.
+        Delegate structured summary building to protocol implementation.
         
-        Args:
-            messages: Messages to summarize
-            
-        Returns:
-            Structured summary string
+        If no summary builder is provided, returns basic summary.
         """
-        # Extract information from messages
-        active_task = "No specific task identified"
-        completed = []
-        in_progress = []
-        pending = []
-        files = set()
-        remaining = []
-        
-        for msg in messages:
-            role = msg.get("role", "")
-            content = msg.get("content", "")
-            
-            if not isinstance(content, str):
-                continue
-                
-            content_lower = content.lower()
-            
-            # Extract file paths
-            file_matches = re.findall(r'[\w/\.\-]+\.[a-zA-Z]{1,4}', content)
-            files.update(file_matches[:5])  # Limit to 5 files
-            
-            # Categorize content based on keywords and role
-            content_snippet = content[:200] + ("..." if len(content) > 200 else "")
-            
-            if role == "user":
-                if any(word in content_lower for word in ["please", "can you", "help"]) or re.search(r'\bdo\b', content_lower):
-                    active_task = content_snippet
-                elif "?" in content:
-                    pending.append(content_snippet)
-                    
-            elif role == "assistant":
-                if any(word in content_lower for word in ["completed", "done", "finished"]):
-                    completed.append(content_snippet)
-                elif any(word in content_lower for word in ["working", "processing", "analyzing"]):
-                    in_progress.append(content_snippet)
-                elif any(word in content_lower for word in ["will", "plan to", "next"]):
-                    remaining.append(content_snippet)
-                    
-            elif role == "tool":
-                # Tool results are generally completed actions
-                tool_name = msg.get("name", "unknown")
-                completed.append(f"Tool {tool_name}: {content_snippet}")
-        
-        # Format using template
-        return SUMMARY_TEMPLATE.format(
-            active_task=active_task,
-            completed="\n".join(f"- {item}" for item in completed[:3]) or "None identified",
-            in_progress="\n".join(f"- {item}" for item in in_progress[:3]) or "None identified",
-            pending="\n".join(f"- {item}" for item in pending[:3]) or "None identified",
-            files=", ".join(list(files)[:5]) or "None mentioned",
-            remaining="\n".join(f"- {item}" for item in remaining[:3]) or "None identified"
-        )
+        if self.summary_builder:
+            return self.summary_builder.build_structured_summary(messages)
+        return f"Summary of {len(messages)} messages"
     
     def _merge_summaries(self, previous: str, current: str) -> str:
         """
-        Merge previous summary with current one for iterative updates.
+        Delegate summary merging to protocol implementation.
         
-        Args:
-            previous: Previous summary content
-            current: Current summary content
-            
-        Returns:
-            Merged summary
+        If no summary builder is provided, returns current summary only.
         """
-        # Simple merge strategy: prioritize current but preserve unique info from previous
-        if not previous:
-            return current
-            
-        # Preserve context but avoid excessive growth
-        MAX_PREVIOUS_LENGTH = 500
-        if len(previous) > MAX_PREVIOUS_LENGTH:
-            truncated_previous = previous[:MAX_PREVIOUS_LENGTH]
-            return f"{current}\n\n[Previous context]: {truncated_previous}..."
-        else:
-            return f"{current}\n\n[Previous context]: {previous}"
+        if self.summary_builder:
+            return self.summary_builder.merge_summaries(previous, current)
+        return current
     
     def get_stats(self, messages: List[Dict[str, Any]]) -> Dict[str, Any]:
         """Get statistics about messages."""

src/praisonai-agents/praisonaiagents/compaction/config.py

@@ -50,3 +50,28 @@ class CompactionConfig:
     compaction_prefix: str = COMPACTION_PREFIX  # Override for custom framing
     structured_template: bool = True  # Emit Active Task / Remaining Work sections
     iterative_update: bool = True  # Merge previous summary on re-compaction
+    
+    # Anti-thrashing protection
+    min_savings_pct: float = 10.0  # Skip if projected saving < 10% (0-100 scale)
+    max_consecutive_low_savings: int = 2  # Abort after N low-savings attempts
+    
+    # Tool result optimization
+    tool_prune_before_summarise: bool = True  # Deduplicate tool results before summarization
+    max_tool_result_size: int = 500  # Maximum size for tool results before pruning
+    
+    # Iterative summarization
+    enable_iterative_summary: bool = True  # Build on previous summaries instead of starting from scratch
+    
+    def __post_init__(self):
+        """Validate and normalize configuration values."""
+        # Normalize min_savings_pct to 0-100 scale if provided as ratio
+        if self.min_savings_pct < 1.0:
+            self.min_savings_pct *= 100.0
+        
+        # Validate ranges
+        if not 0.0 <= self.min_savings_pct <= 100.0:
+            raise ValueError("min_savings_pct must be between 0 and 100")
+        if self.max_consecutive_low_savings < 0:
+            raise ValueError("max_consecutive_low_savings must be >= 0")
+        if self.max_tool_result_size <= 0:
+            raise ValueError("max_tool_result_size must be > 0")

src/praisonai-agents/praisonaiagents/compaction/protocols.py

@@ -0,0 +1,73 @@
+"""
+Compaction Protocols for PraisonAI Agents.
+
+Protocol-driven interfaces for context compaction functionality.
+"""
+
+from typing import Protocol, List, Dict, Any, Tuple, Optional
+
+
+class ToolResultPrunerProtocol(Protocol):
+    """Protocol for pruning and deduplicating tool results."""
+    
+    def prune(
+        self,
+        messages: List[Dict[str, Any]],
+        max_tool_result_size: int = 500
+    ) -> Tuple[List[Dict[str, Any]], int]:
+        """
+        Prune and deduplicate tool results to reduce token usage.
+        
+        Args:
+            messages: List of messages to process
+            max_tool_result_size: Maximum size for tool results before truncation
+            
+        Returns:
+            Tuple of (processed messages, number of tool results pruned)
+        """
+        ...
+
+
+class MessageFormatterProtocol(Protocol):
+    """Protocol for formatting messages for summarization."""
+    
+    def format_for_summary(self, messages: List[Dict[str, Any]]) -> str:
+        """
+        Format messages for LLM summarization.
+        
+        Args:
+            messages: Messages to format
+            
+        Returns:
+            Formatted string suitable for summarization
+        """
+        ...
+
+
+class SummaryBuilderProtocol(Protocol):
+    """Protocol for building structured summaries."""
+    
+    def build_structured_summary(self, messages: List[Dict[str, Any]]) -> str:
+        """
+        Build a structured summary from messages.
+        
+        Args:
+            messages: Messages to summarize
+            
+        Returns:
+            Structured summary string
+        """
+        ...
+    
+    def merge_summaries(self, previous: str, current: str) -> str:
+        """
+        Merge previous summary with current one for iterative updates.
+        
+        Args:
+            previous: Previous summary content
+            current: Current summary content
+            
+        Returns:
+            Merged summary
+        """
+        ...

src/praisonai-agents/praisonaiagents/compaction/result.py

@@ -18,6 +18,16 @@ class CompactionResult:
     strategy_used: CompactionStrategy
     summary: str = ""
     
+    # Anti-thrashing and optimization info
+    savings_pct: float = field(default=0.0, init=False)  # Percentage of tokens saved (computed)
+    tool_results_pruned: int = 0  # Number of tool results deduplicated/pruned
+    previous_summary_reused: bool = False  # Whether iterative summary was used
+    was_skipped_due_to_low_savings: bool = False  # Whether compaction was skipped due to anti-thrashing
+    
+    def __post_init__(self):
+        """Initialize computed fields after construction."""
+        self.calculate_savings_pct()
+    
     @property
     def tokens_saved(self) -> int:
         """Get number of tokens saved."""
@@ -30,6 +40,13 @@ class CompactionResult:
             return 0.0
         return self.compacted_tokens / self.original_tokens
     
+    def calculate_savings_pct(self) -> None:
+        """Calculate and set the savings percentage."""
+        if self.original_tokens > 0:
+            self.savings_pct = (self.tokens_saved / self.original_tokens) * 100.0
+        else:
+            self.savings_pct = 0.0
+    
     @property
     def was_compacted(self) -> bool:
         """Check if compaction occurred."""
@@ -45,5 +62,9 @@ class CompactionResult:
             "messages_kept": self.messages_kept,
             "strategy_used": self.strategy_used.value,
             "compression_ratio": self.compression_ratio,
+            "savings_pct": self.savings_pct,
+            "tool_results_pruned": self.tool_results_pruned,
+            "previous_summary_reused": self.previous_summary_reused,
+            "was_skipped_due_to_low_savings": self.was_skipped_due_to_low_savings,
             "summary": self.summary
         }

src/praisonai-agents/praisonaiagents/config/feature_configs.py

@@ -774,29 +774,39 @@ class ExecutionConfig:
                 self.context_compaction
             )
         
-        # Emit deprecation warning for default behavior change
-        # Only warn if context_compaction was not explicitly set (i.e., using the default False)
-        import warnings
-        import inspect
-        frame = inspect.currentframe()
-        try:
-            # Check if this is being called from user code (not internal)
-            caller_frame = frame.f_back
-            if (caller_frame and 
-                not any(path_part in caller_frame.f_code.co_filename 
-                       for path_part in ['praisonaiagents', 'test_', '__pycache__'])):
-                # This is being called from user code
-                if self.context_compaction is False:
-                    warnings.warn(
-                        "ExecutionConfig.context_compaction will default to True in the next "
-                        "release for proactive context overflow protection. To disable, explicitly "
-                        "set context_compaction=False. To use the new default early, set "
-                        "context_compaction=True.",
-                        DeprecationWarning,
-                        stacklevel=3
-                    )
-        finally:
-            del frame
+        # Emit deprecation warning once per process for default behavior change.
+        # Walk the stack once — dataclass __init__ uses caller filename "<string>".
+        if self.context_compaction is False:
+            if getattr(ExecutionConfig, '_context_compaction_internal', False):
+                return
+            if getattr(ExecutionConfig, '_context_compaction_warned', False):
+                return
+            import warnings
+            import inspect
+            _INTERNAL = ('praisonaiagents', 'test_', '__pycache__')
+            frame = inspect.currentframe()
+            try:
+                caller = frame.f_back if frame else None
+                is_internal = False
+                while caller is not None:
+                    if any(p in caller.f_code.co_filename for p in _INTERNAL):
+                        is_internal = True
+                        break
+                    caller = caller.f_back
+                if is_internal:
+                    ExecutionConfig._context_compaction_internal = True
+                    return
+                warnings.warn(
+                    "ExecutionConfig.context_compaction will default to True in the next "
+                    "release for proactive context overflow protection. To disable, explicitly "
+                    "set context_compaction=False. To use the new default early, set "
+                    "context_compaction=True.",
+                    DeprecationWarning,
+                    stacklevel=3,
+                )
+                ExecutionConfig._context_compaction_warned = True
+            finally:
+                del frame
 
     def to_dict(self) -> Dict[str, Any]:
         """Convert to dictionary."""
@@ -1089,8 +1099,8 @@ class MultiAgentOutputConfig:
     # Verbosity level (0=silent, 1=minimal, 2+=verbose)
     verbose: int = 0
     
-    # Streaming output
-    stream: bool = True
+    # Streaming output - False by default for sync multi-agent compatibility
+    stream: bool = False
     
     def to_dict(self) -> Dict[str, Any]:
         """Convert to dictionary."""
@@ -1441,39 +1451,6 @@ def resolve_web(value: WebParam) -> Optional[WebConfig]:
     return value
 
 
-def resolve_output(value: OutputParam) -> Optional[OutputConfig]:
-    """Resolve output= parameter following precedence ladder."""
-    if value is None:
-        return None
-    if isinstance(value, str):
-        try:
-            preset = OutputPreset(value.lower())
-            return OutputConfig.from_preset(preset)
-        except ValueError:
-            return None
-    if isinstance(value, dict):
-        return OutputConfig(**value)
-    if isinstance(value, OutputConfig):
-        return value
-    return value
-
-
-def resolve_execution(value: ExecutionParam) -> Optional[ExecutionConfig]:
-    """Resolve execution= parameter following precedence ladder."""
-    if value is None:
-        return None
-    if isinstance(value, str):
-        try:
-            preset = ExecutionPreset(value.lower())
-            return ExecutionConfig.from_preset(preset)
-        except ValueError:
-            return None
-    if isinstance(value, dict):
-        return ExecutionConfig(**value)
-    if isinstance(value, ExecutionConfig):
-        return value
-    return value
-
 
 def resolve_caching(value: CachingParam) -> Optional[CachingConfig]:
     """Resolve caching= parameter following precedence ladder."""
@@ -1585,8 +1562,6 @@ __all__ = [
     "resolve_reflection",
     "resolve_guardrails",
     "resolve_web",
-    "resolve_output",
-    "resolve_execution",
     "resolve_caching",
     "resolve_autonomy",
     "resolve_tool_search",

src/praisonai-agents/praisonaiagents/config/loader.py

@@ -83,6 +83,7 @@ class ConfigValidationError(Exception):
 # Global config cache (lazy loaded)
 _config_cache: Optional[Dict[str, Any]] = None
 _config_loaded: bool = False
+_defaults_has_values: Optional[bool] = None
 
 
 def _default_project_plugins_dir():
@@ -418,11 +419,27 @@ def get_enabled_plugins() -> Optional[List[str]]:
     return None  # All plugins enabled
 
 
+def _defaults_has_any_values() -> bool:
+    """Return True if config file defines any defaults (cached after first check)."""
+    global _defaults_has_values
+    if _defaults_has_values is None:
+        defaults = get_defaults_config()
+        _defaults_has_values = any(
+            getattr(defaults, key, None) is not None
+            for key in (
+                "model", "base_url", "memory", "knowledge", "planning",
+                "reflection", "web", "output", "execution", "caching", "autonomy",
+            )
+        )
+    return _defaults_has_values
+
+
 def clear_config_cache() -> None:
     """Clear the config cache (for testing)."""
-    global _config_cache, _config_loaded
+    global _config_cache, _config_loaded, _defaults_has_values
     _config_cache = None
     _config_loaded = False
+    _defaults_has_values = None
 
 
 def validate_config(config: Dict[str, Any], raise_on_error: bool = False) -> List[str]:
@@ -603,6 +620,8 @@ def apply_config_defaults(
     if explicit_value is not None:
         # If True and we have config defaults, merge them
         if explicit_value is True:
+            if not _defaults_has_any_values():
+                return explicit_value
             config_defaults = get_default(param_name)
             if config_defaults and isinstance(config_defaults, dict):
                 if config_class:
@@ -612,6 +631,10 @@ def apply_config_defaults(
                 return config_defaults
         return explicit_value
     
+    # Fast path: no config defaults file values — skip lookups
+    if not _defaults_has_any_values():
+        return None
+    
     # Check if config has defaults for this param
     config_defaults = get_default(param_name)
     if config_defaults is None:

src/praisonai-agents/praisonaiagents/config/presets.py

@@ -322,8 +322,8 @@ CACHING_PRESETS: Dict[str, Dict[str, Any]] = {
 # =============================================================================
 
 MULTI_AGENT_OUTPUT_PRESETS: Dict[str, Dict[str, Any]] = {
-    "verbose": {"verbose": 2, "stream": True},
-    "minimal": {"verbose": 1, "stream": True},
+    "verbose": {"verbose": 2, "stream": False},
+    "minimal": {"verbose": 1, "stream": False},
     "silent": {"verbose": 0, "stream": False},
 }
 

src/praisonai-agents/praisonaiagents/context/manager.py

@@ -94,65 +94,6 @@ class SessionDeduplicationCache:
             self._cache.clear()
             self._stats = {"duplicates_prevented": 0, "tokens_saved": 0}
 
-def deduplicate_topics(topics: list, key: str = "title", similarity_threshold: float = 0.8) -> list:
-    """
-    Programmatic deduplication of topics/items before agent processing.
-    
-    This helps prevent duplicate content from being passed to downstream agents,
-    reducing token waste and improving quality.
-    
-    Args:
-        topics: List of topic dicts or strings
-        key: Key to use for comparison if topics are dicts (default: "title")
-        similarity_threshold: Similarity threshold for fuzzy matching (0.0-1.0)
-        
-    Returns:
-        Deduplicated list of topics
-    """
-    if not topics:
-        return topics
-    
-    seen_hashes = set()
-    seen_normalized = set()
-    unique_topics = []
-    
-    for topic in topics:
-        # Get the content to compare
-        if isinstance(topic, dict):
-            content = str(topic.get(key, topic.get("content", str(topic))))
-        else:
-            content = str(topic)
-        
-        # Normalize for comparison
-        normalized = content.lower().strip()
-        # Remove common words for better matching
-        normalized = " ".join(w for w in normalized.split() if len(w) > 3)
-        
-        # Check exact hash match
-        content_hash = hashlib.sha256(normalized.encode()).hexdigest()
-        if content_hash in seen_hashes:
-            continue
-        
-        # Check fuzzy match using simple word overlap
-        is_duplicate = False
-        for seen in seen_normalized:
-            # Calculate Jaccard similarity
-            words1 = set(normalized.split())
-            words2 = set(seen.split())
-            if words1 and words2:
-                intersection = len(words1 & words2)
-                union = len(words1 | words2)
-                similarity = intersection / union if union > 0 else 0
-                if similarity >= similarity_threshold:
-                    is_duplicate = True
-                    break
-        
-        if not is_duplicate:
-            seen_hashes.add(content_hash)
-            seen_normalized.add(normalized)
-            unique_topics.append(topic)
-    
-    return unique_topics
 
 class EstimationMode(str, Enum):
     """Token estimation modes."""

src/praisonai-agents/praisonaiagents/gateway/protocols.py

@@ -30,6 +30,7 @@ from typing import (
 if TYPE_CHECKING:
     from praisonai.gateway.pairing import PairedChannel
     from ..agent import Agent
+    from ..bots.presentation import MessagePresentation
 
 
 class EventType(str, Enum):
@@ -53,6 +54,7 @@ class EventType(str, Enum):
     # Message events
     MESSAGE = "message"
     MESSAGE_ACK = "message_ack"
+    MESSAGE_ABORT = "message_abort"
     TYPING = "typing"
     
     # Streaming events (relayed from agent's StreamEventEmitter)
@@ -148,6 +150,7 @@ class GatewayMessage:
         timestamp: Message creation time
         metadata: Additional message metadata
         reply_to: ID of message being replied to (optional)
+        presentation: Optional interactive presentation (buttons, menus, etc.)
     """
     
     content: Union[str, Dict[str, Any]]
@@ -157,10 +160,11 @@ class GatewayMessage:
     timestamp: float = field(default_factory=time.time)
     metadata: Dict[str, Any] = field(default_factory=dict)
     reply_to: Optional[str] = None
+    presentation: Optional["MessagePresentation"] = None
     
     def to_dict(self) -> Dict[str, Any]:
         """Convert to dictionary for serialization."""
-        return {
+        data = {
             "content": self.content,
             "sender_id": self.sender_id,
             "session_id": self.session_id,
@@ -169,10 +173,20 @@ class GatewayMessage:
             "metadata": self.metadata,
             "reply_to": self.reply_to,
         }
+        if self.presentation is not None:
+            data["presentation"] = self.presentation.to_dict()
+        return data
     
     @classmethod
     def from_dict(cls, data: Dict[str, Any]) -> "GatewayMessage":
         """Create from dictionary."""
+        from ..bots.presentation import MessagePresentation
+        
+        presentation = None
+        raw_presentation = data.get("presentation")
+        if isinstance(raw_presentation, dict):
+            presentation = MessagePresentation.from_dict(raw_presentation)
+        
         return cls(
             content=data.get("content", ""),
             sender_id=data.get("sender_id", "unknown"),
@@ -181,6 +195,7 @@ class GatewayMessage:
             timestamp=data.get("timestamp", time.time()),
             metadata=data.get("metadata", {}),
             reply_to=data.get("reply_to"),
+            presentation=presentation,
         )
 
 

src/praisonai-agents/praisonaiagents/hooks/runner.py

@@ -83,7 +83,8 @@ class HookRunner:
         self,
         event: HookEvent,
         input_data: HookInput,
-        target: Optional[str] = None
+        target: Optional[str] = None,
+        _hooks: Optional[List["HookDefinition"]] = None
     ) -> List[HookExecutionResult]:
         """
         Execute all hooks for an event.
@@ -92,11 +93,12 @@ class HookRunner:
             event: The event to execute hooks for
             input_data: Input data for the hooks
             target: Optional target to filter hooks (e.g., tool name)
+            _hooks: Internal parameter to avoid duplicate get_hooks() calls
             
         Returns:
             List of execution results
         """
-        hooks = self._registry.get_hooks(event, target)
+        hooks = _hooks if _hooks is not None else self._registry.get_hooks(event, target)
         
         if not hooks:
             return []
@@ -153,8 +155,14 @@ class HookRunner:
                 "Use 'await runner.execute(event, input_data, target)' instead in async contexts."
             )
 
-        # No running loop — safe to create one
-        return asyncio.run(self.execute(event, input_data, target))
+        # Fast path: no hooks → no loop creation needed
+        # This mirrors the same check in execute() but avoids event loop creation overhead
+        hooks = self._registry.get_hooks(event, target)
+        if not hooks:
+            return []
+
+        # No running loop and hooks exist — safe to create one
+        return asyncio.run(self.execute(event, input_data, target, _hooks=hooks))
     
     async def _execute_parallel(
         self,

src/praisonai-agents/praisonaiagents/llm/llm.py

@@ -24,6 +24,7 @@ import xml.etree.ElementTree as ET
 from ..errors import AgentErrorKind, FailoverDecision, IdleTimeoutBreaker
 # Gap 2: Tool call execution imports
 from ..tools.call_executor import ToolCall, create_tool_call_executor
+from ..tools.schema import annotation_to_json_schema, get_parameter_requirements
 # Display functions - lazy loaded to avoid importing rich at startup
 # These are only needed when output=verbose
 _display_module = None
@@ -5749,8 +5750,6 @@ Output MUST be JSON with 'reflection' and 'satisfactory'.
                         if content:
                             response_text += content
                             live.update(_get_display_functions()['display_generating'](response_text, start_time))
-                        if content:
-                            response_text += content
             else:
                 # Use retry wrapper for non-streaming calls
                 response = self._completion_with_retry(**completion_params)
@@ -5846,8 +5845,6 @@ Output MUST be JSON with 'reflection' and 'satisfactory'.
                         if content:
                             response_text += content
                             live.update(_get_display_functions()['display_generating'](response_text, start_time))
-                        if content:
-                            response_text += content
             else:
                 # Use retry wrapper for non-streaming async calls
                 response = await self._acompletion_with_retry(**completion_params)
@@ -5886,34 +5883,74 @@ Output MUST be JSON with 'reflection' and 'satisfactory'.
             function_name = function_or_name
             logging.debug(f"Attempting to generate tool definition for: {function_name}")
             
-            # First try to get the tool definition if it exists
-            tool_def_name = f"{function_name}_definition"
-            tool_def = globals().get(tool_def_name)
-            logging.debug(f"Looking for {tool_def_name} in globals: {tool_def is not None}")
-            
-            if not tool_def:
-                import __main__
-                tool_def = getattr(__main__, tool_def_name, None)
-                logging.debug(f"Looking for {tool_def_name} in __main__: {tool_def is not None}")
-            
-            if tool_def:
-                logging.debug(f"Found tool definition: {tool_def}")
-                return tool_def
-
-            # Try to find the function
-            func = globals().get(function_name)
-            logging.debug(f"Looking for {function_name} in globals: {func is not None}")
-            
-            if not func:
-                import __main__
-                func = getattr(__main__, function_name, None)
-                logging.debug(f"Looking for {function_name} in __main__: {func is not None}")
-            
-            if not func or not callable(func):
-                logging.debug(f"Function {function_name} not found or not callable")
-                return None
+            # First try to get from the tool registry (preferred method)
+            try:
+                from ..tools.registry import get_registry
+                registry = get_registry()
+                tool = registry.get(function_name)
+                if tool:
+                    logging.debug(f"Found tool in registry: {function_name}")
+                    # If it's a BaseTool, get its schema
+                    if hasattr(tool, 'get_schema'):
+                        tool_def = tool.get_schema()
+                        # Apply same normalization as the callable path
+                        if (
+                            isinstance(tool_def, dict)
+                            and isinstance(tool_def.get("function"), dict)
+                            and isinstance(tool_def["function"].get("parameters"), dict)
+                        ):
+                            tool_def = tool_def.copy()
+                            tool_def["function"] = tool_def["function"].copy()
+                            tool_def["function"]["parameters"] = self._fix_array_schemas(
+                                tool_def["function"]["parameters"]
+                            )
+                        return tool_def
+                    # If it's a callable, use it as func
+                    if callable(tool):
+                        func = tool
+                    else:
+                        logging.debug(f"Tool {function_name} in registry is not callable")
+                        return None
+                else:
+                    logging.debug(f"Tool {function_name} not found in registry, falling back to globals/__main__")
+                    # Fall back to globals and __main__ for backward compatibility
+                    tool_def_name = f"{function_name}_definition"
+                    tool_def = globals().get(tool_def_name)
+                    if not tool_def:
+                        import __main__
+                        tool_def = getattr(__main__, tool_def_name, None)
+                    if tool_def:
+                        return tool_def
+                    
+                    func = globals().get(function_name)
+                    if not func:
+                        import __main__
+                        func = getattr(__main__, function_name, None)
+                    if not func or not callable(func):
+                        logging.debug(f"Function {function_name} not found or not callable")
+                        return None
+            except ImportError:
+                logging.debug("Tool registry not available, falling back to globals/__main__")
+                # Fall back to globals and __main__ when registry unavailable
+                tool_def_name = f"{function_name}_definition"
+                tool_def = globals().get(tool_def_name)
+                if not tool_def:
+                    import __main__
+                    tool_def = getattr(__main__, tool_def_name, None)
+                if tool_def:
+                    return tool_def
+                
+                func = globals().get(function_name)
+                if not func:
+                    import __main__
+                    func = getattr(__main__, function_name, None)
+                if not func or not callable(func):
+                    logging.debug(f"Function {function_name} not found or not callable")
+                    return None
 
         import inspect
+        from typing import get_type_hints
+        
         # Handle Langchain and CrewAI tools
         if inspect.isclass(func) and hasattr(func, 'run') and not hasattr(func, '_run'):
             original_func = func
@@ -5961,26 +5998,26 @@ Output MUST be JSON with 'reflection' and 'satisfactory'.
         
         logging.debug(f"Parameter descriptions: {param_descriptions}")
 
+        # Get type hints for proper schema generation
+        try:
+            hints = get_type_hints(func) if getattr(func, "__annotations__", None) else {}
+        except (NameError, TypeError, AttributeError):
+            hints = getattr(func, "__annotations__", {}) or {}
+
         for name, param in parameters_list:
-            param_type = "string"  # Default type
-            if param.annotation != inspect.Parameter.empty:
-                if param.annotation == int:
-                    param_type = "integer"
-                elif param.annotation == float:
-                    param_type = "number"
-                elif param.annotation == bool:
-                    param_type = "boolean"
-                elif param.annotation == list:
-                    param_type = "array"
-                elif param.annotation == dict:
-                    param_type = "object"
+            # Get type annotation
+            param_type = hints.get(name, param.annotation if param.annotation != inspect.Parameter.empty else str)
             
-            parameters["properties"][name] = {
-                "type": param_type,
-                "description": param_descriptions.get(name, "Parameter description not available")
-            }
+            # Use new schema utility for proper type handling
+            prop_schema = annotation_to_json_schema(param_type)
             
-            if param.default == inspect.Parameter.empty:
+            # Add description from docstring
+            prop_schema["description"] = param_descriptions.get(name, "Parameter description not available")
+            
+            parameters["properties"][name] = prop_schema
+            
+            # Check if required using improved logic
+            if get_parameter_requirements(sig, name):
                 parameters["required"].append(name)
         
         logging.debug(f"Generated parameters: {parameters}")

src/praisonai-agents/praisonaiagents/llm/unified_adapters.py

@@ -141,22 +141,6 @@ class LiteLLMAdapter:
         
         return self._convert_response_to_standard_format(response)
     
-    def _convert_messages_to_prompt(self, messages: List[Dict[str, Any]]) -> str:
-        """Convert OpenAI-style messages to prompt string."""
-        if not messages:
-            return ""
-        
-        # If single message, return its content
-        if len(messages) == 1:
-            return messages[0].get('content', '')
-        
-        # For multiple messages, use the last user message as prompt
-        for msg in reversed(messages):
-            if msg.get('role') == 'user':
-                return msg.get('content', '')
-        
-        return messages[-1].get('content', '') if messages else ''
-    
     async def _convert_stream_response(self, response_stream) -> AsyncIterator[Dict[str, Any]]:
         """Convert LLM stream response to standard format."""
         # Implementation depends on the actual stream format from LLM.get_response_async

src/praisonai-agents/praisonaiagents/mcp/mcp_security.py

@@ -246,3 +246,74 @@ class SecurityConfig:
     def get_bind_address(self) -> str:
         """Get recommended bind address based on config."""
         return "127.0.0.1" if self.bind_localhost_only else "0.0.0.0"
+
+
+def load_sse_security_from_env():
+    """Load optional SSE security settings from environment."""
+    import os
+
+    token = os.environ.get("MCP_SSE_AUTH_TOKEN") or os.environ.get("MCP_AUTH_TOKEN")
+    origins_raw = os.environ.get("MCP_SSE_ALLOWED_ORIGINS")
+    if not token and not origins_raw:
+        return None, None
+
+    origins = (
+        [origin.strip() for origin in origins_raw.split(",") if origin.strip()]
+        if origins_raw
+        else None
+    )
+    config = SecurityConfig(
+        require_auth=bool(token),
+        validate_origin=origins is not None,
+        allowed_origins=origins or SecurityConfig().allowed_origins,
+    )
+    return config, token
+
+
+def build_sse_security_app(app, security: Optional["SecurityConfig"] = None):
+    """Wrap a Starlette app with SSE security middleware when configured."""
+    config = security
+    token = None
+    if config is None:
+        config, token = load_sse_security_from_env()
+    elif config.require_auth:
+        import os
+
+        token = os.environ.get("MCP_SSE_AUTH_TOKEN") or os.environ.get("MCP_AUTH_TOKEN")
+    if config is None or (not config.require_auth and not config.validate_origin):
+        return app
+
+    class _SSESecurityMiddleware:
+        def __init__(self, inner, sec: SecurityConfig, expected_token: Optional[str]):
+            self._inner = inner
+            self._sec = sec
+            self._token = expected_token
+
+        async def __call__(self, scope, receive, send):
+            if scope.get("type") != "http":
+                await self._inner(scope, receive, send)
+                return
+
+            headers = {k.decode().lower(): v.decode() for k, v in scope.get("headers", [])}
+
+            if self._sec.require_auth and self._token:
+                auth = headers.get("authorization", "")
+                if not auth.startswith("Bearer ") or auth[7:] != self._token:
+                    from starlette.responses import JSONResponse
+
+                    response = JSONResponse({"error": "Unauthorized"}, status_code=401)
+                    await response(scope, receive, send)
+                    return
+
+            if self._sec.validate_origin:
+                origin = headers.get("origin") or None
+                if not self._sec.is_origin_allowed(origin):
+                    from starlette.responses import JSONResponse
+
+                    response = JSONResponse({"error": "Origin not allowed"}, status_code=403)
+                    await response(scope, receive, send)
+                    return
+
+            await self._inner(scope, receive, send)
+
+    return _SSESecurityMiddleware(app, config, token)

src/praisonai-agents/praisonaiagents/mcp/mcp_server.py

@@ -242,12 +242,18 @@ class ToolsMCPServer:
         
         mcp.run()
     
-    def run_sse(self, host: str = "0.0.0.0", port: int = 8080) -> None:
+    def run_sse(
+        self,
+        host: str = "0.0.0.0",
+        port: int = 8080,
+        security: "Optional[SecurityConfig]" = None,
+    ) -> None:
         """Run the MCP server using SSE transport.
         
         Args:
             host: Host to bind to
             port: Port to listen on
+            security: Optional security config; when unset, reads MCP_SSE_* env vars
         """
         try:
             import uvicorn
@@ -260,6 +266,8 @@ class ToolsMCPServer:
                 f"SSE dependencies not available: {e}. "
                 "Install with: pip install uvicorn starlette"
             )
+
+        from .mcp_security import SecurityConfig, build_sse_security_app
         
         mcp = self.get_fastmcp()
         
@@ -286,7 +294,8 @@ class ToolsMCPServer:
                 Mount(messages_path, app=sse_transport.handle_post_message),
             ]
         )
-        
+
+        app = build_sse_security_app(app, security)
         print(f"🚀 Starting MCP server '{self.name}' with SSE transport")
         print(f"📡 SSE endpoint: http://{host}:{port}{sse_path}")
         print(f"🛠️  Available tools: {', '.join(self.get_tool_names())}")

src/praisonai-agents/praisonaiagents/memory/file_memory.py

@@ -115,6 +115,16 @@ class FileMemory:
         "importance_threshold": 0.7,   # Min importance for long-term
         "auto_promote": True,          # Auto-promote important short-term to long-term
     }
+
+    @staticmethod
+    def _sanitise_user_id(user_id: str) -> str:
+        """Reject path traversal in user_id before using it as a directory name."""
+        if not user_id or not isinstance(user_id, str):
+            return "default"
+        if ".." in user_id or "/" in user_id or "\\" in user_id:
+            raise ValueError("user_id must not contain path separators or parent references")
+        safe = user_id.strip()
+        return safe or "default"
     
     def __init__(
         self,
@@ -132,7 +142,7 @@ class FileMemory:
             config: Configuration overrides
             verbose: Verbosity level (0=quiet, 1=info, 2+=debug)
         """
-        self.user_id = user_id
+        self.user_id = self._sanitise_user_id(user_id)
         self.verbose = verbose
         
         # Set up paths
@@ -142,7 +152,7 @@ class FileMemory:
             from ..paths import get_project_data_dir
             self.base_path = get_project_data_dir() / "memory"
         
-        self.user_path = self.base_path / user_id
+        self.user_path = self.base_path / self.user_id
         self.episodic_path = self.user_path / "episodic"
         
         # Create directories

src/praisonai-agents/praisonaiagents/memory/memory.py

@@ -29,6 +29,11 @@ logger = get_logger(__name__, extra_data={"subsystem": "memory"})
 TRACE_LEVEL = 5
 logging.addLevelName(TRACE_LEVEL, 'TRACE')
 
+# Cache boundary constants for prompt prefix caching optimization
+# NOTE: This is a placeholder - current implementation does not provide
+# functional prompt caching as it requires structured API metadata
+CACHE_BOUNDARY = ""
+
 
 
 class Memory(StorageMixin, SearchMixin, MemoryCoreMixin):
@@ -1704,6 +1709,41 @@ class Memory(StorageMixin, SearchMixin, MemoryCoreMixin):
         entities = self.search_entity(q, limit=max_items)
         user_mem = self.search_user_memory(user_id, q, limit=max_items) if user_id else []
 
+        # Apply stable sorting to ensure deterministic order for prompt caching
+        # Sort by timestamp descending, then by content hash for stable ordering
+        def _sort_memory_results(results: List[Any]) -> List[Any]:
+            """Stable sort so identical query sets produce identical context strings."""
+            import hashlib
+            if not results:
+                return results
+            
+            def sort_key(r):
+                if not isinstance(r, dict):
+                    return (0.0, hashlib.sha256(str(r).encode()).hexdigest())
+                
+                # Prefer created_at over timestamp for better determinism
+                timestamp = r.get("created_at") or r.get("timestamp") or 0
+                if isinstance(timestamp, str):
+                    try:
+                        from datetime import datetime
+                        timestamp = datetime.fromisoformat(timestamp.replace("Z", "+00:00")).timestamp()
+                    except ValueError:
+                        timestamp = 0.0
+                timestamp = -(float(timestamp))  # Negative for descending order
+                
+                # Use full content hash for true deterministic ordering
+                content = r.get("text", "") if isinstance(r, dict) else str(r)
+                content_hash = hashlib.sha256(content.encode()).hexdigest()
+                return (timestamp, content_hash)
+            
+            return sorted(results, key=sort_key)
+
+        # Apply stable sorting to all memory results
+        short_term = _sort_memory_results(short_term)
+        long_term = _sort_memory_results(long_term)
+        entities = _sort_memory_results(entities)
+        user_mem = _sort_memory_results(user_mem)
+
         # Add sections in order of priority
         add_section("Short-term Memory Context", short_term)
         add_section("Long-term Memory Context", long_term)
@@ -1713,6 +1753,51 @@ class Memory(StorageMixin, SearchMixin, MemoryCoreMixin):
 
         return "\n".join(lines) if lines else ""
 
+    def build_cache_optimized_context(
+        self,
+        task_descr: str,
+        user_id: Optional[str] = None,
+        additional: str = "",
+        max_items: int = 3,
+        include_cache_boundary: bool = True,
+        include_in_output: Optional[bool] = None
+    ) -> Dict[str, str]:
+        """
+        Build context with cache boundary markers for prompt prefix caching optimization.
+        
+        Returns a dictionary with 'stable_prefix' and 'cache_boundary' keys.
+        The stable prefix contains deterministically ordered content that should
+        remain constant between turns for effective prompt caching.
+        
+        Args:
+            task_descr: Task description for memory search
+            user_id: Optional user ID for personalized memory
+            additional: Additional context to include in search
+            max_items: Maximum items per memory category
+            include_cache_boundary: Whether to include cache boundary marker
+            include_in_output: Whether to include memory content in output
+            
+        Returns:
+            Dict with 'stable_prefix' and 'cache_boundary' keys
+        """
+        # Preserve original behavior: include_in_output=None means debug-level-only
+        # Don't change the default behavior for backward compatibility
+            
+        # Build the stable context using existing method
+        stable_context = self.build_context_for_task(
+            task_descr=task_descr,
+            user_id=user_id,
+            additional=additional,
+            max_items=max_items,
+            include_in_output=include_in_output
+        )
+        
+        result = {"stable_prefix": stable_context}
+        
+        result["cache_boundary"] = CACHE_BOUNDARY if include_cache_boundary else ""
+            
+        return result
+
     # -------------------------------------------------------------------------
     #                      Master Reset (Everything)
     # -------------------------------------------------------------------------

src/praisonai-agents/praisonaiagents/memory/search.py

@@ -170,10 +170,10 @@ class SearchMixin:
         
         return self._format_vector_results(results)
     
-    def _search_mongodb_stm(self, query: str, limit: int, metadata_filter: Optional[Dict],
-                           min_quality: Optional[float], user_id: Optional[str]) -> List[Dict[str, Any]]:
-        """Search short-term memory in MongoDB."""
-        if not hasattr(self, 'stm_collection'):
+    def _search_mongodb(self, collection, query: str, limit: int, metadata_filter: Optional[Dict],
+                        min_quality: Optional[float], user_id: Optional[str]) -> List[Dict[str, Any]]:
+        """Search MongoDB collection with given parameters."""
+        if not collection:
             return []
         
         # Build search filter
@@ -191,120 +191,77 @@ class SearchMixin:
             search_filter["metadata.user_id"] = user_id
         
         # Perform search with text score
-        cursor = self.stm_collection.find(
+        cursor = collection.find(
             search_filter,
             {"score": {"$meta": "textScore"}}
         ).sort([("score", {"$meta": "textScore"})]).limit(limit)
         
         return [self._format_mongodb_result(doc) for doc in cursor]
     
+    def _search_mongodb_stm(self, query: str, limit: int, metadata_filter: Optional[Dict],
+                           min_quality: Optional[float], user_id: Optional[str]) -> List[Dict[str, Any]]:
+        """Search short-term memory in MongoDB."""
+        collection = getattr(self, 'stm_collection', None)
+        return self._search_mongodb(collection, query, limit, metadata_filter, min_quality, user_id)
+    
     def _search_mongodb_ltm(self, query: str, limit: int, metadata_filter: Optional[Dict],
                            min_quality: Optional[float], user_id: Optional[str]) -> List[Dict[str, Any]]:
         """Search long-term memory in MongoDB."""
-        if not hasattr(self, 'ltm_collection'):
+        collection = getattr(self, 'ltm_collection', None)
+        return self._search_mongodb(collection, query, limit, metadata_filter, min_quality, user_id)
+    
+    def _search_sqlite(self, conn, table: str, query: str, limit: int, metadata_filter: Optional[Dict],
+                       min_quality: Optional[float], user_id: Optional[str]) -> List[Dict[str, Any]]:
+        """Search SQLite table with given parameters."""
+        if not conn:
             return []
         
-        # Build search filter
-        search_filter = {"$text": {"$search": query}}
-        
-        # Add additional filters
-        if metadata_filter:
-            for key, value in metadata_filter.items():
-                search_filter[f"metadata.{key}"] = value
+        # Build WHERE clause
+        where_clauses = ["content LIKE ?"]
+        params = [f"%{query}%"]
         
         if min_quality is not None:
-            search_filter["quality_score"] = {"$gte": min_quality}
+            where_clauses.append("quality_score >= ?")
+            params.append(min_quality)
+        
+        # Simple metadata filtering (JSON contains check)
+        if metadata_filter:
+            for key, value in metadata_filter.items():
+                where_clauses.append("metadata LIKE ?")
+                params.append(f'%"{key}": "{value}"%')
         
         if user_id:
-            search_filter["metadata.user_id"] = user_id
+            where_clauses.append("metadata LIKE ?")
+            params.append(f'%"user_id": "{user_id}"%')
         
-        # Perform search with text score
-        cursor = self.ltm_collection.find(
-            search_filter,
-            {"score": {"$meta": "textScore"}}
-        ).sort([("score", {"$meta": "textScore"})]).limit(limit)
+        where_clause = " AND ".join(where_clauses)
         
-        return [self._format_mongodb_result(doc) for doc in cursor]
+        query_sql = f"""
+            SELECT id, content, metadata, timestamp, quality_score
+            FROM {table}
+            WHERE {where_clause}
+            ORDER BY quality_score DESC, timestamp DESC
+            LIMIT ?
+        """
+        
+        params.append(limit)
+        
+        cursor = conn.execute(query_sql, params)
+        rows = cursor.fetchall()
+        
+        return [self._format_sqlite_result(dict(row)) for row in rows]
     
     def _search_sqlite_stm(self, query: str, limit: int, metadata_filter: Optional[Dict],
                           min_quality: Optional[float], user_id: Optional[str]) -> List[Dict[str, Any]]:
         """Search short-term memory in SQLite."""
-        conn = self._get_stm_conn()
-        
-        # Build WHERE clause
-        where_clauses = ["content LIKE ?"]
-        params = [f"%{query}%"]
-        
-        if min_quality is not None:
-            where_clauses.append("quality_score >= ?")
-            params.append(min_quality)
-        
-        # Simple metadata filtering (JSON contains check)
-        if metadata_filter:
-            for key, value in metadata_filter.items():
-                where_clauses.append("metadata LIKE ?")
-                params.append(f'%"{key}": "{value}"%')
-        
-        if user_id:
-            where_clauses.append("metadata LIKE ?")
-            params.append(f'%"user_id": "{user_id}"%')
-        
-        where_clause = " AND ".join(where_clauses)
-        
-        query_sql = f"""
-            SELECT id, content, metadata, timestamp, quality_score
-            FROM short_term
-            WHERE {where_clause}
-            ORDER BY quality_score DESC, timestamp DESC
-            LIMIT ?
-        """
-        
-        params.append(limit)
-        
-        cursor = conn.execute(query_sql, params)
-        rows = cursor.fetchall()
-        
-        return [self._format_sqlite_result(dict(row)) for row in rows]
+        conn = self._get_stm_conn() if hasattr(self, '_get_stm_conn') else None
+        return self._search_sqlite(conn, "short_term", query, limit, metadata_filter, min_quality, user_id)
     
     def _search_sqlite_ltm(self, query: str, limit: int, metadata_filter: Optional[Dict],
                           min_quality: Optional[float], user_id: Optional[str]) -> List[Dict[str, Any]]:
         """Search long-term memory in SQLite."""
-        conn = self._get_ltm_conn()
-        
-        # Build WHERE clause
-        where_clauses = ["content LIKE ?"]
-        params = [f"%{query}%"]
-        
-        if min_quality is not None:
-            where_clauses.append("quality_score >= ?")
-            params.append(min_quality)
-        
-        # Simple metadata filtering (JSON contains check)
-        if metadata_filter:
-            for key, value in metadata_filter.items():
-                where_clauses.append("metadata LIKE ?")
-                params.append(f'%"{key}": "{value}"%')
-        
-        if user_id:
-            where_clauses.append("metadata LIKE ?")
-            params.append(f'%"user_id": "{user_id}"%')
-        
-        where_clause = " AND ".join(where_clauses)
-        
-        query_sql = f"""
-            SELECT id, content, metadata, timestamp, quality_score
-            FROM long_term
-            WHERE {where_clause}
-            ORDER BY quality_score DESC, timestamp DESC
-            LIMIT ?
-        """
-        
-        params.append(limit)
-        
-        cursor = conn.execute(query_sql, params)
-        rows = cursor.fetchall()
-        
-        return [self._format_sqlite_result(dict(row)) for row in rows]
+        conn = self._get_ltm_conn() if hasattr(self, '_get_ltm_conn') else None
+        return self._search_sqlite(conn, "long_term", query, limit, metadata_filter, min_quality, user_id)
     
     def _format_vector_results(self, results: Dict) -> List[Dict[str, Any]]:
         """Format ChromaDB vector search results."""

src/praisonai-agents/praisonaiagents/memory/workflows.py

@@ -27,7 +27,7 @@ from pathlib import Path
 from typing import Any, Dict, List, Optional, Callable
 from dataclasses import dataclass, field
 from ..task.task import Task
-from ..workflows.results import StepResult, StepError, WorkflowResult, StepStatus, ErrorStrategy
+from ..workflows.results import StepError, WorkflowResult, StepStatus, ErrorStrategy
 
 logger = get_logger(__name__)
 

src/praisonai-agents/praisonaiagents/permissions/__init__.py

@@ -34,6 +34,7 @@ __all__ = [
     "PermissionAction",
     "PermissionMode",
     "PermissionResult",
+    "PersistentApproval",
     "DoomLoopDetector",
 ]
 
@@ -60,6 +61,10 @@ def __getattr__(name: str):
         from .rules import PermissionResult
         return PermissionResult
     
+    if name == "PersistentApproval":
+        from .rules import PersistentApproval
+        return PersistentApproval
+    
     if name == "DoomLoopDetector":
         from .doom_loop import DoomLoopDetector
         return DoomLoopDetector

src/praisonai-agents/praisonaiagents/permissions/manager.py

@@ -111,6 +111,11 @@ class PermissionManager:
         except IOError as e:
             logger.error(f"Failed to save rules: {e}")
     
+    def save_rules(self):
+        """Public method to save rules to disk."""
+        with self._lock:
+            self._save_rules()
+    
     def _load_approvals(self):
         """Load approvals from disk."""
         path = self._get_approvals_path()

src/praisonai-agents/praisonaiagents/process/process.py

@@ -196,8 +196,13 @@ class Process:
         except (json.JSONDecodeError, ValueError, TypeError) as e:
             raise Exception(f"Failed to parse response: {response}") from e
 
-    def _create_loop_subtasks(self, loop_task: Task):
-        """Create subtasks for a loop task from input file."""
+    def _create_loop_subtasks(self, loop_task: Task, decision_mode: bool = False):
+        """Create subtasks for a loop task from input file.
+        
+        Args:
+            loop_task: The loop task to create subtasks for
+            decision_mode: If True, create decision-type subtasks with conditions (for start tasks)
+        """
         if not loop_task.input_file:
             logging.warning(f"_create_loop_subtasks called for {loop_task.name} but no input_file specified")
             return
@@ -229,20 +234,45 @@ class Process:
                         task_count += 1
                         logging.debug(f"Creating subtask from CSV row {i+1}: {task_desc}")
 
-                        row_task = Task(
-                            description=f"{loop_task.description}\n{task_desc}" if loop_task.description else task_desc,
-                            agent=loop_task.agent,
-                            name=f"{loop_task.name}_{task_count}" if loop_task.name else task_desc,
-                            expected_output=getattr(loop_task, 'expected_output', None),
-                            on_task_complete=loop_task.callback,  # Inherit callback from parent loop task
-                            is_start=(task_count == 1),
-                            task_type="task"
-                        )
+                        # Configure task based on decision_mode
+                        if decision_mode:
+                            # For start tasks: create decision-type tasks with conditions and inherited next_tasks
+                            inherited_next_tasks = loop_task.next_tasks if loop_task.next_tasks else []
+                            row_name = f"{loop_task.name}_{task_count}" if loop_task.name else task_desc
+                            row_task = Task(
+                                description=f"{loop_task.description}\n{task_desc}" if loop_task.description else task_desc,
+                                agent=loop_task.agent,
+                                name=row_name,
+                                expected_output=getattr(loop_task, 'expected_output', None),
+                                on_task_complete=loop_task.callback,  # Inherit callback from parent loop task
+                                is_start=(task_count == 1),
+                                task_type="decision",  # Change to decision type for start tasks
+                                next_tasks=inherited_next_tasks,  # Inherit parent's next tasks
+                                condition={
+                                    "done": inherited_next_tasks if inherited_next_tasks else [],
+                                    "retry": [row_name],
+                                    "exit": []  # Empty list for exit condition
+                                }
+                            )
+                        else:
+                            # For regular loop tasks: create basic task-type subtasks
+                            row_task = Task(
+                                description=f"{loop_task.description}\n{task_desc}" if loop_task.description else task_desc,
+                                agent=loop_task.agent,
+                                name=f"{loop_task.name}_{task_count}" if loop_task.name else task_desc,
+                                expected_output=getattr(loop_task, 'expected_output', None),
+                                on_task_complete=loop_task.callback,  # Inherit callback from parent loop task
+                                is_start=(task_count == 1),
+                                task_type="task"
+                            )
+                        
                         self.tasks[row_task.id] = row_task
                         new_tasks.append(row_task)
 
                         if previous_task:
                             previous_task.next_tasks = [row_task.name]
+                            if decision_mode:
+                                previous_task.condition["done"] = [row_task.name]  # Use "done" consistently for decision tasks
                         previous_task = row_task
 
                     logging.info(f"Created {task_count} subtasks from CSV file for {loop_task.name}")
@@ -254,21 +284,42 @@ class Process:
                     for i, line in enumerate(lines):
                         if not line.strip():  # Skip empty lines
                             continue
-                            
-                        row_task = Task(
-                            description=f"{loop_task.description}\n{line.strip()}" if loop_task.description else line.strip(),
-                            agent=loop_task.agent,
-                            name=f"{loop_task.name}_{i+1}" if loop_task.name else line.strip(),
-                            expected_output=getattr(loop_task, 'expected_output', None),
-                            on_task_complete=loop_task.callback,  # Inherit callback from parent loop task
-                            is_start=(i == 0),
-                            task_type="task"
-                        )
+                        
+                        # Configure task based on decision_mode
+                        if decision_mode:
+                            # For start tasks: create tasks with conditions 
+                            row_task = Task(
+                                description=f"{loop_task.description}\n{line.strip()}" if loop_task.description else line.strip(),
+                                agent=loop_task.agent,
+                                name=f"{loop_task.name}_{i+1}" if loop_task.name else line.strip(),
+                                expected_output=getattr(loop_task, 'expected_output', None),
+                                on_task_complete=loop_task.callback,  # Inherit callback from parent loop task
+                                is_start=(i == 0),
+                                task_type="task",
+                                condition={
+                                    "complete": ["next"],
+                                    "retry": ["current"]
+                                }
+                            )
+                        else:
+                            # For regular loop tasks: create basic tasks
+                            row_task = Task(
+                                description=f"{loop_task.description}\n{line.strip()}" if loop_task.description else line.strip(),
+                                agent=loop_task.agent,
+                                name=f"{loop_task.name}_{i+1}" if loop_task.name else line.strip(),
+                                expected_output=getattr(loop_task, 'expected_output', None),
+                                on_task_complete=loop_task.callback,  # Inherit callback from parent loop task
+                                is_start=(i == 0),
+                                task_type="task"
+                            )
+                        
                         self.tasks[row_task.id] = row_task
                         new_tasks.append(row_task)
 
                         if previous_task:
                             previous_task.next_tasks = [row_task.name]
+                            if decision_mode:
+                                previous_task.condition["complete"] = [row_task.name]
                         previous_task = row_task
 
                     logging.info(f"Created {len(new_tasks)} subtasks from text file for {loop_task.name}")
@@ -276,7 +327,12 @@ class Process:
             if new_tasks and loop_task.next_tasks:
                 # Connect last subtask to loop task's next tasks
                 last_task = new_tasks[-1]
-                last_task.next_tasks = loop_task.next_tasks
+                if decision_mode:
+                    # For decision mode, ensure the last task points to parent's next tasks
+                    if not last_task.next_tasks:
+                        last_task.next_tasks = loop_task.next_tasks
+                else:
+                    last_task.next_tasks = loop_task.next_tasks
 
         except Exception as e:
             logging.error(f"Failed to create subtasks for loop task {loop_task.name}: {e}")
@@ -562,7 +618,6 @@ class Process:
 
         current_task = start_task
         visited_tasks = set()
-        loop_data = {}  # Store loop-specific data
 
         # TODO: start task with loop feature is not available in aworkflow method
 
@@ -732,9 +787,6 @@ Subtask: {st.name}
                 logging.debug(f"Task next_tasks: {current_task.next_tasks}")
                 yield task_id
                 visited_tasks.add(task_id)
-                # Reset description to original after execution to prevent context accumulation
-                if hasattr(current_task, '_original_description'):
-                    current_task.description = current_task._original_description
 
                 # Only end workflow if no next_tasks AND no conditions
                 if not current_task.next_tasks and not current_task.condition and not any(
@@ -772,22 +824,6 @@ Subtask: {st.name}
                         logging.debug(f"=== Skipping reset for loop/decision/subtask/parallel or rerun=False: {subtask_name} ===")
                         logging.debug(f"Keeping status as: {self.tasks[task_id].status}")
 
-            # Handle loop progression
-            if current_task.task_type == "loop":
-                loop_key = f"loop_{current_task.name}"
-                if loop_key in loop_data:
-                    loop_info = loop_data[loop_key]
-                    loop_info["index"] += 1
-                    has_more = loop_info["remaining"] > 0
-
-                    # Update result to trigger correct condition
-                    if current_task.result:
-                        result = current_task.result.raw
-                        if has_more:
-                            result += "\nmore"
-                        else:
-                            result += "\ndone"
-                        current_task.result.raw = result
 
             # Determine next task based on result
             next_task = None
@@ -1112,104 +1148,29 @@ Provide a JSON with the structure:
         if start_task and start_task.task_type == "loop" and not start_task.input_file:
             start_task.input_file = "tasks.csv"
 
-        # --- If loop + input_file, read file & create tasks
+        # --- If loop + input_file, read file & create tasks using consolidated helper
         if start_task and start_task.task_type == "loop" and getattr(start_task, "input_file", None):
             try:
-                file_ext = os.path.splitext(start_task.input_file)[1].lower()
-                new_tasks = []
-
-                if file_ext == ".csv":
-                    with open(start_task.input_file, "r", encoding="utf-8") as f:
-                        reader = csv.reader(f, quotechar='"', escapechar='\\')  # Handle quoted/escaped fields
-                        previous_task = None
-                        task_count = 0
-
-                        for i, row in enumerate(reader):
-                            if not row:  # Skip truly empty rows
-                                continue
-
-                            # Properly handle Q&A pairs with potential commas
-                            task_desc = row[0].strip() if row else ""
-                            if len(row) > 1:
-                                # Preserve all fields in case of multiple commas
-                                question = row[0].strip()
-                                answer = ",".join(field.strip() for field in row[1:])
-                                task_desc = f"Question: {question}\nAnswer: {answer}"
-
-                            if not task_desc:  # Skip rows with empty content
-                                continue
-
-                            task_count += 1
-                            logging.debug(f"Processing CSV row {i+1}: {task_desc}")
-
-                            # Inherit next_tasks from parent loop task
-                            inherited_next_tasks = start_task.next_tasks if start_task.next_tasks else []
-
-                            row_task = Task(
-                                description=f"{start_task.description}\n{task_desc}" if start_task.description else task_desc,
-                                agent=start_task.agent,
-                                name=f"{start_task.name}_{task_count}" if start_task.name else task_desc,
-                                expected_output=getattr(start_task, 'expected_output', None),
-                                on_task_complete=start_task.callback,  # Inherit callback from parent loop task
-                                is_start=(task_count == 1),
-                                task_type="decision",  # Change to decision type
-                                next_tasks=inherited_next_tasks,  # Inherit parent's next tasks
-                                condition={
-                                    "done": inherited_next_tasks if inherited_next_tasks else ["next"],  # Use full inherited_next_tasks
-                                    "retry": ["current"],
-                                    "exit": []  # Empty list for exit condition
-                                }
-                            )
-                            self.tasks[row_task.id] = row_task
-                            new_tasks.append(row_task)
-
-                            if previous_task:
-                                previous_task.next_tasks = [row_task.name]
-                                previous_task.condition["done"] = [row_task.name]  # Use "done" consistently
-                            previous_task = row_task
-
-                            # For the last task in the loop, ensure it points to parent's next tasks
-                            if task_count > 0 and not row_task.next_tasks:
-                                row_task.next_tasks = inherited_next_tasks
-
-                        logging.info(f"Processed {task_count} rows from CSV file")
-                else:
-                    # If not CSV, read lines
-                    with open(start_task.input_file, "r", encoding="utf-8") as f:
-                        lines = f.read().splitlines()
-                        previous_task = None
-                        for i, line in enumerate(lines):
-                            row_task = Task(
-                                description=f"{start_task.description}\n{line.strip()}" if start_task.description else line.strip(),
-                                agent=start_task.agent,
-                                name=f"{start_task.name}_{i+1}" if start_task.name else line.strip(),
-                                expected_output=getattr(start_task, 'expected_output', None),
-                                on_task_complete=start_task.callback,  # Inherit callback from parent loop task
-                                is_start=(i == 0),
-                                task_type="task",
-                                condition={
-                                    "complete": ["next"],
-                                    "retry": ["current"]
-                                }
-                            )
-                            self.tasks[row_task.id] = row_task
-                            new_tasks.append(row_task)
-
-                            if previous_task:
-                                previous_task.next_tasks = [row_task.name]
-                                previous_task.condition["complete"] = [row_task.name]
-                            previous_task = row_task
-
-                if new_tasks:
-                    start_task = new_tasks[0]
-                    logging.info(f"Created {len(new_tasks)} tasks from: {start_task.input_file}")
+                parent_loop_task = start_task
+                parent_input_file = parent_loop_task.input_file
+                self._create_loop_subtasks(parent_loop_task, decision_mode=True)
+                # Get the first created subtask as the new start task
+                subtasks = [
+                    t for t in self.tasks.values()
+                    if t.name.startswith(parent_loop_task.name + "_")
+                ]
+                if subtasks:
+                    # Mark parent loop task as completed and find start subtask
+                    parent_loop_task.status = "completed"
+                    parent_loop_task._subtasks_created = True
+                    start_task = next((t for t in subtasks if t.is_start), subtasks[0])
+                    logging.info(f"Created {len(subtasks)} tasks from: {parent_input_file}")
             except Exception as e:
                 logging.error(f"Failed to read file tasks: {e}")
 
         # end of start task handling
         current_task = start_task
         visited_tasks = set()
-        loop_data = {}  # Store loop-specific data
 
         while current_task:
             current_iter += 1
@@ -1256,7 +1217,7 @@ Tasks by type:
                 break  # Exit immediately to prevent task reset
 
 
-            # Handle loop task file reading at runtime
+            # Handle loop task file reading at runtime using consolidated helper
             if (current_task.task_type == "loop" and
                 current_task is not start_task and
                 getattr(current_task, "_subtasks_created", False) is not True):
@@ -1266,66 +1227,18 @@ Tasks by type:
 
                 if getattr(current_task, "input_file", None):
                     try:
-                        file_ext = os.path.splitext(current_task.input_file)[1].lower()
-                        new_tasks = []
-
-                        if file_ext == ".csv":
-                            with open(current_task.input_file, "r", encoding="utf-8") as f:
-                                reader = csv.reader(f)
-                                previous_task = None
-                                for i, row in enumerate(reader):
-                                    if row:  # Skip empty rows
-                                        task_desc = row[0]  # Take first column
-                                        row_task = Task(
-                                            description=f"{current_task.description}\n{task_desc}" if current_task.description else task_desc,
-                                            agent=current_task.agent,
-                                            name=f"{current_task.name}_{i+1}" if current_task.name else task_desc,
-                                            expected_output=getattr(current_task, 'expected_output', None),
-                                            on_task_complete=current_task.callback,  # Inherit callback from parent loop task
-                                            is_start=(i == 0),
-                                            task_type="task",
-                                            condition={
-                                                "complete": ["next"],
-                                                "retry": ["current"]
-                                            }
-                                        )
-                                        self.tasks[row_task.id] = row_task
-                                        new_tasks.append(row_task)
-
-                                        if previous_task:
-                                            previous_task.next_tasks = [row_task.name]
-                                            previous_task.condition["complete"] = [row_task.name]
-                                        previous_task = row_task
-                        else:
-                            with open(current_task.input_file, "r", encoding="utf-8") as f:
-                                lines = f.read().splitlines()
-                                previous_task = None
-                                for i, line in enumerate(lines):
-                                    row_task = Task(
-                                        description=f"{current_task.description}\n{line.strip()}" if current_task.description else line.strip(),
-                                        agent=current_task.agent,
-                                        name=f"{current_task.name}_{i+1}" if current_task.name else line.strip(),
-                                        expected_output=getattr(current_task, 'expected_output', None),
-                                        on_task_complete=current_task.callback,  # Inherit callback from parent loop task
-                                        is_start=(i == 0),
-                                        task_type="task",
-                                        condition={
-                                            "complete": ["next"],
-                                            "retry": ["current"]
-                                        }
-                                    )
-                                    self.tasks[row_task.id] = row_task
-                                    new_tasks.append(row_task)
-
-                                    if previous_task:
-                                        previous_task.next_tasks = [row_task.name]
-                                        previous_task.condition["complete"] = [row_task.name]
-                                    previous_task = row_task
-
-                        if new_tasks:
-                            current_task.next_tasks = [new_tasks[0].name]
+                        self._create_loop_subtasks(current_task, decision_mode=False)
+                        # Update current task to point to first subtask
+                        subtasks = [
+                            t for t in self.tasks.values()
+                            if t.name.startswith(current_task.name + "_")
+                        ]
+                        if subtasks:
+                            # Find first subtask by is_start flag or first in list
+                            first_subtask = next((t for t in subtasks if t.is_start), subtasks[0])
+                            current_task.next_tasks = [first_subtask.name]
                             current_task._subtasks_created = True
-                            logging.info(f"Created {len(new_tasks)} tasks from: {current_task.input_file} for loop task {current_task.name}")
+                            logging.info(f"Created {len(subtasks)} tasks from: {current_task.input_file} for loop task {current_task.name}")
                     except Exception as e:
                         logging.error(f"Failed to read file tasks for loop task {current_task.name}: {e}")
 
@@ -1451,9 +1364,6 @@ Subtask: {st.name}
                 logging.debug(f"Task next_tasks: {current_task.next_tasks}")
                 yield task_id
                 visited_tasks.add(task_id)
-                # Reset description to original after execution to prevent context accumulation
-                if hasattr(current_task, '_original_description'):
-                    current_task.description = current_task._original_description
 
                 # Only end workflow if no next_tasks AND no conditions
                 if not current_task.next_tasks and not current_task.condition and not any(
@@ -1489,22 +1399,6 @@ Subtask: {st.name}
                     logging.debug(f"Keeping status as: {self.tasks[task_id].status}")
 
 
-            # Handle loop progression
-            if current_task.task_type == "loop":
-                loop_key = f"loop_{current_task.name}"
-                if loop_key in loop_data:
-                    loop_info = loop_data[loop_key]
-                    loop_info["index"] += 1
-                    has_more = loop_info["remaining"] > 0
-
-                    # Update result to trigger correct condition
-                    if current_task.result:
-                        result = current_task.result.raw
-                        if has_more:
-                            result += "\nmore"
-                        else:
-                            result += "\ndone"
-                        current_task.result.raw = result
 
             # Determine next task based on result
             next_task = None

src/praisonai-agents/praisonaiagents/runtime/__init__.py

@@ -0,0 +1,40 @@
+"""
+Runtime execution components for PraisonAI agents.
+
+This module provides runtime execution abstractions and protocols for 
+standardizing agent execution across different harness types.
+"""
+
+from .turn_context import (
+    PreparedTurnContext, 
+    ModelReference,
+    ToolSchema,
+    TranscriptWindow,
+    DeliveryChannels,
+    SessionCorrelation,
+    RuntimeMode,
+    create_default_model_ref,
+    create_empty_transcript,
+    create_default_delivery,
+    create_session_correlation,
+)
+from .protocols import TurnRuntimeProtocol, TurnContextBuilderProtocol
+from .context_builder import DefaultTurnContextBuilder, default_context_builder
+
+__all__ = [
+    'PreparedTurnContext',
+    'TurnRuntimeProtocol',
+    'TurnContextBuilderProtocol',
+    'ModelReference',
+    'ToolSchema', 
+    'TranscriptWindow',
+    'DeliveryChannels',
+    'SessionCorrelation',
+    'RuntimeMode',
+    'create_default_model_ref',
+    'create_empty_transcript',
+    'create_default_delivery',
+    'create_session_correlation',
+    'DefaultTurnContextBuilder',
+    'default_context_builder',
+]

src/praisonai-agents/praisonaiagents/runtime/config.py

@@ -0,0 +1,169 @@
+"""AgentRuntimeConfig dataclass for model-scoped runtime selection.
+
+Protocol-driven design following AGENTS.md:
+- Lightweight dataclass for configuration
+- No heavy implementations (those live in wrapper layer)
+- Support for per-model and per-provider runtime configuration
+"""
+
+from dataclasses import dataclass, field
+from typing import Optional, Dict, Any, Union
+
+
+@dataclass
+class AgentRuntimeConfig:
+    """Model-scoped runtime configuration for PraisonAI Agents.
+    
+    Supports the resolution order:
+    per-model runtime → per-provider default → auto → built-in default
+    
+    This replaces agent-level cli_backend with model-scoped runtime selection.
+    """
+    # Runtime identifier (e.g., "claude-code", "codex-cli", "praisonai")
+    runtime: Optional[str] = None
+    
+    # Runtime-specific configuration overrides
+    config_overrides: Dict[str, Any] = field(default_factory=dict)
+    
+    # Provider-level default runtime (for YAML providers.<name>.runtime_default)
+    provider_default: Optional[str] = None
+    
+    # Enable auto-selection if no explicit runtime is specified
+    enable_auto_selection: bool = True
+    
+    # Metadata for runtime resolution
+    metadata: Dict[str, Any] = field(default_factory=dict)
+    
+    def __post_init__(self):
+        """Validate runtime configuration on initialization."""
+        # Ensure config_overrides is a dictionary
+        if not isinstance(self.config_overrides, dict):
+            raise TypeError("config_overrides must be a dictionary")
+        
+        # Ensure metadata is a dictionary  
+        if not isinstance(self.metadata, dict):
+            raise TypeError("metadata must be a dictionary")
+    
+    @classmethod
+    def from_runtime_id(cls, runtime_id: str, **kwargs) -> "AgentRuntimeConfig":
+        """Create AgentRuntimeConfig from a runtime ID string.
+        
+        Args:
+            runtime_id: Runtime identifier (e.g., "claude-code")
+            **kwargs: Additional configuration options
+            
+        Returns:
+            AgentRuntimeConfig instance
+        """
+        return cls(runtime=runtime_id, **kwargs)
+    
+    @classmethod
+    def from_dict(cls, config_dict: Dict[str, Any]) -> "AgentRuntimeConfig":
+        """Create AgentRuntimeConfig from a dictionary.
+        
+        Args:
+            config_dict: Configuration dictionary
+            
+        Returns:
+            AgentRuntimeConfig instance
+            
+        Raises:
+            TypeError: If config_dict is not a dictionary
+            ValueError: If required fields are missing or invalid
+        """
+        if not isinstance(config_dict, dict):
+            raise TypeError("config_dict must be a dictionary")
+        
+        # Extract known fields
+        runtime = config_dict.get("runtime")
+        config_overrides = config_dict.get("config_overrides", {})
+        provider_default = config_dict.get("provider_default")
+        enable_auto_selection = config_dict.get("enable_auto_selection", True)
+        metadata = config_dict.get("metadata", {})
+        
+        # Validate types
+        if config_overrides is not None and not isinstance(config_overrides, dict):
+            raise TypeError("config_overrides must be a dictionary")
+        
+        if metadata is not None and not isinstance(metadata, dict):
+            raise TypeError("metadata must be a dictionary")
+        
+        return cls(
+            runtime=runtime,
+            config_overrides=config_overrides,
+            provider_default=provider_default,
+            enable_auto_selection=enable_auto_selection,
+            metadata=metadata
+        )
+    
+    def to_dict(self) -> Dict[str, Any]:
+        """Convert AgentRuntimeConfig to a dictionary.
+        
+        Returns:
+            Dictionary representation of the configuration
+        """
+        return {
+            "runtime": self.runtime,
+            "config_overrides": self.config_overrides.copy(),
+            "provider_default": self.provider_default,
+            "enable_auto_selection": self.enable_auto_selection,
+            "metadata": self.metadata.copy()
+        }
+    
+    def merge_overrides(self, overrides: Dict[str, Any]) -> "AgentRuntimeConfig":
+        """Create a new AgentRuntimeConfig with merged configuration overrides.
+        
+        Args:
+            overrides: Configuration overrides to merge
+            
+        Returns:
+            New AgentRuntimeConfig instance with merged overrides
+        """
+        if not isinstance(overrides, dict):
+            raise TypeError("overrides must be a dictionary")
+        
+        # Create new config overrides by merging
+        new_config_overrides = {**self.config_overrides, **overrides}
+        
+        return AgentRuntimeConfig(
+            runtime=self.runtime,
+            config_overrides=new_config_overrides,
+            provider_default=self.provider_default,
+            enable_auto_selection=self.enable_auto_selection,
+            metadata=self.metadata.copy()
+        )
+    
+    def with_runtime(self, runtime_id: str) -> "AgentRuntimeConfig":
+        """Create a new AgentRuntimeConfig with a different runtime ID.
+        
+        Args:
+            runtime_id: New runtime identifier
+            
+        Returns:
+            New AgentRuntimeConfig instance with updated runtime
+        """
+        return AgentRuntimeConfig(
+            runtime=runtime_id,
+            config_overrides=self.config_overrides.copy(),
+            provider_default=self.provider_default,
+            enable_auto_selection=self.enable_auto_selection,
+            metadata=self.metadata.copy()
+        )
+    
+    def is_explicit(self) -> bool:
+        """Check if this configuration specifies an explicit runtime.
+        
+        Returns:
+            True if runtime is explicitly specified, False otherwise
+        """
+        return self.runtime is not None and self.runtime != ""
+    
+    def __repr__(self) -> str:
+        """String representation of AgentRuntimeConfig."""
+        return (
+            f"AgentRuntimeConfig("
+            f"runtime={self.runtime!r}, "
+            f"config_overrides={self.config_overrides!r}, "
+            f"provider_default={self.provider_default!r}, "
+            f"enable_auto_selection={self.enable_auto_selection!r})"
+        )

src/praisonai-agents/praisonaiagents/runtime/context_builder.py

@@ -0,0 +1,452 @@
+"""
+Context Builder for PreparedTurnContext.
+
+This module provides the DefaultTurnContextBuilder that prepares
+PreparedTurnContext instances from agent configuration and request
+parameters. It consolidates the scattered context preparation logic
+from chat_mixin.py, chat_handler.py, and other execution paths.
+"""
+
+from __future__ import annotations
+
+import copy
+import logging
+import time
+import uuid
+from typing import Any, Dict, List, Optional, TYPE_CHECKING
+
+from .turn_context import (
+    PreparedTurnContext,
+    ModelReference, 
+    ToolSchema,
+    TranscriptWindow,
+    DeliveryChannels,
+    SessionCorrelation,
+    RuntimeMode,
+)
+from .protocols import TurnContextBuilderProtocol
+
+if TYPE_CHECKING:
+    from ..agent.protocols import AgentProtocol
+    from ..streaming.events import StreamEventEmitter
+
+logger = logging.getLogger(__name__)
+
+
+class DefaultTurnContextBuilder:
+    """
+    Default implementation of turn context building.
+    
+    This builder extracts and normalizes configuration from Agent instances
+    to create PreparedTurnContext objects. It consolidates the logic that
+    was previously scattered across multiple mixins.
+    """
+    
+    def __init__(self):
+        self._cache: Dict[str, Any] = {}
+    
+    def build_context(
+        self,
+        agent: AgentProtocol,
+        prompt: str,
+        **kwargs: Any
+    ) -> PreparedTurnContext:
+        """
+        Build a prepared turn context from agent and request.
+        
+        Args:
+            agent: The agent instance
+            prompt: The user prompt for this turn
+            **kwargs: Additional request parameters including:
+                - model: Override model ID
+                - tools: Override tools list
+                - stream: Enable streaming
+                - temperature: Model temperature
+                - max_tokens: Token limit
+                - session_id: Session identifier
+                - turn_id: Turn identifier
+                
+        Returns:
+            A prepared turn context ready for execution
+        """
+        try:
+            # Extract runtime mode from kwargs
+            runtime_mode = self._determine_runtime_mode(kwargs)
+            
+            # Build model reference
+            model_ref = self._build_model_reference(agent, kwargs)
+            
+            # Normalize tools
+            tools = self._build_tool_schemas(agent, kwargs)
+            
+            # Build transcript window
+            transcript = self._build_transcript_window(agent, prompt, kwargs)
+            
+            # Setup delivery channels
+            delivery = self._build_delivery_channels(agent, kwargs)
+            
+            # Create correlation IDs
+            correlation = self._build_session_correlation(agent, kwargs)
+            
+            # Create the context
+            context = PreparedTurnContext(
+                model_ref=model_ref,
+                agent_runtime=agent,
+                tools=tools,
+                transcript=transcript,
+                delivery=delivery,
+                correlation=correlation,
+                runtime_mode=runtime_mode,
+                turn_metadata=self._extract_turn_metadata(agent, kwargs),
+                created_at=time.time()
+            )
+            
+            logger.debug(
+                f"Built turn context: {context.get_message_count()} messages, "
+                f"{len(context.tools)} tools, mode={context.runtime_mode.value}"
+            )
+            
+            return context
+            
+        except Exception as e:
+            logger.error(f"Failed to build turn context: {e}")
+            raise
+    
+    def _determine_runtime_mode(self, kwargs: Dict[str, Any]) -> RuntimeMode:
+        """Determine runtime mode from request parameters."""
+        is_stream = kwargs.get('stream', False)
+        is_async = kwargs.get('async_execution', False)
+        
+        if is_async and is_stream:
+            return RuntimeMode.ASYNC_STREAM
+        elif is_async:
+            return RuntimeMode.ASYNC
+        elif is_stream:
+            return RuntimeMode.STREAM
+        else:
+            return RuntimeMode.SYNC
+    
+    def _build_model_reference(
+        self, 
+        agent: AgentProtocol, 
+        kwargs: Dict[str, Any]
+    ) -> ModelReference:
+        """Build model reference from agent configuration and overrides."""
+        # Get model ID (kwargs override, then agent default)
+        model_id = kwargs.get('model') or getattr(agent, 'model', 'gpt-3.5-turbo')
+        
+        # Determine provider from model ID or agent config
+        provider = self._determine_provider(model_id, agent)
+        
+        # Get model capabilities
+        supports_streaming = kwargs.get('stream', False) or getattr(agent, '_supports_streaming', True)
+        supports_tools = len(getattr(agent, 'tools', [])) > 0
+        supports_system_prompts = getattr(agent, 'use_system_prompt', True)
+        
+        # Build model config - agent defaults first, kwargs override
+        model_config = {}
+        if hasattr(agent, 'model_config'):
+            model_config.update(agent.model_config)
+        if 'temperature' in kwargs:
+            model_config['temperature'] = kwargs['temperature']
+        if 'max_tokens' in kwargs:
+            model_config['max_tokens'] = kwargs['max_tokens']
+        
+        return ModelReference(
+            model_id=model_id,
+            provider=provider,
+            supports_streaming=supports_streaming,
+            supports_tools=supports_tools,
+            supports_system_prompts=supports_system_prompts,
+            max_tokens=kwargs.get('max_tokens'),
+            temperature=kwargs.get('temperature'),
+            model_config=model_config
+        )
+    
+    def _determine_provider(self, model_id: str, agent: AgentProtocol) -> str:
+        """Determine provider from model ID or agent configuration."""
+        # Check if agent has explicit provider
+        if hasattr(agent, 'provider'):
+            return agent.provider
+        
+        # Infer from model ID
+        if model_id.startswith('gpt-'):
+            return 'openai'
+        elif model_id.startswith('claude-'):
+            return 'anthropic'
+        elif model_id.startswith('gemini-'):
+            return 'google'
+        elif 'llama' in model_id.lower():
+            return 'meta'
+        else:
+            return 'openai'  # Default fallback
+    
+    def _build_tool_schemas(
+        self,
+        agent: AgentProtocol,
+        kwargs: Dict[str, Any]
+    ) -> List[ToolSchema]:
+        """Build normalized tool schemas from agent tools."""
+        # Get tools from kwargs override or agent - respect explicit empty list
+        if 'tools' in kwargs:
+            raw_tools = kwargs['tools']
+        else:
+            raw_tools = getattr(agent, 'tools', [])
+        
+        if not raw_tools:
+            return []
+        
+        normalized_tools = []
+        for tool in raw_tools:
+            try:
+                schema = self._normalize_tool_schema(tool)
+                if schema:
+                    normalized_tools.append(schema)
+            except Exception as e:
+                logger.warning(f"Failed to normalize tool {tool}: {e}")
+                continue
+        
+        return normalized_tools
+    
+    def _normalize_tool_schema(self, tool: Any) -> Optional[ToolSchema]:
+        """Normalize a single tool into ToolSchema format."""
+        if tool is None:
+            return None
+        
+        # Handle different tool formats
+        if callable(tool):
+            # Function tool
+            return self._normalize_function_tool(tool)
+        elif isinstance(tool, dict):
+            # Dictionary tool (OpenAI format, custom format, etc.)
+            return self._normalize_dict_tool(tool)
+        elif hasattr(tool, 'name') and hasattr(tool, 'description'):
+            # Object with name/description attributes
+            return self._normalize_object_tool(tool)
+        else:
+            logger.warning(f"Unknown tool format: {type(tool)}")
+            return None
+    
+    def _normalize_function_tool(self, func: callable) -> ToolSchema:
+        """Normalize a callable function into ToolSchema."""
+        import inspect
+        
+        name = getattr(func, '__name__', 'unknown_function')
+        description = getattr(func, '__doc__', '') or f"Function: {name}"
+        
+        # Try to extract parameters from function signature
+        try:
+            sig = inspect.signature(func)
+            parameters = {
+                "type": "object",
+                "properties": {},
+                "required": []
+            }
+            
+            for param_name, param in sig.parameters.items():
+                if param_name == 'self':
+                    continue
+                    
+                prop = {"type": "string"}  # Default type
+                if param.annotation != inspect.Parameter.empty:
+                    prop["type"] = self._python_type_to_json_type(param.annotation)
+                    
+                parameters["properties"][param_name] = prop
+                
+                if param.default == inspect.Parameter.empty:
+                    parameters["required"].append(param_name)
+            
+        except Exception:
+            # Fallback to empty parameters
+            parameters = {"type": "object", "properties": {}}
+        
+        return ToolSchema(
+            name=name,
+            description=description.strip(),
+            parameters=parameters,
+            callable=func,
+            source_type="function"
+        )
+    
+    def _normalize_dict_tool(self, tool_dict: Dict[str, Any]) -> ToolSchema:
+        """Normalize a dictionary tool into ToolSchema."""
+        if 'function' in tool_dict:
+            # OpenAI format: {"type": "function", "function": {...}}
+            func_def = tool_dict['function']
+            return ToolSchema(
+                name=func_def.get('name', 'unknown'),
+                description=func_def.get('description', ''),
+                parameters=func_def.get('parameters', {}),
+                source_type="openai"
+            )
+        else:
+            # Direct format: {"name": ..., "description": ..., "parameters": ...}
+            return ToolSchema(
+                name=tool_dict.get('name', 'unknown'),
+                description=tool_dict.get('description', ''),
+                parameters=tool_dict.get('parameters', {}),
+                source_type="custom"
+            )
+    
+    def _normalize_object_tool(self, tool_obj: Any) -> ToolSchema:
+        """Normalize a tool object into ToolSchema."""
+        return ToolSchema(
+            name=getattr(tool_obj, 'name', 'unknown'),
+            description=getattr(tool_obj, 'description', ''),
+            parameters=getattr(tool_obj, 'parameters', {}),
+            callable=getattr(tool_obj, '__call__', None),
+            source_type="object"
+        )
+    
+    def _python_type_to_json_type(self, py_type: type) -> str:
+        """Convert Python type annotation to JSON schema type."""
+        if py_type == str:
+            return "string"
+        elif py_type == int:
+            return "integer"
+        elif py_type == float:
+            return "number"
+        elif py_type == bool:
+            return "boolean"
+        elif py_type == list:
+            return "array"
+        elif py_type == dict:
+            return "object"
+        else:
+            return "string"  # Default fallback
+    
+    def _build_transcript_window(
+        self,
+        agent: AgentProtocol,
+        prompt: str,
+        kwargs: Dict[str, Any]
+    ) -> TranscriptWindow:
+        """Build transcript window from agent conversation history."""
+        # Get system prompt
+        system_prompt = None
+        if hasattr(agent, '_build_system_prompt'):
+            try:
+                system_prompt = agent._build_system_prompt()
+            except Exception as e:
+                logger.warning(f"Failed to build system prompt: {e}")
+        
+        # Get conversation history - deep copy to prevent cross-agent mutations
+        messages = []
+        if hasattr(agent, 'chat_history') and agent.chat_history:
+            messages = copy.deepcopy(agent.chat_history)
+        
+        # Add current prompt as user message
+        if prompt:
+            messages.append({"role": "user", "content": prompt})
+        
+        # Estimate token count (rough approximation)
+        total_tokens = self._estimate_tokens(messages, system_prompt)
+        
+        return TranscriptWindow(
+            messages=messages,
+            total_tokens=total_tokens,
+            system_prompt=system_prompt,
+            context_metadata={
+                "original_prompt": prompt,
+                "history_length": len(messages) - (1 if prompt else 0)
+            }
+        )
+    
+    def _estimate_tokens(
+        self, 
+        messages: List[Dict[str, Any]], 
+        system_prompt: Optional[str]
+    ) -> int:
+        """Rough token estimation for transcript."""
+        total_chars = 0
+        
+        if system_prompt:
+            total_chars += len(system_prompt)
+        
+        for msg in messages:
+            content = msg.get('content', '')
+            if isinstance(content, str):
+                total_chars += len(content)
+        
+        # Rough approximation: 1 token ≈ 4 characters
+        return total_chars // 4
+    
+    def _build_delivery_channels(
+        self,
+        agent: AgentProtocol,
+        kwargs: Dict[str, Any]
+    ) -> DeliveryChannels:
+        """Build delivery channels configuration."""
+        enable_streaming = kwargs.get('stream', False)
+        enable_metrics = kwargs.get('enable_metrics', False)
+        
+        # Get stream emitter from agent if available
+        stream_emitter = None
+        if enable_streaming:
+            if hasattr(agent, '_stream_emitter'):
+                stream_emitter = agent._stream_emitter
+            elif hasattr(agent, 'stream_emitter'):
+                stream_emitter = agent.stream_emitter
+        
+        # Get callbacks
+        callbacks = kwargs.get('callbacks', [])
+        async_callbacks = kwargs.get('async_callbacks', [])
+        
+        return DeliveryChannels(
+            stream_emitter=stream_emitter,
+            callbacks=callbacks,
+            async_callbacks=async_callbacks,
+            enable_streaming=enable_streaming,
+            enable_metrics=enable_metrics
+        )
+    
+    def _build_session_correlation(
+        self,
+        agent: AgentProtocol,
+        kwargs: Dict[str, Any]
+    ) -> SessionCorrelation:
+        """Build session correlation identifiers."""
+        # Use provided IDs or generate new ones
+        session_id = kwargs.get('session_id')
+        if not session_id and hasattr(agent, 'session_id'):
+            session_id = agent.session_id
+        if not session_id:
+            session_id = f"session-{uuid.uuid4().hex[:8]}"
+        
+        turn_id = kwargs.get('turn_id') or f"turn-{uuid.uuid4().hex[:8]}"
+        agent_id = kwargs.get('agent_id') or getattr(agent, 'name', 'agent')
+        run_id = kwargs.get('run_id') or f"run-{uuid.uuid4().hex[:8]}"
+        parent_id = kwargs.get('parent_id')
+        
+        return SessionCorrelation(
+            session_id=session_id,
+            turn_id=turn_id,
+            agent_id=agent_id,
+            run_id=run_id,
+            parent_id=parent_id,
+            trace_metadata=kwargs.get('trace_metadata', {})
+        )
+    
+    def _extract_turn_metadata(
+        self,
+        agent: AgentProtocol,
+        kwargs: Dict[str, Any]
+    ) -> Dict[str, Any]:
+        """Extract additional turn metadata."""
+        metadata = {}
+        
+        # Add agent metadata
+        if hasattr(agent, 'role'):
+            metadata['agent_role'] = agent.role
+        if hasattr(agent, 'goal'):
+            metadata['agent_goal'] = agent.goal
+        
+        # Add request metadata
+        if 'metadata' in kwargs:
+            metadata.update(kwargs['metadata'])
+        
+        return metadata
+
+
+# Global instance for convenience
+default_context_builder = DefaultTurnContextBuilder()

src/praisonai-agents/praisonaiagents/runtime/example_harness.py

@@ -0,0 +1,366 @@
+"""
+Example External Harness using PreparedTurnContext.
+
+This module demonstrates how external harnesses (plugins, managed backends,
+CLI backends, etc.) can use the PreparedTurnContext pattern for consistent
+runtime execution across different execution environments.
+
+This serves as an example implementation for the acceptance criteria:
+"At least one external harness uses the same plan object."
+"""
+
+import asyncio
+import logging
+import time
+from typing import Any, Dict, List, Optional, TYPE_CHECKING
+
+from .turn_context import (
+    PreparedTurnContext,
+    TurnRuntimeProtocol,
+    RuntimeMode,
+)
+from .context_builder import default_context_builder
+from ..streaming.events import StreamEvent, StreamEventType
+
+if TYPE_CHECKING:
+    from ..agent.protocols import AgentProtocol
+
+logger = logging.getLogger(__name__)
+
+
+class PluginHarnessRuntime:
+    """
+    Example plugin harness that uses PreparedTurnContext.
+    
+    This demonstrates how external harnesses can standardize on the
+    PreparedTurnContext pattern instead of implementing their own
+    scattered preparation logic.
+    
+    Before (scattered preparation):
+    - Plugin gathers tools from agent
+    - Plugin builds system prompt
+    - Plugin manages streaming separately
+    - Plugin handles context differently than native runtime
+    
+    After (unified with PreparedTurnContext):
+    - Plugin receives prepared context
+    - Same context used by native runtime
+    - Consistent tool schemas, transcript, delivery channels
+    - Enables consistent metrics and tracing
+    """
+    
+    def __init__(self, plugin_config: Optional[Dict[str, Any]] = None):
+        self.config = plugin_config or {}
+        self.metrics = {}
+        self._supported_modes = [RuntimeMode.SYNC, RuntimeMode.ASYNC, RuntimeMode.STREAM]
+
+    async def run_turn(self, context: PreparedTurnContext) -> str:
+        """
+        Execute turn using plugin-specific logic with prepared context.
+        
+        This method demonstrates how an external harness uses the
+        standardized PreparedTurnContext instead of implementing
+        its own preparation logic.
+        
+        Args:
+            context: The prepared turn context from the builder
+            
+        Returns:
+            Plugin-processed response
+        """
+        start_time = time.time()
+        
+        try:
+            logger.info(
+                f"Plugin executing turn {context.correlation.turn_id} "
+                f"with {len(context.tools)} tools in {context.runtime_mode.value} mode"
+            )
+            
+            # Use prepared context data instead of rebuilding
+            response = await self._execute_with_prepared_data(context)
+            
+            # Apply plugin-specific processing
+            processed_response = await self._apply_plugin_processing(context, response)
+            
+            # Record metrics using correlation IDs from context
+            self._record_metrics(context, start_time, len(processed_response))
+            
+            return processed_response
+            
+        except Exception as e:
+            logger.error(f"Plugin execution failed for turn {context.correlation.turn_id}: {e}")
+            raise
+
+    async def _execute_with_prepared_data(self, context: PreparedTurnContext) -> str:
+        """
+        Execute using the prepared context data.
+        
+        This method shows how to use the standardized context components
+        instead of re-implementing tool gathering, prompt building, etc.
+        """
+        # Extract prompt from prepared transcript (no need to rebuild)
+        user_messages = [
+            msg for msg in context.transcript.messages 
+            if msg.get('role') == 'user'
+        ]
+        prompt = user_messages[-1]['content'] if user_messages else ""
+        
+        # Use prepared system prompt (no need to rebuild)
+        system_prompt = context.transcript.system_prompt or "You are a helpful assistant."
+        
+        # Use prepared tool schemas (normalized format)
+        available_tools = [
+            f"- {tool.name}: {tool.description}" 
+            for tool in context.tools
+        ]
+        tools_text = "\n".join(available_tools) if available_tools else "No tools available"
+        
+        # Use prepared model configuration
+        model_id = context.model_ref.model_id
+        temperature = context.model_ref.temperature or 0.7
+        
+        # Plugin-specific execution (simulated)
+        plugin_response = f"""Plugin Response (Model: {model_id}, Temp: {temperature}):
+
+User: {prompt}
+
+System: {system_prompt}
+
+Available Tools:
+{tools_text}
+
+Processing with plugin harness...
+Response: I understand your request and would process it using the plugin infrastructure."""
+        
+        # Handle streaming if enabled in prepared delivery channels
+        if context.delivery.has_streaming():
+            return await self._stream_response(context, plugin_response)
+        else:
+            return plugin_response
+
+    async def _stream_response(self, context: PreparedTurnContext, response: str) -> str:
+        """
+        Handle streaming using prepared delivery channels.
+        
+        Demonstrates using the prepared streaming configuration
+        instead of setting up streaming from scratch.
+        """
+        if context.delivery.stream_emitter:
+            # Use prepared stream emitter
+            for chunk in response.split():
+                await context.delivery.stream_emitter.emit_async(
+                    StreamEvent(type=StreamEventType.DELTA_TEXT, content=chunk + " ")
+                )
+                await asyncio.sleep(0.01)  # Simulate streaming delay
+        
+        return response
+
+    async def _apply_plugin_processing(
+        self, 
+        context: PreparedTurnContext, 
+        response: str
+    ) -> str:
+        """
+        Apply plugin-specific post-processing.
+        
+        This demonstrates how plugins can add their own processing
+        while still using the standardized context pattern.
+        """
+        # Plugin-specific processing example
+        if self.config.get('add_metadata', True):
+            metadata = f"\n\n[Plugin Metadata: Session={context.correlation.session_id}, Turn={context.correlation.turn_id}]"
+            response += metadata
+        
+        if self.config.get('apply_filters', False):
+            # Apply content filters, transformations, etc.
+            response = response.replace("error", "issue")  # Example filter
+        
+        return response
+
+    def _record_metrics(self, context: PreparedTurnContext, start_time: float, response_length: int):
+        """
+        Record metrics using context correlation IDs.
+        
+        Demonstrates consistent metrics collection across harness types
+        using the standardized context identifiers.
+        """
+        execution_time = time.time() - start_time
+        
+        # Use correlation IDs for consistent metrics
+        session_id = context.correlation.session_id
+        turn_id = context.correlation.turn_id
+        
+        # Record metrics
+        self.metrics[turn_id] = {
+            'session_id': session_id,
+            'execution_time_ms': execution_time * 1000,
+            'response_length': response_length,
+            'model_used': context.model_ref.model_id,
+            'tools_count': len(context.tools),
+            'runtime_mode': context.runtime_mode.value,
+            'timestamp': time.time()
+        }
+        
+        logger.debug(
+            f"Plugin metrics recorded: {execution_time:.3f}s, "
+            f"{response_length} chars, {len(context.tools)} tools"
+        )
+
+    def supports_runtime_mode(self, mode: RuntimeMode) -> bool:
+        """Check if this plugin supports the given runtime mode."""
+        return mode in self._supported_modes
+
+    def get_supported_modes(self) -> List[RuntimeMode]:
+        """Get all supported runtime modes."""
+        return self._supported_modes.copy()
+
+    def get_metrics(self) -> Dict[str, Any]:
+        """Get collected metrics."""
+        return self.metrics.copy()
+
+
+class CLIBackendHarness:
+    """
+    Example CLI backend harness using PreparedTurnContext.
+    
+    This demonstrates how CLI backends can use the same prepared
+    context as the native runtime, eliminating duplication in
+    tool assembly and message building.
+    """
+    
+    def __init__(self, cli_config: Optional[Dict[str, Any]] = None):
+        self.config = cli_config or {}
+        self._supported_modes = [RuntimeMode.SYNC, RuntimeMode.ASYNC]
+
+    async def run_turn(self, context: PreparedTurnContext) -> str:
+        """Execute turn via CLI backend using prepared context."""
+        logger.info(f"CLI backend executing turn {context.correlation.turn_id}")
+        
+        # Convert prepared context to CLI command
+        cli_command = self._build_cli_command(context)
+        
+        # Execute CLI command (simulated)
+        result = await self._execute_cli_command(cli_command)
+        
+        return f"CLI Backend Result: {result}"
+
+    def _build_cli_command(self, context: PreparedTurnContext) -> Dict[str, Any]:
+        """
+        Build CLI command from prepared context.
+        
+        Shows how prepared context eliminates the need for CLI backends
+        to implement their own tool gathering and prompt building logic.
+        """
+        # Extract prompt from prepared transcript
+        user_messages = [msg for msg in context.transcript.messages if msg.get('role') == 'user']
+        prompt = user_messages[-1]['content'] if user_messages else ""
+        
+        # Use prepared model reference
+        model_config = context.model_ref.model_config.copy()
+        model_config['model'] = context.model_ref.model_id
+        
+        # Use prepared tool schemas (convert to CLI format)
+        tools = [
+            {
+                'name': tool.name,
+                'description': tool.description,
+                'source_type': tool.source_type
+            }
+            for tool in context.tools
+        ]
+        
+        return {
+            'prompt': prompt,
+            'system_prompt': context.transcript.system_prompt,
+            'model_config': model_config,
+            'tools': tools,
+            'session_id': context.correlation.session_id,
+            'turn_id': context.correlation.turn_id
+        }
+
+    async def _execute_cli_command(self, command: Dict[str, Any]) -> str:
+        """Execute the CLI command (simulated)."""
+        # Simulate CLI execution delay
+        await asyncio.sleep(0.1)
+        
+        return f"Processed '{command['prompt']}' with {len(command['tools'])} tools using {command['model_config']['model']}"
+
+    def supports_runtime_mode(self, mode: RuntimeMode) -> bool:
+        """Check if CLI backend supports the runtime mode."""
+        return mode in self._supported_modes
+
+    def get_supported_modes(self) -> List[RuntimeMode]:
+        """Get supported runtime modes."""
+        return self._supported_modes.copy()
+
+
+# Example integration function
+async def demonstrate_harness_integration():
+    """
+    Demonstrate how external harnesses use PreparedTurnContext.
+    
+    This function shows the complete flow from context preparation
+    to execution across different harness types, proving that the
+    same plan object can be used consistently.
+    """
+    print("Demonstrating PreparedTurnContext with external harnesses...\n")
+    
+    # Mock agent
+    class MockAgent:
+        def __init__(self):
+            self.name = "DemoAgent"
+            self.model = "gpt-3.5-turbo" 
+            self.role = "assistant"
+            self.goal = "demonstrate harnesses"
+            self.tools = []
+            self.chat_history = []
+            self.use_system_prompt = True
+        
+        def _build_system_prompt(self):
+            return f"You are {self.role}. Your goal: {self.goal}"
+
+    agent = MockAgent()
+    
+    # Prepare single context (eliminates scattered preparation)
+    context = default_context_builder.build_context(
+        agent=agent,
+        prompt="Demonstrate harness integration",
+        temperature=0.8,
+        session_id="demo-session"
+    )
+    
+    print(f"Prepared context: {context.to_dict()}\n")
+    
+    # Execute with different harnesses using same context
+    harnesses = [
+        ("Plugin Harness", PluginHarnessRuntime({'add_metadata': True})),
+        ("CLI Backend", CLIBackendHarness({'cli_mode': 'demo'}))
+    ]
+    
+    results = {}
+    for name, harness in harnesses:
+        if harness.supports_runtime_mode(context.runtime_mode):
+            print(f"Executing with {name}...")
+            try:
+                result = await harness.run_turn(context)
+                results[name] = result[:100] + "..." if len(result) > 100 else result
+                print(f"✓ {name} completed\n")
+            except Exception as e:
+                print(f"✗ {name} failed: {e}\n")
+                results[name] = f"Error: {e}"
+        else:
+            print(f"✗ {name} doesn't support {context.runtime_mode.value} mode\n")
+            results[name] = f"Unsupported mode: {context.runtime_mode.value}"
+    
+    # Display results
+    print("Results:")
+    for name, result in results.items():
+        print(f"{name}: {result}")
+    
+    print(f"\n🎉 Demonstrated PreparedTurnContext with {len(harnesses)} external harnesses!")
+    return results
+
+
+if __name__ == "__main__":
+    # Run the demonstration
+    asyncio.run(demonstrate_harness_integration())

src/praisonai-agents/praisonaiagents/runtime/protocols.py

@@ -0,0 +1,110 @@
+"""
+Runtime Protocols for PraisonAI Agents.
+
+This module defines the protocol interfaces that runtime implementations
+must implement. These protocols standardize the execution contract
+across different runtime types (native, plugin, managed, etc.).
+"""
+
+from __future__ import annotations
+
+from typing import Any, List, Protocol, runtime_checkable, TYPE_CHECKING
+
+if TYPE_CHECKING:
+    from .turn_context import PreparedTurnContext, RuntimeMode
+    from ..agent.protocols import AgentProtocol
+
+
+@runtime_checkable
+class TurnRuntimeProtocol(Protocol):
+    """
+    Protocol for turn-based runtime execution.
+    
+    This protocol defines the interface that runtimes must implement to
+    execute prepared turn contexts. It standardizes the execution contract
+    across different runtime types (native, plugin, managed, etc.).
+    
+    Example:
+        ```python
+        class MyRuntime:
+            async def run_turn(self, context: PreparedTurnContext) -> str:
+                # Execute the turn using the prepared context
+                return "response"
+        
+        # Use with prepared context
+        context = PreparedTurnContext(...)
+        runtime = MyRuntime()
+        result = await runtime.run_turn(context)
+        ```
+    """
+    
+    async def run_turn(self, context: PreparedTurnContext) -> str:
+        """
+        Execute a single turn using the prepared context.
+        
+        This is the main execution entry point for all runtime types.
+        The context is immutable and contains all necessary configuration
+        for the turn execution.
+        
+        Args:
+            context: The prepared turn context containing model, tools,
+                    transcript, delivery channels, and correlation IDs
+                    
+        Returns:
+            The agent's response as a string
+            
+        Raises:
+            RuntimeError: If execution fails
+            ValueError: If context is invalid or incompatible
+        """
+        ...
+    
+    def supports_runtime_mode(self, mode: RuntimeMode) -> bool:
+        """
+        Check if this runtime supports the given execution mode.
+        
+        Args:
+            mode: The runtime mode to check
+            
+        Returns:
+            True if the mode is supported, False otherwise
+        """
+        ...
+    
+    def get_supported_modes(self) -> List[RuntimeMode]:
+        """
+        Get all runtime modes supported by this implementation.
+        
+        Returns:
+            List of supported RuntimeMode values
+        """
+        ...
+
+
+@runtime_checkable  
+class TurnContextBuilderProtocol(Protocol):
+    """
+    Protocol for building PreparedTurnContext instances.
+    
+    This protocol defines the interface for context builders that prepare
+    turn contexts from agent configuration and request parameters.
+    """
+    
+    def build_context(
+        self,
+        agent: AgentProtocol,
+        prompt: str,
+        **kwargs: Any
+    ) -> PreparedTurnContext:
+        """
+        Build a prepared turn context from agent and request.
+        
+        Args:
+            agent: The agent instance
+            prompt: The user prompt for this turn
+            **kwargs: Additional request parameters
+            
+        Returns:
+            A prepared turn context ready for execution
+        """
+        ...

src/praisonai-agents/praisonaiagents/runtime/registry.py

@@ -0,0 +1,227 @@
+"""Runtime registry protocol for PraisonAI Agents.
+
+Protocol-driven design following AGENTS.md:
+- Core protocols only (no heavy implementations)
+- Registry pattern for runtime resolution
+- Fail-closed behavior for unknown runtime IDs
+"""
+
+import threading
+from typing import Protocol, Dict, Any, Optional, List, runtime_checkable
+from dataclasses import dataclass
+
+
+@dataclass
+class RuntimeRegistryEntry:
+    """Entry in the runtime registry containing runtime metadata."""
+    runtime_id: str
+    display_name: Optional[str] = None
+    description: Optional[str] = None
+    is_builtin: bool = False
+    metadata: Dict[str, Any] = None
+    
+    def __post_init__(self):
+        if self.metadata is None:
+            self.metadata = {}
+        if self.display_name is None:
+            self.display_name = self.runtime_id
+
+
+@runtime_checkable
+class RuntimeRegistry(Protocol):
+    """Protocol for runtime registries.
+    
+    Defines the interface for registering and resolving agent runtimes.
+    The actual implementation lives in the wrapper layer.
+    """
+    
+    def register(self, runtime_id: str, factory_or_instance: Any, **metadata) -> None:
+        """Register a runtime with the registry.
+        
+        Args:
+            runtime_id: Unique runtime identifier (e.g., "claude-code")
+            factory_or_instance: Runtime factory function or instance
+            **metadata: Additional metadata for the runtime
+        
+        Raises:
+            ValueError: If runtime_id is already registered
+            TypeError: If factory_or_instance is not callable or valid instance
+        """
+        ...
+    
+    def unregister(self, runtime_id: str) -> bool:
+        """Unregister a runtime from the registry.
+        
+        Args:
+            runtime_id: Runtime identifier to unregister
+            
+        Returns:
+            True if runtime was unregistered, False if not found
+        """
+        ...
+    
+    def is_registered(self, runtime_id: str) -> bool:
+        """Check if a runtime is registered.
+        
+        Args:
+            runtime_id: Runtime identifier to check
+            
+        Returns:
+            True if runtime is registered, False otherwise
+        """
+        ...
+    
+    def list_runtimes(self) -> List[RuntimeRegistryEntry]:
+        """List all registered runtimes.
+        
+        Returns:
+            List of RuntimeRegistryEntry objects for all registered runtimes
+        """
+        ...
+    
+    def get_entry(self, runtime_id: str) -> Optional[RuntimeRegistryEntry]:
+        """Get registry entry for a runtime.
+        
+        Args:
+            runtime_id: Runtime identifier
+            
+        Returns:
+            RuntimeRegistryEntry if found, None otherwise
+        """
+        ...
+    
+    def resolve(self, runtime_id: str, config_overrides: Optional[Dict[str, Any]] = None) -> Any:
+        """Resolve a runtime by ID with optional configuration overrides.
+        
+        Args:
+            runtime_id: Runtime identifier to resolve
+            config_overrides: Optional configuration overrides
+            
+        Returns:
+            Runtime instance (typically implementing CliBackendProtocol)
+            
+        Raises:
+            ValueError: If runtime_id is not registered (fail-closed behavior)
+            TypeError: If runtime cannot be instantiated
+        """
+        ...
+    
+    def clear(self) -> None:
+        """Clear all registered runtimes.
+        
+        Used primarily for testing and cleanup.
+        """
+        ...
+
+
+# Global registry instance - will be initialized by wrapper layer
+_global_registry: Optional[RuntimeRegistry] = None
+_registry_lock = threading.Lock()
+
+
+def set_global_registry(registry: RuntimeRegistry) -> None:
+    """Set the global runtime registry instance.
+    
+    This is called by the wrapper layer to inject the actual registry implementation.
+    
+    Args:
+        registry: RuntimeRegistry implementation
+        
+    Raises:
+        TypeError: If registry doesn't implement RuntimeRegistry protocol
+    """
+    global _global_registry
+    
+    if not isinstance(registry, RuntimeRegistry):
+        raise TypeError("registry must implement RuntimeRegistry protocol")
+    
+    with _registry_lock:
+        _global_registry = registry
+
+
+def get_global_registry() -> Optional[RuntimeRegistry]:
+    """Get the global runtime registry instance.
+    
+    Returns:
+        RuntimeRegistry instance if set, None otherwise
+    """
+    with _registry_lock:
+        return _global_registry
+
+
+def register_runtime(runtime_id: str, factory_or_instance: Any, **metadata) -> None:
+    """Register a runtime with the global registry.
+    
+    Args:
+        runtime_id: Unique runtime identifier
+        factory_or_instance: Runtime factory function or instance  
+        **metadata: Additional metadata for the runtime
+        
+    Raises:
+        RuntimeError: If global registry is not initialized
+        ValueError: If runtime_id is already registered
+    """
+    registry = get_global_registry()
+    if registry is None:
+        raise RuntimeError(
+            "Global runtime registry not initialized. "
+            "This should be done by the wrapper layer."
+        )
+    
+    registry.register(runtime_id, factory_or_instance, **metadata)
+
+
+def resolve_runtime(
+    runtime_id: str, 
+    config_overrides: Optional[Dict[str, Any]] = None
+) -> Any:
+    """Resolve a runtime by ID using the global registry.
+    
+    Args:
+        runtime_id: Runtime identifier to resolve
+        config_overrides: Optional configuration overrides
+        
+    Returns:
+        Runtime instance
+        
+    Raises:
+        RuntimeError: If global registry is not initialized
+        ValueError: If runtime_id is not registered (fail-closed behavior)
+    """
+    registry = get_global_registry()
+    if registry is None:
+        raise RuntimeError(
+            "Global runtime registry not initialized. "
+            "This should be done by the wrapper layer."
+        )
+    
+    return registry.resolve(runtime_id, config_overrides)
+
+
+def list_available_runtimes() -> List[RuntimeRegistryEntry]:
+    """List all available runtimes from the global registry.
+    
+    Returns:
+        List of RuntimeRegistryEntry objects, empty list if registry not initialized
+    """
+    registry = get_global_registry()
+    if registry is None:
+        return []
+    
+    return registry.list_runtimes()
+
+
+def is_runtime_available(runtime_id: str) -> bool:
+    """Check if a runtime is available in the global registry.
+    
+    Args:
+        runtime_id: Runtime identifier to check
+        
+    Returns:
+        True if runtime is available, False otherwise
+    """
+    registry = get_global_registry()
+    if registry is None:
+        return False
+    
+    return registry.is_registered(runtime_id)

src/praisonai-agents/praisonaiagents/runtime/resolver.py

@@ -0,0 +1,295 @@
+"""Runtime resolver with resolution order implementation.
+
+Implements the resolution order:
+per-model runtime → per-provider default → auto → built-in default
+
+Protocol-driven design following AGENTS.md:
+- Core resolution logic without heavy implementations
+- Fail-closed behavior for unknown runtime IDs
+- Integration with model resolution system
+"""
+
+from typing import Optional, Dict, Any, Union, TYPE_CHECKING
+from dataclasses import dataclass
+import warnings
+
+if TYPE_CHECKING:
+    from .config import AgentRuntimeConfig
+    from ..cli_backend.protocols import CliBackendProtocol
+
+
+@dataclass
+class RuntimeResolutionContext:
+    """Context for runtime resolution containing model and provider information."""
+    model_name: Optional[str] = None
+    provider_name: Optional[str] = None
+    model_config: Optional[Dict[str, Any]] = None
+    provider_config: Optional[Dict[str, Any]] = None
+    agent_config: Optional[Dict[str, Any]] = None
+    metadata: Dict[str, Any] = None
+    
+    def __post_init__(self):
+        if self.metadata is None:
+            self.metadata = {}
+
+
+@dataclass
+class RuntimeResolutionResult:
+    """Result of runtime resolution containing the resolved runtime and metadata."""
+    runtime: Any  # CliBackendProtocol instance
+    runtime_id: str
+    resolution_source: str  # "model", "provider", "auto", "default", "legacy"
+    config_used: Optional["AgentRuntimeConfig"] = None
+    metadata: Dict[str, Any] = None
+    
+    def __post_init__(self):
+        if self.metadata is None:
+            self.metadata = {}
+
+
+class RuntimeResolver:
+    """Core runtime resolver implementing resolution order logic.
+    
+    This is the core resolver that implements the resolution order without
+    heavy dependencies. The actual runtime instantiation is delegated to
+    the registry (which lives in the wrapper layer).
+    """
+    
+    def __init__(self, default_runtime_id: str = "praisonai"):
+        """Initialize runtime resolver.
+        
+        Args:
+            default_runtime_id: Default runtime ID if no other runtime is found
+        """
+        self.default_runtime_id = default_runtime_id
+    
+    def resolve_runtime_config(
+        self,
+        context: RuntimeResolutionContext,
+        model_runtime_configs: Optional[Dict[str, "AgentRuntimeConfig"]] = None,
+        provider_runtime_configs: Optional[Dict[str, "AgentRuntimeConfig"]] = None,
+        legacy_cli_backend: Optional[Union[str, Any]] = None,
+    ) -> "AgentRuntimeConfig":
+        """Resolve runtime configuration based on resolution order.
+        
+        Resolution order:
+        1. per-model runtime (model_runtime_configs[model_name])
+        2. per-provider default (provider_runtime_configs[provider_name])  
+        3. auto-selection (if enabled and available)
+        4. built-in default (self.default_runtime_id)
+        5. legacy cli_backend (with deprecation warning)
+        
+        Args:
+            context: Runtime resolution context
+            model_runtime_configs: Per-model runtime configurations
+            provider_runtime_configs: Per-provider runtime configurations  
+            legacy_cli_backend: Legacy agent-level cli_backend (deprecated)
+            
+        Returns:
+            AgentRuntimeConfig for the resolved runtime
+        """
+        from .config import AgentRuntimeConfig
+        
+        # Normalize inputs
+        model_runtime_configs = model_runtime_configs or {}
+        provider_runtime_configs = provider_runtime_configs or {}
+        
+        # 1. Check per-model runtime configuration
+        if context.model_name and context.model_name in model_runtime_configs:
+            source_config = model_runtime_configs[context.model_name]
+            if source_config.is_explicit():
+                # Create a copy to avoid mutating the original
+                config = AgentRuntimeConfig(
+                    runtime=source_config.runtime,
+                    config_overrides=source_config.config_overrides.copy(),
+                    provider_default=source_config.provider_default,
+                    enable_auto_selection=source_config.enable_auto_selection,
+                    metadata=source_config.metadata.copy(),
+                )
+                config.metadata["resolution_source"] = "model"
+                return config
+        
+        # 2. Check per-provider runtime configuration
+        if context.provider_name and context.provider_name in provider_runtime_configs:
+            source_config = provider_runtime_configs[context.provider_name]
+            if source_config.is_explicit():
+                # Create a copy to avoid mutating the original
+                config = AgentRuntimeConfig(
+                    runtime=source_config.runtime,
+                    config_overrides=source_config.config_overrides.copy(),
+                    provider_default=source_config.provider_default,
+                    enable_auto_selection=source_config.enable_auto_selection,
+                    metadata=source_config.metadata.copy(),
+                )
+                config.metadata["resolution_source"] = "provider"
+                return config
+        
+        # 3. Auto-selection (placeholder for future implementation)
+        # This would check if auto-selection is enabled and delegate to auto-selection logic
+        auto_config = self._try_auto_selection(context)
+        if auto_config is not None:
+            auto_config.metadata["resolution_source"] = "auto"
+            return auto_config
+        
+        # 4. Built-in default takes precedence over legacy
+        default_config = AgentRuntimeConfig.from_runtime_id(self.default_runtime_id)
+        default_config.metadata["resolution_source"] = "default"
+        
+        # 5. Legacy cli_backend support (with deprecation warning) - lowest priority
+        if legacy_cli_backend is not None:
+            warnings.warn(
+                "Agent-level 'cli_backend' parameter is deprecated. "
+                "Use model-scoped runtime configuration instead. "
+                "See documentation for migration guide.",
+                DeprecationWarning,
+                stacklevel=3
+            )
+            
+            # Only use legacy if no default is available
+            # In practice, default is always available, so this preserves existing behavior
+            # while maintaining correct priority order in the spec
+            if self.default_runtime_id is None:
+                # Convert legacy cli_backend to runtime config
+                if isinstance(legacy_cli_backend, str):
+                    legacy_config = AgentRuntimeConfig.from_runtime_id(legacy_cli_backend)
+                else:
+                    # Assume it's already a config or protocol instance
+                    legacy_config = AgentRuntimeConfig(runtime="legacy")
+                    legacy_config.config_overrides["instance"] = legacy_cli_backend
+                
+                legacy_config.metadata["resolution_source"] = "legacy"
+                return legacy_config
+        
+        return default_config
+    
+    def _try_auto_selection(
+        self, 
+        context: RuntimeResolutionContext
+    ) -> Optional["AgentRuntimeConfig"]:
+        """Try auto-selection of runtime based on context.
+        
+        This is a placeholder for future auto-selection logic.
+        The actual implementation would analyze the model, provider,
+        and context to automatically select an appropriate runtime.
+        
+        Args:
+            context: Runtime resolution context
+            
+        Returns:
+            AgentRuntimeConfig if auto-selection succeeds, None otherwise
+        """
+        # Placeholder for auto-selection logic
+        # Future implementation could:
+        # - Check if model supports specific runtimes
+        # - Look at provider capabilities
+        # - Consider context metadata
+        # - Use ML-based selection
+        
+        return None
+    
+    def resolve_runtime_instance(
+        self,
+        context: RuntimeResolutionContext,
+        model_runtime_configs: Optional[Dict[str, "AgentRuntimeConfig"]] = None,
+        provider_runtime_configs: Optional[Dict[str, "AgentRuntimeConfig"]] = None,
+        legacy_cli_backend: Optional[Union[str, Any]] = None,
+    ) -> RuntimeResolutionResult:
+        """Resolve runtime instance based on configuration and context.
+        
+        This method combines configuration resolution with actual runtime
+        instantiation using the global registry.
+        
+        Args:
+            context: Runtime resolution context
+            model_runtime_configs: Per-model runtime configurations
+            provider_runtime_configs: Per-provider runtime configurations
+            legacy_cli_backend: Legacy agent-level cli_backend (deprecated)
+            
+        Returns:
+            RuntimeResolutionResult with resolved runtime instance
+            
+        Raises:
+            ValueError: If runtime ID is not registered (fail-closed behavior)
+            RuntimeError: If global registry is not initialized
+        """
+        from .registry import resolve_runtime
+        
+        # Resolve configuration
+        config = self.resolve_runtime_config(
+            context=context,
+            model_runtime_configs=model_runtime_configs,
+            provider_runtime_configs=provider_runtime_configs,
+            legacy_cli_backend=legacy_cli_backend,
+        )
+        
+        # Handle legacy instances that are already resolved
+        if (config.metadata.get("resolution_source") == "legacy" and 
+            "instance" in config.config_overrides):
+            instance = config.config_overrides["instance"]
+            return RuntimeResolutionResult(
+                runtime=instance,
+                runtime_id="legacy",
+                resolution_source="legacy",
+                config_used=config,
+                metadata={"legacy_instance": True}
+            )
+        
+        # Resolve runtime instance using global registry
+        if config.runtime is None:
+            raise ValueError("No runtime ID available for resolution")
+        
+        try:
+            runtime_instance = resolve_runtime(
+                runtime_id=config.runtime,
+                config_overrides=config.config_overrides
+            )
+            
+            return RuntimeResolutionResult(
+                runtime=runtime_instance,
+                runtime_id=config.runtime,
+                resolution_source=config.metadata.get("resolution_source", "unknown"),
+                config_used=config,
+                metadata=config.metadata.copy()
+            )
+            
+        except ValueError as e:
+            # Enhance error message with available runtimes
+            from .registry import list_available_runtimes
+            available = [entry.runtime_id for entry in list_available_runtimes()]
+            raise ValueError(
+                f"Unknown runtime ID: {config.runtime}. Available runtimes: {available}. "
+                f"Original error: {e}"
+            ) from e
+    
+    def validate_runtime_config(
+        self, 
+        config: "AgentRuntimeConfig"
+    ) -> None:
+        """Validate a runtime configuration.
+        
+        Args:
+            config: Runtime configuration to validate
+            
+        Raises:
+            ValueError: If runtime configuration is invalid
+            TypeError: If runtime configuration has invalid types
+        """
+        if not hasattr(config, 'runtime'):
+            raise TypeError("Runtime configuration must have 'runtime' attribute")
+        
+        if config.runtime is not None:
+            if not isinstance(config.runtime, str):
+                raise TypeError("Runtime ID must be a string")
+            
+            if not config.runtime.strip():
+                raise ValueError("Runtime ID cannot be empty")
+        
+        if not isinstance(config.config_overrides, dict):
+            raise TypeError("config_overrides must be a dictionary")
+        
+        if config.metadata is not None and not isinstance(config.metadata, dict):
+            raise TypeError("metadata must be a dictionary")
+
+
+# Default resolver instance
+default_resolver = RuntimeResolver()

src/praisonai-agents/praisonaiagents/runtime/test_turn_context.py

@@ -0,0 +1,329 @@
+"""
+Test suite for PreparedTurnContext and runtime components.
+
+This module provides tests to verify the turn context implementation
+works correctly and maintains backward compatibility.
+"""
+
+import asyncio
+import pytest
+from typing import List, Dict, Any
+from unittest.mock import Mock, patch
+
+from .turn_context import (
+    PreparedTurnContext,
+    ModelReference,
+    ToolSchema, 
+    TranscriptWindow,
+    DeliveryChannels,
+    SessionCorrelation,
+    RuntimeMode,
+    create_default_model_ref,
+    create_empty_transcript,
+    create_default_delivery,
+    create_session_correlation,
+)
+from .context_builder import DefaultTurnContextBuilder
+
+
+class MockAgent:
+    """Mock agent for testing context building."""
+    
+    def __init__(self):
+        self.name = "TestAgent"
+        self.model = "gpt-3.5-turbo"
+        self.tools = []
+        self.chat_history = []
+        self.role = "assistant"
+        self.goal = "help users"
+        self.use_system_prompt = True
+    
+    def _build_system_prompt(self):
+        return f"You are {self.role}. Your goal: {self.goal}"
+
+
+class MockRuntime:
+    """Mock runtime for testing execution."""
+    
+    def __init__(self):
+        self.executed_contexts = []
+    
+    async def run_turn(self, context: PreparedTurnContext) -> str:
+        self.executed_contexts.append(context)
+        return f"Response to: {context.correlation.turn_id}"
+    
+    def supports_runtime_mode(self, mode: RuntimeMode) -> bool:
+        return True
+    
+    def get_supported_modes(self) -> List[RuntimeMode]:
+        return list(RuntimeMode)
+
+
+def test_model_reference_creation():
+    """Test ModelReference creation and validation."""
+    # Test valid reference
+    model_ref = ModelReference(
+        model_id="gpt-4",
+        provider="openai",
+        supports_streaming=True,
+        supports_tools=True,
+        temperature=0.7
+    )
+    
+    assert model_ref.model_id == "gpt-4"
+    assert model_ref.provider == "openai"
+    assert model_ref.supports_streaming is True
+    assert model_ref.temperature == 0.7
+    
+    # Test validation
+    with pytest.raises(ValueError, match="model_id is required"):
+        ModelReference(model_id="", provider="openai")
+
+
+def test_tool_schema_creation():
+    """Test ToolSchema creation and validation."""
+    tool = ToolSchema(
+        name="test_tool",
+        description="A test tool",
+        parameters={"type": "object", "properties": {}},
+        source_type="function"
+    )
+    
+    assert tool.name == "test_tool"
+    assert tool.source_type == "function"
+    
+    # Test validation
+    with pytest.raises(ValueError, match="Tool name is required"):
+        ToolSchema(name="", description="test", parameters={})
+
+
+def test_transcript_window():
+    """Test TranscriptWindow creation."""
+    messages = [
+        {"role": "user", "content": "Hello"},
+        {"role": "assistant", "content": "Hi there!"}
+    ]
+    
+    transcript = TranscriptWindow(
+        messages=messages,
+        total_tokens=20,
+        system_prompt="You are helpful"
+    )
+    
+    assert len(transcript.messages) == 2
+    assert transcript.total_tokens == 20
+    assert transcript.system_prompt == "You are helpful"
+
+
+def test_prepared_turn_context():
+    """Test PreparedTurnContext creation and validation."""
+    model_ref = create_default_model_ref()
+    agent = MockAgent()
+    tools = []
+    transcript = create_empty_transcript()
+    delivery = create_default_delivery()
+    correlation = create_session_correlation()
+    
+    context = PreparedTurnContext(
+        model_ref=model_ref,
+        agent_runtime=agent,
+        tools=tools,
+        transcript=transcript,
+        delivery=delivery,
+        correlation=correlation,
+        runtime_mode=RuntimeMode.SYNC
+    )
+    
+    assert context.model_ref.model_id == "gpt-3.5-turbo"
+    assert context.runtime_mode == RuntimeMode.SYNC
+    assert context.has_tools() is False
+    assert context.get_message_count() == 0
+    
+    # Test dict conversion
+    context_dict = context.to_dict()
+    assert "model_id" in context_dict
+    assert "tools_count" in context_dict
+    assert context_dict["tools_count"] == 0
+
+
+def test_context_builder():
+    """Test DefaultTurnContextBuilder functionality."""
+    builder = DefaultTurnContextBuilder()
+    agent = MockAgent()
+    
+    # Test basic context building
+    context = builder.build_context(
+        agent=agent,
+        prompt="Hello, world!",
+        temperature=0.7,
+        stream=False
+    )
+    
+    assert isinstance(context, PreparedTurnContext)
+    assert context.model_ref.model_id == "gpt-3.5-turbo"
+    assert context.model_ref.temperature == 0.7
+    assert context.runtime_mode == RuntimeMode.SYNC
+    
+    # Check transcript contains prompt
+    user_messages = [msg for msg in context.transcript.messages if msg.get('role') == 'user']
+    assert len(user_messages) == 1
+    assert user_messages[0]['content'] == "Hello, world!"
+
+
+def test_context_builder_with_streaming():
+    """Test context building with streaming enabled."""
+    builder = DefaultTurnContextBuilder()
+    agent = MockAgent()
+    
+    context = builder.build_context(
+        agent=agent,
+        prompt="Stream test",
+        stream=True,
+        async_execution=False
+    )
+    
+    assert context.runtime_mode == RuntimeMode.STREAM
+    assert context.delivery.enable_streaming is True
+
+
+def test_context_builder_with_async():
+    """Test context building with async execution."""
+    builder = DefaultTurnContextBuilder()
+    agent = MockAgent()
+    
+    context = builder.build_context(
+        agent=agent,
+        prompt="Async test",
+        stream=False,
+        async_execution=True
+    )
+    
+    assert context.runtime_mode == RuntimeMode.ASYNC
+
+
+def test_context_builder_with_tools():
+    """Test context building with tools."""
+    def test_function(query: str) -> str:
+        """A test function."""
+        return f"Result for {query}"
+    
+    builder = DefaultTurnContextBuilder()
+    agent = MockAgent()
+    agent.tools = [test_function]
+    
+    context = builder.build_context(
+        agent=agent,
+        prompt="Use tools",
+        tools=None  # Should use agent.tools
+    )
+    
+    assert len(context.tools) == 1
+    assert context.tools[0].name == "test_function"
+    assert context.tools[0].source_type == "function"
+    assert context.tools[0].callable == test_function
+
+
+def test_context_immutability():
+    """Test that PreparedTurnContext is immutable."""
+    builder = DefaultTurnContextBuilder()
+    agent = MockAgent()
+    
+    context = builder.build_context(agent=agent, prompt="Test")
+    
+    # Should not be able to modify the context attributes
+    with pytest.raises(AttributeError):
+        context.model_ref = create_default_model_ref("gpt-4")
+    
+    # Tools should be a tuple (immutable)
+    assert isinstance(context.tools, tuple)
+    
+    # Messages should be tuple of immutable mappings
+    assert isinstance(context.transcript.messages, tuple)
+    if context.transcript.messages:
+        # Each message should be immutable
+        assert hasattr(context.transcript.messages[0], 'keys')  # Is mapping-like
+
+
+@pytest.mark.asyncio
+async def test_runtime_execution():
+    """Test runtime execution with prepared context."""
+    builder = DefaultTurnContextBuilder()
+    agent = MockAgent()
+    runtime = MockRuntime()
+    
+    # Build context
+    context = builder.build_context(
+        agent=agent,
+        prompt="Execute this",
+        session_id="test-session"
+    )
+    
+    # Execute with runtime
+    response = await runtime.run_turn(context)
+    
+    assert isinstance(response, str)
+    assert len(runtime.executed_contexts) == 1
+    assert runtime.executed_contexts[0].correlation.session_id == "test-session"
+
+
+def test_utility_functions():
+    """Test utility functions for creating context components."""
+    # Test create_default_model_ref
+    model_ref = create_default_model_ref("claude-3", "anthropic")
+    assert model_ref.model_id == "claude-3"
+    assert model_ref.provider == "anthropic"
+    
+    # Test create_empty_transcript
+    transcript = create_empty_transcript("System prompt")
+    assert len(transcript.messages) == 0
+    assert transcript.system_prompt == "System prompt"
+    
+    # Test create_default_delivery
+    delivery = create_default_delivery()
+    assert delivery.enable_streaming is False
+    
+    # Test create_session_correlation
+    correlation = create_session_correlation("session-123", "agent-456")
+    assert correlation.session_id == "session-123"
+    assert correlation.agent_id == "agent-456"
+    assert correlation.turn_id.startswith("turn-")
+
+
+def test_runtime_mode_validation():
+    """Test runtime mode validation in context."""
+    # Test that streaming mode requires streaming configuration
+    with pytest.raises(ValueError, match="requires streaming configuration"):
+        PreparedTurnContext(
+            model_ref=create_default_model_ref(),
+            agent_runtime=MockAgent(),
+            tools=(),
+            transcript=create_empty_transcript(),
+            delivery=create_default_delivery(),  # No streaming
+            correlation=create_session_correlation(),
+            runtime_mode=RuntimeMode.STREAM  # But stream mode requested
+        )
+
+
+if __name__ == "__main__":
+    # Run basic tests without pytest
+    print("Running basic tests...")
+    
+    test_model_reference_creation()
+    print("✓ ModelReference tests passed")
+    
+    test_tool_schema_creation()
+    print("✓ ToolSchema tests passed")
+    
+    test_transcript_window()
+    print("✓ TranscriptWindow tests passed")
+    
+    test_prepared_turn_context()
+    print("✓ PreparedTurnContext tests passed")
+    
+    test_context_builder()
+    print("✓ Context builder tests passed")
+    
+    test_utility_functions()
+    print("✓ Utility function tests passed")
+    
+    print("All basic tests completed!")

src/praisonai-agents/praisonaiagents/runtime/turn_context.py

@@ -0,0 +1,312 @@
+"""
+Turn Context and Runtime Protocol for PraisonAI Agents.
+
+This module defines the PreparedTurnContext dataclass and TurnRuntimeProtocol
+that standardize runtime preparation across different execution paths in the
+PraisonAI agent framework.
+
+Design Goals:
+- Single immutable plan object passed into runtime run_turn
+- Standardize tool assembly, transcript building, and delivery channels
+- Eliminate duplication between native loop and plugin harnesses
+- Enable consistent metrics and tracing across harness types
+- Multi-agent safe: context is per-turn, not stored on shared agent globals
+"""
+
+from __future__ import annotations
+
+from dataclasses import dataclass, field
+from typing import Any, Dict, List, Optional, Union, TYPE_CHECKING, Tuple, Mapping
+from types import MappingProxyType
+from enum import Enum
+import time
+import logging
+
+if TYPE_CHECKING:
+    from ..agent.protocols import AgentProtocol
+    from ..streaming.events import StreamEventEmitter
+
+logger = logging.getLogger(__name__)
+
+
+class RuntimeMode(Enum):
+    """Execution mode for the runtime."""
+    SYNC = "sync"
+    ASYNC = "async"
+    STREAM = "stream"
+    ASYNC_STREAM = "async_stream"
+
+
+@dataclass(frozen=True)
+class ModelReference:
+    """
+    Immutable reference to a resolved model configuration.
+    
+    Captures model ID, provider, capabilities, and configuration
+    resolved at turn preparation time.
+    """
+    model_id: str
+    provider: str
+    supports_streaming: bool = False
+    supports_tools: bool = False
+    supports_system_prompts: bool = True
+    max_tokens: Optional[int] = None
+    temperature: Optional[float] = None
+    model_config: Mapping[str, Any] = field(default_factory=dict)
+    
+    def __post_init__(self):
+        """Validate model reference and ensure immutability."""
+        if not self.model_id:
+            raise ValueError("model_id is required")
+        if not self.provider:
+            raise ValueError("provider is required")
+        
+        # Make model_config immutable
+        if not isinstance(self.model_config, MappingProxyType):
+            object.__setattr__(self, 'model_config', MappingProxyType(self.model_config))
+
+
+@dataclass(frozen=True)
+class ToolSchema:
+    """
+    Normalized tool schema for runtime execution.
+    
+    Provides a consistent tool representation regardless of source
+    (function decorators, OpenAI format, custom tools, etc.).
+    """
+    name: str
+    description: str
+    parameters: Dict[str, Any]
+    callable: Optional[Any] = None
+    source_type: str = "unknown"  # function, openai, custom, etc.
+    metadata: Mapping[str, Any] = field(default_factory=dict)
+    
+    def __post_init__(self):
+        """Validate tool schema and ensure immutability."""
+        if not self.name:
+            raise ValueError("Tool name is required")
+        if not self.description:
+            raise ValueError("Tool description is required")
+        
+        # Make metadata immutable
+        if not isinstance(self.metadata, MappingProxyType):
+            object.__setattr__(self, 'metadata', MappingProxyType(self.metadata))
+
+
+@dataclass(frozen=True)
+class TranscriptWindow:
+    """
+    Immutable transcript window for a turn.
+    
+    Contains the conversation history slice to be included in the current
+    turn, with token budgeting and context optimization applied.
+    """
+    messages: Tuple[Mapping[str, Any], ...]
+    total_tokens: int = 0
+    system_prompt: Optional[str] = None
+    context_metadata: Mapping[str, Any] = field(default_factory=dict)
+    
+    def __post_init__(self):
+        """Validate transcript window and ensure immutability."""
+        # Convert to tuple of immutable mappings if needed
+        if not isinstance(self.messages, tuple):
+            immutable_messages = tuple(
+                MappingProxyType(msg) if isinstance(msg, dict) else msg
+                for msg in self.messages
+            )
+            object.__setattr__(self, 'messages', immutable_messages)
+        
+        # Make context_metadata immutable
+        if not isinstance(self.context_metadata, MappingProxyType):
+            object.__setattr__(self, 'context_metadata', MappingProxyType(self.context_metadata))
+
+
+@dataclass(frozen=True)
+class DeliveryChannels:
+    """
+    Delivery channels for runtime execution results.
+    
+    Encapsulates streaming handles, callbacks, and output formatting
+    configuration for the current turn.
+    """
+    stream_emitter: Optional[StreamEventEmitter] = None
+    output_formatter: Optional[Any] = None
+    callbacks: Tuple[Any, ...] = field(default_factory=tuple)
+    async_callbacks: Tuple[Any, ...] = field(default_factory=tuple)
+    enable_streaming: bool = False
+    enable_metrics: bool = False
+    
+    def __post_init__(self):
+        """Ensure immutability of list fields."""
+        # Convert lists to tuples if needed
+        if isinstance(self.callbacks, list):
+            object.__setattr__(self, 'callbacks', tuple(self.callbacks))
+        if isinstance(self.async_callbacks, list):
+            object.__setattr__(self, 'async_callbacks', tuple(self.async_callbacks))
+    
+    def has_streaming(self) -> bool:
+        """Check if streaming is configured and enabled."""
+        return self.enable_streaming
+
+
+@dataclass(frozen=True)
+class SessionCorrelation:
+    """
+    Session correlation identifiers for tracing and debugging.
+    
+    Provides correlation IDs to track requests across distributed
+    agent execution and multi-turn conversations.
+    """
+    session_id: Optional[str] = None
+    turn_id: Optional[str] = None
+    agent_id: Optional[str] = None
+    run_id: Optional[str] = None
+    parent_id: Optional[str] = None
+    trace_metadata: Mapping[str, Any] = field(default_factory=dict)
+    
+    def __post_init__(self):
+        """Ensure immutability of metadata fields."""
+        if not isinstance(self.trace_metadata, MappingProxyType):
+            object.__setattr__(self, 'trace_metadata', MappingProxyType(self.trace_metadata))
+
+
+@dataclass(frozen=True)
+class PreparedTurnContext:
+    """
+    Immutable turn plan object for standardized runtime execution.
+    
+    This dataclass captures all the context needed for a single agent turn,
+    prepared in a preflight step before run_attempt. It eliminates the
+    scattered tool assembly and message building across different execution
+    paths.
+    
+    The context is read-only during execution - mutations must go through
+    defined hooks only. This ensures consistent behavior across different
+    runtime harnesses (native, plugin, managed, etc.).
+    
+    Attributes:
+        model_ref: Resolved model configuration and capabilities
+        agent_runtime: The runtime protocol instance to execute with
+        tools: Normalized tool schemas for the turn
+        transcript: Prepared conversation window for the turn
+        delivery: Streaming and output delivery configuration
+        correlation: Session and tracing identifiers
+        runtime_mode: Execution mode (sync/async/stream)
+        turn_metadata: Additional turn-specific metadata
+        created_at: Timestamp when context was prepared
+    """
+    model_ref: ModelReference
+    agent_runtime: AgentProtocol
+    tools: Tuple[ToolSchema, ...]
+    transcript: TranscriptWindow
+    delivery: DeliveryChannels
+    correlation: SessionCorrelation
+    runtime_mode: RuntimeMode = RuntimeMode.SYNC
+    turn_metadata: Mapping[str, Any] = field(default_factory=dict)
+    created_at: float = field(default_factory=time.time)
+    
+    def __post_init__(self):
+        """Validate the prepared turn context and ensure immutability."""
+        # Convert tools to tuple if needed
+        if not isinstance(self.tools, tuple):
+            object.__setattr__(self, 'tools', tuple(self.tools))
+        
+        # Make turn_metadata immutable
+        if not isinstance(self.turn_metadata, MappingProxyType):
+            object.__setattr__(self, 'turn_metadata', MappingProxyType(self.turn_metadata))
+        
+        # Validate runtime mode compatibility
+        if self.runtime_mode in (RuntimeMode.STREAM, RuntimeMode.ASYNC_STREAM):
+            if not self.delivery.has_streaming():
+                raise ValueError(
+                    f"Runtime mode {self.runtime_mode.value} requires streaming configuration"
+                )
+        
+        # Validate model supports required features
+        if self.tools and not self.model_ref.supports_tools:
+            logger.warning(
+                f"Model {self.model_ref.model_id} does not support tools, "
+                f"but {len(self.tools)} tools were provided"
+            )
+    
+    def get_tool_by_name(self, name: str) -> Optional[ToolSchema]:
+        """Get a tool by name from the prepared tools."""
+        for tool in self.tools:
+            if tool.name == name:
+                return tool
+        return None
+    
+    def has_tools(self) -> bool:
+        """Check if any tools are available for this turn."""
+        return len(self.tools) > 0
+    
+    def has_system_prompt(self) -> bool:
+        """Check if a system prompt is configured."""
+        return self.transcript.system_prompt is not None
+    
+    def get_message_count(self) -> int:
+        """Get the number of messages in the transcript window."""
+        return len(self.transcript.messages)
+    
+    def to_dict(self) -> Dict[str, Any]:
+        """Convert to dictionary for logging and debugging."""
+        return {
+            "model_id": self.model_ref.model_id,
+            "provider": self.model_ref.provider,
+            "tools_count": len(self.tools),
+            "message_count": self.get_message_count(),
+            "has_system_prompt": self.has_system_prompt(),
+            "runtime_mode": self.runtime_mode.value,
+            "streaming_enabled": self.delivery.has_streaming(),
+            "session_id": self.correlation.session_id,
+            "turn_id": self.correlation.turn_id,
+            "created_at": self.created_at,
+        }
+
+
+
+# Utility functions for context building
+
+def create_default_model_ref(
+    model_id: str = "gpt-3.5-turbo",
+    provider: str = "openai"
+) -> ModelReference:
+    """Create a default ModelReference for testing and basic usage."""
+    return ModelReference(
+        model_id=model_id,
+        provider=provider,
+        supports_streaming=True,
+        supports_tools=True,
+        supports_system_prompts=True,
+    )
+
+
+def create_empty_transcript(
+    system_prompt: Optional[str] = None
+) -> TranscriptWindow:
+    """Create an empty transcript window with optional system prompt."""
+    return TranscriptWindow(
+        messages=[],
+        system_prompt=system_prompt,
+    )
+
+
+def create_default_delivery() -> DeliveryChannels:
+    """Create default delivery channels with no streaming."""
+    return DeliveryChannels(
+        enable_streaming=False,
+        enable_metrics=False,
+    )
+
+
+def create_session_correlation(
+    session_id: Optional[str] = None,
+    agent_id: Optional[str] = None
+) -> SessionCorrelation:
+    """Create session correlation with basic IDs."""
+    import uuid
+    return SessionCorrelation(
+        session_id=session_id or f"session-{uuid.uuid4().hex[:8]}",
+        turn_id=f"turn-{uuid.uuid4().hex[:8]}",
+        agent_id=agent_id,
+    )

src/praisonai-agents/praisonaiagents/server/server.py

@@ -117,6 +117,16 @@ class AgentServer:
         self._server_thread: Optional[threading.Thread] = None
         self._app = None
         self._server = None
+
+    def _authorise_request(self, request) -> bool:
+        """Verify bearer token when auth_token is configured."""
+        token = self.config.auth_token
+        if not token:
+            return True
+        auth = request.headers.get("Authorization", "")
+        if auth.startswith("Bearer ") and auth[7:] == token:
+            return True
+        return request.headers.get("X-Auth-Token") == token
     
     def _create_app(self):
         """Create the ASGI application."""
@@ -137,6 +147,8 @@ class AgentServer:
             })
         
         async def events(request):
+            if not self._authorise_request(request):
+                return JSONResponse({"error": "Unauthorized"}, status_code=401)
             client_id = str(uuid.uuid4())
             client = SSEClient(client_id)
             self._clients[client_id] = client
@@ -162,6 +174,8 @@ class AgentServer:
             )
         
         async def publish(request):
+            if not self._authorise_request(request):
+                return JSONResponse({"error": "Unauthorized"}, status_code=401)
             try:
                 data = await request.json()
                 event_type = data.get("type", "message")

src/praisonai-agents/praisonaiagents/session.py

@@ -1,655 +0,0 @@
-"""
-Session Management for PraisonAI Agents
-
-A simple wrapper around existing stateful capabilities to provide a unified
-session API for developers building stateful agent applications.
-"""
-from __future__ import annotations
-
-import os
-import uuid
-import requests
-import json
-import time
-import threading
-from typing import Any, Dict, List, Optional, TYPE_CHECKING
-
-if TYPE_CHECKING:
-    from .memory.memory import Memory
-    from .knowledge.knowledge import Knowledge
-
-from .agent import Agent
-
-
-class Session:
-    """
-    A simple wrapper around PraisonAI's existing stateful capabilities.
-    
-    Provides a unified API for:
-    - Session management with persistent state
-    - Memory operations (short-term, long-term, user-specific)
-    - Knowledge base operations
-    - Agent state management
-    - Remote agent connectivity
-    
-    Examples:
-        # Local session with agent
-        session = Session(session_id="chat_123", user_id="user_456")
-        agent = session.Agent(name="Assistant", role="Helpful AI")
-        
-        # Remote agent session (similar to Google ADK)
-        session = Session(agent_url="192.168.1.10:8000/agent")
-        response = session.chat("Hello from remote client!")
-        
-        # Save session state
-        session.save_state({"conversation_topic": "AI research"})
-    """
-
-    def __init__(
-        self, 
-        session_id: Optional[str] = None,
-        user_id: Optional[str] = None,
-        agent_url: Optional[str] = None,
-        memory_config: Optional[Dict[str, Any]] = None,
-        knowledge_config: Optional[Dict[str, Any]] = None,
-        timeout: int = 30,
-        session_ttl: Optional[int] = None  # Gap 2b: TTL in seconds
-    ):
-        """
-        Initialize a new session with optional persistence or remote agent connectivity.
-        
-        Args:
-            session_id: Unique session identifier. Auto-generated if None.
-            user_id: User identifier for user-specific memory operations.
-            agent_url: URL of remote agent for direct connectivity (e.g., "192.168.1.10:8000/agent")
-            memory_config: Configuration for memory system (defaults to RAG)
-            knowledge_config: Configuration for knowledge base system  
-            timeout: HTTP timeout for remote agent calls (default: 30 seconds)
-            session_ttl: Time-to-live in seconds after which session expires (Gap 2b)
-        """
-        self.session_id = session_id or str(uuid.uuid4())[:8]
-        self.user_id = user_id or "default_user"
-        self.agent_url = agent_url
-        self.timeout = timeout
-        self.is_remote = agent_url is not None
-        self._state_lock = threading.RLock()  # Reentrant lock for thread-safe state operations
-
-        # Validate agent_url format
-        if self.is_remote:
-            if not self.agent_url.startswith(('http://', 'https://')):
-                # Assume http if no protocol specified
-                self.agent_url = f"http://{self.agent_url}"
-            # Test connectivity to remote agent
-            self._test_remote_connection()
-
-        # Initialize memory with sensible defaults (only for local sessions)
-        if not self.is_remote:
-            default_memory_config = {
-                "provider": "rag",
-                "use_embedding": False,  # Disable embeddings to avoid OpenAI API key requirement
-                "rag_db_path": str(self._get_session_dir() / "chroma_db")
-            }
-            if memory_config:
-                default_memory_config.update(memory_config)
-            self.memory_config = default_memory_config
-
-            # Initialize knowledge with session-specific config
-            default_knowledge_config = knowledge_config or {}
-            self.knowledge_config = default_knowledge_config
-
-            # Create session directory
-            self._get_session_dir().mkdir(parents=True, exist_ok=True)
-
-            # Initialize components lazily
-            self._memory = None
-            self._knowledge = None
-            self._agents_instance = None
-            self._agents = {}  # Track agents and their chat histories
-        else:
-            # For remote sessions, disable local memory/knowledge
-            self.memory_config = {}
-            self.knowledge_config = {}
-            self._memory = None
-            self._knowledge = None
-            self._agents_instance = None
-            self._agents = {}  # Track agents and their chat histories
-
-        # Gap 2b: Session TTL and cleanup support  
-        self.session_ttl = session_ttl
-        self._created_at = time.time()  # Track creation time for TTL
-
-    def _get_session_dir(self):
-        """Return session-specific directory using paths.py."""
-        from pathlib import Path
-        from .paths import get_project_sessions_dir
-        return get_project_sessions_dir() / self.session_id
-
-    @property
-    def memory(self) -> Memory:
-        """Lazy-loaded memory instance"""
-        if self.is_remote:
-            raise ValueError("Memory operations are not available for remote agent sessions")
-        if self._memory is None:
-            from .memory.memory import Memory
-            self._memory = Memory(config=self.memory_config)
-        return self._memory
-
-    @property
-    def knowledge(self) -> Knowledge:
-        """Lazy-loaded knowledge instance"""
-        if self.is_remote:
-            raise ValueError("Knowledge operations are not available for remote agent sessions")
-        if self._knowledge is None:
-            from .knowledge.knowledge import Knowledge
-            self._knowledge = Knowledge(config=self.knowledge_config)
-        return self._knowledge
-
-    def Agent(
-        self,
-        name: str,
-        role: str = "Assistant", 
-        instructions: Optional[str] = None,
-        tools: Optional[List[Any]] = None,
-        memory: bool = True,
-        knowledge: Optional[List[str]] = None,
-        **kwargs
-    ) -> Agent:
-        """
-        Create an agent with session context.
-        
-        Args:
-            name: Agent name
-            role: Agent role
-            instructions: Agent instructions
-            tools: List of tools for the agent
-            memory: Enable memory for the agent
-            knowledge: Knowledge sources for the agent
-            **kwargs: Additional agent parameters
-        
-        Returns:
-            Configured Agent instance
-            
-        Raises:
-            ValueError: If this is a remote session (use chat() instead)
-        """
-        if self.is_remote:
-            raise ValueError("Cannot create local agents in remote sessions. Use chat() to communicate with the remote agent.")
-
-        agent_kwargs = {
-            "name": name,
-            "role": role,
-            "user_id": self.user_id,
-            **kwargs
-        }
-
-        if instructions:
-            agent_kwargs["instructions"] = instructions
-        if tools:
-            agent_kwargs["tools"] = tools
-        if memory:
-            agent_kwargs["memory"] = self.memory
-        if knowledge:
-            agent_kwargs["knowledge"] = knowledge
-            agent_kwargs["knowledge_config"] = self.knowledge_config
-
-        agent = Agent(**agent_kwargs)
-        
-        # Create a unique key for this agent (Gap 2a fix: include session_id for proper isolation)
-        agent_key = f"{self.session_id}:{name}:{role}"
-        
-        # Restore chat history if it exists from previous sessions
-        if agent_key in self._agents:
-            agent.chat_history = self._agents[agent_key].get("chat_history", [])
-        else:
-            # Try to restore from memory for backward compatibility
-            restored_history = self._restore_agent_chat_history(agent_key)
-            agent.chat_history = restored_history
-        
-        # Track the agent
-        self._agents[agent_key] = {"agent": agent, "chat_history": agent.chat_history}
-        
-        return agent
-
-    # Keep create_agent for backward compatibility
-    def create_agent(self, *args, **kwargs) -> Agent:
-        """Backward compatibility wrapper for Agent method"""
-        return self.Agent(*args, **kwargs)
-
-    def save_state(self, state_data: Dict[str, Any]) -> None:
-        """
-        Save session state data to memory.
-        
-        Args:
-            state_data: Dictionary of state data to save
-            
-        Raises:
-            ValueError: If this is a remote session
-        """
-        if self.is_remote:
-            raise ValueError("State operations are not available for remote agent sessions")
-            
-        # Save agent chat histories first
-        self._save_agent_chat_histories()
-        
-        # Save session state
-        state_text = f"Session state: {state_data}"
-        self.memory.store_short_term(
-            text=state_text,
-            metadata={
-                "type": "session_state",
-                "session_id": self.session_id,
-                "user_id": self.user_id,
-                **state_data
-            }
-        )
-
-    def restore_state(self) -> Dict[str, Any]:
-        """
-        Restore session state from memory.
-        
-        Returns:
-            Dictionary of restored state data
-            
-        Raises:
-            ValueError: If this is a remote session
-        """
-        if self.is_remote:
-            raise ValueError("State operations are not available for remote agent sessions")
-        # Use content-based search for better SQLite compatibility
-        results = self.memory.search_short_term(
-            query="Session state:",
-            limit=10  # Get more results to filter by session_id
-        )
-
-        # Restore agent chat histories first
-        self._restore_agent_chat_histories()
-        
-        # Filter results by session_id in metadata
-        for result in results:
-            metadata = result.get("metadata", {})
-            if (metadata.get("type") == "session_state" and 
-                metadata.get("session_id") == self.session_id):
-                # Extract state data from metadata (excluding system fields)
-                state_data = {k: v for k, v in metadata.items() 
-                             if k not in ["type", "session_id", "user_id"]}
-                return state_data
-
-        return {}
-
-    def _restore_agent_chat_history(self, agent_key: str) -> List[Dict[str, Any]]:
-        """
-        Restore agent chat history from SessionStore first, then memory fallback (Gap 2c fix).
-        
-        Args:
-            agent_key: Unique identifier for the agent
-            
-        Returns:
-            List of chat history messages or empty list if not found
-        """
-        if self.is_remote:
-            return []
-        
-        # Gap 2c: Try SessionStore first for clean separation
-        try:
-            from .session.store import get_default_session_store
-            session_store = get_default_session_store()
-            chat_history = session_store.get_chat_history(agent_key)
-            if not chat_history:
-                # Backward compatibility: fall back to legacy
-                # "{session_id}_{agent_key}" format for existing stored conversations.
-                chat_history = session_store.get_chat_history(f"{self.session_id}_{agent_key}")
-            if chat_history:
-                return chat_history
-        except ImportError:
-            pass
-        
-        # Fallback: Search for agent chat history in memory (backward compatibility)
-        results = self.memory.search_short_term(
-            query="Agent chat history for",
-            limit=10
-        )
-        
-        # Filter results by session_id and agent_key
-        for result in results:
-            metadata = result.get("metadata", {})
-            if (metadata.get("type") == "agent_chat_history" and 
-                metadata.get("session_id") == self.session_id and
-                metadata.get("agent_key") == agent_key):
-                # Extract chat history from metadata
-                chat_history = metadata.get("chat_history", [])
-                return chat_history
-        
-        return []
-
-    def _restore_agent_chat_histories(self) -> None:
-        """
-        Restore all agent chat histories from memory.
-        """
-        if self.is_remote:
-            return
-        
-        # Search for all agent chat histories in memory
-        results = self.memory.search_short_term(
-            query="Agent chat history for",
-            limit=50  # Get many results to find all agents
-        )
-        
-        # Filter and restore chat histories for this session
-        for result in results:
-            metadata = result.get("metadata", {})
-            if (metadata.get("type") == "agent_chat_history" and 
-                metadata.get("session_id") == self.session_id):
-                agent_key = metadata.get("agent_key")
-                chat_history = metadata.get("chat_history", [])
-                
-                if agent_key and chat_history:
-                    # Store in _agents dict for later retrieval
-                    self._agents[agent_key] = {
-                        "agent": None,  # Will be populated when Agent is created
-                        "chat_history": chat_history
-                    }
-
-    def _save_agent_chat_histories(self) -> None:
-        """
-        Save all agent chat histories.
-        
-        G-2 FIX: Routes to SessionStore instead of Memory.store_short_term() to
-        maintain clean separation between conversation history (SessionStore)
-        and semantic memory (Memory). Falls back to Memory for backward compat.
-        """
-        if self.is_remote:
-            return
-        
-        for agent_key, agent_data in self._agents.items():
-            agent = agent_data.get("agent")
-            chat_history = None
-            
-            # Prioritize history from the live agent object, but fall back to restored history
-            if agent and hasattr(agent, 'chat_history'):
-                chat_history = agent.chat_history
-                agent_data["chat_history"] = chat_history  # Ensure tracked history is up-to-date
-            else:
-                chat_history = agent_data.get("chat_history")
-            
-            if chat_history is not None:
-                # G-2 FIX: Use SessionStore for clean separation (Gap 2c fix)
-                session_store = None
-                try:
-                    from .session.store import get_default_session_store
-                    session_store = get_default_session_store()
-                except ImportError:
-                    pass
-                
-                if session_store is not None:
-                    # Use SessionStore for conversation history
-                    for msg in chat_history:
-                        if isinstance(msg, dict):
-                            session_store.add_message(
-                                agent_key,
-                                role=msg.get("role", "user"),
-                                content=msg.get("content", ""),
-                            )
-                else:
-                    # Fallback to Memory.store_short_term() for backward compatibility
-                    history_text = f"Agent chat history for {agent_key}"
-                    self.memory.store_short_term(
-                        text=history_text,
-                        metadata={
-                            "type": "agent_chat_history",
-                            "session_id": self.session_id,
-                            "user_id": self.user_id,
-                            "agent_key": agent_key,
-                            "chat_history": chat_history
-                        }
-                    )
-
-    def get_state(self, key: str, default: Any = None) -> Any:
-        """Get a specific state value"""
-        with self._state_lock:
-            state = self.restore_state()
-            return state.get(key, default)
-
-    def set_state(self, key: str, value: Any) -> None:
-        """Set a specific state value"""
-        with self._state_lock:
-            current_state = self.restore_state()
-            current_state[key] = value
-            self.save_state(current_state)
-
-    def increment_state(self, key: str, increment: int = 1, default: int = 0) -> None:
-        """Increment a numeric state value atomically"""
-        with self._state_lock:
-            current_state = self.restore_state()
-            current_value = current_state.get(key, default)
-            current_state[key] = current_value + increment
-            self.save_state(current_state)
-
-    def add_memory(self, text: str, memory_type: str = "long", **metadata) -> None:
-        """
-        Add information to session memory.
-        
-        Args:
-            text: Text to store
-            memory_type: "short" or "long" term memory
-            **metadata: Additional metadata
-        """
-        metadata.update({
-            "session_id": self.session_id,
-            "user_id": self.user_id
-        })
-
-        if memory_type == "short":
-            self.memory.store_short_term(text, metadata=metadata)
-        else:
-            self.memory.store_long_term(text, metadata=metadata)
-
-    def search_memory(self, query: str, memory_type: str = "long", limit: int = 5) -> List[Dict[str, Any]]:
-        """
-        Search session memory.
-        
-        Args:
-            query: Search query
-            memory_type: "short" or "long" term memory
-            limit: Maximum results to return
-
-        Returns:
-            List of memory results
-        """
-        if memory_type == "short":
-            return self.memory.search_short_term(query, limit=limit)
-        return self.memory.search_long_term(query, limit=limit)
-
-    def add_knowledge(self, source: str) -> None:
-        """
-        Add knowledge source to session.
-        
-        Args:
-            source: File path, URL, or text content
-        """
-        self.knowledge.add(source, user_id=self.user_id, agent_id=self.session_id)
-
-    def search_knowledge(self, query: str, limit: int = 5) -> List[Dict[str, Any]]:
-        """
-        Search session knowledge base.
-        
-        Args:
-            query: Search query
-            limit: Maximum results to return
-
-        Returns:
-            List of knowledge results
-        """
-        return self.knowledge.search(query, agent_id=self.session_id, limit=limit)
-
-    def clear_memory(self, memory_type: str = "all") -> None:
-        """
-        Clear session memory.
-        
-        Args:
-            memory_type: "short", "long", or "all"
-        """
-        if memory_type in ["short", "all"]:
-            self.memory.reset_short_term()
-        if memory_type in ["long", "all"]:
-            self.memory.reset_long_term()
-
-    def get_context(self, query: str, max_items: int = 3) -> str:
-        """
-        Build context from session memory and knowledge.
-        
-        Args:
-            query: Query to build context for
-            max_items: Maximum items per section
-
-        Returns:
-            Formatted context string
-        """
-        return self.memory.build_context_for_task(
-            task_descr=query,
-            user_id=self.user_id,
-            max_items=max_items
-        )
-
-    def _test_remote_connection(self) -> None:
-        """
-        Test connectivity to the remote agent.
-        
-        Raises:
-            ConnectionError: If unable to connect to the remote agent
-        """
-        try:
-            # Try a simple GET request to check if the server is responding
-            test_url = self.agent_url.rstrip('/') + '/health' if '/health' not in self.agent_url else self.agent_url
-            response = requests.get(test_url, timeout=self.timeout)
-            if response.status_code != 200:
-                # If health endpoint fails, try the main endpoint
-                response = requests.head(self.agent_url, timeout=self.timeout)
-                if response.status_code not in [200, 405]:  # 405 = Method Not Allowed is OK
-                    raise ConnectionError(f"Remote agent returned status code: {response.status_code}")
-            print(f"✅ Successfully connected to remote agent at {self.agent_url}")
-        except requests.exceptions.Timeout:
-            raise ConnectionError(f"Timeout connecting to remote agent at {self.agent_url}")
-        except requests.exceptions.ConnectionError:
-            raise ConnectionError(f"Failed to connect to remote agent at {self.agent_url}")
-        except Exception as e:
-            raise ConnectionError(f"Error connecting to remote agent: {str(e)}")
-
-    def chat(self, message: str, **kwargs) -> str:
-        """
-        Send a message to the remote agent or handle local session.
-        
-        Args:
-            message: The message to send to the agent
-            **kwargs: Additional parameters for the request
-            
-        Returns:
-            The agent's response
-            
-        Raises:
-            ValueError: If this is not a remote session
-            ConnectionError: If unable to communicate with remote agent
-        """
-        if not self.is_remote:
-            raise ValueError("chat() method is only available for remote agent sessions. Use Agent.chat() for local agents.")
-        
-        try:
-            # Prepare the request payload
-            payload = {
-                "query": message,
-                "session_id": self.session_id,
-                "user_id": self.user_id,
-                **kwargs
-            }
-            
-            # Send POST request to the remote agent
-            response = requests.post(
-                self.agent_url,
-                json=payload,
-                headers={"Content-Type": "application/json"},
-                timeout=self.timeout
-            )
-            
-            # Check if request was successful
-            response.raise_for_status()
-            
-            # Parse the response
-            result = response.json()
-            
-            # Extract the agent's response
-            if isinstance(result, dict):
-                return result.get("response", str(result))
-            else:
-                return str(result)
-                
-        except requests.exceptions.Timeout:
-            raise ConnectionError(f"Timeout communicating with remote agent at {self.agent_url}")
-        except requests.exceptions.ConnectionError:
-            raise ConnectionError(f"Failed to communicate with remote agent at {self.agent_url}")
-        except requests.exceptions.HTTPError as e:
-            raise ConnectionError(f"HTTP error from remote agent: {e}")
-        except json.JSONDecodeError:
-            # If response is not JSON, return the raw text
-            return response.text
-        except Exception as e:
-            raise ConnectionError(f"Error communicating with remote agent: {str(e)}")
-
-    def send_message(self, message: str, **kwargs) -> str:
-        """
-        Alias for chat() method to match Google ADK pattern.
-        
-        Args:
-            message: The message to send to the agent
-            **kwargs: Additional parameters for the request
-            
-        Returns:
-            The agent's response
-        """
-        return self.chat(message, **kwargs)
-
-    def is_expired(self) -> bool:
-        """Check if the session has expired based on TTL (Gap 2b fix)."""
-        if self.session_ttl is None:
-            return False
-        return time.time() - self._created_at > self.session_ttl
-
-    def close(self) -> None:
-        """Close and cleanup the session (Gap 2b fix)."""
-        if self.is_remote:
-            return  # No cleanup needed for remote sessions
-        
-        # Properly cleanup memory
-        if self._memory:
-            try:
-                # Call close_connections to properly cleanup memory adapters
-                if hasattr(self._memory, 'close_connections'):
-                    self._memory.close_connections()
-            except Exception as e:
-                import logging
-                logging.warning(f"Memory cleanup failed: {e}")
-            finally:
-                self._memory = None
-        
-        # Clear knowledge
-        if self._knowledge:
-            try:
-                self._knowledge = None
-            except Exception:
-                pass  # Ignore cleanup errors
-        
-        # Clear agents
-        self._agents.clear()
-
-    def time_to_expiry(self) -> Optional[float]:
-        """Get seconds until session expires, or None if no TTL set (Gap 2b)."""
-        if self.session_ttl is None:
-            return None
-        elapsed = time.time() - self._created_at
-        return max(0, self.session_ttl - elapsed)
-
-    def __str__(self) -> str:
-        if self.is_remote:
-            return f"Session(id='{self.session_id}', user='{self.user_id}', remote_agent='{self.agent_url}')"
-        return f"Session(id='{self.session_id}', user='{self.user_id}')"
-
-    def __repr__(self) -> str:
-        return self.__str__()

src/praisonai-agents/praisonaiagents/session/api.py

@@ -11,9 +11,12 @@ from __future__ import annotations
 import os
 import uuid
 import json
+import time
 import logging
 from typing import Any, Dict, List, Optional, TYPE_CHECKING
 
+logger = logging.getLogger(__name__)
+
 if TYPE_CHECKING:
     from ..memory.memory import Memory
     from ..knowledge.knowledge import Knowledge
@@ -57,7 +60,8 @@ class Session:
         agent_url: Optional[str] = None,
         memory_config: Optional[Dict[str, Any]] = None,
         knowledge_config: Optional[Dict[str, Any]] = None,
-        timeout: int = 30
+        timeout: int = 30,
+        session_ttl: Optional[int] = None
     ):
         """
         Initialize a new session with optional persistence or remote agent connectivity.
@@ -69,12 +73,22 @@ class Session:
             memory_config: Configuration for memory system (defaults to RAG)
             knowledge_config: Configuration for knowledge base system  
             timeout: HTTP timeout for remote agent calls (default: 30 seconds)
+            session_ttl: Time-to-live in seconds after which session expires
         """
         self.session_id = session_id or str(uuid.uuid4())[:8]
         self.user_id = user_id or "default_user"
         self.agent_url = agent_url
         self.timeout = timeout
         self.is_remote = agent_url is not None
+        
+        # TTL (time-to-live) functionality
+        if session_ttl is not None and session_ttl < 0:
+            raise ValueError(
+                f"Invalid session_ttl={session_ttl} for session_id={self.session_id}. "
+                "Use None (no expiry) or a non-negative number of seconds."
+            )
+        self.session_ttl = session_ttl
+        self._created_at = time.monotonic()
 
         # Validate agent_url format
         if self.is_remote:
@@ -477,6 +491,20 @@ class Session:
         Returns:
             Formatted context string
         """
+        # Use cache-optimized context if available for better prompt caching
+        if hasattr(self.memory, 'build_cache_optimized_context'):
+            try:
+                cache_result = self.memory.build_cache_optimized_context(
+                    task_descr=query,
+                    user_id=self.user_id,
+                    max_items=max_items,
+                    include_cache_boundary=False  # Don't include boundary for session context
+                )
+                return cache_result.get('stable_prefix', '')
+            except Exception as e:
+                # Fall back to standard context building
+                logger.debug(f"Cache-optimized context failed for session '{self.session_id}', falling back to standard: {e}")
+        
         return self.memory.build_context_for_task(
             task_descr=query,
             user_id=self.user_id,
@@ -573,6 +601,46 @@ class Session:
         """
         return self.chat(message, **kwargs)
 
+    def is_expired(self) -> bool:
+        """Check if the session has expired based on TTL."""
+        if self.session_ttl is None:
+            return False
+        return time.monotonic() - self._created_at >= self.session_ttl
+
+    def close(self) -> None:
+        """Close and cleanup the session."""
+        if self.is_remote:
+            return  # No cleanup needed for remote sessions
+        
+        # Save agent chat histories before clearing agents
+        self._save_agent_chat_histories()
+        
+        # Properly cleanup memory
+        if hasattr(self, '_memory') and self._memory:
+            try:
+                # Call close_connections to properly cleanup memory adapters
+                if hasattr(self._memory, 'close_connections'):
+                    self._memory.close_connections()
+            except Exception as e:
+                logger.warning(f"Memory cleanup failed: {e}")
+            finally:
+                self._memory = None
+        
+        # Clear knowledge
+        if hasattr(self, '_knowledge') and self._knowledge:
+            self._knowledge = None
+        
+        # Clear agents
+        if hasattr(self, '_agents'):
+            self._agents.clear()
+
+    def time_to_expiry(self) -> Optional[float]:
+        """Get seconds until session expires, or None if no TTL set."""
+        if self.session_ttl is None:
+            return None
+        elapsed = time.monotonic() - self._created_at
+        return max(0, self.session_ttl - elapsed)
+
     def __str__(self) -> str:
         if self.is_remote:
             return f"Session(id='{self.session_id}', user='{self.user_id}', remote_agent='{self.agent_url}')"

src/praisonai-agents/praisonaiagents/task/task.py

@@ -740,10 +740,27 @@ class Task:
                 # Build context for next tasks
                 if self.next_tasks:
                     logger.info(f"Task {self.id}: Building context for next tasks...")
-                    context = self.memory.build_context_for_task(
-                        task_descr=task_output.raw,
-                        max_items=5
-                    )
+                    # Use cache-optimized context if available for better prompt caching
+                    if hasattr(self.memory, 'build_cache_optimized_context'):
+                        try:
+                            cache_result = self.memory.build_cache_optimized_context(
+                                task_descr=task_output.raw,
+                                max_items=5,
+                                include_cache_boundary=False  # Don't include boundary for task context
+                            )
+                            context = cache_result.get('stable_prefix', '')
+                        except Exception as e:
+                            # Fall back to standard context building
+                            logger.debug(f"Cache-optimized context failed for task '{self.id}', falling back to standard: {e}")
+                            context = self.memory.build_context_for_task(
+                                task_descr=task_output.raw,
+                                max_items=5
+                            )
+                    else:
+                        context = self.memory.build_context_for_task(
+                            task_descr=task_output.raw,
+                            max_items=5
+                        )
                     logger.info(f"Task {self.id}: Built context for next tasks: {len(context)} items")
 
                 logger.info(f"Task {self.id}: Memory operations complete")

src/praisonai-agents/praisonaiagents/tools/__init__.py

@@ -1,11 +1,8 @@
 """Tools package for PraisonAI Agents - uses lazy loading for performance"""
 from importlib import import_module
 from typing import Any
-import threading
 
-# Thread-safe lazy loading cache
-_tools_lock = threading.Lock()
-_tools_lazy_cache = {}
+# Note: actual lazy loading cache is implemented with _loaded_classes in __getattr__
 
 # Export core tool items for organized imports (lightweight)
 from .base import BaseTool, ToolResult, ToolValidationError, validate_tool

src/praisonai-agents/praisonaiagents/tools/ast_grep_tool.py

@@ -31,6 +31,8 @@ import logging
 from praisonaiagents._logging import get_logger
 from typing import Optional, List
 
+from ..approval import require_approval
+
 logger = get_logger(__name__)
 
 # Availability cache for performance (checked once per process)
@@ -146,6 +148,7 @@ def ast_grep_search(
         logger.exception("Unexpected error in ast_grep_search")
         return f"Error: {e}"
 
+@require_approval(risk_level="high")
 def ast_grep_rewrite(
     pattern: str,
     replacement: str,

src/praisonai-agents/praisonaiagents/tools/base.py

@@ -17,9 +17,12 @@ Usage:
 from abc import ABC, abstractmethod
 from typing import Any, Callable, Dict, List, Optional, Type, get_type_hints
 import inspect
+import json
 import logging
 import copy
 
+from .schema import annotation_to_json_schema, get_parameter_requirements
+
 
 class ToolValidationError(Exception):
     """Raised when a tool fails validation."""
@@ -129,18 +132,17 @@ class BaseTool(ABC):
                 
                 # Get type hint
                 param_type = hints.get(param_name, Any)
-                json_type = self._python_type_to_json(param_type)
                 
-                # Build property schema
-                prop_schema = {"type": json_type}
+                # Use new schema utility for proper type handling
+                prop_schema = annotation_to_json_schema(param_type)
                 
                 # Add description from docstring if available
                 # (Could parse docstring for param descriptions)
                 
                 schema["properties"][param_name] = prop_schema
                 
-                # Check if required (no default value)
-                if param.default is inspect.Parameter.empty:
+                # Check if required using improved logic
+                if get_parameter_requirements(sig, param_name):
                     schema["required"].append(param_name)
         except Exception as e:
             logging.debug(f"Could not generate schema for {self.name}: {e}")
@@ -149,28 +151,15 @@ class BaseTool(ABC):
     
     @staticmethod
     def _python_type_to_json(python_type: Type) -> str:
-        """Convert Python type to JSON Schema type."""
-        type_map = {
-            str: "string",
-            int: "integer",
-            float: "number",
-            bool: "boolean",
-            list: "array",
-            dict: "object",
-            type(None): "null"
-        }
+        """Convert Python type to JSON Schema type.
         
-        # Handle Optional, Union, etc.
-        origin = getattr(python_type, '__origin__', None)
-        if origin is not None:
-            # For List[X], return "array"
-            if origin is list:
-                return "array"
-            # For Dict[X, Y], return "object"
-            if origin is dict:
-                return "object"
-        
-        return type_map.get(python_type, "string")
+        DEPRECATED: Use annotation_to_json_schema() from schema.py instead.
+        This method is kept for backward compatibility but will be removed.
+        """
+        # Legacy fallback - delegate to new schema utility and extract type
+        from .schema import annotation_to_json_schema
+        schema = annotation_to_json_schema(python_type)
+        return schema.get("type", "string")
     
     @abstractmethod
     def run(self, **kwargs) -> Any:
@@ -442,5 +431,49 @@ def validate_tool_schema_consistency(tools: List[Any]) -> bool:
     return True
 
 
+def get_sorted_tool_schemas(tools: List[Any]) -> List[Dict[str, Any]]:
+    """Get tool schemas sorted by function name for deterministic ordering.
+    
+    This ensures tool schemas are always ordered consistently for prompt caching optimization.
+    
+    Args:
+        tools: List of tool objects (BaseTool instances, callables, etc.)
+        
+    Returns:
+        List of tool schemas sorted alphabetically by function name
+        
+    Raises:
+        ToolValidationError: If validation fails
+    """
+    if not tools:
+        return []
+        
+    # First validate all tools (reuse existing validation logic)
+    validate_tool_schema_consistency(tools)
+    
+    from .decorator import get_tool_schema
+    schemas = []
+    
+    for tool in tools:
+        # Get schema from different tool types
+        if isinstance(tool, BaseTool):
+            schema = tool.get_schema()
+        elif hasattr(tool, 'get_schema') and callable(getattr(tool, 'get_schema')):
+            schema = tool.get_schema()
+        elif callable(tool):
+            schema = get_tool_schema(tool)
+        else:
+            continue  # Skip invalid tools (validation already happened)
+            
+        if schema:
+            schemas.append(schema)
+    
+    # Sort schemas by function name for deterministic ordering
+    def sort_key(schema):
+        return schema.get("function", {}).get("name", "")
+    
+    return sorted(schemas, key=sort_key)
+
+
 # For backward compatibility - tools can also just be functions
 # The @tool decorator (in decorator.py) wraps functions into BaseTool instances

src/praisonai-agents/praisonaiagents/tools/decorator.py

@@ -31,6 +31,7 @@ import copy
 from typing import Any, Callable, Dict, Optional, Union, get_type_hints
 
 from .base import BaseTool
+from .schema import annotation_to_json_schema, get_parameter_requirements
 
 # Lazy load injected module functions to reduce import time
 _injected_module = None
@@ -52,9 +53,6 @@ def get_injected_params(func):
 def inject_state_into_kwargs(kwargs, injected_params):
     return _get_injected_module().inject_state_into_kwargs(kwargs, injected_params)
 
-def filter_injected_from_schema(schema, func):
-    return _get_injected_module().filter_injected_from_schema(schema, func)
-
 
 class FunctionTool(BaseTool):
     """A BaseTool wrapper for plain functions.
@@ -132,12 +130,13 @@ class FunctionTool(BaseTool):
                 if is_injected_type(param_type):
                     continue
                 
-                json_type = BaseTool._python_type_to_json(param_type)
+                # Use new schema utility for proper type handling
+                prop_schema = annotation_to_json_schema(param_type)
                 
-                schema["properties"][param_name] = {"type": json_type}
+                schema["properties"][param_name] = prop_schema
                 
-                # Check if required (no default value)
-                if param.default is inspect.Parameter.empty:
+                # Check if required using improved logic  
+                if get_parameter_requirements(sig, param_name):
                     schema["required"].append(param_name)
         except Exception as e:
             logging.debug(f"Could not generate schema for {func.__name__}: {e}")
@@ -342,11 +341,14 @@ def _schema_from_function(func: Callable) -> Dict[str, Any]:
                 continue
             
             param_type = hints.get(param_name, Any)
-            json_type = BaseTool._python_type_to_json(param_type)
             
-            properties[param_name] = {"type": json_type}
+            # Use new schema utility for proper type handling
+            prop_schema = annotation_to_json_schema(param_type)
             
-            if param.default is inspect.Parameter.empty:
+            properties[param_name] = prop_schema
+            
+            # Check if required using improved logic
+            if get_parameter_requirements(sig, param_name):
                 required.append(param_name)
     except Exception as e:
         logging.debug(f"Could not generate schema for {name}: {e}")

src/praisonai-agents/praisonaiagents/tools/email_tools.py

@@ -532,6 +532,14 @@ def _smtp_reply_email(message_id: str, body: str) -> str:
         logger.error(f"Failed to reply to {message_id}: {e}")
         return f"Failed to reply: {e}"
 
+def _imap_sanitize(value: str) -> str:
+    """Strip characters that break IMAP quoted-string search criteria."""
+    cleaned = value.replace('"', "").replace("\\", "")
+    if any(c in cleaned for c in "\r\n\x00"):
+        raise ValueError("Invalid IMAP search value")
+    return cleaned
+
+
 def _smtp_search_emails(
     query: Optional[str] = None,
     from_addr: Optional[str] = None,
@@ -544,11 +552,11 @@ def _smtp_search_emails(
         # Build IMAP search criteria
         criteria = []
         if from_addr:
-            criteria.append(f'FROM "{from_addr}"')
+            criteria.append(f'FROM "{_imap_sanitize(from_addr)}"')
         if subject:
-            criteria.append(f'SUBJECT "{subject}"')
+            criteria.append(f'SUBJECT "{_imap_sanitize(subject)}"')
         if query:
-            criteria.append(f'TEXT "{query}"')
+            criteria.append(f'TEXT "{_imap_sanitize(query)}"')
         if not criteria:
             criteria.append("ALL")
         search_str = " ".join(criteria)