* feat: migrate to createAgent API and middleware architecture
BREAKING CHANGE: Major refactor from custom LangGraph implementation to new langchain createAgent API
**Architecture Migration:**
- Replace createReactAgent with createAgent API from langchain package
- Migrate from custom state management to middleware-based architecture
- Remove custom DeepAgentState and model configuration in favor of built-in patterns
**Package Updates:**
- Upgrade to @langchain/anthropic@alpha, @langchain/langgraph@next
- Add langchain package as main dependency with createAgent support
- Update @langchain/core to local development version
**Code Reorganization:**
- Move tools from src/tools.ts to modular middleware pattern (src/middleware/)
- Simplify type definitions in src/types.ts with Zod schema validation
- Refactor src/subAgent.ts to use createAgent with middleware integration
- Update src/graph.ts and src/index.ts for new API patterns
**Removed Files:**
- src/state.ts: Custom state management no longer needed
- src/model.ts: Default model configuration handled by createAgent
- src/interrupt.ts: Interrupt handling integrated into middleware
**New Middleware System:**
- src/middleware/fs.ts: File system operations middleware
- src/middleware/todo.ts: Todo management middleware
- src/middleware/index.ts: Middleware exports and configuration
**Configuration:**
- Fix tsconfig.json extends path for @tsconfig/recommended
- Update examples/research/research-agent.ts for new API
- Upgrade TypeScript ESLint and other dev dependencies
This migration provides a more maintainable architecture with better separation of concerns
and aligns with the latest LangChain patterns for agent development.
* consolidate imports
* progress
* push remaining update
* fix ci
* cr
* fix
* add anthropicPromptCachingMiddleware
* prettier
* prettier
* allow sub agents to have middleware
* prettier
* Merge pull request #37 from wuchangming/cb/createAgent-migration
feat: Add a name property value to ToolMessage
* fix types
* First stab at porting deepagents
* Cleanup
* wip: middleware review
* Fix to work on LSD
* Use Zod 4
* Revert "Use Zod 4"
This reverts commit 2292cd27ae.
* fix: use store from runnable config
* Exclude `jumpTo` from subgraph state
* Auto-infer filesystem middleware
* Include `strict` in tests
* Further cleanup of test files
* Remove any, remove only
* Fix invalid types for filesystem
* Fix invalid condition
* Fix file system tests, make those concurrent
* Replace _getType with type
* Remove Annotation
* Cleanup rest of test files
* Bump to 1.0.0
* Use PNPM
* Fix scripts
* Build using tsdown
* Bump to 1.0.0-beta.1
* Update CI
* Update again
* Fix formatting
* Add stub prettierrc for VSCode
* Add pluggable filesystem
* linting
* Full test coverage
* Add coerce option
* Bump to 1.0.0-beta.2
* Bump to 1.0.0-beta.3
* Add windows to matrix
* Address comments
* Add examples
* tweak prompt
* Linting
* Remove checkpointer=False
* Add missing env files
* Update README
* add missing dev deps
* add lockfile
* Fix broken test
* Normalize paths for linux
* Fix tests to be OS agnostic
* Normalize for glob search
---------
Co-authored-by: Christian Bromann <git@bromann.dev>
Co-authored-by: Wu Changming <wuchangmingnice@163.com>
Co-authored-by: Nick Huang <nick@langchain.dev>
Co-authored-by: Hunter Lovell <hunter@hntrl.io>
Hunter Lovell