langchain
https://github.com/langchain-ai/langchain
Python
⚡ Building applications with LLMs through composability ⚡
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- Issues
- ToolRuntime isn't injected into BaseTool subclass's _run
- fix(core): inject additional kwargs into `BaseTool` `_run` and `_arun`
- When using OpenAI Responses API in streaming mode, there is no chunk from langchain that contains the entire function_call definition including arguments.
- AssertionError: Please remove duplicate middleware instances in create_deep_agent with TodoListMiddleware and custom system_prompt
- fix(perplexity): ensure metadata appears in streaming output
- fix(core): update `on_llm_new_token` type
- feat(langchain): Only Keeping the last todo message
- SummarizationMiddleware breaks Anthropic extended thinking by removing thinking blocks during active assistant turns
- [Feature Request] Add MCP Discovery tool for dynamic MCP server discovery
- fix(core): resolve tools losing optional runnable config
- Docs
- Python not yet supported