langchain
https://github.com/langchain-ai/langchain
Python
⚡ Building applications with LLMs through composability ⚡
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- Issues
- test(deps): Include Python 3.14 in integration test matrix
- Missing elicitation events & IDs in MCP astream make async UI-based elicitation impossible
- `@chain` decorator argument type is not fully compatible with `RunnableLambda`
- OpenAIAssistantRunnable `ainvoke` calls `_get_response` instead of `_aget_response`
- `convert_to_openai_messages` does not handle the `ChatOpenAI` `response/v1` format
- Richer Interface for Multimodal Data and BaseChat Interaction
- `trim_messages` returning invalid messages history
- Allow passing only a subset of the state in the ToolRuntime
- Unified Structured Output and Tool-Calling Interface in BaseChatModel
- Add PythonREPLTool (formerly in langchain_experimental) support for LangChain v1
- Docs
- Python not yet supported