langchain
https://github.com/langchain-ai/langchain
Python
⚡ Building applications with LLMs through composability ⚡
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- Issues
- ollama: `client_kwargs` is mutated in place, so URL credentials leak into the caller's dict and across model instances
- invalid_tool_call blocks still reach groq and mistralai during v1 conversion
- core: postponed callable annotations break Runnable schemas and tool conversion
- Test PIIMiddleware stream redaction at every chunk split
- ChatAnthropic silently drops message-level output_config and clear_at from SystemMessage
- langchain-classic: ImportError messages for moved REPL tools link to a deleted SECURITY.md and a deleted discussion
- ChatOpenAI.stream() crashes on a mocked tool-call delta with null function
- ModelCallLimitMiddleware: the limit-exceeded message can't be told apart from a model answer
- feat(typesafe): harden TypeSafeClassifier against API limits and rate limiting
- ChatOpenAI (Responses API): streamed chunks switch from resp_… to lc_run--… ids, the stream id doesn't match the final message id
- Docs
- Python not yet supported