langchain
https://github.com/langchain-ai/langchain
Python
⚡ Building applications with LLMs through composability ⚡
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- Issues
- create_agent with ProviderStrategy binds empty tools list and breaks OpenAI-compatible providers
- HumanInTheLoopMiddleware executes rejected tool calls in LangGraph's ToolNode
- Missing await in async similarity_search example
- Validation order in NLTKTextSplitter raises misleading error when NLTK is missing
- fix(core): use parsed mime_type for base64 file blocks in openai translator
- EnsembleRetriever with id_key accumulates scores for within-retriever duplicate documents
- LangSmith Prompt Hub: UI Model config shows base_url (OpenRouter) but pullPromptCommit manifest omits base_url / wrong secret id for same commit
- feat(mistralai): surface citation metadata from chat responses
- feat(anthropic): expose response headers in response_metadata
- Using compaction causes Anthropic's API to fail when agent invoked with print_mode="messages" or when streaming with stream_mode="messages"
- Docs
- Python not yet supported