langchain
https://github.com/langchain-ai/langchain
Python
⚡ Building applications with LLMs through composability ⚡
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- Issues
- TypeError: unsupported operand type(s) for += on dict in _combine_llm_outputs when making multiple LLM calls
- langchain stream_events v3 final response tokens not streamed in real-time, all arrive at once
- Bug: langchain-anthropic file_tool callback never emits args["old_path"] but _handle_rename reads it -> KeyError on every rename
- HTMLSemanticPreservingSplitter reorders inline text around tags (e.g. <strong>, <a>, etc.)
- Feature request: Profile-aware prompt router with ML-backed routing and ensemble fallback
- langchain-anthropic: `cache_control` on a `tool_use` content block is silently dropped when a matching `tool_calls` item exists
- ChatMistralAI incompatible token output format for LangSmith traceability
- Add OpenRouterEmbeddings to langchain-openrouter
- Bug: SummarizationMiddleware._find_safe_cutoff_point preserves orphan ToolMessages -> provider 400 on next call
- test_mset_chmod fails on Windows due to unsupported chmod permission bits
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- Python not yet supported