langchain
https://github.com/langchain-ai/langchain
Python
⚡ Building applications with LLMs through composability ⚡
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- Issues
- ChatAnthropic cannot pass credentials/auth_token/prebuilt client to the anthropic SDK
- `HumanInTheLoopMiddleware` silently drops configured `args_schema` from interrupt payload
- fix: handle reasoning model output tags in structured output parsing
- `HumanInTheLoopMiddleware`: cross-tool edit bypasses the target tool's `interrupt_on` policy
- create_agent: the first `before_model` hook can return "model" but its path map omits it -> KeyError
- text-splitters: MarkdownHeaderTextSplitter silently drops tabs and NBSP (including inside fenced code)
- Support for the new MCP spec via `langchain.mcp`
- core: `_convert_to_v1_from_anthropic` mutates message.content when lifting `index` off an unrecognized block
- HuggingFacePipeline._generate rejects valid translation tasks due to substring check
- docs(core): Fix typo in documentation for RunnableLambda
- Docs
- Python not yet supported