langchain
https://github.com/langchain-ai/langchain
Python
⚡ Building applications with LLMs through composability ⚡
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- Issues
- feat(typesafe): select SemIf for `TsToolSelectorMiddleware`
- feat(typesafe): select SemIf for `TsChoiceToolSelectorMiddleware`
- feat(typesafe): select SemIf for `TsHybridToolSelectorMiddleware`
- message_to_events drops AIMessage.additional_kwargs during replay
- langchain-typesafe: TypeSafeClassifier declares serialization support but cannot round-trip through built-in deserialization
- `ChatAnthropic` sends unsupported tool choice and thinking configurations for Claude Opus 5.5
- `ChatOpenAI.bind_tools()` rejects GPT-6 shell / Programmatic Tool Calling and lacks Responses round-trip support
- PIIMiddleware(apply_to_output=True) blanks parameters on tool calls, leading to a GraphRecursion Error.
- feat(langchain): MCP Apps (SEP-1865) tool visibility in langchain.mcp
- feat(typesafe): add support for custom base URL, API keys and model configuration.
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