langchain
https://github.com/langchain-ai/langchain
Python
⚡ Building applications with LLMs through composability ⚡
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- Issues
- anthropic: Streaming with adaptive thinking + display: "omitted" produces un-replayable history (400 thinking.thinking: Field required)
- feat(openrouter): implement missing Rerank component for existing partner package
- Bugs: _TracerCore copy, tool list mutation, log stream error handling, Anthropic merge corruption
- feat(langchain): expose toggle to trace inputs on `AgentMiddleware`
- fix(anthropic): stop leaked VCR httpx patch from failing live tests
- Feature: Add Responses API support to ChatOpenRouter (use_responses_api=True)
- Bug: test_stream_error_callback fails due to a bug in the testing code
- `ModelRetryMiddleware` converts non-retryable exceptions into an error `AIMessage` — `ToolRetryMiddleware` propagates them since #38845
- RunnableWithFallbacks.stream()/astream() misinterpret a legitimately empty upstream stream as a failure
- fix(openai): route reasoning tool calls to Responses API
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