langchain
https://github.com/langchain-ai/langchain
Python
⚡ Building applications with LLMs through composability ⚡
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- Issues
- Feature: Add Responses API support to ChatOpenRouter (use_responses_api=True)
- RunnableWithFallbacks.stream()/astream() misinterpret a legitimately empty upstream stream as a failure
- fix(openai): route reasoning tool calls to Responses API
- docs: Document multimodal input formats in ModelProfile to resolve TODOs
- AddableDict silently drops data on type-incompatible merge (langchain_core.runnables.utils)
- Add TokenBudgetMiddleware for token-usage budgets in agents
- feat(langchain): expose provider package via `get_provider_package`
- fix(groq): make _combine_llm_outputs None-safe and non-mutating
- [FEATURE] Preserve reasoning / reasoning_content field in streaming ChatOpenAI chunks
- feat(middleware): AskQuestionMiddleware for structured HITL questions
- Docs
- Python not yet supported