langchain
https://github.com/langchain-ai/langchain
Python
⚡ Building applications with LLMs through composability ⚡
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- Issues
- openrouter json_schema is not enforced, llm doesn't know about the schema
- RunnableWithFallbacks.invoke() drops parent_run_id for child callback events (regression from #25550)
- [Bug]: ChatOllama crashes on Optional fields due to anyOf: [T, null] schema pattern
- langchain_anthropic does not support set verify=False and cert filepath
- Non-dict tool arguments should be set invalid
- ModelRequest.override(messages=...) rejects list[BaseMessage] due to list invariance
- Bug: `merge_dicts` raises TypeError for float values during streaming chunk aggregation
- fix(core): shared mutable dict references in BaseLLM metadata_list construction
- Support Anthropic Claude automatic caching in ChatOpenRouter
- XAI: Make Responses endpoint default
- Docs
- Python not yet supported