langchain
https://github.com/langchain-ai/langchain
Python
⚡ Building applications with LLMs through composability ⚡
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- Issues
- Add way to pass tokenizer template values to models
- openai: `use_responses_api=True` gives error with `AzureChatOpenAI`
- tool invocation fails to correctly recognize Pydantic v2 schema
- LangChain-OpenAI raises error due to null choices when using vLLM OpenAI-compatible API
- `aadd_texts() got multiple values for keyword argument 'ids'`
- Chunks after `batch_size` treated as non-existant
- MCP Tools Returns Data in ToolMessage but Not Passed in AIMessage for llama-3-3-70b-instruct Model
- feat(core): Make description in tools optional (supported by some vendors)
- Please add ability to simultaneously have tool calls and structured output in the response from ChatOpenAI/AzureChatOpenAI
- `AnthropicPromptCachingMiddleware` breaks model fallback with `cache_control` param
- Docs
- Python not yet supported