langchain
https://github.com/langchain-ai/langchain
Python
⚡ Building applications with LLMs through composability ⚡
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- Issues
- core: `ToolMessage.status` is not preserved by `core.messages.utils.convert_to_messages`
- "No call message found for call_*" with gpt-oss-20b in LangGraph
- Add model profile augmentation for supporting code execution
- fix(core): ensure tool callbacks fire when tools run inside `Runnable`
- `TextSplitter` `chunk_overlap` is silently ignored unless `chunk_size` overflow occurs
- Add Perplexity cost tracking
- String Evaluation with labelled criteria Scoring is wrong
- Support structured output with Pydantic models in `langchain-huggingface`
- fix(core)!: fix `BaseTool` when `args_schema` has pydantic validators that change the input keys
- Document ingestion into VectorDB does not complete when running inside Celery task
- Docs
- Python not yet supported