langchain
https://github.com/langchain-ai/langchain
Python
⚡ Building applications with LLMs through composability ⚡
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- Issues
- `TextSplitter` `chunk_overlap` is silently ignored unless `chunk_size` overflow occurs
- `llm.ainvoke` is traced differently than `llm.invoke` (won't be traced)
- `.with_structured_output()` causes `tool_choice` 422 error with Azure-hosted Deepseek V3
- `handle_event` raises `IndexError` when handler raises `NotImplementedError`
- Add Perplexity cost tracking
- String Evaluation with labelled criteria Scoring is wrong
- Support structured output with Pydantic models in `langchain-huggingface`
- fix(core): add missing type hints for `@chain` decorator with `RunnableConfig`
- fix(core)!: fix `BaseTool` when `args_schema` has pydantic validators that change the input keys
- fix(ollama): resolve `OutputParserException` when using Ollama
- Docs
- Python not yet supported