langchain
https://github.com/langchain-ai/langchain
Python
⚡ Building applications with LLMs through composability ⚡
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- Issues
- `ChatAnthropic`: support a callable / token-provider for `api_key` (auto-refreshing credentials, e.g. Azure Entra ID) like `ChatOpenAI` does
- Mistral streaming tool-call chunks with index 0 generate inconsistent IDs
- :Feature: Support Anthropic mid-conversation system messages (MidConversationSystemBlockParam / role:system in messages) in ChatAnthropic
- ChatGroq._combine_llm_outputs mutates per-generation token_usage in place and mishandles None values (silent clobber / TypeError)
- HuggingFaceEndpointEmbeddings missing bill_to / additional_headers parameter
- [Bug]: ChatOpenRouter leaks httpx.AsyncClient instances causing Ephemeral Port Exhaustion
- Filesystem file search rejects valid path segments containing double dots
- `ProviderToolSearchMiddleware` defers tools as flat top-level functions instead of wrapping them in a `namespace` — no token savings
- bug: Legacy Qdrant vector store returns raw distances instead of normalized relevance scores
- core: `BaseChatModel.agenerate` masks a non-`Exception` `BaseException` with `AttributeError`
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