langchain
https://github.com/langchain-ai/langchain
Python
⚡ Building applications with LLMs through composability ⚡
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- Issues
- fix(langchain): bound Python file search fallback
- Related to #31887 (custom header pattern support)
- Bug: streaming tool call fires prematurely when first SSE chunk has empty args
- `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
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- Python not yet supported