LangChain OSS
@LangChain_OSS
Ship great agents fast with our open source frameworks – LangChain, LangGraph, and Deep Agents. Maintained by @LangChain.
加入 January 2026
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What's new in LangChain? 🚀
🧯 Standard exceptions: chat models now raise standard exception types across providers, so you can distinguish retryable errors (timeouts, rate limits, etc.) in a consistent way. Fully backward compatible.
🧩 Agent middleware: custom token_counter in ContextEditingMiddleware, plus non-retryable exceptions now skip retries in ModelRetryMiddleware (
🔥 Fireworks document reranking: a new reranker integration (
📊 Token & usage accounting: bug fixes for xAI and DeepSeek (
⚡ Portability & perf: lazy transformers import, and tighter grep scope for Anthropic (
This is your harness! Thanks to everyone who made it better. 🙏
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