{"version":"1.0","generated_at":"2026-10-05T20:23:29.037508","id":295,"slug":"langchain-1-2-16","title":"版本更新：langchain-ai/langchain 1.2.16，提升开发者接入体验","summary":"LangChain发布1.2.16版本，包含性能优化、文档修正、依赖更新等多项改进，旨在提升开发者使用体验。","abstract":"版本更新：langchain-ai/langchain 1.2.16，提升开发者接入体验 LangChain发布1.2.16版本，包含性能优化、文档修正、依赖更新等多项改进，旨在提升开发者使用体验。 LangChain 1.2.16发布，性能与文档改进。 类型解析新增LRU缓存，减少开销。 内容块流式传输v2上线，提升实时性。 修复Fireworks中max_retries参数。 更新多项依赖，需注意兼容性。 性能(langchain): 在类型解析时添加lru缓存 性能(langchain): 添加另一个带中间件的初始化测试 性能(langchain): 停止在工具分发Send中将代理状态内联 特性(core): 添加以内容块为中心的流式传输(v2) 特性(langchain): 在create_agent调用上添加ls_agent_type标签 修复(fireworks): 尊重max_retries 文档(langchain): 修正代理中间件文档字符串中的导入路径 文档(langchain): 修正ModelCallLimitMiddleware文档字符串中的导入路径 文档(langchain): 在init_chat_model中添加缺失的baseten和litellm 发布(core): 1.2.26 发布(core): 1.3.0 发布(openai): 1.2.0 发布(openai): 1.2.1 发布(anthropic): 1.4.2 热修复: 提升最小核心版本 杂项: 更新依赖（pytest, pillow, cryptography, 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