Docs by LangChain：功能、适用场景与来源

Understand the differences between LangChain, LangGraph, and Deep Agents and when to use each one 主要功能：Integrations、Vercel’s AI SDK、Streaming: Support for streaming workflows and responses.、Persistence: Thread-level and cross-thread persistence for state management.、Token management: Conversation history summarization and large tool result eviction.、You want to use predefined tools, such as filesystem operations, bash execution, and automated context engineering.。