vercel/ai @ai-sdk/langchain@3.0.0

on GitHub

Major Changes

• ef992f8: Remove CommonJS exports from all packages. All packages are now ESM-only ("type": "module"). Consumers using require() must switch to ESM import syntax.
• 8359612: Start v7 pre-release

Patch Changes

• b567a6c: dependency updates

• 62ae6c7: fix(langchain): recognize Python AIMessageChunk plain message objects from RemoteGraph streams

  Python langchain-core serializes streaming message chunks with type: "AIMessageChunk", while TypeScript langchain-core uses type: "ai". The toUIMessageStream adapter previously only matched the TypeScript form, silently dropping text deltas and tool-call events when streaming from Python LangGraph servers via RemoteGraph.

• c1afaed: fix(langchain): prevent polluting global object.prototype

• 3711955: fix(langchain): reset streamEvents text between model invocations

• 6e23bf2: fix(langchain): register key mapping for tool calls emitted via messages mode for HITL interrupt matching

• c231e42: Surface LangChain citation annotations as spec-compliant source-url / source-document UI message parts. Previously, citations attached to text content blocks (e.g. from web search or RAG) were dropped entirely instead of being emitted as AI SDK source parts. Citation metadata (citedText, startIndex, endIndex, source) is preserved under providerMetadata.langchain.

• f6fc2fb: Add support for translating LangGraph tools stream progress into preliminary tool outputs.

• 9f0e36c: trigger release for all packages after provenance setup

• 7fc6bd6: Raise minimum supported Node.js version to 22. Supported versions: 22, 24, and 26.

• 0c4c275: trigger initial canary release

• 9bd6512: feat(provider): change file part data property to be tagged with a type and remove the image part type

• 258c093: chore: ensure consistent import handling and avoid import duplicates or cycles

• b8396f0: trigger initial beta release

• ff5eba1: feat: roll image-* tool output types into their equivalent file-* types