●Change8

Migrating to LangGraph prebuilt==1.1.0a1

Version prebuilt==1.1.0a1 introduces 1 breaking change. This guide details how to update your code.

Released: 5/1/2026

1
Breaking Changes
1
Migration Steps
5
Affected Symbols

⚠️ Check Your Code

If you use any of these symbols, you need to read this guide:

langgraphprebuiltEventLogStreamChannelToolRuntime

Breaking Changes

●Issue #1

The functionality previously provided by `EventLog` in `langgraph` and `prebuilt` has been merged into `StreamChannel`. Users should now use `StreamChannel` and provide an optional name if specific stream identification is required.

Migration Steps

  1. 1
    Replace usage of `EventLog` with `StreamChannel` in `langgraph` and `prebuilt` code, optionally providing a name argument to `StreamChannel` if needed.

Release Summary

This release bumps several packages to alpha versions, merges EventLog functionality into StreamChannel, and introduces streaming infrastructure to langgraph.

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