Claude Code v2.1.231 Changelog
What changed in Claude Code CLI v2.1.231, released 2026-08-13 — explained in plain English.
TLDR
- Fixed a login bug that blocked Claude Code from connecting to certain outside apps.
- Specifically, this solves an error when trying to link tools like Slack that use a specific security setup.
- If you were getting kicked out while trying to connect an external tool, this update fixes it.
- This release is a focused bugfix for people who use Claude Code to connect to outside apps like Slack. If you use these connections, a recent bug was likely blocking you from logging in, and this update gets that connection working smoothly again.
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Fixes
- MCP OAuth sign-in error: MCP (Model Context Protocol) is a way for Claude Code to talk to outside apps. OAuth is the secure "sign in with..." system many apps use. Previously, when you tried to connect an app like Slack that uses a pre-registered security setup, the login would fail because the web address it sent you back to didn't match what the app expected. This update fixes that mismatch, so you can sign in successfully.
Breaking changes
No breaking changes in this release.
How to upgrade
Update to Claude Code v2.1.231 by running:
claude updateThis is our plain-language summary. Read the complete, official notes on the Claude Code official changelog ↗.
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