Claude Code 2.1.239 release notes

Version

2.1.239

Released

21 August 2026

Status

Stable release

What's new in Claude Code 2.1.239

The official notes for Claude Code 2.1.239 list 59 changes: 3 new features, 37 fixes, 1 security change and 18 other changes.

• 3 new features
• 37 fixes
• 1 security change
• 18 other changes

Highlights

• security change Fixed Claude Code hanging at startup behind an HTTPS proxy when using Bedrock with an SSO profile and awsAuthRefresh …
• new feature Added the one-time fullscreen renderer offer on Bedrock, Vertex, Foundry and other previously excluded setups; new installs there now start…
• new feature Added /claude-api upgrade to migrate Python projects from anthropic 0.x to 1.x, and updated the skill's Python reference for 1.x…
• new feature Windows: cross-session messaging is now available, so Claude Code sessions across your machines can message each other with SendMessage and…
• fix Fixed Bedrock streaming behind proxies that strip the response Content-Type header, which silently doubled billed API calls by re-running every…

Our short summary: changes are counted and classified automatically from the official notes, and highlights are shortened. The complete, authoritative list is in the official release notes on GitHub.

Full release notes on GitHub (Claude Code 2.1.239)

All Claude Code release notes · All releases

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