Claude Code 2.1.238 release notes

Version

2.1.238

Released

20 August 2026

Status

Stable release

What's new in Claude Code 2.1.238

The official notes for Claude Code 2.1.238 list 39 changes: 3 new features, 23 fixes, 1 performance improvement, 1 security change and 11 other changes.

• 3 new features
• 23 fixes
• 1 performance improvement
• 1 security change
• 11 other changes

Highlights

• security change MCP headersHelper from a project .mcp.json, plugin, or agent file runs without inherited credential env vars; user, managed and claude.ai-scope…
• new feature Added a keybindingFlavor setting: set it to "readline" to make Ctrl+W in the prompt delete back to the previous whitespace…
• new feature Added claude self-hosted-runner --defer-shutdown-max-min <minutes>: on SIGTERM, keep serving attached sessions, park what is left after that many minutes, then…
• new feature Added claude self-hosted-runner --proxy-authorization-command / --proxy-authorization-file for egress proxies that require a freshly issued Proxy-Authorization header on every connection
• performance improvement Improved startup responsiveness: the automatic update check now runs about 10 seconds after launch instead of competing with startup for…

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 2.1.238)

All Claude Code release notes · All releases

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