Claude Code 2.1.91 release notes

Version

2.1.91

Released

2 April 2026

Status

Stable release

What's new in Claude Code 2.1.91

The official notes for Claude Code 2.1.91 list 13 changes: 3 new features, 5 fixes, 1 performance improvement and 4 other changes.

• 3 new features
• 5 fixes
• 1 performance improvement
• 4 other changes

Highlights

• new feature Added MCP tool result persistence override via _meta["anthropic/maxResultSizeChars"] annotation (up to 500K), allowing larger results like DB schemas to pass…
• new feature Added disableSkillShellExecution setting to disable inline shell execution in skills, custom slash commands, and plugin commands
• new feature Added support for multi-line prompts in claude-cli://open?q= deep links (encoded newlines %0A no longer rejected)
• performance improvement Improved performance: faster stripAnsi on Bun by routing through Bun.stripANSI
• fix Fixed transcript chain breaks on --resume that could lose conversation history when async transcript writes fail silently

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 2.1.91)

All Claude Code release notes · All releases

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