Claude Code 2.1.91

Thursday, 2 April 20263 new5 fixes5 other

AI summary

Written by AI from the official notes. Check them for exact details.

Claude Code 2.1.91 introduces new features for result handling and command execution, along with several bug fixes.

Added MCP tool result persistence override for larger results up to 500K.
Introduced setting to disable inline shell execution in skills and commands.
Support for multi-line prompts in deep links now available.
Plugins can ship executables under bin/ and invoke them directly.
Fixed issues with transcript history and command deletions in various terminals.

Why it matters: Developers and users of Claude should review these changes to enhance their coding and command execution experience.

Added MCP tool result persistence override via _meta["anthropic/maxResultSizeChars"] annotation (up to 500K), allowing larger results like DB schemas to pass through without truncation
Added disableSkillShellExecution setting to disable inline shell execution in skills, custom slash commands, and plugin commands
Added support for multi-line prompts in claude-cli://open?q= deep links (encoded newlines %0A no longer rejected)
Plugins can now ship executables under bin/ and invoke them as bare commands from the Bash tool
Fixed transcript chain breaks on --resume that could lose conversation history when async transcript writes fail silently
Fixed cmd+delete not deleting to start of line on iTerm2, kitty, WezTerm, Ghostty, and Windows Terminal
Fixed plan mode in remote sessions losing track of the plan file after a container restart, which caused permission prompts on plan edits and an empty plan-approval modal
Fixed JSON schema validation for permissions.defaultMode: "auto" in settings.json
Fixed Windows version cleanup not protecting the active version's rollback copy
/feedback now explains why it's unavailable instead of disappearing from the slash menu
Improved /claude-api skill guidance for agent design patterns including tool surface decisions, context management, and caching strategy
Improved performance: faster stripAnsi on Bun by routing through Bun.stripANSI
Edit tool now uses shorter old_string anchors, reducing output tokens

Full release notes13 changes

Added MCP tool result persistence override via _meta["anthropic/maxResultSizeChars"] annotation (up to 500K), allowing larger results like DB schemas to pass through without truncation
Added disableSkillShellExecution setting to disable inline shell execution in skills, custom slash commands, and plugin commands
Added support for multi-line prompts in claude-cli://open?q= deep links (encoded newlines %0A no longer rejected)
Plugins can now ship executables under bin/ and invoke them as bare commands from the Bash tool
Fixed transcript chain breaks on --resume that could lose conversation history when async transcript writes fail silently
Fixed cmd+delete not deleting to start of line on iTerm2, kitty, WezTerm, Ghostty, and Windows Terminal
Fixed plan mode in remote sessions losing track of the plan file after a container restart, which caused permission prompts on plan edits and an empty plan-approval modal
Fixed JSON schema validation for permissions.defaultMode: "auto" in settings.json
Fixed Windows version cleanup not protecting the active version's rollback copy
/feedback now explains why it's unavailable instead of disappearing from the slash menu
Improved /claude-api skill guidance for agent design patterns including tool surface decisions, context management, and caching strategy
Improved performance: faster stripAnsi on Bun by routing through Bun.stripANSI
Edit tool now uses shorter old_string anchors, reducing output tokens