Claude Code 2.1.91 — Release Notes & Changelog

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)

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`

Plugins can now ship executables under `bin/` and invoke them as bare commands from the Bash tool
`/feedback` now explains why it's unavailable instead of disappearing from the slash menu
Edit tool now uses shorter `old_string` anchors, reducing output tokens

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

Never miss a Claude Code release.

Get a push notification the moment the next version ships.