[Release] anthropics/claude-code v2.1.218: v2.1.218

Claude Code v2.1.218 introduces significant improvements to code review workflows, accessibility features, and bug fixes. Key changes include running `/code-review` as a background subagent to reduce conversation clutter, enhanced screen-reader support with deletion announcements, and fixes for critical issues like Windows path corruption and multi-line paste handling. The release also improves error handling, trust dialogs, and agent configuration validation while refining auto-mode behavior and MCP server connectivity reporting.

Key Points

• •Code review now runs as background subagent, keeping conversation clean while maintaining stacked slash commands as review targets
• •Enhanced accessibility: screen-reader announcements added for text deletions (Option+Delete, Ctrl+W, Cmd+Backspace, Ctrl+U, Ctrl+K)
• •Fixed Windows path corruption where \u-prefixed segments (e.g., C:\Users\unicorn) were converted to CJK characters, making files inaccessible
• •Improved left arrow key behavior: now confirms before discarding conversation, with Esc returning to backgrounded conversation
• •Enhanced MCP connectivity: `/mcp` and `claude mcp list` now display HTTP status codes and error text for failed server connections
• •Fixed multi-line paste issue where newlines were collapsed into 'j' characters in certain terminals (Ctrl+J encoding)
• •Improved `/ultrareview` to accept descriptive arguments and run cloud reviews in non-interactive sessions
• •Agent markdown files now reject agent names containing ':' (reserved for plugin namespacing)
• •Skills with `context: fork` now run in background by default; can opt out with `background: false`
• •Enhanced boolean value support in frontmatter: yes/no/on/off/1/0 now accepted alongside true/false (case-insensitive)

Workflow Diagram

Concepts