[Release] anthropics/claude-code v2.1.191: v2.1.191

Claude Code v2.1.191 introduces conversation resumption with `/rewind`, fixes critical UI issues like scroll jumping and agent resurrection, improves MCP server reliability with retry logic, and optimizes performance by reducing CPU usage during streaming by ~37%. The release addresses 20+ bugs across agent management, permissions, sandbox networking, and terminal compatibility while enhancing error messaging and user experience.

Key Points

• •Added `/rewind` command to resume conversations from before `/clear` was executed
• •Fixed scroll position jumping during streaming responses when reading earlier output
• •Permanently stopped background agents from resurrecting after being stopped from tasks panel
• •Improved `/voice` error messaging to explain organization policy restrictions instead of generic 'not available' message
• •Fixed MCP server reliability with automatic retry logic for transient network errors in capability discovery and OAuth flows
• •Optimized CPU usage during streaming by ~37% through text update coalescing at 100ms intervals
• •Enhanced sandbox network permissions to remember allowed hosts for the session duration
• •Fixed hooks with comma-separated matchers (e.g., 'Bash,PowerShell') that were silently failing
• •Improved MCP error messages to display URLs and configuration guidance for HTTP 404 errors
• •Reduced long-session memory growth by optimizing terminal output cache

Workflow Diagram

Concepts