Claude Code v2.1.191 Changelog

This release is all about making Claude Code smoother, faster, and much less distracting to use. It introduces a handy "undo" feature for your chat history, slashes the amount of computer power the app uses, and fixes dozens of annoying little bugs—like screens jumping around while you are trying to read. If you use Claude in your terminal for long coding sessions, this update will make your daily workflow feel a lot more stable and responsive.

What's new

• An "undo" button for cleared chats: If you accidentally wipe your chat history using the /clear command, you can now type /rewind to instantly bring your conversation back.

Improvements

• Lower computer usage: Claude Code now uses about 37% less processor power (CPU) when streaming text to your screen. It does this by grouping text updates together every tenth of a second instead of updating the screen constantly.
• Less memory hogging: If you keep Claude Code open for hours, it will now use much less computer memory (RAM) by being smarter about how it stores old text history.
• Fewer annoying permission prompts: When Claude tries to connect to the internet from its safe testing environment (called a *sandbox*), and you grant it permission, it will now remember your choice for the rest of your session instead of asking you every single time.
• Smarter connections to external tools: When Claude connects to external tools (using a system called MCP, or Model Context Protocol), it is now much more resilient. If your internet hiccups, Claude will automatically retry the connection. If you are working in a "headless" environment (a terminal with no web browser), it will skip trying to open a browser window and just give you a link to copy and paste.
• Better error messages: If Claude can't find an external tool (resulting in a "404 Not Found" error), it will now show you the exact web address it tried to reach and point you to your settings file so you can fix it.
• Vim mode search hints: If you use Vim mode (a keyboard-only way of navigating text) to search through your past prompts, the app now gives you a helpful hint on how to quickly find slash commands.

Fixes

• No more jumping screens: Fixed an annoying bug where the screen would forcefully scroll to the bottom while Claude was still typing, even if you were trying to scroll up to read older messages.
• Permanently stopping background tasks: Stopped "ghost" background agents (mini AI helpers running tasks in the background) from coming back to life after you explicitly stopped them. Now, when you stop them, they stay stopped.
• Clearer block messages: If your school or company blocks the /voice feature, the app will now clearly tell you *why* it's blocked instead of just showing a generic "not available" error.
• Fixed broken links in Windows: Fixed a bug in Windows Terminal where login links would get cut off and break if they were too long and wrapped to a new line.
• Fixed links in advanced terminal setups: Fixed Command+Clicking on links when using specific terminal setups, like Ghostty over SSH (connecting to a remote computer) or tmux (a tool for managing multiple terminal screens).
• Cleaner background task logs: When background agents are working, typing commands like /usage will no longer accidentally get sent to the AI as a prompt. Also, if you paste an image, the logs will now neatly say [Image #1] instead of cluttering the screen with the long, ugly file path of where the image is saved on your computer.
• Fixed automatic triggers (hooks): Fixed "hooks" (automatic actions that run when certain events happen) failing to run if you listed multiple programming environments separated by commas (like "Bash,PowerShell").
• Remembering your permission choices: In the /permissions menu, if you changed your mind and approved a previously blocked action, the app would forget your choice when you closed it. It now properly saves your decision.
• Visual layout fixes: Shrunk the welcome art so it fits perfectly inside a standard-sized Mac terminal window without spilling over the edges, and fixed a minor visual glitch where lists of active agents would awkwardly jump when scrolling.
• Reliable settings for school/work computers: For IT administrators managing settings on multiple computers,