Claude Code Mods

Small TypeScript add-ons that change how Claude Code behaves and looks, for Claude Code users in the terminal or desktop app.

Mods can rewrite a prompt before it reaches the model, block or retry tool calls, approve or deny permission requests, hide secrets in tool output, and add or replace parts of the interface
You write one in a few lines of TypeScript or ask Claude Code to build it. Mods ship inside plugins and install with /plugin
Anthropic's examples include Token Weather (shows how full your context window is), Blast Radius (catches risky commands like rm -rf before they run), and Replay Theater (step through every file edit with /replay)
The /diff view now runs as a built-in mod you can turn off or customize, and a built-in 'You should know' mod adds a side agent that flags things you or Claude might miss
On Team and Enterprise plans a security mod loads first to block risky changes
Mods run with full access to your machine and no sandbox, so only install them from sources you trust