Diffity Start Skill

You are starting the diffity diff viewer so the user can see their changes in the browser.

Instructions

1. Check that diffity is available: run which diffity. If not found, install it with npm install -g diffity.

2. Start the server using the Bash tool with run_in_background: true:

   • Command: diffity
   • Do NOT use & or --quiet — let the Bash tool handle backgrounding
   • The browser will open automatically and the session is auto-created on startup

3. Wait 2 seconds, then verify the session exists by checking that .diffity/current-session file is present.

4. Tell the user diffity is running and show them what they can do next. Keep it short — don't show session IDs, hashes, or other internals. Example:

   Diffity is running — check your browser.

   When you're ready:

   • Leave comments on the diff in your browser, then run /diffity-resolve to fix them
   • Or run /diffity-review to get an AI code review