Diffity Start Skill

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