Diffity Diff Skill You are opening the diffity diff viewer so the user can see their changes in the browser. Arguments ref (optional): Git ref to diff (e.g. main..feature , HEAD~3 ) or a GitHub PR URL (e.g. https://github.com/owner/repo/pull/123 ). Defaults to working tree changes. Instructions 1. Check that diffity is available: run which diffity . If not found, install it with npm install g diffity . 2. Run diffity <ref (or just diffity if no ref) using the Bash tool with run in background: true : The CLI handles everything: if an instance is already running for this repo it reuses it and opens the browser, otherwise it starts a new server and opens the browser. Do NOT use & or quiet — let the Bash tool handle backgrounding. 3. Wait 2 seconds, then run diffity list json to get the port. 4. Tell the user diffity is running. Print the URL and keep it short — don't show session IDs, hashes, or other internals. Example: Diffity is running at http://localhost:5391 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

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