Consult when verifying implementations visually or with tests.
[ ] Content loaded
[ ] Shows the specific change
[ ] No visual bugs
[ ] Caption explains what user sees
If screenshot shows problem:
Never send "I noticed X is wrong, will fix" - fix first.
When verifying API endpoints, show actual output:
GET /api/users -> {"id": 1, "name": "test"}
Include actual response, not just "it works".
Number sequential states: "1/4: Form", "2/4: Loading", "3/4: Error", "4/4: Success"