Visual verification as the Definition of Done for any change with a runtime surface (a rendered page, a UI, a live view). Use whenever you are about to call a UI or frontend change done, before moving an item to done, whenever an item is marked ui: true, or when someone asks "does it actually render / work". Proves behavior by driving the real thing in a browser and measuring computed layout - a passing pytest, a served file, a node check, or a subagent code-review is NOT proof. Applies inside subagents too: if you built or touched a runtime surface, run this before claiming done.
How to install verify?
marcel-bich/marcel-bich-claude-marketplace/verify
$npx -y skills add marcel-bich/marcel-bich-claude-marketplace --skill verifyInstalls into the current project.
›Prefer a prompt? Paste this to your agent
Run `npx skills use "https://github.com/marcel-bich/marcel-bich-claude-marketplace" --skill "marcel-bich/marcel-bich-claude-marketplace/verify"` and follow the generated skill instructions now. Read its complete output, redirecting it to a temporary file first if necessary. Resolve relative paths from the supporting-files directory it provides.
Use the skills in "https://github.com/marcel-bich/marcel-bich-claude-marketplace" that are relevant to the current task. Run `npx skills add "https://github.com/marcel-bich/marcel-bich-claude-marketplace"` and select the relevant skills, then follow their instructions.
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