Double Check

Automatic verification pass on a finished deliverable. The user should never have to re-check work themselves — this skill is that re-check.

What it is and is not

• It verifies outputs, it does not re-run the task. A full second run produces a second divergent version and a comparison problem; attacking the finished artifact catches the same errors at a fraction of the cost.
• It runs after the work is complete and before it is delivered.
• It never runs on its own output. One double-check per deliverable. Fixes triggered by a FAIL get their specific failed check re-run — not a whole new panel. No recursion.

When it runs