07 · Broken payloads. A 404, invalid JSON, wrong shape, and an array of rubbish. PASS: every dashed box below is empty except the last, which renders its one valid row. The page itself must remain completely intact, with at most a console warning each.

404 content URL

Invalid JSON

Right JSON, wrong shape

Array of rubbish + one valid item

Mount selector matches nothing

If you can read this, the host page survived.