One idea, six lanes, a Seedance 2.0 prompt at the end

Seedance 2.0 generates 4 to 15 seconds at a time, from text or from up to twelve reference files addressed with @. Most prompts fail for the same handful of reasons: a reference with no stated job, a camera that is told to hold still and orbit at once, more action than the seconds can hold. This app plans the piece, locks the cast, boards the scene, writes the prompt - and checks it.

The checker is free and needs no account. It runs in your browser, in English and Chinese, against the platform's own limits and the upstream skills' named mistakes. Every lane also ships a worked example that costs nothing. Writing a package needs credits.