The JSON Schema of a model's input object. `x-lumeta-option-min-plan` on a field marks choices that need a higher plan than the model itself. `x-lumeta-max-length-profiles` gives a text limit per choice of another field (Seedance `prompt`: 3,500 on engine 2.0, 31,500 on 2.5); `maxLength` is the largest of them. `x-lumeta-max-seconds-profiles` does the same for a media field's clip length (Seedance `video_urls` and `audio_urls`: 15 s on engine 2.0, 30 s on 2.5); `x-lumeta-max-seconds` is the largest, and a longer clip is cut to its first seconds.