Creation API
POST /creations is the only write endpoint. Every request has type, prompt, optional instructions, optional inputFileIds, and type-specific options.
{ "type": "image", "prompt": "A clear cover image for a climate report", "image": { "aspectRatio": "16:9" }}Use GET /creations, GET /creations/{creation_id}, and GET /creations/{creation_id}/outputs. IDs are opaque strings; never construct asset URLs.