Manage a Canvas through its business tools only — initialize and query projects, create Elements and Content candidates, frame Elements, wait on generation, and process design markers. Use when the user asks to create, edit, or generate anything on a Canvas, such as images, videos, storyboards, video edits, or a final composed video, or when the message contains [@design_canvas_project:...] or [@design_marker:...]. Also use when the user says 'generate an image on my canvas', 'make a video from this canvas project', 'add a new element to my design', or 'edit the marked region of this image'. Layout strategies, Connections, video point estimation, video composition, image search, asset reconciliation, and prompt inspiration live in the references.