seedance-motion

Reference resolution: [ref:<name>] resolves to ../seedance-20/references/<name>.md (the seedance-20 skill's vendored reference corpus); [skill:<name>] is the sibling skill of that name.

Use physical verbs and consequences. Motion should be observable on screen, timed within the clip, and assigned to a subject or object. Prefer one strong action with a visible endpoint over several vague actions competing for attention.

Load [ref:reference-workflow] for video-motion references, [ref:shot-list-continuity] for action handoffs across shots, and [ref:examples-by-mode] for safe edit, extend, and R2V patterns.

Motion Contract

State: actor/object, action, force level, timing, physical consequence, continuity requirement, and endpoint.

Motion type	Strong phrase	Weak phrase
Subtle acting	`Character A inhales, grips the cup tighter, then sets it down without looking away`	`she feels nervous`
Product material	`condensation beads gather, merge, and slide down the bottle neck`	`the product looks refreshing`
Choreography	`Character B ducks under the swinging bag, pivots left, and stops in a guarded stance`	`fast action fight scene`
Object physics	`paper receipt lifts in the fan breeze, flips once, and lands face-up`	`papers move dynamically`
Environmental motion	`rain streaks diagonally across the backlight while puddle ripples spread from footsteps`	`stormy weather atmosphere`