motion-frames

# Motion Frames Skill Produce a single full-bleed motion composition. Inline CSS animations only — the page is the loop. Treat it as a poster frame that an exporter (HyperFrames, Lottie, etc.) can capture into a video. ## Workflow 1. **Read the active DESIGN.md** (injected above). Motion lives or dies on typography contrast — pick the most expressive serif / display token in the DS for the headline; the body / mono token labels everything else. 2. **Compose** the canvas as a 16:9 hero with these layers, back to front: - **Stage** — full-bleed `<main>`. Off-white or DS-canvas background, very subtle dotted grid texture (CSS background, `radial-gradient` dots at 22–32px intervals). - **Concentric rings** — 2–3 SVG circles radiating from a focal point. Ultra-thin strokes (0.5–1px) in DS-foreground at low opacity. These rotate at different speeds (60s, 90s, 180s). - **Focal mark** — a wireframe globe, a stylized object, or a typographic monogram drawn as inline SVG. ~28% of the canvas wide. - **Ring labels** — short words / phonetic tokens placed around one of the rings (e.g. "Hola · Bonjour · 你好 · नमस्ते"). They co-rotate with the ring, with `<text>` paths counter-rotated so the words stay upright. - **Headline** — bottom-left or center-bottom. Display serif, italic accent on one word. Add a subtle `letterSpacing` + opacity reveal animation (`@keyframes type-in`). - **Frame chrome** — corner stamps (top-left lab tag, top-right brand or issue number) and a thin baseline rule. Static. 3. **Animate** with `@keyframes` only — no JS: - `rotate-slow`, `rotate-med`, `rotate-fast` for rings. - `globe-spin` for the focal mark. - `pulse` for the focal dot, ~2s, easing. - `marquee-fade` to reveal headline once on load. 4. **Write** a single HTML document: - `<!doctype html>` through `</html>`, CSS inline. - All motion uses CSS — no scripts, so HyperFrames or any frame-grabber can capture it deterministically. - `data-od-id` on stage, focal, ring, headline, chrome. 5. **Self-check**: - The composition still reads as a poster with motion paused at frame 0. - At least 3 layers move at different speeds (depth comes from delta velocity, not parallax tricks). - Accent appears once — usually the italic word in the headline. ## Output contract Emit between `<artifact>` tags: ``` <artifact identifier="motion-slug" type="text/html" title="Motion — Title"> <!doctype html> <html>...</html> </artifact> ``` One sentence before the artifact, nothing after.