ss-motion

name	ss-motion
description	Apply a named StyleSeed motion seed (Spring/Silk/Snap/Float/Pulse) to a component or interaction, translating vibe words into framer-motion params

Motion Seed Applier

When NOT to use

• For general framer-motion docs or learning → use the framer-motion site
• For non-React motion (CSS-only transitions, GSAP) — this skill targets motion.X JSX only
• For full scroll-linked timelines or parallax — out of scope per DESIGN-LANGUAGE.md Rule 59
• For tweaking the existing FadeIn/FadeUp/Stagger wrappers — edit engine/components/ui/motion.tsx directly

Vibe → Seed mapping

Translate the user's prompt to one of the five seeds before applying. Use this lookup table from engine/motion/index.ts:

Words the user might say	Seed
bouncy, springy, playful, energetic, alive	Spring
smooth, silky, fluid, elegant, composed, continuous	Silk
snappy, quick, instant, decisive, sharp, precise	Snap
floaty, gentle, weightless, dreamy, ambient, drifting	Float
rhythmic, punchy, pulsing, heartbeat, beat	Pulse
"Toss style", "Arc style"	Spring (per brand default)
"Stripe style", "Notion style"	Silk
"Linear style", "Raycast style", "Vercel style"	Snap

If the user says only a brand name, use that brand's default seed from BRAND_DEFAULT_SEED. If the user is explicit about a seed name (spring, silk, etc.), respect it verbatim.

Context detection

Infer one of the five contexts from the prompt:

• "on hover" / "when hovered" → hover
• "on press" / "on tap" / "on click" → press
• "when it appears" / "on mount" / "entering" → entrance
• "when it leaves" / "on close" / "exiting" → exit (requires <AnimatePresence>)
• "when layout changes" / "FLIP" / "rearranging" → layout

If ambiguous, default to entrance. If multiple contexts are reasonable (e.g., a button needs both hover and press), apply both.

Application steps

Apply seed: $0 · Context: $1 · Target: $ARGUMENTS

1. Read the target file at the path given (or, if no path was given, ask the user which file). Locate the JSX element the user is talking about — usually a <button>, <div>, <Card>, or similar.

2. Confirm the import paths. The component file must be able to import:

   • motion (and AnimatePresence for exit) from "framer-motion"
   • the chosen seed from "@engine/motion" — in a project that doesn't use the @engine/* alias, use a relative path to engine/motion

3. Replace the target tag with a <motion.X> and spread the seed's recipe:

   // hover example
   <motion.button {...spring.hover}>Save</motion.button>
   
   // press + hover combined
   <motion.button {...spring.press} {...spring.hover}>Save</motion.button>
   
   // entrance (mount)
   <motion.div {...silk.entrance}>...</motion.div>
   
   // exit (requires AnimatePresence wrapper somewhere up the tree)
   <AnimatePresence>
     {open && <motion.div {...silk.entrance} {...silk.exit} />}
   </AnimatePresence>
   
   // layout (FLIP)
   <motion.div {...snap.layout}>...</motion.div>
   

4. Do NOT inline the params. The whole point of the seed is that the values come from one source. Never expand { type: "spring", stiffness: 300, damping: 18 } into the JSX — always spread the recipe.

5. Respect prefers-reduced-motion in long-running surfaces. For one-off interactions (hover/press), framer-motion already throttles. For mount/exit/layout sequences in a long-lived page, import usePrefersReducedMotion and REDUCED_TRANSITION from @engine/motion and override the transition when reduced motion is on.

6. Validate by re-reading the file and confirming the JSX still parses (matching brackets, motion tag closed, AnimatePresence in place if exit was used).

7. Tell the user which seed and context you applied, and offer one related context they might want next ("Want press too so it feels clickable?").

Defaults if the user is vague

• No file given → ask "which file?"
• No vibe word → ask "any vibe word, brand, or seed name?"
• Vibe is "natural" or "feel like a real app" → default to Silk (the safest of the five)
• Element is a CTA button → also apply press

Forbidden

• Do not invent new seed names. There are exactly five.
• Do not edit engine/motion/seeds/*.ts from this skill — those are calibrated by hand. Add a new seed only via a separate, explicit ask.
• Do not introduce a third-party animation lib (gsap, anime.js). StyleSeed targets framer-motion exclusively.
• Do not add scroll-linked, parallax, or infinite animations (DESIGN-LANGUAGE.md Rule 59).