# Physics

> Spring-based interaction for ultraweb builds — magnetic hover, drag with constraints, cursor followers, and gesture response using motion/react springs (stiffness/damping recipes included). GATED — only for briefs whose DIRECTION.md names a playful/tactile/interactive motion stance; budget 1–2 physics moments per site. Invoke in the ultraweb motion phase (Phase 9) when DIRECTION.md calls for it, or when the user says "magnetic button", "draggable", "cursor follower", "springy", "make it feel tactile/playful", or "elements should react to the mouse".

## Facts
- Page: https://tashan.sh/capability/skill-blyatiful1-physics
- tashan id: skill:blyatiful1/physics
- Source: https://github.com/blyatiful1/ultraweb
- Type: skill
- Category: design
- tashan score: not scored (catalogued only — too little public evidence)
- Adoption: 9.0
- Upkeep: 99.0
- Freshness: 97.0
- Evidence coverage: 84% of the inputs this score can use
- Health: active
- Instruction depth: not yet graded
- License: MIT
- Official: no

## Install

```sh
cp -r physics ~/.claude/skills/
```

## Security audit
Not scanned. We audit npm-published capabilities; this one has no npm package we can resolve, or has not reached the queue. This is not a clean bill of health.

---
Measured 2026-08-23 by tashan (https://tashan.sh) from public evidence. Scorer s5.