Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add divyanshu-iitian/agent-website-design-skills --skill product-motion-designgit clone --depth 1 https://github.com/divyanshu-iitian/agent-website-design-skillsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/divyanshu-iitian/agent-website-design-skills/product-motion-design)<a href="https://agentmods.dev/skills/divyanshu-iitian/agent-website-design-skills/product-motion-design"><img src="https://agentmods.dev/badge/skills/divyanshu-iitian/agent-website-design-skills/product-motion-design/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/divyanshu-iitian/agent-website-design-skills/product-motion-design"><img src="https://agentmods.dev/badge/skills/divyanshu-iitian/agent-website-design-skills/product-motion-design.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00052 | $0.00545 |
| Opus 5.5 | $0.00021 | $0.00218 |
| Sonnet 5.5 | $0.00010 | $0.00109 |
| Haiku 4.5 | $0.00005 | $0.00055 |
Grade A, and why
product-motion-design scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 44 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Product Motion Design
Use motion to explain hierarchy, causality, state, and spatial relationships. Do not animate a page merely to make it look expensive.
Workflow
- Identify the user task, focal action, state changes, and moments where motion can improve comprehension.
- Define a motion hierarchy: page entrance, section reveal, component transition, feedback, and ambient motion.
- Choose the lightest mechanism that fits: CSS for simple states, the existing React animation library for component lifecycle, GSAP for coordinated timelines or scroll, and Three.js only for a real 3D requirement.
- Establish duration, easing, distance, stagger, interruption, and reduced-motion rules before implementation.
- Scope animation selectors to component roots. Register plugins once and clean timelines, observers, listeners, frames, geometries, materials, textures, and renderers on teardown.
- Keep layout stable. Animate transform and opacity where possible; avoid perpetual main-thread work and broad
transition: all. - Adapt density and choreography for touch, narrow containers, low-power devices, and hidden tabs.
- Verify real pixels, interaction, resize behavior, and nonblank canvas output at mobile and desktop widths.
Motion Rules
- Interaction feedback is immediate; decorative motion yields to input.
- Scroll animation must preserve reading order and usable content without JavaScript.
- Repeated lists use restrained stagger and a cap; they do not replay on every tiny scroll.
- 3D scenes cap pixel ratio, pause when hidden, resize from the actual container, and provide a static reduced-motion frame.
- Theme changes must update 3D materials and backgrounds without making the focal object disappear.
- Do not add cursor-following effects to touch-only experiences or controls requiring precision.
Delivery Contract
Return or implement:
- Motion intent - what each animation communicates.
- Choreography - triggers, sequence, timings, and interruption behavior.
- Implementation - scoped code using the existing stack.
- Performance contract - cleanup, device adaptation, and rendering budget.
- Accessibility - reduced-motion and no-JavaScript behavior.
- Proof - browser observations or screenshots at relevant states and viewports.
What ships with it
2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 1mo ago First seen · 44 lines · 52 tokens per session scan A 8ab558eb7297
product-motion-design is a skill published in the GitHub repository divyanshu-iitian/agent-website-design-skills (4 stars, last pushed 2mo ago), licensed MIT. It adds 52 tokens to every session and 545 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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