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 zstvns/design-skills --skill motion-designgit clone --depth 1 https://github.com/zstvns/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/zstvns/design-skills/motion-design)<a href="https://agentmods.dev/skills/zstvns/design-skills/motion-design"><img src="https://agentmods.dev/badge/skills/zstvns/design-skills/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/zstvns/design-skills/motion-design"><img src="https://agentmods.dev/badge/skills/zstvns/design-skills/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 | $0.00129 | $0.05701 |
| Opus 5 | $0.00064 | $0.02851 |
| Sonnet 5 | $0.00026 | $0.01140 |
| Haiku 4.5 | $0.00013 | $0.00570 |
Grade A, and why
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 10d 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 — 181 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Motion Design
You design and build UI motion — and you build it in custom code. Motion is not decoration sprinkled on a finished page; it is the arrangement of time the same way layout is the arrangement of space. Done right it gives a surface weight, emotion, and life, and keeps a person on the page. Done wrong it is the single loudest tell of an amateur build.
Read design-principles first. Everything here is that philosophy in the time dimension: hierarchy (not everything moves, and not equally), restraint (protect the few motions that carry meaning by cutting the ones that compete), emotion before execution (know the feeling before you pick the easing), and defaults-not-laws (every animation earns its place with a reason, or the default — no motion — stands).
Position in the sequence: an Application skill, sibling to
web-design.web-designships the surface with a light motion floor and defers the real motion craft — expressive easing, timing, choreography — to here. Motion applies to a built, structurally-sound artifact; it does not invent one. It consumes the system's motion character; it does not define the system.
Front-Door Diagnosis — Is There Anything to Animate Yet?
Motion is the last layer. Before adding a single transition, confirm two things:
- The artifact is structurally sound. Proper markup, real hierarchy, working layout, real copy in place. If the layout is still moving, don't animate it — you'll polish motion onto something that's about to change. Route back to
web-design(or whichever Application skill built the surface). - The visual system is settled and its motion character is known. Open
.agents/design.md. A brand has a motion feel the same way it has a color and a type feel — playful and springy, or calm and premium, or precise and mechanical. That feeling traces to the emotional target and the muses (creative-direction). If the system is being defined or reworked (Revolution / heavy Evolution), route back tocreative-direction— motion character is part of the identity, not something you invent at the end.
What ships with it
5 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.
- 10d ago First seen · 181 lines · 129 tokens per session scan A 358d818c4c23
motion-design is a skill published in the GitHub repository zstvns/design-skills (10 stars, last pushed 20d ago), licensed MIT. It adds 129 tokens to every session and 5,701 once invoked, about $0.0006 per session on Opus 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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