Owl-Listener/designer-skills is a collection of AI-agent skills, commands, and plugins for design work, covering research, design systems, interfaces, interaction, and delivery. Designers and developers use it inside coding assistants to guide design tasks, and the catalogue entries represent selected parts of that larger collection.
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 Owl-Listener/designer-skills --skill motion-systemgit clone --depth 1 https://github.com/Owl-Listener/designer-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/owl-listener/designer-skills/motion-system)<a href="https://agentmods.dev/skills/owl-listener/designer-skills/motion-system"><img src="https://agentmods.dev/badge/skills/owl-listener/designer-skills/motion-system/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/owl-listener/designer-skills/motion-system"><img src="https://agentmods.dev/badge/skills/owl-listener/designer-skills/motion-system.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- Socket pass
- Snyk pass
- NVIDIA SkillSpector pass
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 | $0.00048 | $0.01013 |
| Opus 5 | $0.00024 | $0.00507 |
| Sonnet 5 | $0.00010 | $0.00203 |
| Haiku 4.5 | $0.00005 | $0.00101 |
Grade A, and why
motion-system 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 13d 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 — 59 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Motion System
You are an expert in defining motion as a systematic design token layer, not a collection of one-off animations.
What You Do
You define the motion vocabulary for a product — duration scales, easing curves, choreography rules, and accessibility handling — so animation decisions are consistent, purposeful, and implementable by any team.
Why a Motion System
Without a system, animation decisions are made ad hoc: each component has its own duration and easing, transitions feel inconsistent, and there's no shared language between design and engineering. A motion system makes animation decisions as deliberate as color or type choices.
Duration Tokens
Define a small set of named duration values. Example scale:
| Token | Value | Use |
|---|---|---|
duration-instant |
50ms | State changes that must feel immediate (checkbox tick, toggle) |
duration-fast |
100ms | Small element transitions (tooltip appear, chip dismiss) |
duration-normal |
200ms | Default for most transitions (dropdown open, focus ring) |
duration-moderate |
300ms | Medium element transitions (modal entry, panel slide) |
duration-slow |
400ms | Page-level transitions, complex choreography |
duration-deliberate |
600ms | Intentionally paced, high-emphasis moments (onboarding reveal) |
| Don't create more tokens than you have distinct use cases. 4–6 values is usually enough. |
Easing Tokens
Define named easing curves mapped to semantic use cases:
| Token | Curve | Use |
|---|---|---|
ease-standard |
cubic-bezier(0.2, 0, 0, 1) | Most UI transitions — elements moving between states |
ease-decelerate |
cubic-bezier(0, 0, 0.2, 1) | Elements entering the screen |
ease-accelerate |
cubic-bezier(0.3, 0, 1, 0.3) | Elements leaving the screen |
ease-spring |
spring / cubic-bezier(0.34, 1.56, 0.64, 1) | Playful or tactile interactions (FAB expand, drawer bounce) |
ease-linear |
linear | Looping animations only (progress spinners, shimmer) |
Choreography Rules
When multiple elements animate together:
- Stagger: related elements entering together stagger by 30–50ms; lead with the most important
- Coordination: elements in the same semantic group use the same duration and easing
- Sequence total: total duration of a staggered sequence should not exceed 500ms
- Direction consistency: if elements slide in from the right, related outgoing elements slide out to the left
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.
- 13d ago First seen · 59 lines · 48 tokens per session scan A fda71131019e
motion-system is a skill published in the GitHub repository Owl-Listener/designer-skills (2,619 stars, last pushed 7d ago), licensed MIT. It adds 48 tokens to every session and 1,013 once invoked, about $0.0002 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 2026-08-30.
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