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 iart-ai/web-animation-skills --skill 60fps-animationgit clone --depth 1 https://github.com/iart-ai/web-animation-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/iart-ai/web-animation-skills/60fps-animation)<a href="https://agentmods.dev/skills/iart-ai/web-animation-skills/60fps-animation"><img src="https://agentmods.dev/badge/skills/iart-ai/web-animation-skills/60fps-animation/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/iart-ai/web-animation-skills/60fps-animation"><img src="https://agentmods.dev/badge/skills/iart-ai/web-animation-skills/60fps-animation.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- Socket pass
- Snyk 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 | $0.00079 | $0.02678 |
| Opus 5 | $0.00039 | $0.01339 |
| Sonnet 5 | $0.00016 | $0.00536 |
| Haiku 4.5 | $0.00008 | $0.00268 |
Grade A, and why
60fps-animation 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 11d 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.
Copies of this mod
1 near-identical copy found in the catalogue:
- 60fps-animation — 100% identical, 0 lines differ
How it starts
The opening of the file, as written. The whole thing — 211 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Performant Web Animation
Eliminate the #1 cause of janky web animation: animating properties that force the browser to recalculate layout (reflow) or repaint on every frame. The browser renders in stages — layout → paint → composite. Animating width, height, top, left, margin, padding, box-shadow, or filter re-runs layout and/or paint each frame, blocking the main thread. Animating transform and opacity runs entirely on the compositor (often the GPU), skipping layout and paint, which is what makes animation smooth at 60/120fps.
When to use
Use when an animation stutters or drops frames, when a hover/scroll effect feels heavy, when animating size/position/shadow, when a layout change needs to animate smoothly (cards reordering, an element moving between containers), when animating height: auto, or when reviewing animation code for performance.
Core rule: animate only transform and opacity
Map every "expensive" animation to a cheap equivalent.
| Animating (expensive) | Triggers | Replace with (cheap) |
|---|---|---|
width / height |
Layout + Paint | transform: scaleX()/scaleY() (+ FLIP for true size) |
top / left / margin |
Layout + Paint | transform: translate() |
box-shadow |
Paint | Animate opacity of a pseudo-element holding the shadow |
filter: blur() |
Paint (heavy) | Cross-fade two layers via opacity, or accept sparingly |
background-position |
Paint | transform: translate() on a child layer |
color / background |
Paint | Often acceptable; or cross-fade layers |
Position and size via transform
/* BAD: animates layout every frame */
.box { transition: left 300ms, width 300ms; left: 0; width: 100px; }
.box:hover { left: 200px; width: 200px; }
/* GOOD: compositor-only */
.box {
transition: transform 300ms ease;
transform: translateX(0) scaleX(1);
transform-origin: left center;
}
.box:hover { transform: translateX(200px) scaleX(2); }
scaleX distorts inner content (text stretches). For true resizing without distortion, use FLIP.
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.
- 11d ago First seen · 211 lines · 79 tokens per session scan A deb5d78aabae
60fps-animation is a skill published in the GitHub repository iart-ai/web-animation-skills (20 stars, last pushed 2mo ago), licensed MIT. It adds 79 tokens to every session and 2,678 once invoked, about $0.0004 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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