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 agents-inc/skills --skill mobile-animation-skiagit clone --depth 1 https://github.com/agents-inc/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/agents-inc/skills/mobile-animation-skia)<a href="https://agentmods.dev/skills/agents-inc/skills/mobile-animation-skia"><img src="https://agentmods.dev/badge/skills/agents-inc/skills/mobile-animation-skia/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/agents-inc/skills/mobile-animation-skia"><img src="https://agentmods.dev/badge/skills/agents-inc/skills/mobile-animation-skia.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- 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 | $0.00039 | $0.04697 |
| Opus 5.5 | $0.00016 | $0.01879 |
| Sonnet 5.5 | $0.00008 | $0.00939 |
| Haiku 4.5 | $0.00004 | $0.00470 |
Grade A, and why
mobile-animation-skia 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.
How it starts
The opening of the file, as written. The whole thing — 520 lines — stays where its author put it; the contents beside it link to each section on GitHub.
React Native Skia Patterns
Quick Guide: Use
@shopify/react-native-skiafor GPU-accelerated 2D drawing in React Native. The Canvas component hosts a separate React renderer. Drawing primitives (Circle, Rect, Path, Image) compose declaratively. Paint attributes cascade through Groups. Animations use Reanimated shared values passed directly as props -- nocreateAnimatedComponentneeded. UseinterpolateColorsfrom Skia for color animations (not Reanimated'sinterpolateColor). Use Atlas for batch rendering thousands of sprites. Use Paragraph for rich text layout. Group transforms default to top-left origin, not center.
<critical_requirements>
CRITICAL: Before Using This Skill
(You MUST pass Reanimated shared values directly as Skia component props -- do NOT use createAnimatedComponent or useAnimatedProps)
(You MUST use interpolateColors from @shopify/react-native-skia for color animations -- Reanimated's interpolateColor uses a different internal color format and produces wrong results)
(You MUST use the layer property to apply paint effects to Paragraph, Picture, and ImageSVG components -- they do not follow standard paint inheritance rules)
(You MUST remember that Group transform origin defaults to top-left, not center -- set origin prop explicitly for center-based rotations)
</critical_requirements>
Auto-detection: react-native-skia, @shopify/react-native-skia, Canvas, Skia.Path, Skia.Paint, Circle, Rect, Path, Group, Paint, ImageSVG, BackdropBlur, BackdropFilter, RuntimeShader, Atlas, Paragraph, ParagraphBuilder, usePathInterpolation, useClock, useRSXformBuffer, SkSL, image filter, shader, offscreen, Picture, FitBox
When to use:
- Drawing custom 2D graphics (charts, diagrams, custom shapes)
- Applying GPU-accelerated blur, shadow, or color filter effects
- Animating paths, shapes, or shader uniforms at 60 FPS
- Rendering rich text with mixed fonts using Paragraph API
- Batch rendering sprites/tiles with Atlas
- Creating custom image filters with SkSL shaders
- Generating images offscreen (thumbnails, exports)
What ships with it
6 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 Changed · -4 lines 80ced7e6b4ae
- 1mo ago First seen · 524 lines · 39 tokens per session scan A 952c9757263b
mobile-animation-skia is a skill published in the GitHub repository agents-inc/skills (26 stars, last pushed yesterday), licensed MIT. It adds 39 tokens to every session and 4,697 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 2026-09-03.
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