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 Prisma-Labs-Dev/apple-skills --skill core-animationgit clone --depth 1 https://github.com/Prisma-Labs-Dev/apple-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/prisma-labs-dev/apple-skills/core-animation)<a href="https://agentmods.dev/skills/prisma-labs-dev/apple-skills/core-animation"><img src="https://agentmods.dev/badge/skills/prisma-labs-dev/apple-skills/core-animation.svg" alt="Measured on agentmods" 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 | $0.00062 | $0.01175 |
| Opus 5 | $0.00031 | $0.00588 |
| Sonnet 5 | $0.00012 | $0.00235 |
| Haiku 4.5 | $0.00006 | $0.00118 |
Grade A, and why
core-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 8d 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 — 65 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Core Animation Reference
Search these docs to answer questions about Core Animation (the QuartzCore framework). Use this skill when working directly with CALayer, layer-backed UIKit/AppKit views, explicit keyframe or spring animations on layer properties, particle systems, or per-frame callbacks via CADisplayLink.
For SwiftUI's declarative animation API (withAnimation, Animation, .animation(_:value:), transitions), use guide-swiftui-animations instead. For SwiftUI immediate-mode drawing, use swiftui/canvas.md and swiftui/graphicscontext.md.
Return Format
Always include:
- Summary — answer the question concisely.
- File paths — list relevant files for full details, e.g.:
calayer.mdfor layer geometry, contents, hierarchycabasicanimation.mdfor animating a single property between two valuescatransaction.mdfor batching, disabling implicit animations, or changing default duration
Files
| File | Content |
|---|---|
core-animation-index.md |
Full QuartzCore framework index — layer basics, animation classes, transactions, layer subclasses |
calayer.md |
CALayer — the root layer class: geometry, contents, hierarchy, layout, animations |
caanimation.md |
CAAnimation — abstract base class for all Core Animation animation types |
capropertyanimation.md |
CAPropertyAnimation — abstract subclass animating a single layer property |
cabasicanimation.md |
CABasicAnimation — interpolate a layer property between two values |
cakeyframeanimation.md |
CAKeyframeAnimation — animate a property through a sequence of keyframes |
caspringanimation.md |
CASpringAnimation — spring-based interpolation with mass, stiffness, damping |
caanimationgroup.md |
CAAnimationGroup — run multiple animations together with a shared duration |
catransition.md |
CATransition — fade, push, reveal, and move-in transitions between layer states |
camediatiming.md |
CAMediaTiming — protocol shared by layers and animations (beginTime, duration, repeat, speed) |
catransaction.md |
CATransaction — batch property changes, disable implicit animations, set default duration/timing |
catransform3d.md |
CATransform3D — 4×4 matrix used by CALayer.transform for 3D transforms |
cashapelayer.md |
CAShapeLayer — vector-shape layer driven by a CGPath (stroke, fill, line dash) |
cagradientlayer.md |
CAGradientLayer — axial, radial, and conic gradient layers |
caemitterlayer.md |
CAEmitterLayer — particle emitter layer (fire, smoke, confetti, sparkles) |
caemittercell.md |
CAEmitterCell — individual particle definition used by CAEmitterLayer |
careplicatorlayer.md |
CAReplicatorLayer — replicate a sublayer with offsets and transforms |
cametallayer.md |
CAMetalLayer — layer backed by a Metal drawable for GPU-rendered content |
catextlayer.md |
CATextLayer — layer that renders plain or attributed text |
catiledlayer.md |
CATiledLayer — tile-based asynchronous content rendering for large or zoomable layers |
cadisplaylink.md |
CADisplayLink — timer synchronized to the display's refresh rate |
What ships with it
21 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.
- caanimation.md 6.9 KB
- caanimationgroup.md 3.6 KB
- cabasicanimation.md 7.4 KB
- cadisplaylink.md 9.4 KB
- caemittercell.md 7.4 KB
- caemitterlayer.md 5.6 KB
- cagradientlayer.md 3.6 KB
- cakeyframeanimation.md 5.9 KB
- calayer.md 22 KB
- camediatiming.md 5.1 KB
- cametallayer.md 9.1 KB
- capropertyanimation.md 4.1 KB
- careplicatorlayer.md 6.0 KB
- cashapelayer.md 5.8 KB
- caspringanimation.md 4.5 KB
- catextlayer.md 4.1 KB
- catiledlayer.md 3.8 KB
- catransaction.md 6.5 KB
- catransform3d.md 4.5 KB
- catransition.md 5.6 KB
- core-animation-index.md 79 KB
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.
- 8d ago First seen · 65 lines · 62 tokens per session scan A 511e7eb9bb26
core-animation is a skill published in the GitHub repository Prisma-Labs-Dev/apple-skills (325 stars, last pushed 27d ago), licensed MIT. It adds 62 tokens to every session and 1,175 once invoked, about $0.0003 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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