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 catch-the-wave/fullstack-ios-claude-skills --skill swiftui-animationgit clone --depth 1 https://github.com/catch-the-wave/fullstack-ios-claude-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/catch-the-wave/fullstack-ios-claude-skills/swiftui-animation)<a href="https://agentmods.dev/skills/catch-the-wave/fullstack-ios-claude-skills/swiftui-animation"><img src="https://agentmods.dev/badge/skills/catch-the-wave/fullstack-ios-claude-skills/swiftui-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/catch-the-wave/fullstack-ios-claude-skills/swiftui-animation"><img src="https://agentmods.dev/badge/skills/catch-the-wave/fullstack-ios-claude-skills/swiftui-animation.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 | $0.00116 | $0.03850 |
| Opus 5.5 | $0.00046 | $0.01540 |
| Sonnet 5.5 | $0.00023 | $0.00770 |
| Haiku 4.5 | $0.00012 | $0.00385 |
Grade A, and why
swiftui-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 1mo 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 — 495 lines — stays where its author put it; the contents beside it link to each section on GitHub.
SwiftUI Animation (iOS 26+)
Review, write, and fix SwiftUI animations. Apply modern animation APIs with correct timing, transitions, and accessibility handling using Swift 6.3 patterns.
Contents
- Triage Workflow
- withAnimation (Explicit Animation)
- Implicit Animation
- Spring Type (iOS 17+)
- PhaseAnimator (iOS 17+)
- KeyframeAnimator (iOS 17+)
- @Animatable Macro
- matchedGeometryEffect (iOS 14+)
- Navigation Zoom Transition (iOS 18+)
- Transitions (iOS 17+)
- ContentTransition (iOS 16+)
- Symbol Effects (iOS 17+)
- Symbol Rendering Modes
- Common Mistakes
- Review Checklist
- References
Triage Workflow
Step 1: Identify the animation category
| Category | API | When to use |
|---|---|---|
| State-driven | withAnimation, .animation(_:body:), .animation(_:value:) |
Explicit state changes, selective modifier animation, or simple value-bound changes |
| Multi-phase | PhaseAnimator |
Sequenced multi-step animations |
| Keyframe | KeyframeAnimator |
Complex multi-property choreography |
| Shared element | matchedGeometryEffect |
Layout-driven hero transitions |
| Navigation | matchedTransitionSource + .navigationTransition(.zoom) |
NavigationStack push/pop zoom |
| View lifecycle | .transition() |
Insertion and removal |
| Text content | .contentTransition() |
In-place text/number changes |
| Symbol | .symbolEffect() |
SF Symbol animations |
| Custom | CustomAnimation protocol |
Novel timing curves |
Step 2: Choose the animation curve
// Timing curves
.linear // constant speed
.easeIn(duration: 0.3) // slow start
.easeOut(duration: 0.3) // slow end
.easeInOut(duration: 0.3) // slow start and end
// Spring presets (preferred for natural motion)
.smooth // no bounce, fluid
.smooth(duration: 0.5, extraBounce: 0.0)
.snappy // small bounce, responsive
.snappy(duration: 0.4, extraBounce: 0.1)
.bouncy // visible bounce, playful
.bouncy(duration: 0.5, extraBounce: 0.2)
// Custom spring
.spring(duration: 0.5, bounce: 0.3, blendDuration: 0.0)
.spring(Spring(duration: 0.6, bounce: 0.2), blendDuration: 0.0)
.interactiveSpring(response: 0.15, dampingFraction: 0.86)
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.
- 1mo ago First seen · 495 lines · 116 tokens per session scan A 3eb81386f92c
swiftui-animation is a skill published in the GitHub repository catch-the-wave/fullstack-ios-claude-skills (5 stars, last pushed 1mo ago), licensed MIT. It adds 116 tokens to every session and 3,850 once invoked, about $0.0005 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 2026-09-19.
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