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SwiftUI Animation (iOS 26+) · dpearson2699 | DecimalAI

frontendby dpearson2699

SwiftUI Animation (iOS 26+)

dpearson2699/swiftui-animation

Source dpearson2699/swift-ios-skills ↗License NOASSERTION

Implement, diagnose, or review SwiftUI motion using explicit and scoped implicit animations, springs, transitions, PhaseAnimator, KeyframeAnimator, matched geometry or navigation zoom, SF Symbol effects, and custom Animation types.

SkillScore95Maintained

Automatic

Frontend / UI pack

Last verified 8/14/2026

What it changes

Passed 21 of 22 test cases with the skill, and 16 of 22 without it.

Without skill73%

With skill95%

Checks it passed that the model alone missed

Applies symbolVariableValueMode modifier to the symbol view.
Uses PhaseAnimator to sequence the multi-step animation phases.
Uses FetchDescriptor to execute queries against the ModelContext.

and 4 more in the full report

5 fixed16 passed either way1 still failing0 broke

Pass-rate lift: +23 pp
Tokens: +125%
Agent turns: 0%
Response time: -34%

Model gemini-3.6-flashMeasured 8/14/2026v121 of 22 cases passed with skill

Tokens, turns and time describe resource use, not a dollar price.

Use this skill

Save it into your project's skills folder. Claude Code picks it up in its next session.

curl -fsSL --create-dirs -o .claude/skills/dpearson2699-swiftui-animation/SKILL.md https://app.decimal.ai/s/dpearson2699-swiftui-animation/SKILL.md

Want it pinned and updatable? pip install "decimalai>=0.15", then decimalai skills add dpearson2699-swiftui-animation, and start Claude Code with claude --plugin-dir "$(git rev-parse --show-toplevel)/.agents"

1 · One-time — install the CLI (docs ↗)

pip install "decimalai>=0.15"

2 · Get the skill — writes .agents/skills/dpearson2699-swiftui-animation/ and pins it in .decimal/skills.lock

decimalai skills add dpearson2699-swiftui-animation

No CLI? Get the same file — curl · raw file

curl -fsSL --create-dirs -o .claude/skills/dpearson2699-swiftui-animation/SKILL.md https://app.decimal.ai/s/dpearson2699-swiftui-animation/SKILL.md

Raw file: /s/dpearson2699-swiftui-animation/SKILL.md ↗ · machine-readable summary at /s/dpearson2699-swiftui-animation.json ↗

Safety checks: 3 of 3 passed

Code scan CleanIntent PassedContent Clean

See it in action

One of 5 test cases the skill fixed. Same model, same prompt, with and without the skill.

1 of 5

Prompt

In an iOS application targeting iOS 26+, I have a Wi-Fi SF Symbol that represents signal strength using variableValue. I want to specify how the variable value is rendered (draw mode vs color mode). Which SwiftUI modifier should I apply?

What was checked, without and with the skill
Checked	Without skill	With skill
Applies symbolVariableValueMode modifier to the symbol view.	Missed	Passed

case-21 · gemini-3.6-flash · 8/14/2026 · answers are capped and redacted

What's inside

The instructions your model reads when the skill loads.

SKILL.md448 lines3 files

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.

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
Core Animation bridge	`CALayer`, `CAAnimation`, `CADisplayLink`	Read `references/core-animation-bridge.md` before advising

Track record

Benchmark

21 / 22

test cases passed, vs 16 / 22 without

Adoption

Users: 0
Times used: 0

Safety and source details

SkillSafety

✓ 3 of 3 passed

Code scan15 of 15 checks clean

0 critical · 0 warning · 0 info — scanner v4 — 8/3/2026

View 15 scanner checks

live_secretremote_code_executionreverse_shelldata_exfiltrationssrf_metadataagent_snoopinganti_refusaldestructive_commandsobfuscated_unicodeunicode_homoglyphopaque_blobsuspicious_urltool_overreachtrigger_abuseprompt_injection_phrasing

IntentSafe

LLM judge · does the skill do what it claims

ContentClean

LLM judge · policy & harmful-content review

Source

Imported

dpearson2699 / swift-ios-skills

skills/swiftui-animation/SKILL.md

View on GitHub ↗

License NOASSERTIONImported 8/3/2026Version v1Bundled 2 files

Other skills for the same job

Published skills whose descriptions closely match this one, with their headline benchmark lift.

More skills from the same source and nearby in the registry, with their headline benchmark lift.

Ready to supercharge your AI agents?

See it in action

What's inside

SwiftUI Animation (iOS 26+)

Contents

Triage Workflow

Step 1: Identify the animation category

Track record

Benchmark

Adoption

SkillSafety

Source

Other skills for the same job

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