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Swift Charts · dpearson2699 | DecimalAI

frontendby dpearson2699

Swift Charts

dpearson2699/swift-charts

Source dpearson2699/swift-ios-skills ↗License NOASSERTION

Implement, review, or improve data visualizations using Swift Charts.

SkillScore100Maintained

Automatic

Frontend / UI pack

Last verified 8/14/2026

What it changes

Passed 22 of 22 test cases with the skill, and 14 of 22 without it.

Without skill64%

With skill100%

Checks it passed that the model alone missed

Uses adaptive frame bounds rather than a fixed height frame.
Applies accessibility labels or accessibility values to chart marks.
Places KeyPath modifiers before value modifiers on vectorized plots.

and 7 more in the full report

8 fixed14 passed either way0 still failing0 broke

Pass-rate lift: +36 pp
Tokens: +152%
Agent turns: 0%
Response time: -36%

Model gemini-3.6-flashMeasured 8/14/2026v122 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-swift-charts/SKILL.md https://app.decimal.ai/s/dpearson2699-swift-charts/SKILL.md

Want it pinned and updatable? pip install "decimalai>=0.15", then decimalai skills add dpearson2699-swift-charts, 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-swift-charts/ and pins it in .decimal/skills.lock

decimalai skills add dpearson2699-swift-charts

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

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

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

Safety checks: 3 of 3 passed

Code scan CleanIntent PassedContent Clean

See it in action

One of 8 test cases the skill fixed. Same model, same prompt, with and without the skill.

1 of 8

Prompt

In my iOS 18 SwiftUI application, I am using BarPlot with a large collection of items. When I add `.opacity(0.8)` before `.foregroundStyle(\ .barColor)` on the BarPlot, Swift compilation fails. What is the cause and how should the code be ordered?

What was checked, without and with the skill
Checked	Without skill	With skill
Specifies that KeyPath-based modifiers must be applied before value-based modifiers on vectorized plots.	Missed	Passed

case-06 · 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.md482 lines2 files

Swift Charts

Build data visualizations with Swift Charts targeting iOS 26+. Compose marks inside Chart or Chart3D, configure axes and scales with view modifiers, and use vectorized plots or 3D plots when the data calls for them.

See references/charts-patterns.md for extended patterns, 3D charts, accessibility, and theming guidance.

Workflow
Chart Container
Mark Types
Axis Customization
Scale Configuration
Foreground Style and Encoding
Selection (iOS 17+)
Scrollable Charts (iOS 17+)
Annotations
Legend
Vectorized Plots (iOS 18+)
3D Charts (iOS 26+)
Common Mistakes
Review Checklist
References

Workflow

1. Build a new chart

Define data as an Identifiable struct or use id: key path.
Choose mark type(s): BarMark, LineMark, PointMark, AreaMark, RuleMark, RectangleMark, SectorMark, or SurfacePlot.
Wrap 2D marks in Chart; use Chart3D only for real spatial or surface data.
Encode visual channels: .foregroundStyle(by:), .symbol(by:), .lineStyle(by:).
Configure axes with .chartXAxis / .chartYAxis.
Set scale domains with .chartXScale(domain:) / .chartYScale(domain:).
Add selection, scrolling, or annotations as needed.
For 1000+ 2D data points, use vectorized plots (BarPlot, LinePlot, etc.).
Render representative empty, typical, dense, large-text, high-contrast, and VoiceOver states; exercise selection and scrolling when present.

Track record

Benchmark

22 / 22

test cases passed, vs 14 / 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/swift-charts/SKILL.md

View on GitHub ↗

License NOASSERTIONImported 8/3/2026Version v1Bundled 1 file

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

Swift Charts

Contents

Workflow

1. Build a new chart

Track record

Benchmark

Adoption

SkillSafety

Source

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