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swift-charts — Claude Code skill: Swift Charts visuals

A skill that steers your coding agent through Swift Charts work on iOS 26+. Useful for bars, lines, donuts, heat maps and 3D surfaces.

Install into Claude Code · Skills CLI (Vercel) All methods and platforms ↓ 
npx skills add dpearson2699/swift-ios-skills --skill swift-charts -a claude-code
Open on GitHub

What swift-charts does

The skill covers Swift Charts end to end: composing marks inside Chart or Chart3D, configuring axes and scales with view modifiers, adding selection, scrolling, annotations and a legend. Separate sections handle vectorized plots (BarPlot, LinePlot, AreaPlot, PointPlot) and 3D ones (Chart3D, SurfacePlot).

It walks through a workflow: define data as an Identifiable struct, pick mark types, encode visual channels with .foregroundStyle(by:), .symbol(by:) and .lineStyle(by:), then set scale domains. There is also a review checklist and a list of common mistakes. Past 1000 2D points, the skill points you at vectorized plots.

Targets start at iOS 26+, so some examples (SectorMark, Chart3D) will not compile on older deployment targets. One trap worth knowing: SectorMark expects strictly positive values, so zeros and negatives have to be filtered or explained outside the pie. Longer recipes live in references/charts-patterns.md.

What it helps with

  • build a monthly revenue bar chart
  • add tap selection and an annotation to a chart point
  • render a donut with a custom inner radius
  • draw a Gantt chart from interval bars
  • plot a 3D surface from spatial data

Example prompts for the agent

  • build a monthly revenue chart with Swift Charts
  • add segment selection to this donut and annotate the picked slice
  • rewrite this chart as a vectorized LinePlot, there are over a thousand points

How to install swift-charts

1Skills CLI (Vercel)

npx skills add dpearson2699/swift-ios-skills --skill swift-charts -a claude-code

2Manually: put the files in place

~/.claude/skills/swift-charts/SKILL.md

Copy the whole skill folder; for one project use .claude/skills/swift-charts/

Step by step, with commands for each platform: How to install skills in Claude Code: five ways

Questions about swift-charts

How do I install swift-charts in Claude?

Run npx skills add dpearson2699/swift-ios-skills --skill swift-charts -a claude-code. The skill lands at ~/.claude/skills/swift-charts/SKILL.md.

What does swift-charts do?

It guides the agent through writing and reviewing Swift Charts code: marks, axes, scales, legends, selection, scrolling, annotations, vectorized and 3D plots.

Which iOS versions does the skill target?

The main target is iOS 26+. Some pieces map to earlier releases: SectorMark from iOS 17, vectorized plots from iOS 18, Chart3D from iOS 26.

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