How do I install the Swift API Design Guidelines Claude Code skill?

Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/swift-api-design-guidelines/SKILL.md and restart Claude Code. Both flows are detailed at https://claudskills.com/install/.

Is this skill free to install?

Yes. ClaudSkills is an open registry — every skill keeps its source repository's license, and manual install via copy is free. ClaudSkills Pro ($9/mo, $79/yr, or $149 one-time) adds one-click install via the desktop app and a multi-signal Quality Score.

ClaudSkills / Engineering / backend

Swift API Design Guidelines

Category: Engineering · Sub-category: backend · Last updated: 2026-05-08

lang:swift

Apply Swift API Design Guidelines to name, label, and document Swift APIs. Covers argument label rules (prepositional phrase rule, grammatical phrase rule, first-label omission), mutating/nonmutating pair naming (-ed/-ing participle pattern, form- prefix, sort/sorted, formUnion/union), side-effect naming (noun for pure, verb for mutating), documentation comment structure (summary by declaration kind, O(1) complexity rule), clarity at call site, role-based naming, protocol naming (-able/-ible/-ing), default arguments over method families, casing conventions, and terminology. Use when designing new Swift APIs, reviewing naming and argument labels, writing documentation comments, or refactoring for call site clarity.

From the source SKILL.md

Apply the Swift API Design Guidelines when naming types, methods, properties, parameters, and argument labels. Targets Swift 6.3. For language features and syntax, see swift-language. For concurrency patterns, see swift-concurrency.

What this skill does

Swift API Design Guidelines is a community-contributed Claude Code skill in the backend sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/swift-api-design-guidelines/ and loads when your prompt matches the skill's trigger.

When to invoke it: Use when designing new Swift APIs, reviewing naming and argument labels, writing documentation comments, or refactoring for call site clarity.

Who uses this skill

The Swift API Design Guidelines skill is built for software engineers, backend developers, full-stack teams, and technical leads building and maintaining production systems. It is part of the open ClaudSkills registry, a community-curated catalog of 56,000+ capabilities you can install for Claude Code — the Claude CLI agent.

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/swift-api-design-guidelines
curl -L https://claudskills.com/skills/swift-api-design-guidelines/SKILL.md \
  -o ~/.claude/skills/swift-api-design-guidelines/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/swift-api-design-guidelines/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/swift-api-design-guidelines/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\swift-api-design-guidelines\SKILL.md on Windows. See the full install guide for step-by-step instructions.

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

Pro

For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.

See pricing → Download desktop app

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