Install
Works with every agent the skills CLI supports.
npx skills add https://github.com/rshankras/claude-code-apple-skills --skill swift-development- 01
Install
Run the command in your project. The CLI asks which agents to install for.
- 02
Describe the task
Ask your agent for something this skill covers. It loads swift-development automatically when relevant.
- 03
Review the result
The agent follows the SKILL.md steps, scripts and references bundled with the skill.
SKILL.md
The instructions your agent reads when the skill is triggered.
Swift Development
Swift language-level guidance that applies across all Apple platforms.
When This Skill Activates
Use this skill when the user:
- Asks about Swift concurrency (async/await, actors, Sendable, TaskGroup)
- Needs help with Swift 6 strict concurrency migration
- Has data race or actor isolation errors
- Asks about InlineArray, Span, or low-level memory performance
- Wants to eliminate heap allocations or replace unsafe pointers
- Asks about modern Swift patterns independent of any specific platform
- Wants complexity/size limits (SwiftLint thresholds) on agent-written code
Available Modules
concurrency-patterns/
Swift concurrency architecture and patterns.
- Swift 6.2 approachable concurrency features (incl.
nonisolated(nonsending), Apple's adoption doctrine) - Structured concurrency (async let, TaskGroup, .task modifier, task-local values)
- Actors, isolation, reentrancy, @MainActor, Sendable
- Runtime internals + profiling (cooperative pool, unsafe primitives, Swift Concurrency Instrument)
- Continuations for bridging legacy APIs
- Swift 6 strict concurrency migration guide
concurrency/
Swift 6.2 concurrency updates reference — the what-changed view (async-stays-on-caller, default MainActor inference, isolated conformances, @concurrent) with migration steps from 6.0/6.1 and top mistakes. Overlaps concurrency-patterns/swift62-concurrency.md by design: use this file when the question is "what changed in 6.2?", use concurrency-patterns when building or reviewing async code.
code-size/
Complexity and size limits for Swift code — SwiftLint threshold rules (cyclomatic complexity, function/type/file length, parameter count) with a violations-baseline adoption path so existing code never blocks. Part of the deterministic gauntlet with testing/fitness-functions and testing/coverage-ratchet.
memory/
InlineArray, Span, and the Swift performance cost model.
- InlineArray: fixed-size, stack-allocated collections with zero heap overhead
- Span family: safe, non-escapable access to contiguous memory (+ OutputRawSpan, swift-binary-parsing)
- Lifetime dependencies and non-escapable type constraints
swift-performance.md: the cost model — allocation, ARC/retain-release, exclusivity checks, dispatch, generics vs existentials, closures,~Copyableownership
How to Use
- Identify user's need from their question
- Read relevant module files from subdirectories
- Apply the guidance to their specific context
- Cross-reference with platform-specific skills (ios/, macos/) as needed
FAQ
What does the swift-development skill do?
Swift language patterns and best practices including concurrency, performance, and modern idioms. Use for Swift language-level code review or architecture guidance.
How do I install swift-development?
Run npx skills add https://github.com/rshankras/claude-code-apple-skills --skill swift-development in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/swift-development/ (personal) or .claude/skills/swift-development/ (project).
Which AI agents can use swift-development?
Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.
Is swift-development safe to install?
No partner security audit is available yet. Skills can run commands and scripts, so read the SKILL.md and any bundled files before installing.
Who maintains swift-development?
It is published by rshankras in rshankras/claude-code-apple-skills. It has 489 recorded installs.
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