Install
Works with every agent the skills CLI supports.
npx skills add https://github.com/steipete/agent-scripts --skill swift-concurrency-expert- 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-concurrency-expert 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 Concurrency Expert
Attribution: copied from @Dimillian’s Dimillian/Skills (2025-12-31).
Overview
Review and fix Swift Concurrency issues in Swift 6.2+ codebases by applying actor isolation, Sendable safety, and modern concurrency patterns with minimal behavior changes.
Workflow
1. Triage the issue
- Capture the exact compiler diagnostics and the offending symbol(s).
- Identify the current actor context (
@MainActor,actor,nonisolated) and whether a default actor isolation mode is enabled. - Confirm whether the code is UI-bound or intended to run off the main actor.
2. Apply the smallest safe fix
Prefer edits that preserve existing behavior while satisfying data-race safety.
Common fixes:
- UI-bound types: annotate the type or relevant members with
@MainActor. - Protocol conformance on main actor types: make the conformance isolated (e.g.,
extension Foo: @MainActor SomeProtocol). - Global/static state: protect with
@MainActoror move into an actor. - Background work: move expensive work into a
@concurrentasync function on anonisolatedtype or use anactorto guard mutable state. - Sendable errors: prefer immutable/value types; add
Sendableconformance only when correct; avoid@unchecked Sendableunless you can prove thread safety.
Reference material
- See
references/swift-6-2-concurrency.mdfor Swift 6.2 changes, patterns, and examples. - See
references/swiftui-concurrency-tour-wwdc.mdfor SwiftUI-specific concurrency guidance.
FAQ
What does the swift-concurrency-expert skill do?
Swift concurrency review/fix: compiler errors, Sendable, isolation, remediation.
How do I install swift-concurrency-expert?
Run npx skills add https://github.com/steipete/agent-scripts --skill swift-concurrency-expert 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-concurrency-expert/ (personal) or .claude/skills/swift-concurrency-expert/ (project).
Which AI agents can use swift-concurrency-expert?
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-concurrency-expert 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-concurrency-expert?
It is published by steipete in steipete/agent-scripts. It has 165 recorded installs.
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