Axiom Concurrency

This is the nuclear option for Swift concurrency work. It covers everything from basic async/await to the gnarly Swift 6 migration stuff that breaks in production with zero warnings. The isolation inheritance diagnostic guide alone is worth it if you've ever seen a warning-free build crash with _dispatch_assert_queue_fail. Includes decision trees for error messages, a 12-pattern quick reference, and specific guidance on when to use actors versus Mutex. The conflict resolution section is honest about overlap with performance and data skills. If you're migrating to Swift 6 or debugging concurrency crashes, this saves you from Stack Overflow archaeology.

skills.sh installs: 1.3K
GitHub stars: 1.3K
last updated: Aug 21, 2026

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Install

$ npx -y skills add charleswiltgen/axiom --skill axiom-concurrency --agent claude-code

Installs into .claude/skills of the current project.

Files

Concurrency

You MUST use this skill for ANY concurrency, async/await, threading, or Swift 6 concurrency work.

Bundled tools on Claude Code: if command -v <tool> finds nothing (hooks off or --bare), use <plugin-root>/tools/<tool> in place of the bare name; <plugin-root> is two levels above this skill's Base directory for this skill: path.

Auditors are skills here. Where this router says "Launch some-auditor agent", invoke the matching Codex skill instead — same procedure, no Claude Code agent required.

Available: axiom-audit-concurrency.

The ones that shell out — builds, tests, simulators, crash symbolication — need shell access to run.