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.
npx skills add https://github.com/charleswiltgen/axiom --skill axiom-concurrency