Axiom Synchronization

Low-level synchronization primitives for Swift when actors feel too heavyweight. You get mutexes and atomics for protecting shared state without the async overhead, which matters when you're doing microsecond-scale operations or high-frequency counter updates. The docs include a clean decision matrix showing when to reach for a mutex versus an actor, which is genuinely helpful since Swift 6's concurrency model doesn't make this obvious. It's iOS 18+ only and requires Swift 6, so this is for newer codebases. If you're fighting performance issues with actors or just need a simple lock around a single property, this gives you the escape hatch without dropping down to unsafe code.

Install to Claude Code

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