swift-actor-persistence

swift-actor-persistence is an agent skill from the ECC collection by affaan-m, listed on skills.sh. It sets out patterns for a thread-safe data persistence layer in Swift built on actors. The approach combines an in-memory cache with file-backed storage, and the actor model serialises access to the shared state so that data races are ruled out by the compiler, without manual locks or dispatch queues. The main pattern is an actor-based repository. The skill applies when building a persistence layer in Swift 5.5 or later, when code needs safe access to shared mutable state, when a team wants to drop hand-written synchronisation, and when building offline-first apps that store data locally. Because it is a SKILL.md file of instructions, an AI coding agent loads it for those tasks and writes the repository in the same form each time. It is free and open source, and the skills.sh listing shows all three security audits passing.…