Install Xcode 15+, run code in a Swift Playground and a command-line Swift file, use print() and string interpolation, and understand Swift's type safety model.

Use let and var correctly, understand all Swift value types, work with optionals using if let, guard let, and optional chaining, and convert between types safely.

Use all Swift control flow constructs, write functions with internal/external parameter labels, pass closures as arguments, use trailing closure syntax, and understand @escaping.

Create structs and classes, explain when to choose each, use computed properties and property observers, define enums with associated values, and use CaseIterable.

Define and adopt protocols, implement default implementations with protocol extensions, use Codable for JSON serialization, and compose multiple protocols on a single type.

Define Error enums, write and call throwing functions, use do/try/catch correctly, understand defer, and use Result<T, E> for async and functional error handling.

Write async functions, call them with await, run concurrent tasks with async let and TaskGroup, protect mutable shared state with actors, and understand the MainActor.

Design and implement a Task model (Codable), a TaskStore actor, CRUD operations, filter/sort with closures, JSON serialization to disk, and test the complete system.