Hardened Swift 6.0+ Development Container for AI Agents

// Sources/App/Engine.swift · Swift 6.0 Actor Concurrency
public actor Engine: Sendable {
    private var state: State = .idle

    public func dispatch<T: Sendable>(
        _ task: @Sendable () async throws -> T
    ) async throws -> T {
        self.state = .running
        defer { self.state = .idle }
        return try await task()
    }
}