Avaudioengine

SessionClick’s first post-infrastructure feature: per-song ×2/×3 subdivisions for slow ballads and 6/8 grooves — click and flash at double or triple the beat without faking the tempo. The safety net earned its keep, the schema survived its first change, and a real-device test rewrote the BPM limits in ways no emulator could have.

First day of the SwiftUI port. Most of Phase 5 cleared in one sitting — because the shared KMP module already handled the business logic, only the platform-specific layers (audio engine, file storage, UI) needed iOS implementations. The workflow also shifted: Claude wrote the Swift directly instead of routing through an in-IDE AI.