Pure-Dart GBA core (packages/gba_core) plus Flutter app shell: ARM7TDMI CPU, memory/bus, DMA, timers, interrupts, PPU, HLE BIOS, cartridge saves, and a playable app with game library and gamepad. No sound yet. Includes MIT-licensed jsmolka test ROMs for the test suite; user ROMs, BIOS dumps and saves are gitignored. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>