Gym.unity = the dev-test host re-based on DevSandbox (camera + DebugOverlay dev UI
+ world visuals), its SubScene repointed to GymSub. GymSub.unity = a fresh minimal
baked subscene (PlayerSpawner, AbilityDatabase with all 9 abilities incl. the 5
Sparks, NetCodePhysicsConfig, WorldCollisionConfig, ProjectileSpawner, GymRoster =
GymTag + Drowner/Grindylow roster). Open Gym.unity + Play → GymTag clean-spawn with
a per-frame Spark loadout; on-demand SpawnEnemy. Subscene GameObjects still named
*_Copy (cosmetic); visuals = the operator's future underwater-match pass.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>