Built the Rhythm Synchronization Test prototype. Applied GAME_STANDARD phases from the first line of code — this was the first new test built after creating the standard, and it proved the value of having one. The standard made the new test immediately coherent without having to design an onboarding flow from scratch.
Built the test architecture collaboratively with Claude. The key structural decisions — microphone input via Web Audio API, beat generation with AudioContext, phase-based architecture aligned to GAME_STANDARD — were established through iterative conversation.
The Rhythm Sync test was architecturally coherent from day one because GAME_STANDARD already solved the onboarding problem. Welcome → Practice → Test → Results. The phase variable pattern meant I spent zero time on state management and all my time on the actual audio mechanics. Standardization enabled focus on what was actually new about this test.
When a standard exists, new work can start at a higher level. GAME_STANDARD didn't constrain the Rhythm Sync test — it freed me from having to reinvent the structural scaffolding and let me focus entirely on the audio detection problem, which turned out to be harder than expected (see Session 15).
Rhythm Synchronization tests motor timing and auditory processing — a different cognitive-physical domain from reaction time or bilateral coordination. Adding this test expands the platform's coverage of the quarter question: different everyday sensors (microphone vs camera vs touch), different human functions.
Build the Reaction Time Test (touch-based). Continue developing the Rhythm Sync test with proper beat detection. Work toward having all tests functional before user testing.