docs: Update TODO.md with completed Minimal Audio Tracker task

1 files changed, 1 insertions, 0 deletions

diff --git a/TODO.md b/TODO.md
index fae856b..a1389b0 100644
--- a/TODO.md
+++ b/TODO.md
@@ -31,6 +31,7 @@ This file tracks prioritized tasks with detailed attack plans.
 - [ ] **Task #8**: Implement Final Build Stripping
 
 ## Recently Completed
+- [x] **Minimal Audio Tracker**: Implemented a pattern and score-based audio tracker system. Details in `doc/TRACKER.md`.
 - [x] **WGSL Library (Task 21.1)**: Implemented ShaderComposer for modular WGSL snippet management.
 - [x] **Tight Ray Bounds (Task 21.2)**: Derived t_min and t_max from proxy hull hits via local-space ray-box intersection.
 - [x] **Math & Unit Tests**: Added rigorous matrix inversion checks and ShaderComposer verification tests.