chore: Add BUILD.md, Task 23 to TODO.md, and GPU perf define placeholder

1 files changed, 4 insertions, 0 deletions

diff --git a/TODO.md b/TODO.md
index 8b5651d..f0c16ae 100644
--- a/TODO.md
+++ b/TODO.md
@@ -24,6 +24,10 @@ This file tracks prioritized tasks with detailed attack plans.
 - [ ] **Task #5: Spectrogram Editor**: Web-based visual tool for extreme audio compression.
 - [ ] **Task #18: 3D System Enhancements**: Blender exporter and GPU-based BVH for complex scenes.
 - [ ] **Task #22: Windows Native Platform**: Replace GLFW with direct Win32 API calls for the final 64k push.
+- [ ] **Task #23: Shader Performance Analysis**: Analyze shader performance using Xcode Metal debugger on macOS.
+
+## Phase 2: Advanced Size Optimization
+- [ ] **Task #8**: Implement Final Build Stripping
 
 ## Recently Completed
 - [x] **WGSL Library (Task 21.1)**: Implemented ShaderComposer for modular WGSL snippet management.