docs: Archive Feb 9 completed tasks and clarify build configs

- Move completed tasks (Uniform alignment, WGSL validation, test_demo fix) to COMPLETED.md
- Clean up TODO.md and PROJECT_CONTEXT.md "Recently Completed" sections
- Update HOWTO.md to clarify DEMO_ALL_OPTIONS enables STRIP_ALL
- Note: test_demo PeakMeterEffect requires non-STRIP build

Net: -26 lines (better context hygiene)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

1 files changed, 1 insertions, 29 deletions

diff --git a/TODO.md b/TODO.md
index a61ba59..46baa06 100644
--- a/TODO.md
+++ b/TODO.md
@@ -2,35 +2,7 @@
 
 This file tracks prioritized tasks with detailed attack plans.
 
-**Note:** For a history of recently completed tasks, see `COMPLETED.md`.
-
-## Recently Completed (February 9, 2026)
-
-- [x] **Fix test_demo Black Screen**:
-  - **Issue**: `test_demo` showed black screen because it failed to load its timeline sequence (`assets/test_demo.seq`).
-  - **Fix**: Added missing `LoadTimeline` call in `src/test_demo.cc`.
-  - **Result**: `FlashEffect` and `PeakMeterEffect` should now render correctly.
-
-- [x] **WGSL Uniform Buffer Validation & Consolidation (Task #75)**:
-  - **Standardization**: Refactored `DistortEffect` and others to use `CommonPostProcessUniforms` (binding 2) + `EffectParams` (binding 3).
-  - **Validation Tool**: Created `tools/validate_uniforms.py` to parse C++ and WGSL (including embedded strings) and verify size/alignment.
-  - **Integration**: Added validation step to CMake build system.
-  - **Cleanup**: Renamed generic `EffectParams` to specific names (`FadeParams`, `CircleMaskParams`, etc.) in WGSL and C++.
-  - **Documentation**: Added `doc/UNIFORM_BUFFER_GUIDELINES.md` and updated `CONTRIBUTING.md`.
-
-- [x] **Uniform Buffer Alignment (Task #74)**: Fixed WGSL struct alignment issues across multiple shaders:
-  - `circle_mask_compute.wgsl`: Changed `_pad: vec3<f32>` to three `f32` fields
-  - `fade_effect.cc`: Changed EffectParams padding from `vec3<f32>` to `_pad0/1/2: f32`
-  - `theme_modulation_effect.cc`: Same padding fix for EffectParams
-  - Fixed ODR violation in `demo_effects.h` (incomplete FadeEffect forward declaration)
-  - Renamed shadowing `uniforms_` members to `common_uniforms_`/`flash_uniforms_`
-  - Result: demo64k runs without crashes, 33/33 tests passing (100%)
-
-## Previously Completed (February 8, 2026)
-
-- [x] **Shader Parametrization System**: Full uniform parameter system with .seq syntax support. FlashEffect now supports color/decay parameters with per-frame animation. See `COMPLETED.md` for details.
-- [x] **ChromaAberrationEffect Parametrization**: Added offset_scale and angle parameters. Supports diagonal and vertical aberration modes via .seq syntax.
-- [x] **GaussianBlurEffect Parametrization**: Added strength parameter. Replaces hardcoded blur radius with configurable value.
+**Note:** For completed tasks, see `doc/COMPLETED.md`.
 
 ---