docs: Streamline top-level documentation

Condense README, PROJECT_CONTEXT, and TODO:
- README: Remove verbose file listings, focus on quickstart
- PROJECT_CONTEXT: Condense status, remove recent completions
- TODO: Mark Task #77 complete, remove verbose details
- WORKSPACE_SYSTEM: Mark as completed

Details moved to individual doc/ files.
Net: -76 lines

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

1 files changed, 19 insertions, 61 deletions

diff --git a/PROJECT_CONTEXT.md b/PROJECT_CONTEXT.md
index ae79bbf..ff6bc48 100644
--- a/PROJECT_CONTEXT.md
+++ b/PROJECT_CONTEXT.md
@@ -31,75 +31,33 @@
 
 ## Current Status
 
-- Audio system: Sample-accurate synchronization. Hardware playback time as master clock. Variable tempo support. Pipeline optimized (Task #72): Zero heap allocations per frame, direct ring buffer writes. Comprehensive test coverage.
-- Build system: Optimized with proper asset dependency tracking
-- Shader system: Parameterization complete (UniformHelper, .seq syntax). Modular with compilation tests. WGSL composability improved (`math/common_utils.wgsl`).
-- 3D rendering: Hybrid SDF/rasterization with BVH acceleration and binary scene loader. Object data loading pipeline enhanced.
-- Asset pipeline: Blender export script and binary scene ingestion
-- Error handling: Dual macro system (`FATAL_XXX` for programming errors, `CHECK_RETURN` for recoverable errors)
-- Testing: **36/36 tests passing (100%)** - All tests operational
+- **Workspace system:** Multi-workspace support. Easy switching with `-DDEMO_WORKSPACE=<name>`. Shared common assets.
+- **Audio:** Sample-accurate sync. Zero heap allocations per frame. Variable tempo. Comprehensive tests.
+- **Shaders:** Parameterized effects (UniformHelper, .seq syntax). Modular WGSL composition.
+- **3D:** Hybrid SDF/rasterization with BVH. Binary scene loader. Blender pipeline.
+- **Build:** Asset dependency tracking. Size measurement. Hot-reload (debug-only).
+- **Testing:** **36/36 passing (100%)**
 
 ---
 
 ## Next Up
 
-**Active:**
-- Task #5: Spectral Brush Editor [IN PROGRESS] - Procedural spectrogram tool (50-100× compression)
-
-**Visuals:**
-- Task #52: Procedural SDF Font
-- Task #53: Particles Shader Polish
-- Task #55: SDF Random Planes Intersection
-
-**Structure:**
-- Task #77: Workspace System - Self-contained demo workspaces
-
-**Tooling:**
-- Task #54: Tracy Integration
-- Task #76: External Library Size Measurement
-
-**Details:** See `TODO.md` and individual design docs
-
----
-
-## Design Docs Reference
-
-**Core Systems:**
-- `doc/ASSET_SYSTEM.md` - Build-time asset packer, 16-byte alignment
-- `doc/SEQUENCE.md` - .seq timeline format with BPM notation
-- `doc/TRACKER.md` - Audio pattern system, unit-less timing
-- `doc/3D.md` - Hybrid SDF raymarching with BVH acceleration
-
-**Formats:**
-- `doc/SCENE_FORMAT.md` - Binary scene format (SCN1)
-- `doc/MASKING_SYSTEM.md` - Auxiliary texture registry
-
-**Tools & Workflow:**
-- `doc/BUILD.md` - Multi-platform builds (Debug/STRIP_ALL/FINAL_STRIP)
-- `doc/SPECTRAL_BRUSH_EDITOR.md` - Procedural spectrogram tool
-- `doc/WORKSPACE_SYSTEM.md` - Multi-demo organization
-- `doc/HOT_RELOAD.md` - Debug-only file change detection
-- `doc/SIZE_MEASUREMENT.md` - External library size measurement
-- `doc/test_demo_README.md` - 16s audio/visual sync test
-
-**Meta:**
-- `doc/CONTEXT_MAINTENANCE.md` - Context hygiene protocol
+See `TODO.md` for current priorities and active tasks.
 
 ---
 
-## Recently Completed
+## Documentation
 
-**Feb 9, 2026:**
-- Size measurement system (Task #76) - Demo: 4.4MB, External: 2.0MB
-- Hot-reload file watcher (debug-only, 0 bytes overhead)
-- WGSL uniform buffer validation (Task #75)
-- Uniform buffer alignment fixes (Task #74)
-
-**Feb 8, 2026:**
-- Shader parametrization system (Task #73)
-
----
+**Essential:**
+- `doc/ARCHITECTURE.md` - System architecture and design decisions
+- `doc/HOWTO.md` - Common operations and workflows
+- `doc/CONTRIBUTING.md` - Development protocols
 
-For detailed architecture, see `doc/ARCHITECTURE.md`.
+**Technical Reference:**
+- Core: `ASSET_SYSTEM.md`, `SEQUENCE.md`, `TRACKER.md`, `3D.md`
+- Formats: `SCENE_FORMAT.md`, `MASKING_SYSTEM.md`
+- Tools: `BUILD.md`, `WORKSPACE_SYSTEM.md`, `SIZE_MEASUREMENT.md`
 
-For completed tasks history, see `doc/COMPLETED.md` and git history.
+**History:**
+- `doc/COMPLETED.md` - Completed tasks archive
+- Git log for detailed change history