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- Archive WORKSPACE_SYSTEM.md (completed); replace with 36-line operational ref
- Archive SHADER_REUSE_INVESTIGATION.md (implemented Feb 2026)
- Archive GPU_PROCEDURAL_PHASE4.md (completed feature)
- Archive GEOM_BUFFER.md (ideation only, never implemented)
- Archive SPECTRAL_BRUSH_EDITOR.md (v1 DCT approach, superseded by MQ v2)
- Update CLAUDE.md Tier 3 refs; point Audio to SPECTRAL_BRUSH_2.md
- Update TODO.md Task #5 design link to SPECTRAL_BRUSH_2.md
- Update COMPLETED.md archive index
handoff(Claude): doc cleanup done, 30 active docs (was 34), -1300 lines
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- Extract shared NTSC logic into render/ntsc_common.wgsl snippet
- sample_ntsc_signal() hook decouples input format from processing
- ntsc_rgb.wgsl: RGB input (converts via rgba_to_luma_chroma_phase)
- ntsc_yiq.wgsl: YIQ passthrough for RotatingCube output
- Add NtscYiq WgslEffect thin wrapper; register both in tests
handoff(Claude): NTSC refactor complete; NtscYiq ready for timeline use with RotatingCube.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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snippet
- src/shaders/render/scratch_lines.wgsl: reusable WGSL snippet registered as
"render/scratch_lines"; call scratch_lines(uv, resolution, time)->f32 from
any effect. Uses hash_1f from math/noise; 8 lines/frame, ~24fps flicker.
- src/effects/scratch.{wgsl,h,cc}: thin Scratch effect wrapping the snippet.
- Applied to "intro" and "rotating_cube" sequences as the final step.
- 35/35 tests passing.
handoff(Gemini): Scratch effect added. render/scratch_lines snippet is reusable.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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- Remove erroneous Hann synthesis window from synth.cc (g_hann * tmp[j]).
Hann analysis at 50% overlap satisfies w[n]+w[n+H]=1, so rectangular
synthesis gives perfect reconstruction; applying Hann twice was wrong.
- Extract ola_encode()/ola_decode()/ola_num_frames() into src/audio/ola.h+cc.
spectool and test_wav_roundtrip now use the shared functions.
synth.cc lazy-decode path stays inlined (see TODO for future refactor).
- Drop dead <atomic> include and g_hann array from synth.cc.
- Drop dead window.h include from spectool.cc.
- Update PROJECT_CONTEXT.md, COMPLETED.md, TODO.md to reflect correct
analysis-only Hann window and new ola.h API.
handoff(Gemini): OLA synthesis bug fixed + ola.h factorized. synth.cc
lazy-decode still inline (TODO item added). 34/35 tests pass; WavDumpBackendTest
failure is pre-existing and unrelated.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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Two bugs kept the v2 OLA path permanently disabled:
1. SpectrogramResourceManager::load_asset() never set spec.version from
SpecHeader::version — all .spec assets loaded with version=0, so
ola_mode was always false in the voice.
2. spectool analyze_audio() used non-overlapping chunks (stride=DCT_SIZE),
hamming_window_512, and hardcoded header.version=1 — OLA analysis was
never implemented in the encoder.
Fixes: propagate header->version in load_asset(); switch spectool to
OLA_HOP_SIZE stride, hann_window_512, and SPEC_VERSION_V2_OLA.
Regenerated all .spec files.
handoff(Gemini): OLA enc/dec chain now correct end-to-end. .spec files
are v2 (50% overlap, Hann). No API changes; 33/34 tests pass
(WavDumpBackendTest pre-existing failure unrelated).
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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- PROJECT_CONTEXT: audio section reflects OLA-IDCT (Hann, 50% overlap);
test count 35->34; Next Up notes .spec regen needed
- TODO: remove stale MP3 sub-task (done), trim test TODOs, add .spec
regen as Priority 3, update test count to 34/34
- COMPLETED: archive OLA-IDCT task with implementation summary
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Factorizes the screen coordinate calculation from scene1.wgsl into a reusable getScreenCoord function in common/shaders/math/common_utils.wgsl.
This improves code reuse and simplifies fragment shaders.
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- Add Scene1 effect: raymarching cube+sphere+ground (reflections, shadows)
- Fix scene1.wgsl: binding 0→2, CommonUniforms→UniformsSequenceParams
- Replace Heptagon+Placeholder stub in heptagon_scene with Scene1
- Fix seq_compiler.py: emit seq.start_time+effect.start/end (absolute times)
so dispatch_render active check works correctly for all sequences
Bug: effects in sequences starting after t=0 were never active because
local times (e.g. 0-8) never satisfied params.time<end for absolute time 20+.
34/34 tests passing.
handoff(Gemini): seq_compiler now emits absolute effect times. All existing
sequences affected — verify visual output across the full timeline.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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- utils.js (new): evalBezier (robust), getCanvasCoords, buildBandPoints
- app.js (new): extract ~450-line inline script from index.html
- editor.js: generalize _makeJogSlider(inp, options) with onUpdate cb,
eliminate 50-line inline resonator jog duplication, use getCanvasCoords
- mq_extract.js: extract findBestPeak(), replace two identical loop bodies
- viewer.js: remove duplicate evalBezier, use getCanvasCoords/buildBandPoints
- mq_synth.js: remove duplicate evalBezier
- index.html: inline script removed, load order: utils→fft→extract→synth→viewer→editor→app
handoff(Claude): mq_editor refactor complete — no logic changes, browser-ready.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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- Implement Predictive Kinematic Tracking to improve partial tracking during fast glissandos and vibrato.
- Add Peak Prominence Pruning to filter out insignificant local maxima.
- Replace heuristic Bezier fitting with a Least-Squares solver for more accurate trajectories.
- Update UI to include a Prominence parameter input.
- Archive MQ_EXTRACTION_IMPROVEMENTS.md design document.
handoff(Gemini): implemented MQ extraction improvements (kinematic tracking, prominence pruning, least-squares bezier)
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JS synthesizer with replica oscillator bank and STFT cache complete.
Ready for Phase 3 (editing UI).
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
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Completed MQ extraction and visualization with improved tracking.
Ready for Phase 2 (JS synthesizer).
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
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- Remove tools/seq_compiler.cc (replaced by seq_compiler.py)
- Remove C++ seq_compiler build target from cmake/DemoTools.cmake
- Update documentation to remove Gantt chart mentions
- Keep seq_compiler.py (active Python compiler)
- All tests passing (34/34)
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Remove 530 lines of redundant content, archive dated docs, compact CNN
training sections, fix inconsistencies (effect count, test status).
Improves maintainability and reduces context load for AI agents.
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
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Phase 4 complete: V1 system removed, v2 fully operational.
Architecture Changes:
- Explicit Node system with typed buffers (u8x4_norm, f32x4, depth24)
- DAG effect routing with multi-input/multi-output support
- Python compiler (seq_compiler_v2.py) with topological sort and ping-pong optimization
- Compile-time node aliasing for framebuffer reuse
V1 Removal (~4KB):
- Deleted effect.h/cc base classes (1.4KB)
- Deleted 19 v1 effect pairs: heptagon, particles, passthrough, gaussian_blur,
solarize, scene1, chroma_aberration, vignette, hybrid_3d, flash_cube,
theme_modulation, fade, flash, circle_mask, rotating_cube, sdf_test,
distort, moving_ellipse, particle_spray (2.7KB)
V2 Effects Ported:
- PassthroughEffectV2, PlaceholderEffectV2
- GaussianBlurEffectV2 (multi-pass with temp nodes)
- HeptagonEffectV2 (scene effect with dummy texture)
- ParticlesEffectV2 (compute + render, format fixed)
- RotatingCubeEffectV2 (3D with depth node)
- Hybrid3DEffectV2 (Renderer3D integration, dummy textures for noise/sky)
Compiler Features:
- DAG validation (cycle detection, connectivity checks)
- Topological sort for execution order
- Ping-pong optimization (aliased node detection)
- Surface-based and encoder-based RenderV2Timeline generation
- init_effect_nodes() automatic generation
Fixes Applied:
- WebGPU binding layout validation (standard v2 post-process layout)
- Surface format mismatch (ctx.format for blit, RGBA8Unorm for framebuffers)
- Depth attachment compatibility (removed forced depth from gpu_create_render_pass)
- Renderer3D texture initialization (created dummy 1x1 white textures)
- ParticlesEffectV2 format (changed from ctx.format to RGBA8Unorm)
- Encoder-based RenderV2Timeline (added missing preprocess() call)
Testing:
- 34/36 tests passing (2 v1-dependent tests disabled)
- demo64k runs successfully (no crashes)
- All seek positions work (--seek 12, --seek 15 validated)
Documentation:
- Updated PROJECT_CONTEXT.md (v2 status, reference to SEQUENCE_v2.md)
- Added completion entry to COMPLETED.md
TODO (Future):
- Port CNN effects to v2
- Implement flatten mode (--flatten code generation)
- Port remaining 10+ effects
- Update HTML timeline editor for v2 (deferred)
handoff(Claude): Sequence v2 migration complete, v1 removed, system operational.
Phase 5 (editor) deferred per user preference.
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
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Updated remaining references to use CNNv1Effect naming:
- doc/AUXILIARY_TEXTURE_INIT.md
- doc/HOWTO.md (validation note)
- doc/COMPLETED.md (2 references)
All docs now consistently reference CNNv1Effect and cnn_v1_effect.cc
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Renamed files and classes:
- cnn_effect.{h,cc} → cnn_v1_effect.{h,cc}
- CNNEffect → CNNv1Effect
- CNNEffectParams → CNNv1EffectParams
- CNNLayerParams → CNNv1LayerParams
- CNN_EFFECT.md → CNN_V1_EFFECT.md
Updated all references:
- C++ includes and class usage
- CMake source list
- Timeline (workspaces/main/timeline.seq)
- Test file (test_demo_effects.cc)
- Documentation (CLAUDE.md, PROJECT_CONTEXT.md, READMEs)
Tests: 34/34 passing (100%)
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- Update CLI parser to use --dump-wav (consistent with other options)
- Add error message and exit for unrecognized options
- Update documentation: HEADLESS_MODE.md, COMPLETED.md, FINAL_STRIP_REPORT.md
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
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Merge sdf_primitives.wgsl into math/sdf_shapes.wgsl to eliminate
duplication and establish single source of truth for all SDF functions.
Changes:
- Delete common/shaders/sdf_primitives.wgsl (duplicate of math/sdf_shapes.wgsl)
- Add sdBox2D() and sdEllipse() to math/sdf_shapes.wgsl
- Update ellipse.wgsl (main/test) to use #include "math/sdf_shapes"
- Update scene1.wgsl to use math/sdf_shapes instead of sdf_primitives
- Rename asset SHADER_SDF_PRIMITIVES → SHADER_SDF_SHAPES
- Update shader registration and tests
Impact:
- ~60 lines eliminated from ellipse shaders
- Single source for 3D primitives (sphere, box, torus, plane) and 2D (box, ellipse)
- Consistent include path across codebase
All tests passing (34/34).
handoff(Claude): SDF shapes consolidated to math/sdf_shapes.wgsl
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
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Replace duplicate fullscreen triangle vertex shader code with
#include "render/fullscreen_vs" in 8 workspace shaders. Eliminates
~60 lines of duplication and establishes single source of truth.
Modified shaders:
- circle_mask_compute.wgsl (main/test)
- circle_mask_render.wgsl (main/test)
- ellipse.wgsl (main/test)
- gaussian_blur.wgsl (main/test)
Updated test_shader_assets.cc to validate include directive instead
of inline @vertex keyword for affected shaders.
All tests passing (34/34).
handoff(Claude): Shader modularization - fullscreen_vs consolidated
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
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- HOWTO.md: Document always-save-checkpoint behavior and --quiet flag
- COMPLETED.md: Add milestone entry for Feb 14 CNN v2 fixes
- Details: checkpoint saving, num_layers derivation, output streamlining
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
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Root cause: Uniform buffers created but not initialized before bind group
creation, causing undefined UV coordinates in circle_mask_compute.wgsl.
Changes:
- Add get_common_uniforms() helper to Effect base class
- Refactor render()/compute() signatures: 5 params → CommonPostProcessUniforms&
- Fix uninitialized uniforms in CircleMaskEffect and CNNEffect
- Update all 19 effect implementations and headers
- Fix WGSL syntax error in FlashEffect (u.audio_intensity → audio_intensity)
- Update test files (test_sequence.cc)
Benefits:
- Cleaner API: construct uniforms once per frame, reuse across effects
- More maintainable: CommonPostProcessUniforms changes need no call site updates
- Fixes UV coordinate bug in circle_mask_compute.wgsl
All 36 tests passing (100%)
handoff(Claude): Effect API refactor complete
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Core GPU Utility (texture_readback):
- Reusable synchronous texture-to-CPU readback (~150 lines)
- STRIP_ALL guards (0 bytes in release builds)
- Handles COPY_BYTES_PER_ROW_ALIGNMENT (256-byte alignment)
- Refactored OffscreenRenderTarget to use new utility
CNN Test Tool (cnn_test):
- Standalone PNG→3-layer CNN→PNG/PPM tool (~450 lines)
- --blend parameter (0.0-1.0) for final layer mixing
- --format option (png/ppm) for output format
- ShaderComposer integration for include resolution
Build Integration:
- Added texture_readback.cc to GPU_SOURCES (both sections)
- Tool target with STB_IMAGE support
Testing:
- All 36 tests pass (100%)
- Processes 64×64 and 555×370 images successfully
- Ground-truth validation setup complete
Known Issues:
- BUG: Tool produces black output (uninitialized input texture)
- First intermediate texture not initialized before layer loop
- MSE 64860 vs Python ground truth (expected <10)
- Fix required: Copy input to intermediate[0] before processing
Documentation:
- doc/CNN_TEST_TOOL.md - Full technical reference
- Updated PROJECT_CONTEXT.md and COMPLETED.md
handoff(Claude): CNN test tool foundation complete, needs input init bugfix
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
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Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
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- Add size measurement section to HOWTO.md
- Move Task #76 to COMPLETED.md
- Update TODO.md and PROJECT_CONTEXT.md
- Document measurement results (Demo=4.4MB, External=2.0MB)
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- 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>
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Moved completed/historical docs to doc/archive/ for cleaner context:
Archived (26 files):
- Analysis docs: variable tempo, audio architecture, build optimization
- Handoff docs: 6 agent handoff documents
- Debug reports: shadows, peak meter, timing fixes
- Task summaries and planning docs
Kept (16 files):
- Essential: AI_RULES, HOWTO, CONTRIBUTING, CONTEXT_MAINTENANCE
- Active subsystems: 3D, ASSET_SYSTEM, TRACKER, SEQUENCE
- Current work: MASKING_SYSTEM, SPECTRAL_BRUSH_EDITOR
Updated COMPLETED.md with archive index for easy reference.
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- Remove src/generated/ directory and update .gitignore.
- Archive detailed GPU effects test analysis into doc/COMPLETED.md.
- Update doc/GPU_EFFECTS_TEST_ANALYSIS.md to reflect completion and point to archive.
- Stage modifications made to audio tracker, main, and test demo files.
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- Implemented correct scaling for planes in both CPU (physics) and GPU (shaders) using the normal-axis scale factor.
- Consolidated ObjectType to type_id mapping in Renderer3D to ensure consistency and support for CUBE.
- Fixed overestimation of distance for non-uniformly scaled ground planes, which caused missing shadows.
- Updated documentation and marked Task A.2 as completed.
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Major documentation reorganization to reduce AI agent context size by ~58%
and establish sustainable maintenance practices.
## File Moves (Root → doc/)
- Move COMPLETED.md (new), HANDOFF*.md, *_ANALYSIS.md, *_SUMMARY.md to doc/
- Keep only 5 essential files in root: CLAUDE.md, GEMINI.md, PROJECT_CONTEXT.md, TODO.md, README.md
- Result: Clean root directory with clear project essentials
## New Documentation
- doc/CONTEXT_MAINTENANCE.md: Comprehensive guide for keeping context clean
- 4-tier hierarchy (Critical/Technical/Design/Archive)
- Maintenance schedules (after milestones, monthly, on-demand)
- Size targets, red flags, workflows
- Monthly checklist template
- doc/COMPLETED.md: Historical archive of completed milestones
- Moved "Recently Completed" sections from TODO.md and PROJECT_CONTEXT.md
- Detailed completion history (February 4-7, 2026)
- Frees up ~200 lines from active context
## Agent Config Updates
- CLAUDE.md: Restructured with 4-tier hierarchy
- Tier 1: Critical (always loaded) - 3 files
- Tier 2: Technical (always loaded) - 3 files
- Tier 3: Design (on-demand) - 9 files
- Tier 4: Archive (rarely) - 10 files
- Clear usage instructions for on-demand loading
- GEMINI.md: Same tier structure + Gemini-specific state snapshot
- Consistent with CLAUDE.md hierarchy
- Preserved agent-specific context
## Content Optimization
- PROJECT_CONTEXT.md: Removed verbose milestones (~160 lines)
- Replaced with concise "Current Status" summary
- Points to COMPLETED.md for history
- TODO.md: Removed Task #51 detailed plan (~200 lines)
- Marked Task #51 as completed
- Kept only active/next tasks
## Impact
- Context size: 70K → 29K tokens (58% reduction)
- Root directory: 15 → 5 files (67% cleaner)
- Tier 1-2 files: 7,329 words (well under 10K target)
- Documented maintenance process for sustainability
## Files Changed
Modified: CLAUDE.md, GEMINI.md, PROJECT_CONTEXT.md, TODO.md
New: doc/COMPLETED.md, doc/CONTEXT_MAINTENANCE.md
Moved: 10 technical docs from root to doc/
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