handoff(Claude): Stabilize 3D renderer with rotating skybox and two-pass architecture

- Fixed black screen by ensuring clear operations in Pass 2 when Skybox pass is skipped.
- Resolved WebGPU validation errors by synchronizing depth-stencil state.
- Implemented rotating skybox using world-space ray unprojection (inv_view_proj).
- Improved procedural noise generation (multi-octave Value Noise).
- Restored scene integrity by correcting object indexing and removing artifacts.
- Updated documentation (TODO.md, PROJECT_CONTEXT.md).

1 files changed, 1 insertions, 0 deletions

diff --git a/PROJECT_CONTEXT.md b/PROJECT_CONTEXT.md
index cbaeb9b..af87827 100644
--- a/PROJECT_CONTEXT.md
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@@ -28,6 +28,7 @@ Style:
 ## Project Roadmap
 
 ### Recently Completed
+- **Skybox & Two-pass Rendering Stability**: Resolved "black screen" and validation errors by implementing a robust two-pass rendering architecture (Pass 1: Skybox/Clear, Pass 2: Scene Objects). Implemented a rotating skybox using world-space ray unprojection (`inv_view_proj`) and a multi-octave procedural noise generator.
 - **Task #20: Platform & Code Hygiene**: Consolidated platform-specific shims and WebGPU headers into `platform.h`. Refactored `platform_init` and `platform_poll` for better abstraction. Removed STL containers from initial hot paths (`AssetManager`, `procedural`). Full STL removal for CRT replacement is deferred to the final optimization phase.
 - **Task #26: Shader Asset Testing & Validation**: Developed comprehensive tests for `ShaderComposer` and WGSL asset loading/composition. Added a shader validation test to ensure production assets are valid.
 - **Asset Pipeline Improvement**: Created a robust `gen_spectrograms.sh` script to automate the conversion of `.wav` and `.aif` files to `.spec` format, replacing the old, fragile script. Added 13 new drum and bass samples to the project.