## 1. Documentation
- [x] 1.1 Update `openspec/project.md` with project context, tech stack, conventions, and domain knowledge
- [x] 1.2 Create `glass-rendering` spec covering the multi-pass pipeline and glass effects
- [x] 1.3 Create `parameter-controls` spec covering the Leva-based editor UI
- [x] 1.4 Create `background-system` spec covering background types and custom media
- [x] 1.5 Create `preset-management` spec covering export/import functionality
- [x] 1.6 Create `shape-system` spec covering SDF shapes and blob merging
- [x] 1.7 Validate all specs with `openspec validate add-initial-specs --strict`
