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openspec/changes/enterprise-gaming-r3f-number-plate/proposal.md

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+# OpenSpec Change: enterprise-gaming-r3f-number-plate
+
+- **Change ID**: enterprise-gaming-r3f-number-plate
+- **Package**: `@suaveplan/r3f-number-plate`
+- **Category**: gaming/devices
+- **Target path**: `gaming/devices/r3f-number-plate`
+- **Status**: PROPOSED
+- **Date**: 2026-04-24
+
+---
+
+## Summary
+
+Deliver `@suaveplan/r3f-number-plate` on the genesis branch from scratch at enterprise quality. The package renders procedural 3D number plates in React Three Fiber: configurable plate text, regional style presets (UK, EU, US, custom), embossed text via ShapeGeometry extrusion, retro-reflective material with environment map, dirty/worn texture overlays, and bolt meshes. A `NumberPlate` component accepts text + style props and renders directly into a R3F scene without external assets. Genesis adds 100% coverage and Storybook stories.
+
+---
+
+## Available workspace deps
+
+`@suaveplan/error`, `@suaveplan/types`, react, `@react-three/fiber`, `@react-three/drei`, three.
+
+---
+
+## Public API surface
+
+```ts
+type PlateRegion = 'uk' | 'eu' | 'us' | 'custom'
+
+interface NumberPlateProps {
+  text: string
+  region?: PlateRegion
+  width?: number
+  height?: number
+  dirty?: number       // 0–1 overlay intensity
+  worn?: number        // 0–1 wear intensity
+  showBolts?: boolean
+}
+
+function NumberPlate(props: NumberPlateProps): JSX.Element
+```
+
+---
+
+## File layout
+
+```text
+gaming/devices/r3f-number-plate/
+  package.json / tsconfig.json / vitest.config.ts
+  src/
+    index.ts / error-codes.ts
+    types/common.ts + md
+    styles/ (uk.ts, eu.ts, us.ts + md)
+    components/
+      NumberPlate/ (tsx + md + test + stories + index)
+  tests/integration.test.ts
+```