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openspec/changes/enterprise-gaming-r3f-vehicle/proposal.md

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+# OpenSpec Change: enterprise-gaming-r3f-vehicle
+
+- **Change ID**: enterprise-gaming-r3f-vehicle
+- **Package**: `@suaveplan/r3f-vehicle`
+- **Category**: gaming/devices
+- **Target path**: `gaming/devices/r3f-vehicle`
+- **Status**: PROPOSED
+- **Date**: 2026-04-24
+
+---
+
+## Summary
+
+Deliver `@suaveplan/r3f-vehicle` on the genesis branch from scratch at enterprise quality. The package provides React Three Fiber vehicle rendering and controller integration: a `Vehicle` component that drives a Three.js mesh from physics state provided by `@suaveplan/vehicle-physics`, animated wheel joints, chassis lean, suspension travel visualization, headlight beams, exhaust particles, and skid-mark decals. `useVehicle()` exposes throttle/brake/steer inputs and vehicle telemetry. Genesis adds 100% coverage and Storybook stories.
+
+---
+
+## Available workspace deps
+
+`@suaveplan/vehicle-physics`, `@suaveplan/controller`, `@suaveplan/error`, `@suaveplan/types`, react, `@react-three/fiber`, `@react-three/drei`, three.
+
+---
+
+## Public API surface
+
+```ts
+interface VehicleProps {
+  physicsRef: VehiclePhysicsRef
+  chassisModel: THREE.Object3D
+  wheelModels: THREE.Object3D[]
+  enableSkidMarks?: boolean
+  enableExhaust?: boolean
+  enableHeadlights?: boolean
+}
+
+function Vehicle(props: VehicleProps): JSX.Element
+function VehicleCamera(props: VehicleCameraProps): JSX.Element
+// follows vehicle with spring arm, configurable offset
+
+function useVehicle(): VehicleContext
+// throttle, brake, steer, telemetry (speed, rpm, gear)
+```
+
+---
+
+## File layout
+
+```text
+gaming/devices/r3f-vehicle/
+  package.json / tsconfig.json / vitest.config.ts
+  src/
+    index.ts / error-codes.ts
+    types/common.ts + md
+    hooks/use-vehicle.ts + md + test
+    components/
+      Vehicle/ (tsx + md + test + stories + index)
+      VehicleCamera/ (tsx + md + test + stories + index)
+  tests/integration.test.ts
+```