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

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+# OpenSpec Change: enterprise-gaming-r3f-emulator
+
+- **Change ID**: enterprise-gaming-r3f-emulator
+- **Package**: `@suaveplan/r3f-emulator`
+- **Category**: gaming/devices
+- **Target path**: `gaming/devices/r3f-emulator`
+- **Status**: PROPOSED
+- **Date**: 2026-04-24
+
+---
+
+## Summary
+
+Deliver `@suaveplan/r3f-emulator` on the genesis branch from scratch at enterprise quality. The package renders 3D device emulation interfaces in React Three Fiber: handheld console shell (GameBoy-style and modern pad presets), on-screen virtual display texture (`useRenderTarget`), button press animations, thumbstick deflection, d-pad tilt, screen glare/smudge material, and a `useEmulator` hook that pipes `@suaveplan/controller` input events into the 3D mesh state. Enables in-game retro-game-within-a-game and tutorial device overlays. Genesis adds 100% coverage and Storybook stories.
+
+---
+
+## Available workspace deps
+
+`@suaveplan/controller`, `@suaveplan/error`, `@suaveplan/types`, react, `@react-three/fiber`, `@react-three/drei`, three.
+
+---
+
+## Public API surface
+
+```ts
+type DevicePreset = 'handheld-retro' | 'handheld-modern' | 'custom'
+
+interface EmulatorProps {
+  preset?: DevicePreset
+  screenTexture?: THREE.Texture
+  inputRef?: ControllerRef
+  scale?: number
+}
+
+function Emulator(props: EmulatorProps): JSX.Element
+
+function useEmulator(): EmulatorContext
+// pressButton, releaseButton, setStick, screenTexture
+```
+
+---
+
+## File layout
+
+```text
+gaming/devices/r3f-emulator/
+  package.json / tsconfig.json / vitest.config.ts
+  src/
+    index.ts / error-codes.ts
+    types/common.ts + md
+    presets/ (handheld-retro.ts, handheld-modern.ts + md)
+    hooks/use-emulator.ts + md + test
+    components/
+      Emulator/ (tsx + md + test + stories + index)
+  tests/integration.test.ts
+```

openspec/changes/enterprise-gaming-r3f-emulator/tasks.md

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+# Tasks: enterprise-gaming-r3f-emulator
+
+## 0. Pre-flight (non-negotiable)
+
+- [ ] 0.1 Confirm clean working tree (`git status` reports nothing) and no in-flight worktrees with uncommitted work (`git worktree list` then `git status` in each)
+- [ ] 0.2 If any worktrees exist under `.claude/worktrees/`, account for each one: still-active agent, work-pending-merge, or stale-and-prune. Stale worktrees MUST be removed (`git worktree remove`) before opening a new one — code that has been lost twice on main is the failure mode this guards against.
+- [ ] 0.3 Confirm the package set in `MANIFEST.md` matches `find packages -maxdepth 3 -name package.json` count. Drift here means a prior change archived without regenerating the manifest.
+
+## Phase 1 — Scaffold
+
+- [ ] Create `gaming/devices/r3f-emulator/` (`@suaveplan/r3f-emulator`, `0.1.0`, `sideEffects: false`)
+
+## Phase 2 — Types + error codes
+
+- [ ] `src/types/common.ts` + `common.md`
+- [ ] `src/error-codes.ts`
+
+## Phase 3 — Device presets
+
+- [ ] `src/presets/handheld-retro.ts`, `handheld-modern.ts` — geometry + material specs
+- [ ] Docs
+
+## Phase 4 — Hook
+
+- [ ] `src/hooks/use-emulator.ts` — pressButton, releaseButton, setStick, screenTexture
+- [ ] Tests + docs
+
+## Phase 5 — Component
+
+- [ ] `Emulator` — shell mesh, button animations, thumbstick deflection, d-pad tilt, screen glare/smudge
+- [ ] Tests + Storybook stories
+
+## Phase 6 — Integration tests
+
+- [ ] `tests/integration.test.ts` — input → mesh state, preset switching
+
+## Phase 7 — Pre-publish gate
+
+- [ ] `bunx turbo lint typecheck test --filter=@suaveplan/r3f-emulator` green
+- [ ] 100% coverage
+- [ ] Publish: `bun scripts/publish.ts --package @suaveplan/r3f-emulator`