Initial Commit

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

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+# OpenSpec Change: enterprise-gaming-r3f-buildings
+
+- **Change ID**: enterprise-gaming-r3f-buildings
+- **Package**: `@suaveplan/r3f-buildings`
+- **Category**: gaming/scene
+- **Target path**: `gaming/scene/r3f-buildings`
+- **Status**: PROPOSED
+- **Date**: 2026-04-24
+- **Reference spec**: `/mnt/s/web/suaveplan/enterprise/r3f-buildings.md`
+
+---
+
+## Summary
+
+Deliver `@suaveplan/r3f-buildings` on the genesis branch from scratch at enterprise quality. The package provides instanced city-scale 3D building and road rendering for React Three Fiber. A `BuildingTileLoader` fetches building footprint + height data (GeoJSON or procedural tile); `InstancedBuildings` renders all buildings in a tile as a single draw call using `InstancedMesh` with per-instance world transform; `Roads` extrudes road segments as ribbon geometry. LOD degrades to billboard sprites at far distances. Genesis adds structured errors, OTel draw-call counter, and 100% coverage.
+
+---
+
+## Available workspace deps
+
+`@suaveplan/error`, `@suaveplan/types`, react, `@react-three/fiber`, `@react-three/drei`, three.
+
+---
+
+## Public API surface
+
+```ts
+function Buildings(props: BuildingsProps): JSX.Element
+// tiles, lodDistance, meshes
+
+function Roads(props: RoadsProps): JSX.Element
+// segments, width, material
+
+function useBuildings(): BuildingsCon```text
+
+---
+
+## File layout
+
+```text
+gaming/scene/r3f-buildings/
+  package.json / tsconfig.json / vitest.config.ts
+  src/
+    index.ts / error-codes.ts
+    types/common.ts + md
+    core/
+      tile-loader/ (ts + md + test + index)
+      instancer/ (ts + md + test + index)
+    components/
+      Buildings/ (tsx + md + test + stories + index)
+      Roads/ (tsx + md + test + stories + index)
+    hooks/use-buildings.ts + md + test
+  tests/integration.test.ts
+```

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

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+# Tasks: enterprise-gaming-r3f-buildings
+
+## 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/scene/r3f-buildings/` (`@suaveplan/r3f-buildings`, `0.1.0`, `sideEffects: false`)
+
+## Phase 2 — Types + tile loader
+
+- [ ] Tile data schema (GeoJSON footprint + height)
+- [ ] Tests + docs
+
+## Phase 3 — Instancer
+
+- [ ] InstancedMesh transform builder from tile footprints
+- [ ] Tests + docs
+
+## Phase 4 — Components + stories
+
+- [ ] `Buildings` + `Roads`
+
+## Phase 5 — Pre-publish gate
+
+- [ ] `bunx turbo lint typecheck test --filter=@suaveplan/r3f-buildings` green
+- [ ] 100% coverage
+- [ ] Publish: `bun scripts/publish.ts --package @suaveplan/r3f-buildings`