# Tasks: enterprise-gaming-r3f-terrain

## 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-terrain/` (`@suaveplan/r3f-terrain`, `0.1.0`, `sideEffects: false`)

## Phase 2 — Error codes + types

- [ ] `src/error-codes.ts` + `src/types/common.ts` + `common.md`

## Phase 3 — Noise utility

- [ ] `src/utils/noise.ts` — simplex 2D noise, octave FBM
- [ ] Tests + docs

## Phase 4 — Height sample utility

- [ ] `src/utils/height-sample.ts` — world XZ → height value from active terrain
- [ ] Tests + docs

## Phase 5 — Chunk manager

- [ ] Camera-relative chunk loading/unloading, spatial hash for active set
- [ ] Tests + docs

## Phase 6 — LOD controller

- [ ] Distance → subdivision level mapping, hysteresis band
- [ ] Tests + docs

## Phase 7 — Terrain system

- [ ] Chunk generation with height + biome vertex color
- [ ] Tests + docs

## Phase 8 — Components

- [ ] `TerrainChunk` — single chunk mesh
- [ ] `Terrain` — top-level system with chunk manager wiring
- [ ] Tests + Storybook stories

## Phase 9 — Integration + pre-publish gate

- [ ] `tests/integration.test.ts`
- [ ] `bunx turbo lint typecheck test --filter=@suaveplan/r3f-terrain` green
- [ ] 100% coverage
- [ ] Publish: `bun scripts/publish.ts --package @suaveplan/r3f-terrain`