suaveplan/openspec/changes/enterprise-gaming-r3f-terrain/tasks.md

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