suaveplan/openspec/changes/enterprise-gaming-building/tasks.md

Tasks: enterprise-gaming-building

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/world/building/ (@suaveplan/building, 0.1.0, sideEffects: false)
• tsconfig.json, vitest.config.ts

Phase 2 — Error codes & constants

• src/error-codes.ts + src/constants/index.ts

Phase 3 — Types

• src/types/common.ts + common.md

Phase 4 — Piece registry

• src/core/piece-registry/piece-registry.ts — register/get/listByCategory, Zod validation
• Tests + docs

Phase 5 — Placement engine

• src/core/placement-engine/placement-engine.ts — snap socket search, collision validation, place
• Tests (snap finds nearest socket, invalid placement reasons)
• Docs

Phase 6 — Structure graph

• src/core/structure-graph/structure-graph.ts — adjacency graph, DFS flood from foundations, unstable detection
• Tests + docs

Phase 7 — Blueprint

• src/core/blueprint/blueprint.ts — capture/apply with relative offsets, serialize/deserialize
• Tests + docs

Phase 8 — Integration tests

• tests/integration.test.ts — place foundation + walls → check stable → remove foundation → unstable detection

Phase 9 — Pre-publish gate

• bunx turbo lint typecheck test --filter=@suaveplan/building green
• 100% coverage
• Publish: bun scripts/publish.ts --package @suaveplan/building