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openspec/changes/enterprise-gaming-weapons/tasks.md

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+# Tasks: enterprise-gaming-weapons
+
+## 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/combat/weapons/` (`@suaveplan/weapons`, `0.1.0`, `sideEffects: false`)
+- [ ] `tsconfig.json`, `vitest.config.ts`
+
+## Phase 2 — Error codes & constants
+
+- [ ] `src/error-codes.ts` + `src/constants/index.ts` — default gravity, drag, max projectile lifetime
+
+## Phase 3 — Types
+
+- [ ] `src/types/common.ts` + `common.md`
+
+## Phase 4 — Weapon registry
+
+- [ ] `src/core/weapon-registry/weapon-registry.ts` — register/get/list, Zod validation on register
+- [ ] Tests + docs
+
+## Phase 5 — Weapon instance
+
+- [ ] `src/core/weapon-instance/weapon-instance.ts` — fire/reload/tick/attachments, rate limiting, events, OTel
+- [ ] Tests (fire rate guard, empty clip, reload timer)
+- [ ] Docs
+
+## Phase 6 — Projectile simulator
+
+- [ ] `src/core/projectile-simulator/projectile-simulator.ts` — Euler integration with drag + gravity
+- [ ] Tests (trajectory over time, expiry at max range)
+- [ ] Docs
+
+## Phase 7 — Integration tests
+
+- [ ] `tests/integration.test.ts` — fire → projectile tick → impact → damage event → combat.processHit
+
+## Phase 8 — Pre-publish gate
+
+- [ ] `bunx turbo lint typecheck test --filter=@suaveplan/weapons` green
+- [ ] 100% coverage
+- [ ] Publish: `bun scripts/publish.ts --package @suaveplan/weapons`