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

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+# Tasks: enterprise-gaming-combat
+
+## 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/combat/` (`@suaveplan/combat`, `0.1.0`, `sideEffects: false`)
+- [ ] `tsconfig.json`, `vitest.config.ts`
+
+## Phase 2 — Error codes & constants
+
+- [ ] `src/error-codes.ts` + `src/constants/index.ts` — damage type list, default crit multiplier
+
+## Phase 3 — Types
+
+- [ ] `src/types/common.ts` + `common.md`
+
+## Phase 4 — Damage pipeline
+
+- [ ] `src/core/damage-pipeline/damage-pipeline.ts` — resistance → armor → shield → health, modifier chain ordering
+- [ ] Tests + docs
+
+## Phase 5 — Status effect
+
+- [ ] `src/core/status-effect/status-effect.ts` — stacking policy, tick interval, duration countdown
+- [ ] Tests + docs
+
+## Phase 6 — Combatant
+
+- [ ] `src/core/combatant/combatant.ts` — applyDamage/applyHealing/applyStatus/tick/revive, OTel
+- [ ] Tests + docs
+
+## Phase 7 — Combat manager
+
+- [ ] `src/core/combat-manager/combat-manager.ts` — register/unregister, processHit, tick all combatants, events
+- [ ] Tests + docs
+
+## Phase 8 — Integration + property tests
+
+- [ ] `tests/integration.test.ts` — full combat sequence: hit → death → revive
+- [ ] `tests/property.test.ts` — damage pipeline: true damage ignores resistances; shield absorbs before health
+
+## Phase 9 — Pre-publish gate
+
+- [ ] `bunx turbo lint typecheck test --filter=@suaveplan/combat` green
+- [ ] 100% coverage
+- [ ] Publish: `bun scripts/publish.ts --package @suaveplan/combat`