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openspec/changes/enterprise-gaming-game-persistence/tasks.md

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+# Tasks: enterprise-gaming-game-persistence
+
+## 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/engine/game-persistence/` (`@suaveplan/game-persistence`, `0.1.0`, `sideEffects: false`)
+- [ ] `tsconfig.json`, `vitest.config.ts`
+
+## Phase 2 — Error codes & constants
+
+- [ ] `src/error-codes.ts` — `GamePersistenceError`, `SAVE.*` codes
+- [ ] `src/constants/index.ts` — `DEFAULT_MAX_SLOTS`, `DEFAULT_MAX_SIZE_BYTES`, `AUTOSAVE_SLOT`
+
+## Phase 3 — Types
+
+- [ ] `src/types/common.ts` + `common.md` — `SaveSlot`, `Migration`, `SaveManagerOptions`
+
+## Phase 4 — Migration runner
+
+- [ ] `src/core/migration-runner/migration-runner.ts` — chain validation, sequential migration, gap/cycle detection
+- [ ] Tests + docs
+
+## Phase 5 — Save manager
+
+- [ ] `src/core/save-manager/save-manager.ts` — save/load/delete/list/autosave with serialize + storage
+- [ ] OTel spans + events
+- [ ] Tests (including migration path, slot limit enforcement)
+- [ ] Docs
+
+## Phase 6 — Integration tests
+
+- [ ] `tests/integration.test.ts` — full round-trip: save → reload with migration → verify
+
+## Phase 7 — Pre-publish gate
+
+- [ ] `bunx turbo lint typecheck test --filter=@suaveplan/game-persistence` green
+- [ ] 100% coverage
+- [ ] Publish: `bun scripts/publish.ts --package @suaveplan/game-persistence`