suaveplan/openspec/changes/enterprise-gaming-game-loop/tasks.md

Tasks: enterprise-gaming-game-loop

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-loop/ with package.json (@suaveplan/game-loop, 0.1.0, sideEffects: false)
• tsconfig.json, vitest.config.ts

Phase 2 — Error codes & constants

• src/error-codes.ts — GameLoopError, GAME_LOOP.* codes
• src/constants/index.ts — DEFAULT_FIXED_STEP, DEFAULT_MAX_FRAME_TIME

Phase 3 — Types

• src/types/common.ts — all public interfaces
• src/types/common.md

Phase 4 — Frame stats utility

• src/utils/frame-stats.ts — rolling FPS average, frame-time smoothing
• Tests + docs

Phase 5 — Game loop core

• src/core/game-loop/game-loop.ts — accumulator pattern, onTick/onRender callbacks, panic detection, OTel
• AbortSignal wiring for clean exit
• Tests using FakeClock (advance time manually, assert tick count)
• Docs

Phase 6 — Tick scheduler

• src/core/tick-scheduler/tick-scheduler.ts — scheduleOnce, scheduleEvery, cancel
• Tests + docs

Phase 7 — Integration tests

• tests/integration.test.ts — start/stop loop, scheduler interaction, panic scenario

Phase 8 — Pre-publish gate

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