suaveplan/openspec/changes/enterprise-gaming-animation-events/tasks.md

Tasks: enterprise-gaming-animation-events

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/rigs/animation-events/ (@suaveplan/animation-events, 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 — Event track

• src/core/event-track/event-track.ts — sorted events, range query, wrap-around
• Tests + docs

Phase 5 — Dispatcher

• src/core/dispatcher/dispatcher.ts — normalised time delta dispatch, loop wrap, OTel counter
• Tests + docs

Phase 6 — Foot contact detector

• src/core/foot-contact/foot-contact.ts — Y-velocity windowed average, plant position tracking
• Tests + docs

Phase 7 — Procedural modifiers

• src/modifiers/head-bob/head-bob.ts — sinusoidal bob driven by movement speed
• src/modifiers/breathing/breathing.ts — chest/spine sway at breathing rate
• src/modifiers/aim-offset/aim-offset.ts — solveLookAt additive spine rotation
• Tests + docs for all three

Phase 8 — Integration tests

• tests/integration.test.ts — track events dispatched over full animation loop, foot contact + IK plant

Phase 9 — Pre-publish gate

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