suaveplan/openspec/changes/enterprise-gaming-weather/tasks.md

Tasks: enterprise-gaming-weather

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/world/weather/ (@suaveplan/weather, 0.1.0, sideEffects: false)
• tsconfig.json, vitest.config.ts

Phase 2 — Error codes & constants

• src/error-codes.ts + src/constants/index.ts
• src/presets/index.ts — CLEAR, RAIN, STORM, SNOW, FOG presets

Phase 3 — Types

• src/types/common.ts + common.md

Phase 4 — Blend utility

• src/utils/blend.ts — blendWeather linear interpolation of all fields
• Tests + docs

Phase 5 — Weather zone

• src/core/weather-zone/weather-zone.ts — radius + blend edge, getBlendFactor
• Tests + docs

Phase 6 — Weather system

• src/core/weather-system/weather-system.ts — state machine, transitionTo/tick, lightning RNG, events, OTel
• Tests (transition progress, lightning fires event, zone blend)
• Docs

Phase 7 — Integration tests

• tests/integration.test.ts — preset sequence: CLEAR → RAIN → STORM → tick through transitions

Phase 8 — Pre-publish gate

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