# Context: upgrade-effects.ts

- Total line count: 191

## Top-Level Exports

1. **`getActiveUpgrades`** (lines ~28-51)
   - Returns all selected upgrades with full effect definitions from the skill upgrades record
   - Builds cache of upgrade definitions on first access, iterates over SKILL_EVOLUTION_PATHS

2. **`computeEffects`** (lines ~54-188)
   - Computes all active effects from selected upgrades into a ComputedEffects object
   - Applies multipliers, bonuses, and special effects from upgrades; handles DEEP_UNDERSTANDING and MANA_THRESHOLD

3. **`upgradeDefinitionsById`** (line ~15)
   - Cache Map for quick lookup of upgrade definitions by ID

4. **`buildUpgradeCache`** (lines ~18-25)
   - Initializes the upgrade definition cache from SKILL_EVOLUTION_PATHS

## Imports

- `SkillUpgradeChoice`, `SkillUpgradeEffect` from './types'
- `getUpgradesForSkillAtMilestone`, `SKILL_EVOLUTION_PATHS` from './skill-evolution'
- `ActiveUpgradeEffect`, `ComputedEffects` from './upgrade-effects.types'
- `SPECIAL_EFFECTS`, `hasSpecial` from './special-effects'
- `computeDynamicRegen`, `computeDynamicClickMana`, `computeDynamicDamage` from './dynamic-compute'

## Assessment

This file is already **191 lines** (well under 400). No refactoring needed. The exports are cleanly separated - `getActiveUpgrades` handles data gathering, `computeEffects` handles computation. The module is focused on a single concern (upgrade effects) and is not a candidate for splitting.