Function getSkillUsageScore

src/utils/suggestions/skillUsageTracking.ts:44–55

(skillName: string)

 * meaning usage from 7 days ago is worth half as much as usage today.
 */
export function getSkillUsageScore(skillName: string): number {
  const config = getGlobalConfig()
  const usage = config.skillUsage?.[skillName]
  if (!usage) return 0

  // Recency decay: halve score every 7 days
  const daysSinceUse = (Date.now() - usage.lastUsedAt) / (1000 * 60 * 60 * 24)
  const recencyFactor = Math.pow(0.5, daysSinceUse / 7)

  // Minimum recency factor of 0.1 to avoid completely dropping old but heavily used skills
  return usage.usageCount * Math.max(recencyFactor, 0.1)
}