Cleaning up stale feature flags This skill guides you through finding feature flags that are no longer serving a purpose and safely removing them. When to use this skill - The user asks to clean up, audit, or review their feature flags - The user wants to find flags that are stale, unused, or fully rolled out - The user asks "which feature flags can I remove?" or similar - The user wants to reduce tech debt from old feature flags What makes a flag stale A feature flag is considered stale when it's no longer doing useful work. PostHog tracks this with two signals: 1. Usage-based staleness : Th…