function needsReanalysis({ memory, currentHash, now }) {
  if (!memory) return { needsAi: true, reason: 'no_cache' };
  if (memory.last_context_hash !== currentHash) return { needsAi: true, reason: 'context_changed' };
  if (memory.next_review_at != null && now >= memory.next_review_at) return { needsAi: true, reason: 'review_due' };
  return { needsAi: false, reason: 'cache_valid' };
}

module.exports = { needsReanalysis };