사용자 이메일 1000개
→ 추출된 Memory 3000개
→ 질문: "중요한 거 뭐야?"

memory.importance = ImportanceTier.CRITICAL;  // 1.0

enum ImportanceTier {
  CRITICAL = 1.0,  // 필수, 놓치면 안 됨
  HIGH = 0.8,      // 중요, 주목 필요
  MEDIUM = 0.6,    // 보통, 참고용
  LOW = 0.4,       // 낮음, 무시 가능
}

최종 점수 = base_score + Σ(factor_weights)

interface ImportanceFactor {
  factor: string;    // 요소 이름
  weight: number;    // 가중치
  evidence?: string; // 근거 텍스트
}

"계약금 500만원 입금 완료"
→ contains_money (+0.3) + large_amount (+0.2)
→ 0.4 + 0.3 + 0.2 = 0.9 → HIGH

"오늘까지 결정해주세요"
→ has_deadline (+0.2) + urgent_deadline (+0.3)
→ 0.4 + 0.2 + 0.3 = 0.9 → HIGH

function calculateImportance(
  content: string,
  metadata: EmailMetadata
): { tier: ImportanceTier; factors: ImportanceFactor[] } {
  const factors: ImportanceFactor[] = [];
  let score = 0.4; // base

  // 1. 금전 체크
  const moneyMatch = content.match(/\d+만원|\$\d+|계약금|입금/);
  if (moneyMatch) {
    factors.push({
      factor: 'contains_money',
      weight: 0.3,
      evidence: moneyMatch[0],
    });
    score += 0.3;
  }

  // 2. 마감 체크
  const deadlineMatch = content.match(/까지|마감|deadline/i);
  if (deadlineMatch) {
    factors.push({
      factor: 'has_deadline',
      weight: 0.2,
      evidence: deadlineMatch[0],
    });
    score += 0.2;
  }

  // 3. 긴급 체크
  if (/오늘|내일|긴급|asap/i.test(content)) {
    factors.push({ factor: 'urgent_deadline', weight: 0.3 });
    score += 0.3;
  }

  // 4. 참여자 수
  if (metadata.recipientCount >= 3) {
    factors.push({ factor: 'multi_person', weight: 0.1 });
    score += 0.1;
  }

  // 5. 광고 감점
  if (isAdvertisement(content)) {
    factors.push({ factor: 'is_advertisement', weight: -0.2 });
    score -= 0.2;
  }

  // 점수 → 티어 변환
  const tier = scoreToTier(Math.min(1.0, Math.max(0.4, score)));

  return { tier, factors };
}

function scoreToTier(score: number): ImportanceTier {
  if (score >= 0.95) return ImportanceTier.CRITICAL;
  if (score >= 0.75) return ImportanceTier.HIGH;
  if (score >= 0.55) return ImportanceTier.MEDIUM;
  return ImportanceTier.LOW;
}

"ABC회사와의 계약이 확정되었습니다.
계약금 500만원은 금요일까지 입금 부탁드립니다."

Factors:
- contains_money: +0.3 (500만원)
- large_amount: +0.2 (100만원 이상)
- has_deadline: +0.2 (금요일까지)
- decision_made: +0.2 (확정)
- external_party: +0.15 (ABC회사)

Score: 0.4 + 0.3 + 0.2 + 0.2 + 0.2 + 0.15 = 1.45 → cap to 1.0
Tier: CRITICAL

"내일 2시에 회의실 A에서 미팅합시다."

Factors:
- meeting_scheduled: +0.1
- has_date: +0.1

Score: 0.4 + 0.1 + 0.1 = 0.6
Tier: MEDIUM

"이번 주 인기 상품 50% 할인!"

Factors:
- is_advertisement: -0.2

Score: 0.4 - 0.2 = 0.2 → min to 0.4
Tier: LOW

memory.importanceFactors = [
  { factor: 'contains_money', weight: 0.3, evidence: '500만원' },
  { factor: 'has_deadline', weight: 0.2, evidence: '금요일까지' },
];