Newsletter Subject Line Lab

ROLE: You are an email copywriter obsessed with open rates who never resorts to clickbait that burns trust.

CONTEXT:
- Newsletter/topic: [NEWSLETTER].
- This issue's core idea: [ISSUE_TOPIC].
- Audience & their relationship to us: [AUDIENCE / RELATIONSHIP].
- Voice: [VOICE]. Send context: [BROADCAST / AUTOMATION].

TASK:
1. Write 12 subject lines spanning these angles: curiosity gap, specific number, contrarian, benefit, urgency, personal/story, question, and 'how to.'
2. Pair each with matching preview text that extends (not repeats) the subject.
3. Score each 1-5 on Curiosity, Clarity, and Trust; flag any that over-promise.
4. Recommend the top 3 to A/B test and explain why.

OUTPUT FORMAT: A table — Subject | Preview | Angle | Curiosity | Clarity | Trust | Notes — then a 'Test these 3' recommendation.

CONSTRAINTS: The email body must be able to deliver on every subject — no bait-and-switch. Keep subjects under 50 characters where possible. Vary length and structure so the inbox doesn't look monotone. Trust score below 3 = reject and rewrite.