newsletter-subject-lines
Installation
SKILL.md
Newsletter Subject Lines
Write subject lines that get opens.
Core Philosophy: 80% of email performance comes from the subject line. Generate 10+ options, evaluate systematically, select best.
Key constraint: 35-50 characters ideal (mobile preview). Be clear even when truncated.
The 3-Phase Workflow
Phase 1: Identify Core Value
What's the one thing that makes this newsletter worth opening?