newsletter-subject-lines
✓Write newsletter subject lines for OpenEd Daily using 15 proven formulas + 10 Commandments evaluation. Generate 10+ options, select best through systematic criteria.
Installation
SKILL.md
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.
What's the one thing that makes this newsletter worth opening?
Write newsletter subject lines for OpenEd Daily using 15 proven formulas + 10 Commandments evaluation. Generate 10+ options, select best through systematic criteria. Source: cdeistopened/opened-vault.
Facts (cite-ready)
Stable fields and commands for AI/search citations.
- Install command
npx skills add https://github.com/cdeistopened/opened-vault --skill newsletter-subject-lines- Category
- ""Writing
- Verified
- ✓
- First Seen
- 2026-02-01
- Updated
- 2026-02-18
Quick answers
What is newsletter-subject-lines?
Write newsletter subject lines for OpenEd Daily using 15 proven formulas + 10 Commandments evaluation. Generate 10+ options, select best through systematic criteria. Source: cdeistopened/opened-vault.
How do I install newsletter-subject-lines?
Open your terminal or command line tool (Terminal, iTerm, Windows Terminal, etc.) Copy and run this command: npx skills add https://github.com/cdeistopened/opened-vault --skill newsletter-subject-lines Once installed, the skill will be automatically configured in your AI coding environment and ready to use in Claude Code or Cursor
Where is the source repository?
https://github.com/cdeistopened/opened-vault
Details
- Category
- ""Writing
- Source
- skills.sh
- First Seen
- 2026-02-01