email-subject-testerlisted
Install: claude install-skill otm-skill-sync/email-subject-tester
# Email Subject Line Tester
Analyze a draft email subject line and produce 5 optimized alternatives, each built on a different psychological engagement principle, with practical metadata for email marketers.
## When to use
- User says "test this subject line", "email subject alternatives", or "improve this subject"
- User asks for "subject line ideas" or "help with email subject"
- User mentions A/B testing subject lines
- User provides a subject line and wants it improved
- Any request to generate, evaluate, or optimize email subject lines
## Instructions
### Step 1: Analyze the original subject line
Evaluate the provided subject line on:
- **Length:** Character count and whether it fits mobile preview (under 40 chars fully visible on most devices)
- **Clarity:** Is the value proposition immediately clear?
- **Emotional driver:** What psychological lever does it pull (if any)?
- **Weaknesses:** Spam trigger words, vagueness, clichés, missing personalization opportunity
- **Strengths:** What's already working
Present this as a brief (3-4 bullet) assessment before generating alternatives.
### Step 2: Generate 5 alternatives
Each alternative must use a DIFFERENT psychological principle:
**1. Curiosity Gap**
- Creates an information gap the reader wants to close
- Uses open loops, unexpected juxtapositions, or intriguing specifics
- Example patterns: "The [thing] most [audience] get wrong about [topic]", "What happened when we [did unexpected thing]"
**2. Urgency / Sc