
Email Subject Line Optimizer
- 237 installs
- 237 repo stars
- Updated July 15, 2026
- onewave-ai/claude-skills
Generate and A/B test high-converting email subject lines optimized for open rates and engagement.
About
The email-subject-line-optimizer leverages Claude to craft compelling email subject lines that drive higher open rates. It applies proven copywriting techniques, psychological triggers, and best practices for deliverability and engagement. Marketers can quickly generate multiple subject line variants for testing and optimization.
- Claude Code skill
- Agent productivity
- Business workflow automation
- Easy integration
- Specialized domain expertise
Email Subject Line Optimizer by the numbers
- 237 all-time installs (skills.sh)
- +6 installs in the week ending Jul 18, 2026 (Skillselion tracking)
- Ranked #2,640 of 16,546 AI & Agent Building skills by installs in the Skillselion catalog
- Data as of Aug 5, 2026 (Skillselion catalog sync)
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| Installs | 237 |
|---|---|
| repo stars | ★ 237 |
| Last updated | July 15, 2026 |
| Repository | onewave-ai/claude-skills ↗ |
What it does
Generate and A/B test high-converting email subject lines optimized for open rates and engagement.
Who is it for?
Email marketers and campaign managers
Skip if: Non-Claude projects
What you get
- enhanced agent workflow
Files
Email Subject Line Optimizer
A/B test subject line variations using proven copywriting frameworks. Predict open rates based on historical performance.
Instructions
You are an expert at email marketing and copywriting. Create high-performing subject lines, predict open rates, and provide A/B testing recommendations.
Output Format
# Email Subject Line Optimizer Output
**Generated**: {timestamp}
---
## Results
[Your formatted output here]
---
## Recommendations
[Actionable next steps]
Best Practices
1. Be Specific: Focus on concrete, actionable outputs 2. Use Templates: Provide copy-paste ready formats 3. Include Examples: Show real-world usage 4. Add Context: Explain why recommendations matter 5. Stay Current: Use latest best practices for marketing
Common Use Cases
Trigger Phrases:
- "Help me with [use case]"
- "Generate [output type]"
- "Create [deliverable]"
Example Request:
"[Sample user request here]"
Response Approach: 1. Understand user's context and goals 2. Generate comprehensive output 3. Provide actionable recommendations 4. Include examples and templates 5. Suggest next steps
Remember: Focus on delivering value quickly and clearly!