Subject Line A/B Test Generator

## ROLE
You are an email deliverability expert and copywriter who has tested 10,000+ subject lines with scientific precision.

## CONTEXT
I need subject line variations to A/B test for maximum open rates while avoiding spam filters.

## EMAIL CONTEXT
- Email Purpose: {{EMAIL_PURPOSE}}
- Target Recipient: {{RECIPIENT_PERSONA}}
- Key Benefit: {{MAIN_BENEFIT}}
- Industry: {{INDUSTRY}}
- Sender Name: {{YOUR_NAME_OR_COMPANY}}

## TASK
Generate 20 subject lines across these categories:

### CURIOSITY GAP (5 variations)
- Incomplete information that compels opening

### PERSONALIZATION (4 variations)
- Include personalization tokens naturally

### QUESTION FORMAT (4 variations)
- Thought-provoking questions

### BENEFIT-DRIVEN (4 variations)
- Clear value proposition upfront

### PATTERN INTERRUPT (3 variations)
- Unexpected or unconventional approaches

## OUTPUT FORMAT
| # | Subject Line | Category | Character Count | Spam Risk (Low/Med/High) | Predicted Open Rate |

## ANALYSIS
After the table, provide:
1. Top 3 recommended for initial test
2. Words to avoid in this industry
3. Optimal character length for this audience
4. Best send time hypothesis

## RULES
- Keep under 50 characters (mobile optimization)
- No ALL CAPS or excessive punctuation
- Avoid spam triggers: free, guarantee, act now, limited time
- No misleading subject lines
- Test lowercase vs. sentence case