Email Write Sub-Skill

Purpose

Generate professional, high-converting email copy using proven copywriting frameworks. Produces subject line variants with scoring, responsive HTML templates with dark mode support, plain-text fallback, and preheader recommendations.

Activation

This sub-skill is invoked by the main /email skill when the user needs to compose a new email.

Workflow

1. Gather Context

First, check if email-profile.md exists in the project directory. If yes, load business type, tone preferences, and target audience from the profile.

If no profile exists or user provides new context, ask for:

Email Purpose: cold outreach, newsletter, product launch, promotional, re-engagement, welcome, feature announcement, etc.
Recipient: name, role, relationship (new lead, existing customer, subscriber, team member)
Tone: professional, friendly, casual, authoritative, empathetic, enthusiastic
Business Type: (from profile or ask) SaaS, e-commerce, service business, agency, creator, B2B, B2C
Key Message: what action should the recipient take?
Additional Context: product details, promotion details, deadline, personalization data

2. Select Copy Framework

Based on the email purpose, choose the appropriate framework from references/copy-frameworks.md:

Email Purpose	Recommended Framework	Why
Cold outreach	PAS	Empathy-driven, addresses pain points
Product launch	AIDA	Builds excitement, drives action
Newsletter	BAB or AIDA	Aspirational or engaging storytelling
Feature announcement	FAB	Clear value proposition for features
Promotional/sale	AIDA	Creates desire and urgency
Re-engagement	PAS	Identifies problem of disengagement
Welcome email	BAB	Shows transformation journey
Case study	4Ps	Proof-heavy, testimonial-driven
Review request	PAS	Empathetic ask for feedback
Appointment reminder	Direct	No framework needed

If uncertain, default to AIDA for marketing emails or PAS for relationship emails.

3. Generate Subject Lines

Create 3 subject line variants using these strategies:

Curiosity-Driven: Creates intrigue, open loop, question, teaser
Benefit-Driven: Clear value proposition, outcome, result
Urgency-Driven: Time-sensitive, scarcity, FOMO (but not spammy)

Subject Line Rules:

Optimal length: 6-10 words / 30-50 characters
Never use ALL CAPS
Maximum 1 exclamation mark per subject line
Avoid spam triggers: "FREE!!!", "Act Now", "Limited Time Only", "Guaranteed", "Cash", "No obligation"
Include personalization where possible (beyond first name: behavior, location, purchase history)
Use power words: exclusive, secret, insider, proven, breakthrough, transform, discover

Scoring Methodology (0-100):

Criteria	Weight	Scoring
Length	20	100 if 30-50 chars, -10 per 5 chars over/under
Power Words	20	+20 per power word (max 2)
Personalization	25	+25 if personalized beyond first name
Spam Triggers	-50	-50 if contains spam word
Clarity	20	100 if benefit/topic is clear
Curiosity	15	+15 if creates open loop

Minimum passing score: 70

4. Write Preheader Text

Generate preheader recommendation (30-80 characters):

Must complement (not repeat) the subject line
Include secondary value proposition or CTA preview
Avoid generic text like "View this email in your browser"

Example:

Subject: "Your personalized SEO roadmap is ready"
Preheader: "3 quick wins to boost your rankings this week"

5. Compose Email Body

Apply the chosen framework structure. Load full framework details from references/copy-frameworks.md before writing.

General Email Writing Rules:

Opening: Hook in first sentence, address recipient by name if available
Body: Use short paragraphs (2-3 sentences max), bullet points for scannability
Tone: Match requested tone from profile or user input
Personalization: Use merge tags like {{firstName}}, {{company}}, {{productName}}
CTA: One primary CTA, clear and action-oriented ("Get Your Free Audit", "Claim Your Spot", "Start Your Trial")
Social Proof: Include if available (testimonial, stat, case study result)
Signature: Professional sign-off with name, title, company

Framework-Specific Structure:

Load the full structure from references/copy-frameworks.md and apply. Each framework has:

Section breakdown (e.g., PAS: Problem → Agitate → Solve)
Transition phrases
Example templates

6. Generate HTML Version

Create a responsive, dark-mode compatible HTML email using these specifications:

HTML Template Structure:

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta name="color-scheme" content="light dark">
  <meta name="supported-color-schemes" content="light dark">
  <title>{{emailSubject}}</title>
  <style>
    /* Inline critical CSS */
    body { margin: 0; padding: 0; font-family: Arial, Helvetica, sans-serif; }
    table { border-collapse: collapse; }
    .email-container { max-width: 600px; margin: 0 auto; }
    .body-text { font-size: 16px; line-height: 1.6; color: #333333; }
    .cta-button {
      display: inline-block;
      padding: 14px 28px;
      background-color: #0066cc;
      color: #ffffff;
      text-decoration: none;
      border-radius: 4px;
      font-weight: bold;
      min-height: 44px;
      min-width: 44px;
    }

    /* Dark mode styles */
    @media (prefers-color-scheme: dark) {
      body { background-color: #1a1a1a !important; }
      .body-text { color: #e0e0e0 !important; }
      .email-container { background-color: #2a2a2a !important; }
    }

    /* Mobile responsive */
    @media only screen and (max-width: 600px) {
      .body-text { font-size: 14px !important; }
      .headline { font-size: 22px !important; }
      .cta-button { display: block !important; width: 100% !important; }
    }
  </style>
</head>
<body>
  <!-- Email content goes here -->
</body>
</html>

HTML Rules:

Use table-based layout (not CSS Grid/Flexbox for email client compatibility)
Max width: 600px
Inline critical CSS (some clients strip <style> tags)
Web-safe fonts with fallbacks: Arial, Helvetica, Georgia, Times New Roman
Minimum 14px body text, 22px headlines on mobile
CTA button: minimum 44x44px touch target, high contrast ratio (4.5:1)
Include color-scheme: light dark meta tag
Dark mode CSS using @media (prefers-color-scheme: dark)
Alt text on all images (describe content, not "image" or "photo")
Always include plain-text MIME part for accessibility

CTA Button Best Practices:

One primary CTA per email (secondary CTAs okay as text links)
Use <a> tag with role="button" for accessibility
Padding: 14px vertical, 28px horizontal minimum
Background color with 4.5:1 contrast ratio against text
Include fallback for dark mode (lighter background or inverted colors)

7. Generate Plain-Text Version

Create a plain-text fallback with:

No HTML tags
Line breaks for readability (max 70 characters per line)
CTA as full URL on separate line
Signature block with contact info

8. Output Format

Present the final email composition in this structure:

## Email Composition

**Framework**: [chosen framework name]
**Purpose**: [email purpose]
**Tone**: [tone]
**Recipient Type**: [recipient type]

---

### Subject Line Options

| # | Subject | Score | Type | Notes |
|---|---------|-------|------|-------|
| 1 | [subject line 1] | 87 | Curiosity | [why this works] |
| 2 | [subject line 2] | 82 | Benefit | [why this works] |
| 3 | [subject line 3] | 79 | Urgency | [why this works] |

**Recommended**: #1 (highest score)

**Preheader Text**: [30-80 char preheader recommendation]

---

### Email Body (Plain Text)

[Full email body using framework structure]

[Include merge tags like {{firstName}}, {{company}}]

[CTA]

[Signature]

---

### HTML Version

```html
[Complete HTML email code with inline CSS, dark mode support, responsive design]

Plain Text Version

[Plain text fallback with line breaks, CTA as full URL]

Email Metadata

Word Count: [body word count]
Reading Time: [estimated reading time]
Character Count (with spaces): [count]
CTA Count: [number of CTAs]

Next Steps

Review and edit copy
Choose subject line variant
Test HTML rendering in email client preview tool
Send as draft via MCP (if available) or copy to email platform
A/B test subject lines if sending to large list


## Quality Gates

Before delivering the email, verify:

1. **Subject line scores**: At least one variant scores 70+
2. **Preheader length**: 30-80 characters
3. **Framework alignment**: Body follows chosen framework structure
4. **CTA clarity**: Primary CTA is clear and action-oriented
5. **Mobile readability**: Paragraphs are 2-3 sentences max
6. **HTML validity**: Table-based layout, inline CSS, dark mode support
7. **Accessibility**: Alt text on images, plain-text fallback included
8. **Spam check**: No spam trigger words in subject or body
9. **Personalization**: Merge tags used where appropriate
10. **Tone match**: Email tone matches requested tone from profile

If any gate fails, revise before output.

## Error Handling

- If `references/copy-frameworks.md` is missing, warn user and use basic AIDA structure
- If `email-profile.md` is missing, prompt user for context (don't fail)
- If subject line scores are all below 70, generate new variants
- If HTML template fails validation, fall back to plain-text only and warn user

## Resources

- `references/copy-frameworks.md` - Full framework structures and examples
- `email-profile.md` - User's business context and preferences (optional)

## Example Invocation

User: "Write a cold outreach email to a SaaS founder about my SEO audit service"

Agent:
1. Loads email-profile.md (if exists)
2. Selects PAS framework (cold outreach)
3. Generates 3 subject line variants with scores
4. Writes email body following PAS structure
5. Creates HTML template with dark mode
6. Creates plain-text fallback
7. Outputs full email composition with metadata and next steps

## Notes

- This sub-skill focuses on composition only (no sending/scheduling)
- For sending emails, use `email-send` sub-skill or MCP email tools
- For A/B testing, generate multiple variants using different frameworks
- Always adapt tone and complexity to recipient type (B2B vs B2C, technical vs non-technical)

email-write