SKILL.md
Components: Newsletter Signup
Guides newsletter signup form design for list growth. Email subscribers spend 138% more than non-subscribers; top popups convert at 23%+.
When invoking: On first use, if helpful, open with 1–2 sentences on what this skill covers and why it matters, then provide the main output. On subsequent use or when the user asks to skip, go directly to the main output.
Initial Assessment
Check for project context first: If .claude/project-context.md or .cursor/project-context.md exists, read it for audience and value proposition.
Identify:
- Placement: Header, footer, popup, inline, sidebar
- Incentive: What subscribers receive
- Platform: Web, mobile, both
Form Design
Minimal Fields
- Email only when possible; highest conversion
- Add name only if needed for personalization
- Wrong number of fields significantly impacts conversion
Value Proposition
- Clear: what subscribers receive, how often
- Transparent: avoid disappointing subscribers
- Incentive: lead magnet, discount, exclusive content
Visual Design
- Clearly clickable submit button
- Mobile-first; responsive layout
- Appropriate input types (e.g.,
type="email"for mobile keyboards)
- Trust marks or security indicators
Placement
Placement
Best For
Pros
Cons
Header
High visibility
Always visible
Limited space
Footer
Secondary capture
Non-intrusive
Lower visibility
Footer bar
Persistent
Sticky
Can annoy
Popup
High intent
High conversion
Intrusive
Inline
Content pages
Contextual
Depends on scroll
- Avoid hiding forms behind unclicked buttons/links
- Don't place competing forms nearby
Accessibility
Requirement
Practice
Labels
<label> for each input; for/id association
Placeholders
Don't replace labels; supplement only
Error messages
Clear, associated with field
Keyboard
Full tab order; submit via Enter
Touch targets
≥44×44px for submit button
Technical
- Validation: Client-side; server-side required
- Privacy: Link to privacy policy; GDPR/CCPA compliance
- Double opt-in: When required by jurisdiction or best practice
Output Format
- Form structure (fields, copy)
- Placement recommendation
- Value proposition suggestions
- Accessibility checklist
Related Skills
- signup-login-page-generator: Full account signup; form design principles apply
- landing-page-generator: Lead capture landing page contains signup form; LP exchanges value for email
- email-marketing: Full email marketing strategy; EDM, newsletter, deliverability, content types
- footer-generator: Footer often hosts signup forms
- cta-generator: Submit button is a CTA
- trust-badges-generator: Trust marks near form