Newsletter Signup Generator
When the user wants to design, optimize, or audit newsletter signup forms. Also use when the user mentions "newsletter," "email signup," "subscribe form," "email capture," "lead magnet," "newsletter form," "email opt-in," "subscribe CTA," "newsletter signup," or "email list building." For email strategy, use email-marketing.
Install
$ agentstack add skill-kostja94-marketing-skills-newsletter-signup ✓ scanned · ✓ verified, works with Claude Code, Cursor, and more.
Security review
✓ PassedNo issues found. Passed automated security review. · v0.1.0 How review works →
- ✓ Prompt-injection patterns
- ✓ Secret / credential exfiltration
- ✓ Dangerous shell & filesystem operations
- ✓ Untrusted network calls
- ✓ Known-malicious package signatures
What it can access
- ✓ Network access No
- ✓ Filesystem access No
- ✓ Shell / process execution No
- ✓ Environment & secrets No
- ✓ Dynamic code execution No
From automated source analysis of v0.1.0. “Used” means the capability is present in the source — more access means more to trust, not that it’s unsafe.
Verified badge
Passed review? Show it. Paste this badge into your README, it links to the public security report.
Links to your public security report.[](https://agentstack.voostack.com/security/report/skill-kostja94-marketing-skills-newsletter-signup) Reliability & compatibility
Declared compatibility
Compatibility is declared by the source manifest. End-to-end runtime verification is coming, see below.
We're building live execution health for every listing: tool-call success rate, median latency, uptime, and last-checked timestamps, measured, not self-reported. It isn't live yet, so we don't show numbers we can't stand behind.
How agent discovery & health will work →About
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 | ` 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
Source & license
This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.
- Author: kostja94
- Source: kostja94/marketing-skills
- License: MIT
- Homepage: https://alignify.co/skills
Install and usage instructions live in the source repository linked above.
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Versions
- v0.1.0 Imported from the upstream source.