Marketing Skill

Newsletter Forge

Write a newsletter from one topic: subject lines, preview text, structure and call-to-action — benefit-driven, not ad fluff.

NewsletterEmail marketingEmailSubject linePreheaderPreview textCTACall-to-ActionCopywritingAIDAPASConversionA/B testDeliverabilityGDPRMarketingCampaignWelcome seriesRe-EngagementProduct announcementDigestBenefit-drivenBrand voiceTopic ideasAngleContent-PillarsSegmentationOnboardingStorytelling
Free
0 0 v1.3.0 Updated 22.06.2026 by skills-for-ai

SKILL.md in the open agentskills.io standard — works directly in Claude, ChatGPT/Codex, Cursor, Copilot & more.

Newsletter Forge is an AI newsletter-writing skill that turns a single topic into a send-ready issue: A/B subject lines, a matching preview text, a scannable structure, the full draft in your brand voice, and a clear, benefit-driven CTA — plus a best-practice self-check for mobile, deliverability and GDPR. Real reader value, no clichés.

What this skill does

  • Turns a topic into a complete, ready-to-send issue (subject, preheader, structure, draft, CTA)
  • Delivers 6–8 subject-line variants in different angles + a recommendation of which two to A/B test
  • Writes a preheader that complements the subject instead of repeating it (~30–90 chars)
  • Puts the reader benefit in the first lines — no hollow superlatives, claims concrete & verifiable
  • One clear, action- & benefit-driven primary CTA; everything in the copy leads there
  • Knows common newsletter types and copy frameworks (AIDA, PAS, BAB, benefit before feature)
  • Scannable & mobile-first; consistent brand voice
  • Best-practice self-check: mobile length, spam triggers, unsubscribe link/imprint/GDPR
  • Thinks measurable: optimizes for clicks/conversion instead of skewed open rates (Apple MPP)
  • Builds series/sequences on request (welcome, launch) or reusable templates
  • Topic & angle workshop: sharpens the core idea, reader benefit, timely hook and content pillars from a rough keyword (the topic has a say)
  • A type-specific approach per newsletter kind (goal, tone, structure, pitfall) instead of one-size-fits-all — incl. welcome as a 3–5-part sequence and 80/20 value-over-promotion

Description

Newsletter Forge is a skill for writing newsletters — from a single topic it writes a send-ready email with multiple subject-line variants, preview text, a scannable layout, and a benefit-driven CTA. A comprehensive, benefit-driven newsletter skill that doesn't advertise with fluff but makes the value visible. In one pass it produces a ready-to-send issue: 6–8 subject-line variants across different angles (benefit/outcome, curiosity gap, question, how-to/number, plain talk, optional personalization) with a length hint and a recommendation of which two to A/B test; a preheader that complements the subject instead of repeating it; a clear structure (hook → benefit → proof → CTA); the full, scannable draft in a direct tone and brand voice; one primary, action- and benefit-driven call-to-action; and a best-practice self-check. It knows the common newsletter types (editorial/story, curated digest, product/announcement, promo/offer, welcome/onboarding, re-engagement, event/invite) and proven copy frameworks (AIDA, PAS, BAB, benefit before feature, one idea per email). Best practices built in: subject ≤ ~40 chars with the hook in the first words, subject+preheader as a duo, mobile-first and scannable, honest subjects without clickbait/spam triggers (protects deliverability), unsubscribe link/sender/imprint/GDPR considered and — because open rates are skewed since Apple Mail Privacy Protection — optimization for clicks/conversion instead of opens. Invents nothing (placeholders instead of made-up numbers/discounts/testimonials) and sends nothing (your ESP handles delivery). Synergy: strategy via the SEO+GEO Briefing and the Audience Architect, A/B analysis via the A/B Test Auditor.

Examples

What it does not do

  • Invents no numbers, discounts, testimonials or dates (placeholders instead of claims)
  • Writes no clickbait/spam subjects and no misleading urgency
  • Sends nothing — delivery runs through your ESP
  • Doesn't replace legal review (GDPR/imprint are hints)
  • No empty ad fluff — the benefit must come through concretely

Compatibility & tech

Claude (Projects & system prompt)ChatGPT (Custom GPT & custom instructions)Any LLMOutput fits any ESP (Mailchimp, Brevo, MailerLite, CleverReach …)
Tested (internal)
3 scenarios
Recommended runtime
Strongest available model for nuanced, on-brand copy; optionally with web access for timely hooks.
Modes
Full issue · Topic & angle workshop · Subject-line workshop · Structure/outline · Edit/optimize · Series/sequence · Reusable template
Inputs
Topic/story · Bullet points · Existing newsletter draft · optional: goal, audience, type, brand voice, CTA/link
Output format
Full issue: subject-line variants (A/B) + preheader + sender, structure, full draft with CTA and optional P.S., best-practice self-check
Subcategory
Email marketing
License
Proprietär

Security profile

Local

Runs entirely on your machine with your own AI — no external runtime, no running costs.

Instruction-only

Only instructions, templates and references — no executable scripts.

No network access

Works offline with what you provide — does not call external services on its own.

What do these badges mean? →

What you get

  • newsletter-forge-1.3.0/2 files
    • .claude-plugin/marketplace.json
    • plugins/newsletter-forge/skills/newsletter-forge/2 files
      • SKILL.md
      • manifest.json
    • .agents/skills/newsletter-forge/→ universal — same content (Codex, Cursor, Copilot, Gemini, Windsurf, Cline)
    • LICENSE.txt

Installation

After unlocking, you install with a single command — it auto-detects your AI tool.

Runs inClaude CodeGitHub CopilotGemini CLICursorCodex CLIWindsurfCline

Also works as a chat prompt

Full in chat

No AI tool? Paste it into Claude, ChatGPT or Gemini and use the method right away.

This skill ships no scripts, so the prompt carries its full method.

Installing is the full version — it triggers automatically, runs its scripts and loads references as needed. As a chat prompt you drive the method by hand.

Unlock to copy the ready-to-paste prompt — then in “My Skills”.

Reviews

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Note

Best with a topic, goal (one action), audience, newsletter type and brand voice; without these the skill asks briefly or works with clearly flagged placeholders.

Changelog

  • v1.3.022.06.2026Platform-native output: now actively uses your platform's native formatting — tables, checklists, code blocks and clickable/button options, with a numbered fallback on non-interactive platforms. Plus internal metadata that prepares the upcoming agent builder.
  • v1.2.018.06.2026Reworked to the AUTHORING v2 standard: realistic input/answer examples (incl. a calibration case), copy checklist(s) and internal evals; cross-references added.
  • v1.1.010.06.2026Extended from research & testing: topic/angle workshop (core idea, reader benefit, timely hook, content pillars); a dedicated approach per newsletter type (goal/tone/structure/pitfall); welcome as a 3–5-part sequence, 80/20 value-over-promotion, segmentation & a fixed cadence.
  • v1.0.010.06.2026Comprehensive, benefit-driven newsletter skill: a complete issue from a topic (subject variants + preheader, structure, draft, CTA, self-check), newsletter types, copy frameworks (AIDA/PAS/BAB), best practices (mobile ≤40 chars, subject+preheader duo, honest subjects, deliverability, GDPR, optimize for clicks/conversion over opens), series & templates; invents nothing, sends nothing.

Frequently asked questions

What does Newsletter Forge do?

Newsletter Forge is an AI newsletter-writing skill that turns a single topic into a send-ready issue: A/B subject lines, a matching preview text, a scannable structure, the full draft in your brand voice, and a clear, benefit-driven CTA — plus a best-practice self-check for mobile, deliverability and GDPR. Real reader value, no clichés.

How do I write a good newsletter?

Newsletter Forge turns a topic or story into a send-ready email with a scannable layout, a brand voice that fits, and an action- and benefit-driven CTA — real reader value, not ad clichés. Give it a topic and goal and it drafts the whole issue.

How do I write a good email subject line?

Newsletter Forge gives you 6–8 subject-line variants across different angles (benefit, curiosity, question, number) to A/B test, plus matching preview text, so your email gets opened instead of ignored.

How do I improve email open and click-through rates?

Newsletter Forge leans on benefit-driven subject lines, a scannable layout, and one clear CTA — and runs a best-practice self-check for mobile, deliverability, and GDPR. It optimizes for clicks and conversions, not opens skewed by Apple Mail Privacy Protection.

What do I need to watch out for legally in a newsletter?

Newsletter Forge checks your draft for things like GDPR, an unsubscribe link and an imprint, plus deliverability, so the email not only reads well but also lands cleanly in inboxes. It flags issues but doesn't replace legal review.

Which AI tools does Newsletter Forge work with?

Claude (Projects & system prompt) · ChatGPT (Custom GPT & custom instructions) · Any LLM · Output fits any ESP (Mailchimp, Brevo, MailerLite, CleverReach …)

How do I use Newsletter Forge?

Newsletter Forge is a SKILL.md in the open agentskills.io standard: install it with one command (npx) or download it and add it to your AI tool — Claude (Projects), ChatGPT (Custom GPT), Cursor, Copilot, Gemini CLI and more. No code needed.