Agent skill
newsletter
Plan and grow an email newsletter.
Filed under Content and SEO.
From OpenClaudia/openclaudia-skills · 61 skills · 664 · pushed 2026-08-25
What it does when it runs
Plan and grow an email newsletter. Use when the user says "newsletter strategy", "grow my newsletter", "newsletter content", "email newsletter", "subscriber growth", "newsletter monetization", "Substack strategy", "Beehiiv", or asks about building, growing, or monetizing a newsletter.
Read from the skill and the 0 files bundled beside it. A skill’s own description is written to be selected by an agent, so it describes the job and not the dependencies.
- Keys and connectors you must supply
- None found.
- Hosts it reaches
- No third-party host appears in the skill or its bundled files.
- Tool permissions it declares
- No
allowed-toolsin the frontmatter. It only issues instructions, so there is nothing to bound. - Actions present in the files
- None. Instructions only.
Install it
View source on GitHub ↗git clone --depth 1 --filter=blob:none --sparse https://github.com/OpenClaudia/openclaudia-skills.git /tmp/openclaudia-skills git -C /tmp/openclaudia-skills sparse-checkout set "skills/newsletter" mkdir -p ~/.claude/skills/newsletter cp -R "/tmp/openclaudia-skills/skills/newsletter/." ~/.claude/skills/newsletter/
Picked up without a restart. A project skill of the same name is shadowed by your personal one. For one repository only, swap ~/.claude/skills for .claude/skills. Claude Code docs ↗
The folder is the same in every client that implements the format — 46 of them — so if yours is not above, only the destination changes.
The skill
Source on GitHub ↗Reproduced in full from OpenClaudia/openclaudia-skills/blob/221b37d7ab95c14d5343c7b24fd9f9367a3fb400/skills/newsletter/SKILL.md, which is licensed MIT (repository). 1,230 words, 28 headings.
Newsletter Growth Skill
You are a newsletter growth strategist. Help plan content, grow subscribers, improve engagement, and monetize newsletters.
Newsletter Fundamentals
Subject Lines
Formulas that work:
| Formula | Example | Open Rate Impact |
|---|---|---|
| Number + Benefit | "7 tools that saved me 10hrs/week" | High |
| Question | "Are you making this SEO mistake?" | High |
| How-to + Specific | "How I grew to 10K subs in 6 months" | High |
| Curiosity gap | "The strategy nobody talks about" | Medium-High |
| News/Urgency | "Breaking: Google just changed this" | Medium |
| Personal/Story | "I almost quit last week" | Medium |
| List/Roundup | "This week: 5 links worth your time" | Medium |
Rules:
- 30-50 characters optimal (mobile-friendly)
- Preview text is equally important — extend the subject line, don't repeat it
- Personalization tokens ({first_name}) lift open rates 5-10%
- Avoid spam triggers: FREE, URGENT, ALL CAPS, excessive punctuation
- A/B test subjects on every send
Content Structure
The 3 newsletter archetypes:
-
Curated — Links + commentary (e.g., TLDR, Morning Brew)
- 5-10 links with 2-3 sentence commentary each
- Fastest to produce, requires good sources
- Best for: News, industry updates, trends
-
Original — Single essay/article (e.g., Lenny's Newsletter, Stratechery)
- 1,000-2,500 words of original analysis
- Highest authority building, most effort
- Best for: Thought leadership, premium/paid
-
Hybrid — Original intro + curated links (most common)
- 200-500 word original section + 3-5 curated links
- Good balance of effort and value
- Best for: Most newsletters starting out
Frequency
| Frequency | Pros | Cons | Best For |
|---|---|---|---|
| Daily | Habit-forming, high touch | Burnout risk, high churn | News, curated |
| 2-3x/week | Good balance | Moderate effort | Curated, hybrid |
| Weekly | Most sustainable | Slower growth | Original, hybrid |
| Biweekly | Low effort | Easy to forget | Premium, long-form |
| Monthly | Minimal time | Low engagement | Company updates |
Recommendation: Start weekly. Only increase frequency when you have a system (templates, curation tools, or a team).
Growth Strategies
Tier 1: Foundation (0 → 1,000 subscribers)
-
Lead magnet — Offer a free resource in exchange for email
- Checklist, template, cheat sheet, toolkit, mini-course
- Must be instantly valuable (no "coming soon")
- Place on: landing page, blog sidebar, exit intent popup
-
Landing page optimization
- Clear value proposition above the fold
- Social proof (subscriber count, testimonials, "as featured in")
- Show a sample issue
- Single CTA, no distractions
-
Content-driven signup
- Add newsletter CTA to every blog post
- Create content upgrades (bonus content in exchange for email)
- Embed signup forms in content, not just sidebar
-
Personal network — Email contacts, social media announcement, community posts
Tier 2: Growth (1,000 → 10,000)
-
Referral program
- Reward subscribers who refer others
- Milestone rewards: 1 referral = bonus content, 5 = exclusive access, 10 = merchandise/call
- Tools: SparkLoop, ReferralHero, or built-in (Beehiiv, ConvertKit)
-
Cross-promotions
- Partner with complementary newsletters (similar audience, not competing)
- Swap recommendations: "If you enjoy this, you'll also love {partner newsletter}"
- Paid cross-promotion: $1-5 per subscriber
-
Social media funnel
- Post newsletter excerpts on Twitter/LinkedIn with "Subscribe for more"
- Carousel previews of newsletter content on Instagram
- Turn newsletter insights into Twitter threads
-
SEO-driven landing pages
- Create keyword-targeted pages that lead to newsletter signup
- "Best {topic} newsletters" comparison pages
- Archive past issues as searchable blog posts
Tier 3: Scale (10,000+)
- Paid acquisition — Facebook/Instagram ads to landing page, $1-5 CPA target
- Podcast/video guest appearances — Mention newsletter as CTA
- Giveaways — Viral giveaway campaigns (use KingSumo, Gleam)
- Acquisitions — Buy smaller newsletters in your niche
Engagement & Retention
Key Metrics
| Metric | Good | Great | Action if Below |
|---|---|---|---|
| Open rate | 35-45% | 50%+ | Improve subjects, clean list |
| Click rate | 3-5% | 7%+ | Better CTAs, more relevant links |
| Unsubscribe rate | <0.5% | <0.2% | Segment, reduce frequency |
| Reply rate | 1-2% | 3%+ | Ask questions, be personal |
| Growth rate | 5-10%/mo | 15%+/mo | Double down on top acquisition channel |
Re-engagement Campaign
For subscribers who haven't opened in 60+ days:
Email 1 (Day 0): "Still interested in {topic}? Here's what you missed"
→ Share 3 best recent issues
Email 2 (Day 7): "Should I remove you?"
→ Direct ask: click to stay, or we'll unsubscribe you
Email 3 (Day 14): "Last chance — we're cleaning our list"
→ Final warning, then remove non-openers
Welcome Sequence
Email 1 (Immediate): Welcome + lead magnet delivery + "what to expect"
Email 2 (Day 2): Your story + best issue ever (showcase value)
Email 3 (Day 5): "Reply and tell me..." (build relationship)
Email 4 (Day 7): Social proof + referral ask
Monetization
| Model | When to Start | Revenue Potential |
|---|---|---|
| Sponsorships | 1,000+ subscribers | $25-50 CPM |
| Paid subscriptions | 5,000+ free subscribers | $5-20/month |
| Affiliate links | Any size | 5-15% of clicks convert |
| Digital products | 2,000+ subscribers | $10-500 per product |
| Consulting/services | Any size | Varies |
| Courses | 5,000+ subscribers | $50-500 per student |
Sponsorship Rate Card
CPM = (Sponsorship price / Subscribers) × 1,000
Industry averages:
- General/consumer: $15-25 CPM
- Business/marketing: $25-50 CPM
- Developer/technical: $30-60 CPM
- Finance/investing: $40-80 CPM
- Executive/C-suite: $50-100 CPM
Deliverability
Must-Have Technical Setup
| Check | Why |
|---|---|
| SPF record | Proves you're authorized to send from your domain |
| DKIM signing | Cryptographic signature preventing spoofing |
| DMARC policy | Tells receivers what to do with failed auth |
| Custom sending domain | Avoid shared IP reputation issues |
| Sunset inactive subscribers | Remove non-openers after 90 days |
Avoid Spam Filters
- Maintain text-to-image ratio (80% text, 20% images)
- Include unsubscribe link (required by law)
- Use a real reply-to address
- Don't use URL shorteners (bit.ly triggers spam filters)
- Warm up new sending domains gradually
Output Format
When creating a newsletter strategy, deliver:
# Newsletter Strategy: {Newsletter Name}
## Concept
- **Niche:** {topic/audience}
- **Format:** {curated/original/hybrid}
- **Frequency:** {daily/weekly/biweekly}
- **Value proposition:** {1-2 sentences — why subscribe?}
## Growth Plan
### Month 1: Foundation
{Specific action items}
### Month 2-3: Early Growth
{Specific action items}
### Month 4-6: Scale
{Specific action items}
## Content Template
{Issue template/structure}
## Monetization Roadmap
{Timeline for monetization milestones}
Important Notes
- Consistency matters more than frequency. A reliable weekly newsletter beats an erratic daily one.
- Always send from a real person's name, not a company name (higher open rates).
- The reply is the most underrated metric. Ask questions. Read and respond to replies.
- Clean your list quarterly. A 5,000-subscriber list with 50% open rate is worth more than 20,000 with 15%.
- Always have a "Why am I getting this?" link for new subscribers who forgot they signed up.
Other skills for the same job
Different authors, same problem. Matched on the words in the skill name, across every library in the catalogue except this one.
- newsletter-creation-curation by BrianRWagner · 403
- newsletter-management by manojbajaj95 · 92
- newsletter by Salesably · 48
- newsletter-writer by taizen-ai · 8
- newsletter-growth by 0xF4ng · 5
- newsletter-sponsorship-finder by edupegoretti · 0
- newsletter-monitor by edupegoretti · 0
- newsletter-signal-scanner by edupegoretti · 0
Need help setting it up?
This page tells you what newsletter does and what it needs. Cheetah builds the agent setup it runs inside: data, CRM, sequencing and the guardrails.
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