Memstack Content Newsletter

Newsletter — Writing email newsletter edition...

Produces an email newsletter edition with subject line formulas, section structure, personalization, link placement strategy, growth tactics, and engagement optimization.

Activation

When this skill activates, output:

Newsletter — Writing email newsletter edition...

Then execute the protocol below.

Context Guard

| Context | Status | |---------|--------| | User says "newsletter", "email newsletter", "weekly digest" | ACTIVE | | User says "subscriber growth" or "open rates" | ACTIVE | | User wants to write a newsletter edition or start a newsletter | ACTIVE | | User wants a lead magnet with email capture | DORMANT — use Lead Magnet | | User wants a full content automation pipeline | DORMANT — use Content Pipeline |

Common Mistakes

| Mistake | Why It's Wrong | |---------|---------------| | "Newsletter = company updates" | Nobody cares about your company news. Deliver value: insights, tips, curated content. | | "Generic subject line" | "[Company] Monthly Newsletter" gets 10% opens. Curiosity-driven subjects get 35%+. | | "No consistent format" | Readers want predictable value. A consistent structure builds habit and trust. | | "Too many links" | More than 3-5 links per section dilutes clicks. Feature one primary link prominently. | | "No growth strategy" | "Build it and they will come" doesn't work. Actively promote every issue. |

Protocol

Step 1: Gather Newsletter Requirements

If the user hasn't provided details, ask:

> 1. Topic/niche — what's the newsletter about? > 2. Audience — who reads it? (role, industry, experience level) > 3. Frequency — weekly, biweekly, or monthly? > 4. Type — curated links, original essays, tips, industry news, or mixed? > 5. Current state — new or existing? (subscriber count, open rates) > 6. Monetization — free, paid, or sponsored?

Step 2: Write the Subject Line

Subject line formulas:

| Formula | Template | Example | |---------|---------|---------| | Curiosity gap | [Topic]: The [thing] nobody talks about | "Pricing: The metric nobody tracks" | | Numbered value | [X] [things] to [outcome] this week | "5 tools to ship faster this week" | | Question | Why [common practice] [doesn't work / is wrong]? | "Why your landing page isn't converting?" | | Personal | I [did thing] — here's what happened | "I quit meetings for a month" | | Direct value | How to [outcome] (in [constraint]) | "How to write copy that converts (in 20 min)" | | Current event | [Event/trend]: What it means for [audience] | "GPT-5: What it means for developers" |

Subject line rules:

• 6-10 words (40-50 characters) for mobile display
• No ALL CAPS, no spam triggers ("FREE", "ACT NOW", "!!!")
• Preview text (first 90 characters of email) should complement, not repeat the subject
• A/B test 2 subjects per send (most platforms support this)
• Track open rates by subject formula — double down on what works

Step 3: Design Section Structure

Newsletter format template:

# [Newsletter Name] — [Edition Title or Number]

## Intro (2-3 sentences)
[Personal note, context for this edition, or a hook that frames the content]

---

## [Section 1: Primary Content] (60% of newsletter)
[Your main value — original insight, deep dive, or featured piece]
[Include one primary CTA link]

---

## [Section 2: Quick Hits / Curated] (25% of newsletter)
### [Item 1 title]
[1-2 sentence summary + link]

### [Item 2 title]
[1-2 sentence summary + link]

### [Item 3 title]
[1-2 sentence summary + link]

---

## [Section 3: Closer] (15% of newsletter)
[Personal sign-off, question for readers, or community highlight]

---

[Footer: Unsubscribe | Forward to a friend | [Social links]]

Section type options (pick 2-4 per edition):

| Section | Content | Purpose | |---------|---------|---------| | Deep Dive | Original essay or analysis (500-800 words) | Demonstrate expertise | | Quick Hits | 3-5 curated links with one-line summaries | Deliver breadth of value | | Tool/Resource | Featured tool with your take on it | Practical value | | Tip of the Week | One actionable tactic they can use today | Quick win | | Community Spotlight | Reader question, testimonial, or submission | Build community | | Sponsor Section | Sponsored content (clearly labeled) | Monetization | | Poll/Question | Ask readers something — drives replies | Engagement signal |

Step 4: Write the Edition

Intro paragraph rules:

• 2-3 sentences maximum
• Personal and conversational (not corporate)
• Frames why THIS edition matters
• Optional: reference a current event or reader feedback

Body content rules:

• Write at an 8th-grade reading level (clear, accessible)
• Use headers, bold, and bullet points for scannability
• One idea per paragraph (3 sentences max)
• Link text should describe the destination ("Read the full case study" not "Click here")
• Primary CTA should appear within the first scroll (above 300 words)

Personalization techniques:

| Technique | Implementation | Impact | |----------|---------------|--------| | First name in subject | "Hey {first_name}, [subject]" | +10-15% open rate | | Segment by interest | Tag subscribers → send relevant content | +20-30% click rate | | Reference past behavior | "Since you read about [topic]..." | Higher engagement | | Reader-submitted content | Feature reader questions or wins | Community loyalty |

Step 5: Link Placement Strategy

Link placement hierarchy:

| Position | Purpose | Click Priority | |----------|---------|---------------| | Above the fold (first 100 words) | Primary CTA or featured link | Highest | | End of main section | Deeper reading link | High | | Quick hits section | Curated resource links | Medium | | Closer | Social follow or referral link | Low |

Rules:

• 1 primary link per edition (the ONE thing you want them to click)
• 3-5 secondary links maximum (curated content, resources)
• No more than 8 total links (including footer) — too many dilutes clicks
• Use descriptive anchor text, not raw URLs
• Track clicks with UTM parameters: ?utm_source=newsletter&utm_medium=email&utm_campaign=edition-[N]

Step 6: Growth Tactics

Subscriber acquisition channels:

| Channel | Tactic | Expected Growth | |---------|--------|----------------| | Website | Email capture in header, footer, and exit-intent popup | Steady baseline | | Social media | Share a highlight from each edition with subscribe link | 5-15 subs/post | | Twitter/X threads | End threads with "I go deeper in my newsletter: [link]" | 10-50 subs/thread | | Cross-promotion | Swap recommendations with similar-sized newsletters | 50-200 per swap | | Referral program | "Refer 3 friends → get [bonus]" | 10-20% of new subs | | Gated content | Best content behind email signup (lead magnet) | High conversion | | Guest posts | Write for others, link to newsletter in bio | 20-100 per post |

Retention metrics to track:

| Metric | Target | Red Flag | |--------|--------|----------| | Open rate | >35% | 3% | 1% | | Reply rate | >0.5% | 0% (no engagement) | | Growth rate (net) | >5% monthly | Negative (losing subs) |

Step 7: Scheduling & Send Optimization

Optimal send times:

| Audience | Best Day | Best Time | Why | |----------|---------|-----------|-----| | Business / B2B | Tuesday-Thursday | 9-10 AM local | Morning inbox check | | Creators / Solo | Tuesday or Saturday | 8-9 AM local | Before the day fills up | | Developers | Wednesday | 10 AM local | Mid-week engagement peak | | General / Consumer | Sunday or Tuesday | 9-10 AM local | Weekend reading or fresh week |

Pre-send checklist:

• [ ] Subject line is 6-10 words, creates curiosity
• [ ] Preview text complements the subject (not a repeat)
• [ ] All links work (click-test every one)
• [ ] UTM parameters on all links
• [ ] Images have alt text
• [ ] Mobile preview looks good (60%+ open on mobile)
• [ ] Unsubscribe link is visible
• [ ] Spell check passed
• [ ] Send a test email to yourself first

Output Format

# [Newsletter Name] — Edition [#]

**Subject:** [Subject line]
**Preview text:** [90 characters]
**Send date:** [Date, Time, Timezone]

---

[Full newsletter content following the structure from Step 3]

---

## Metrics to Track
- Open rate target: [X]%
- Click rate target: [X]%
- Primary CTA link: [URL]

Completion

Newsletter — Complete!

Edition: [#/Title]
Subject line: "[Subject]"
Sections: [Count]
Links: [Count] ([1] primary, [X] secondary)
Word count: [X]

Next steps:
1. Load into your email platform
2. Preview on mobile (most opens are mobile)
3. A/B test the subject line (send 2 variants to 20% each, winner to 60%)
4. Schedule for [optimal time]
5. After sending: share a highlight on social media with subscribe CTA

Level History

• Lv.1 — Base: 6 subject line formulas, section structure template (intro, deep dive, quick hits, closer), body writing rules with personalization techniques, link placement hierarchy (primary + secondary), 7 growth channels with expected results, retention metrics with red flags, send time optimization, pre-send checklist. (Origin: MemStack Pro v3.2, Mar 2026)

Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

• Author: cwinvestments
• Source: cwinvestments/memstack
• License: MIT
• Homepage: https://memstack.pro

Install and usage instructions live in the source repository linked above.