Newsletter: Writing email newsletter edition... skill

Use this skill when the user says 'newsletter', 'email newsletter', 'weekly digest', 'subscriber growth', 'open rates', or needs subject lines, content structure, sponsorship placement, and growth tactics for email newsletters.

by cwinvestments·MIT license·GitHub ↗

★ 423 Stars on the repo·Checked

npx degit cwinvestments/memstack/skills/content/newsletter#master ~/.claude/skills/newsletter-2

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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

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% <20%
Click rate >3% <1%
Unsubscribe rate <0.5% per send >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)
1---
2name: memstack-content-newsletter
3description: "Use this skill when the user says 'newsletter', 'email newsletter', 'weekly digest', 'subscriber growth', 'open rates', or needs subject lines, content structure, sponsorship placement, and growth tactics for email newsletters. Do NOT use for lead magnets or content pipelines."
4version: 1.0.0
5license: "Proprietary, MemStack™ Pro by CW Affiliate Investments LLC. See LICENSE.txt"
6---
7 
8# Newsletter: Writing email newsletter edition...
9*Produces an email newsletter edition with subject line formulas, section structure, personalization, link placement strategy, growth tactics, and engagement optimization.*
10 
11## Activation
12 
13When this skill activates, output:
14 
15`Newsletter: Writing email newsletter edition...`
16 
17Then execute the protocol below.
18 
19## Context Guard
20 
21| Context | Status |
22|---------|--------|
23| User says "newsletter", "email newsletter", "weekly digest" | ACTIVE |
24| User says "subscriber growth" or "open rates" | ACTIVE |
25| User wants to write a newsletter edition or start a newsletter | ACTIVE |
26| User wants a lead magnet with email capture | DORMANT: use Lead Magnet |
27| User wants a full content automation pipeline | DORMANT: use Content Pipeline |
28 
29## Common Mistakes
30 
31| Mistake | Why It's Wrong |
32|---------|---------------|
33| "Newsletter = company updates" | Nobody cares about your company news. Deliver value: insights, tips, curated content. |
34| "Generic subject line" | "[Company] Monthly Newsletter" gets 10% opens. Curiosity-driven subjects get 35%+. |
35| "No consistent format" | Readers want predictable value. A consistent structure builds habit and trust. |
36| "Too many links" | More than 3-5 links per section dilutes clicks. Feature one primary link prominently. |
37| "No growth strategy" | "Build it and they will come" doesn't work. Actively promote every issue. |
38 
39## Protocol
40 
41### Step 1: Gather Newsletter Requirements
42 
43If the user hasn't provided details, ask:
44 
45> 1. **Topic/niche**: what's the newsletter about?
46> 2. **Audience**: who reads it? (role, industry, experience level)
47> 3. **Frequency**: weekly, biweekly, or monthly?
48> 4. **Type**: curated links, original essays, tips, industry news, or mixed?
49> 5. **Current state**: new or existing? (subscriber count, open rates)
50> 6. **Monetization**: free, paid, or sponsored?
51 
52### Step 2: Write the Subject Line
53 
54**Subject line formulas:**
55 
56| Formula | Template | Example |
57|---------|---------|---------|
58| **Curiosity gap** | [Topic]: The [thing] nobody talks about | "Pricing: The metric nobody tracks" |
59| **Numbered value** | [X] [things] to [outcome] this week | "5 tools to ship faster this week" |
60| **Question** | Why [common practice] [doesn't work / is wrong]? | "Why your landing page isn't converting?" |
61| **Personal** | I [did thing], here's what happened | "I quit meetings for a month" |
62| **Direct value** | How to [outcome] (in [constraint]) | "How to write copy that converts (in 20 min)" |
63| **Current event** | [Event/trend]: What it means for [audience] | "GPT-5: What it means for developers" |
64 
65**Subject line rules:**
66- 6-10 words (40-50 characters) for mobile display
67- No ALL CAPS, no spam triggers ("FREE", "ACT NOW", "!!!")
68- Preview text (first 90 characters of email) should complement, not repeat the subject
69- A/B test 2 subjects per send (most platforms support this)
70- Track open rates by subject formula, double down on what works
71 
72### Step 3: Design Section Structure
73 
74**Newsletter format template:**
75 
76```markdown
77# [Newsletter Name]: [Edition Title or Number]
78 
79## Intro (2-3 sentences)
80[Personal note, context for this edition, or a hook that frames the content]
81 
82---
83 
84## [Section 1: Primary Content] (60% of newsletter)
85[Your main value: original insight, deep dive, or featured piece]
86[Include one primary CTA link]
87 
88---
89 
90## [Section 2: Quick Hits / Curated] (25% of newsletter)
91### [Item 1 title]
92[1-2 sentence summary + link]
93 
94### [Item 2 title]
95[1-2 sentence summary + link]
96 
97### [Item 3 title]
98[1-2 sentence summary + link]
99 
100---
101 
102## [Section 3: Closer] (15% of newsletter)
103[Personal sign-off, question for readers, or community highlight]
104 
105---
106 
107[Footer: Unsubscribe | Forward to a friend | [Social links]]
108```
109 
110**Section type options (pick 2-4 per edition):**
111 
112| Section | Content | Purpose |
113|---------|---------|---------|
114| **Deep Dive** | Original essay or analysis (500-800 words) | Demonstrate expertise |
115| **Quick Hits** | 3-5 curated links with one-line summaries | Deliver breadth of value |
116| **Tool/Resource** | Featured tool with your take on it | Practical value |
117| **Tip of the Week** | One actionable tactic they can use today | Quick win |
118| **Community Spotlight** | Reader question, testimonial, or submission | Build community |
119| **Sponsor Section** | Sponsored content (clearly labeled) | Monetization |
120| **Poll/Question** | Ask readers something: drives replies | Engagement signal |
121 
122### Step 4: Write the Edition
123 
124**Intro paragraph rules:**
125- 2-3 sentences maximum
126- Personal and conversational (not corporate)
127- Frames why THIS edition matters
128- Optional: reference a current event or reader feedback
129 
130**Body content rules:**
131- Write at an 8th-grade reading level (clear, accessible)
132- Use headers, bold, and bullet points for scannability
133- One idea per paragraph (3 sentences max)
134- Link text should describe the destination ("Read the full case study" not "Click here")
135- Primary CTA should appear within the first scroll (above 300 words)
136 
137**Personalization techniques:**
138 
139| Technique | Implementation | Impact |
140|----------|---------------|--------|
141| First name in subject | "Hey {first_name}, [subject]" | +10-15% open rate |
142| Segment by interest | Tag subscribers → send relevant content | +20-30% click rate |
143| Reference past behavior | "Since you read about [topic]..." | Higher engagement |
144| Reader-submitted content | Feature reader questions or wins | Community loyalty |
145 
146### Step 5: Link Placement Strategy
147 
148**Link placement hierarchy:**
149 
150| Position | Purpose | Click Priority |
151|----------|---------|---------------|
152| **Above the fold** (first 100 words) | Primary CTA or featured link | Highest |
153| **End of main section** | Deeper reading link | High |
154| **Quick hits section** | Curated resource links | Medium |
155| **Closer** | Social follow or referral link | Low |
156 
157**Rules:**
158- 1 primary link per edition (the ONE thing you want them to click)
159- 3-5 secondary links maximum (curated content, resources)
160- No more than 8 total links (including footer): too many dilutes clicks
161- Use descriptive anchor text, not raw URLs
162- Track clicks with UTM parameters: `?utm_source=newsletter&utm_medium=email&utm_campaign=edition-[N]`
163 
164### Step 6: Growth Tactics
165 
166**Subscriber acquisition channels:**
167 
168| Channel | Tactic | Expected Growth |
169|---------|--------|----------------|
170| **Website** | Email capture in header, footer, and exit-intent popup | Steady baseline |
171| **Social media** | Share a highlight from each edition with subscribe link | 5-15 subs/post |
172| **Twitter/X threads** | End threads with "I go deeper in my newsletter: [link]" | 10-50 subs/thread |
173| **Cross-promotion** | Swap recommendations with similar-sized newsletters | 50-200 per swap |
174| **Referral program** | "Refer 3 friends → get [bonus]" | 10-20% of new subs |
175| **Gated content** | Best content behind email signup (lead magnet) | High conversion |
176| **Guest posts** | Write for others, link to newsletter in bio | 20-100 per post |
177 
178**Retention metrics to track:**
179 
180| Metric | Target | Red Flag |
181|--------|--------|----------|
182| Open rate | >35% | <20% |
183| Click rate | >3% | <1% |
184| Unsubscribe rate | <0.5% per send | >1% |
185| Reply rate | >0.5% | 0% (no engagement) |
186| Growth rate (net) | >5% monthly | Negative (losing subs) |
187 
188### Step 7: Scheduling & Send Optimization
189 
190**Optimal send times:**
191 
192| Audience | Best Day | Best Time | Why |
193|----------|---------|-----------|-----|
194| Business / B2B | Tuesday-Thursday | 9-10 AM local | Morning inbox check |
195| Creators / Solo | Tuesday or Saturday | 8-9 AM local | Before the day fills up |
196| Developers | Wednesday | 10 AM local | Mid-week engagement peak |
197| General / Consumer | Sunday or Tuesday | 9-10 AM local | Weekend reading or fresh week |
198 
199**Pre-send checklist:**
200- [ ] Subject line is 6-10 words, creates curiosity
201- [ ] Preview text complements the subject (not a repeat)
202- [ ] All links work (click-test every one)
203- [ ] UTM parameters on all links
204- [ ] Images have alt text
205- [ ] Mobile preview looks good (60%+ open on mobile)
206- [ ] Unsubscribe link is visible
207- [ ] Spell check passed
208- [ ] Send a test email to yourself first
209 
210## Output Format
211 
212```markdown
213# [Newsletter Name]: Edition [#]
214 
215**Subject:** [Subject line]
216**Preview text:** [90 characters]
217**Send date:** [Date, Time, Timezone]
218 
219---
220 
221[Full newsletter content following the structure from Step 3]
222 
223---
224 
225## Metrics to Track
226- Open rate target: [X]%
227- Click rate target: [X]%
228- Primary CTA link: [URL]
229```
230 
231## Completion
232 
233```
234Newsletter: Complete!
235 
236Edition: [#/Title]
237Subject line: "[Subject]"
238Sections: [Count]
239Links: [Count] ([1] primary, [X] secondary)
240Word count: [X]
241 
242Next steps:
2431. Load into your email platform
2442. Preview on mobile (most opens are mobile)
2453. A/B test the subject line (send 2 variants to 20% each, winner to 60%)
2464. Schedule for [optimal time]
2475. After sending: share a highlight on social media with subscribe CTA
248```
249 
250## Level History
251 
252- **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)
253 

Discussion

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