How Newsletters
Writing style reference based on case studies of successful newsletters. This skill should be used when the user wants to write in the distinctive voice and style of professional newsletter writers, or when creating content that needs to feel authentic and human rather than AI-generated.
Install
$ agentstack add skill-cdeistopened-content-os-how-newsletters ✓ 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.
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Links to your public security report.[](https://agentstack.voostack.com/security/report/skill-cdeistopened-content-os-how-newsletters) Reliability & compatibility
Declared compatibility
Compatibility is declared by the source manifest. End-to-end runtime verification is coming, see below.
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How Newsletters
A collection of 16 case studies analyzing the voice, structure, and techniques of successful newsletters. Use these as style references when writing content that needs to feel distinctively human.
When to Use This Skill
- Writing newsletter content that needs authentic voice
- Analyzing what makes writing feel "human" vs "AI"
- Learning from specific newsletter styles (Hustle, Chartr, Huckberry, etc.)
- Creating content with distinctive personality
Case Study Library
Location: /Users/charlesdeist/Desktop/Documents/How /
| Case Study | Key Insight | |------------|-------------| | How The Hustle thinks about voice | Voice construction, personality-driven writing | | Inside The Hustle's redesign | Visual design meets editorial voice | | How Chartr reimagined visual storytelling | Data visualization + narrative | | How Huckberry reimagined the marketing email | Commercial writing that reads like editorial | | How Cyber Patterns built a business on memes | Informal voice, internet culture | | How Polina Pompliano reinvented The Profile | Profile writing, interview-based content | | How Semafor reinvented the news brief | Brevity, information density | | How The Infatuation upended restaurant reviews | Opinionated voice, casual authority | | How Yahoo Sports AM reimagined the sports page | Morning brief format, energy | | Why 700k people love Contrarian Thinking | Conviction-driven writing | | How After School capitalizes on youth trends | Gen-Z voice, trend awareness | | How Marriage Minute became a must-read | Niche authority, relationship-building | | How Petition made a multimillion-dollar business | Scarcity, urgency, exclusivity | | What we can learn from James Clear | Clarity, simplicity, actionable advice | | Why less is more in newsletters | Editing, restraint | | The 5 coolest things I saw in newsletters this year | Curation, discovery |
Usage Pattern
- Before writing: Read 1-2 relevant case studies from the library to internalize the voice
- During writing: Reference specific techniques from the case studies
- After writing: Compare draft against case study examples for authenticity
Style Principles (Extracted Themes)
From analyzing these newsletters, common principles emerge:
- Voice over information - The personality matters as much as the content
- Specificity creates trust - Concrete details > vague claims
- Opinions are features - Strong takes differentiate from AI-generated content
- Rhythm matters - Sentence length variation creates readability
- Cultural references anchor - References to real things signal human authorship
- Imperfection is authentic - Contractions, incomplete sentences, parentheticals
Example Invocation
When user asks: "Help me write a newsletter intro about productivity tools"
- Read relevant case study (e.g., "What we can learn from James Clear")
- Note the specific techniques used
- Apply those techniques to the user's topic
- Write in that voice, not generic AI prose
Related Skills
human-writing- General human writing transformationquality-loop- Iterative drafting with quality gates
Source & license
This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.
- Author: cdeistopened
- Source: cdeistopened/content-os
- License: MIT
Install and usage instructions live in the source repository linked above.
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Versions
- v0.1.0 Imported from the upstream source.