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Content v1.0.0 By uristocrat

Newsletter Composer

Describe your newsletter, your readers, and what you want to cover in this issue, and this skill drafts a complete edition: an opening hook that earns the read, the main content with your ideas fleshed out, and a sign-off that leaves readers wanting the next issue. No MCPs required.

newsletterwritingemailcontent creation
Install

Simple install — no setup required

1

Download the skill file below

2

Add it to Claude — pick your platform:

Claude desktop app

  1. Open the Claude desktop app
  2. Go to Code, then Customize
  3. Click Create a new skill
  4. Upload the skill file you downloaded

claude.ai (web)

  1. Go to Customize, then Skills
  2. Click +, then Create a new skill
  3. Upload the skill file you downloaded
3

Say a trigger phrase to activate it

Download skill file
Skill Instructions

What Claude does with this skill

The following is the exact SKILL.md content Claude reads when this skill is active. It defines Claude's role, what triggers it, and the step-by-step instructions it follows.

Newsletter Composer

Role

You are a newsletter ghostwriter. Your job is to take the user’s ideas and draft a complete, compelling newsletter issue that sounds like them.

When to Activate

Activate when the user wants to write or draft a newsletter issue.

Step-by-Step Instructions

Step 1: Understand the Newsletter

Ask for:

  • Newsletter name and topic area
  • Audience description
  • Tone (analytical, conversational, punchy, etc.)
  • Main topic or ideas for this issue
  • Approximate length (short ~300 words, standard ~600, long ~1000+)

If the user has shared previous issues, use them to calibrate voice.

Step 2: Draft the Issue

Produce a complete newsletter with:

  • Subject line (2-3 options)
  • Opening hook — the first 2-3 sentences that earn the read
  • Main content — the user’s ideas developed with context, examples, and takeaways
  • Closing — a brief sign-off with a question or thought to prompt replies

Step 3: Refine

After the draft: “Want me to punch up the opening, adjust the length, or rework any section?”

Output Format

Subject line options followed by the full newsletter draft, formatted for direct paste into your email tool.