What is newsletter-publishing?

A set of workflows for email newsletters, which are recurring emails sent to a subscriber list. It covers content planning, templates, audience management, delivery, and engagement measurement.

It helps create newsletters, build and segment subscriber lists, design email templates, plan editorial calendars, migrate platforms, and analyze opens and clicks.

It gives teams a structured way to plan newsletter content and manage the work around sending it. It also helps address problems such as poor deliverability or low reader engagement.

newsletter-publishing — Skill for Claude Code and Codex by jamditis

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent

npx skills add jamditis/claude-skills-journalism --skill newsletter-publishing

Clone the repo

git clone --depth 1 https://github.com/jamditis/claude-skills-journalism

Made for: Claude Code, Codex.

Or install journalism-core, the plugin that ships this one along with the rest of its 16 skills.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/skills/jamditis/claude-skills-journalism/newsletter-publishing/github.svg)](https://agentmods.dev/skills/jamditis/claude-skills-journalism/newsletter-publishing)

Your own site

<a href="https://agentmods.dev/skills/jamditis/claude-skills-journalism/newsletter-publishing"><img src="https://agentmods.dev/badge/skills/jamditis/claude-skills-journalism/newsletter-publishing/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/jamditis/claude-skills-journalism/newsletter-publishing"><img src="https://agentmods.dev/badge/skills/jamditis/claude-skills-journalism/newsletter-publishing.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 24 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 4,204 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits

NVIDIA SkillSpector pass 7 Sept 2026

How audits are shown

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00024	$0.04204
Opus 5.5	$0.00010	$0.01682
Sonnet 5.5	$0.00005	$0.00841
Haiku 4.5	$0.00002	$0.00420

Measured 2mo ago against content hash 5db74f2d492d, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

newsletter-publishing scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

journalism-core/skills/newsletter-publishing/SKILL.md · 577 lines

How it starts

The opening of the file, as written. The whole thing — 577 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Practical workflows for building and managing email newsletters for journalism and academia.

When to activate

Creating a new newsletter from scratch
Designing email templates for journalism content
Building and segmenting subscriber lists
Analyzing newsletter performance metrics
Planning editorial calendars for newsletters
Migrating between newsletter platforms
Improving deliverability and open rates

Content strategy framework

## Newsletter strategy document

### Core identity
- **Name**:
- **Tagline** (one line):
- **What readers get**: [specific value proposition]
- **Frequency**: [ ] Daily [ ] Weekly [ ] Bi-weekly [ ] Monthly

### Target audience
- Primary reader:
- What they care about:
- Why they'll subscribe:
- What they'll do with this info:

### Content pillars
1. [Core topic 1] - [how often]
2. [Core topic 2] - [how often]
3. [Recurring feature] - [how often]

### Voice and tone
- Formal ↔ Conversational: [1-5]
- Serious ↔ Light: [1-5]
- Reported ↔ Personal: [1-5]

### Success metrics (first 6 months)
- Subscriber goal:
- Target open rate:
- Target click rate:

Issue structure template

## [Newsletter Name] - Issue #[XX]
**Date**: [Date]
**Subject line**: [Subject]
**Preview text**: [First 50-90 characters readers see]

---

### Opening hook
[2-3 sentences that make readers want to keep reading]

### Main story
[Your primary content - 300-600 words for most newsletters]

### Secondary items (if applicable)
- **Quick hit 1**: [Brief item with link]
- **Quick hit 2**: [Brief item with link]

### Recurring section
[Weekly column, data point, recommendation, etc.]

### Sign-off
[Personal note, call to action, or preview of next issue]

---

**Unsubscribe** | **Preferences** | **Forward to a friend**

Technical implementation

HTML email template (responsive)

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>{{newsletter_name}}</title>
  <style>
    /* Reset styles for email clients */
    body { margin: 0; padding: 0; width: 100%; }
    table { border-collapse: collapse; }
    img { border: 0; display: block; }

    /* Responsive container */
    .container {
      max-width: 600px;
      margin: 0 auto;
      font-family: Georgia, serif;
      font-size: 18px;
      line-height: 1.6;
      color: #333;
    }

    /* Dark mode support */
    @media (prefers-color-scheme: dark) {
      .container { background-color: #1a1a1a; color: #e0e0e0; }
      a { color: #6db3f2; }
    }

    /* Mobile styles */
    @media only screen and (max-width: 480px) {
      .container { padding: 15px !important; }
      h1 { font-size: 24px !important; }
    }
  </style>
</head>
<body>
  <table role="presentation" width="100%">
    <tr>
      <td align="center" style="padding: 20px;">
        <div class="container">
          <!-- Header -->
          <table width="100%">
            <tr>
              <td style="padding-bottom: 20px; border-bottom: 2px solid #333;">
                <h1 style="margin: 0;">{{newsletter_name}}</h1>
                <p style="margin: 5px 0 0; color: #666;">{{issue_date}}</p>
              </td>
            </tr>
          </table>

          <!-- Content -->
          <table width="100%">
            <tr>
              <td style="padding: 30px 0;">
                {{content}}
              </td>
            </tr>
          </table>

          <!-- Footer -->
          <table width="100%">
            <tr>
              <td style="padding-top: 20px; border-top: 1px solid #ddd; font-size: 14px; color: #666;">
                <p>You're receiving this because you subscribed to {{newsletter_name}}.</p>
                <p>
                  <a href="{{unsubscribe_url}}">Unsubscribe</a> |
                  <a href="{{preferences_url}}">Update preferences</a>
                </p>
              </td>
            </tr>
          </table>
        </div>
      </td>
    </tr>
  </table>
</body>
</html>

Read the full file on GitHub · 577 lines

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

agents/openai.yaml 101 B

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

2mo ago First seen · 577 lines · 24 tokens per session scan A 5db74f2d492d

Subscribe to this mod's changes

newsletter-publishing is a skill published in the GitHub repository jamditis/claude-skills-journalism (448 stars, last pushed 2d ago), licensed MIT. It adds 24 tokens to every session and 4,204 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Claude Code Marketing and SEO Writing and docs academic-writing claude claude-skills data-journalism fact-checking

newsletter-publishing next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
newsletter-publishingjamditis/claude-skills-journalism	Skill	448	2d ago	MIT	A	24	Claude Code, Codex
running-cluster-experimentschgagne/claude-skills-research	Skill	5	yesterday	MIT	A	72	Claude Code, Codex
explaining-derivationschgagne/claude-skills-research	Skill	5	yesterday	MIT	A	109	Claude Code, Codex
self-surveying-literaturechgagne/claude-skills-research	Skill	5	yesterday	MIT	A	136	Claude Code, Codex
food-researchPangenomeAI/academic-skills-food-nutrition	Skill	41	2mo ago	MIT	A	154	Claude Code
data-table-formatterur-grue/autopunk-media-skills	Skill	43	2mo ago	MIT	A	46	Claude Code
food-chemistryPangenomeAI/academic-skills-food-nutrition	Skill	41	2mo ago	MIT	A	110	Claude Code