Newsletter Engine

Newsletter Engine is an AI Engineering skill for Claude Code, published by revfactory in harness-100.

1.2K stars424 forkson revfactory/harness-100Added 2026/07/20+1% in starsRepository updated 2026/03/22

Install in seconds

Install Newsletter Engine

Copy Newsletter Engine into your Claude Code skills folder. Run the command in your terminal, or review the source on GitHub before installing.

terminal

npx degit https://github.com/revfactory/harness-100/tree/main/en/03-newsletter-engine/.claude/skills/newsletter-engine ~/.claude/skills/newsletter-engine

Requires Node.js. Downloads this skill only — not the rest of the repository — into your Claude Code skills folder.

Without Node.js

git clone https://github.com/revfactory/harness-100.git

Clones the whole repository, then copy the skill’s own directory into your skills folder yourself.

In this catalog

Source file: en/03-newsletter-engine/.claude/skills/newsletter-engine/skill.md in revfactory/harness-100
Installs to: ~/.claude/skills/newsletter-engine
Collection: One of 51 skills cataloged from this repository
Category: AI Engineering — 3670 skills

What Newsletter Engine does

A multi-agent system that orchestrates the full newsletter creation pipeline: curation, copywriting, A/B testing, editing, and quality review. Use for automated newsletter generation with a team of AI agents.

Newsletter Engine is cataloged under AI Engineering on DirSkills.

Documentation

README

Excerpt

An agent team collaborates to produce newsletters through the pipeline of curation → writing → A/B testing → editing → publishing, all at once.

Execution Mode

Agent Team — 5 members communicate directly via SendMessage and cross-validate each other's work.

This is the opening of the README. Read the full README on GitHub.

Commands Newsletter Engine provides

Slash commands named in this skill’s SKILL.md, listed in the order they first appear.

/email-copywriting
/audience-segmentation
/deliverability-optimization

Frequently asked about Newsletter Engine

What else does revfactory publish alongside Newsletter Engine?
Newsletter Engine is one of 51 skills that DirSkills catalogs from revfactory/harness-100, the repository it ships in. Its siblings there include Ad Copywriting Formulas, Advertising Campaign and Argumentation Framework. Each one is a separate skill with its own page in this directory, installs the same way Newsletter Engine does, and is maintained by revfactory in that same repository. The rest of the collection is listed on the revfactory/harness-100 page.
How does Newsletter Engine compare to other AI Engineering skills?
Newsletter Engine ranks #1166 by stars among the 3670 AI Engineering skills in this catalog. The most-starred ones next to it are Architecture Decision Records, AI-First Engineering and Agentic OS. DirSkills ranks by the star count of the repository each skill ships in, so that order reflects how popular those repositories are rather than any review of Newsletter Engine against them. Open each page to compare what they document and how they install.