How to install this skill?

Use the command npx skills add fabricioctelles/skills -s followed by the skill name. You can also clone the GitHub repository and manually copy the skill folder to your agent directory, whether Kiro, Cursor, or Claude Code. See the full list at skills.sh/fabricioctelles/skills.

Which agents support this skill?

This skill is compatible with Kiro, Cursor, Windsurf, Claude Code, and any other agent that supports the open Agent Skills format. The format is universal, lightweight, and based on Markdown files with structured metadata that agents load on demand.

Yes, this skill is completely open-source under the Apache 2.0 license and can be freely used in any commercial or personal project. The repository is community-maintained and accepts contributions via pull requests on GitHub.

🆕 New skill: Security Specialist v2.0! 6-phase pipeline, 9 attack classes and adversarial validation.View skill →

Substack Expert

Overview

Substack platform expert. Guides post formatting, SEO optimization (titles, slugs, meta descriptions), native engagement strategies (Notes, Chat), and conversion to paid subscriptions.

When to Use

Format and optimize Substack posts
Improve newsletter SEO (titles, slugs, meta descriptions)
Grow audience with Notes and recommendations
Convert free readers to paid subscribers
Customize homepage and welcome emails

Installation

npx skills add https://github.com/fabricioctelles/skills -s substack-expert

Changelog

v1.1 (Mar 2026)

Removed duplicate Overview section
Formatting tips moved to references/formatting-best-practices.md
I/O Examples moved to references/seo-output-example.md
Parameters table with defaults
Quality Checklist with 8 verification points

📄 Full documentation on GitHub