Skills Catalog — 21 Open-Source AI Agent Skills
TL;DR: The repository has 21 open-source skills under Apache 2.0 license, covering business, marketing, design, DevOps, frontend, cloud, career, automation, privacy, security, knowledge, and AI agent compatibility. All reviewed following the Anthropic standard.
Available Skills
Section titled “Available Skills”| Skill | Category | Description |
|---|---|---|
| Startup Idea | Business | Complete startup analysis (Paul Graham + Dan Koe + Seth Godin) |
| Revenue-Centric Design | Business | 101 evidence-backed principles for converting, retaining, and monetizing SaaS |
| GEO Optimization | Marketing | Optimization for generative engines (LLMs) |
| Substack Expert | Marketing | Formatting, SEO, and growth on Substack |
| Pier Cloud API | Cloud/FinOps | Pier Cloud (Lighthouse) API consumption |
| Ultimate Design System Master | Design | Apple/Vercel/Figma-level design systems |
| Coolify Operator | DevOps | Master operator for the Coolify platform |
| Resume ATS Beater | Career | Resume rewriting for ATS compatibility |
| Agent Ready — Cloudflare | AI Agents | Website audit for AI agent compatibility |
| Auth.md | AI Agents | Open protocol for AI agents to register for services |
| OKF — Open Knowledge Format | Knowledge | Create, validate, and enrich OKF bundles — the “LLM Wiki” pattern as a spec |
| Ralph Loop for Kiro Specs | Automation | Self-correcting iterative runner for Kiro specs |
| Loop Architect | Automation | Agent loop design coach with cross-model review gates and portable artifacts |
| LGPD Check | Privacy | ⚠️ Migrated → lgpd-app/skills |
| LGPD.md | Privacy | ⚠️ Migrated → lgpd-app/skills |
| Humanizar | Writing | Rewrite PT-BR text to remove AI slop and restore human voice |
| Human-AI | Writing | Rewrite EN text with 43 patterns, iterative scoring and measure.py — companion to Humanizar |
| Astro Sites Manager | DevOps | Build, migrate, and maintain Astro v7 projects — deploy to 8+ platforms |
| Security Specialist | Security | Security audit with 6-phase pipeline, 9 attack classes and adversarial validation |
| DESIGN.md Validator | Design | Validate DESIGN.md against Google spec — lint, diff, export, WCAG |
| Skill Evaluation | Quality | Evaluate skills against 12 criteria (Anthropic + agentskills.io) — scorecard + grade |
| LGPD Check | Privacy | Audit websites for LGPD compliance — 6 modules, score, priority fixes |
| LGPD.md | Privacy | Generate and validate lgpd.md files — LGPD compliance declaration standard |
Quick Install
Section titled “Quick Install”# All skillsnpx skills add https://github.com/fabricioctelles/skills
# Specific skillnpx skills add https://github.com/fabricioctelles/skills -s <skill-name>Contributing
Section titled “Contributing”To add a new skill to the catalog, check the skill structure and open a pull request on the GitHub repository.
Repository Statistics
Section titled “Repository Statistics”- 21 skills available and documented
- 100% reviewed following the Anthropic standard for Agent Skills
- Apache 2.0 License — free to use in any project
- 5+ agents compatible: Kiro, Cursor, Windsurf, Claude Code, and others
- Created by Fabricio Telles — updated June 2026
According to Anthropic, structured skills improve agent response quality by up to 40% compared to ad-hoc prompts.
Frequently Asked Questions
Section titled “Frequently Asked Questions”How many skills are available?
Section titled “How many skills are available?”The repository currently has 21 open-source skills covering areas like business, digital marketing, interface design, DevOps and deployment, frontend development, cloud infrastructure, professional career, automation, privacy, knowledge, and AI agent compatibility. All were reviewed following the Anthropic standard.
Are the skills free?
Section titled “Are the skills free?”Yes, all 21 skills are 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 from any developer worldwide.
How to contribute a new skill?
Section titled “How to contribute a new skill?”Check the skill structure reference in the documentation to understand the standard format with SKILL.md, references, and evals directories. Then open a pull request on the GitHub repository at github.com/fabricioctelles/skills with your skill following the Anthropic standard for Agent Skills.