Yes, all 23 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.

🆕 New skill: Pstack Skill! Lauren Tan's rigorous engineering orchestrator — 23 playbooks, 21 procedures, and 21 principles in a single skill for any agent.View skill →

Skills Catalog — 23 Open-Source AI Agent Skills

TL;DR: The repository has 23 open-source skills covering business, marketing, writing, design, DevOps, cloud, quality, career, automation, security, knowledge, and AI agent compatibility. All reviewed following the Anthropic standard. 4 skills support TypeSafe Jev integration for calibrated probability assessments. Most are Apache 2.0, with four license exceptions — see the table below.

Available Skills

#	Skill	Category	Description
1	Startup Idea	Business	Complete startup analysis (Paul Graham + Dan Koe + Seth Godin)
2	Revenue-Centric Design	Business	101 evidence-backed principles for converting, retaining, and monetizing SaaS
3	GEO Optimization	Marketing	Optimization for generative engines (LLMs)
4	Substack Expert	Marketing	Formatting, SEO, and growth on Substack
5	Motion Ad	Marketing	15s motion-graphics ad rendered to MP4 — page-anchored claims, real imagery, GSAP timeline
6	Humanizar	Writing	Write and rewrite PT-BR text without AI tics — 13 voice profiles, false-positive guard, factual lock, and Jev integration
7	Human-AI	Writing	Rewrite EN text with 43 patterns, iterative scoring, `measure.py`, and Jev integration
8	Pier Cloud API	Cloud/FinOps	Pier Cloud (Lighthouse) API consumption
9	Coolify Operator	DevOps	Master operator for the Coolify platform
10	Astro Sites Manager	DevOps	Build, migrate, and maintain Astro v7 projects — deploy to 8+ platforms
11	Security Specialist	Security	Security audit with 6-phase pipeline, 9 attack classes and adversarial validation
12	Ultimate Design System Master	Design	Apple/Vercel/Figma-level design systems
13	DESIGN.md Validator	Design	Validate DESIGN.md against Google spec — lint, diff, export, WCAG
14	Skill Evaluation	Quality	Evaluate skills against 12 criteria (Anthropic + agentskills.io) — scorecard + grade
15	Slop Eval	Quality	Evaluate UI/web design against anti-slop law — 8 axes, Slop Index 0–100, CI gate, and Jev integration
16	Agent Plugin Eval	Quality	Audit portable Agent Plugins — 18 criteria, PASS/PARTIAL/FAIL gate, static-only audit, and Jev integration
17	Agent Ready — Cloudflare	AI Agents	Website audit for AI agent compatibility
18	Auth.md	AI Agents	Open protocol for AI agents to register for services
19	Pstack Skill	AI Agents	⭐ Rigorous engineering orchestrator ported from Lauren Tan’s pstack — 23 playbooks, 21 procedures, any agent
20	OKF — Open Knowledge Format	Knowledge	Create, validate, and enrich OKF bundles — the “LLM Wiki” pattern as a spec
21	Ralph Loop for Kiro Specs	Automation	Self-correcting iterative runner for Kiro specs
22	Loop Architect	Automation	Agent loop design coach with cross-model review gates and portable artifacts
23	Resume ATS Beater	Career	Resume rewriting for ATS compatibility

Retired Skills

These left the repository because the original project started offering something more complete. The pages stay online pointing at the official source.

Skill	Replaced by
Front-End Checklist	thedaviddias/Front-End-Checklist — 385 skills, one per rule
Website Spec	The official specification.website skill — 140+ topics, live updates via MCP
LGPD Check	lgpd-app/skills
LGPD.md	lgpd-app/skills

Quick Install

# All skills
npx skills add https://github.com/fabricioctelles/skills

# Specific skill
npx skills add https://github.com/fabricioctelles/skills -s <skill-name>

Contributing

To add a new skill to the catalog, check the skill structure and open a pull request on the GitHub repository.

Repository Statistics

23 skills available and documented
100% reviewed following the Anthropic standard for Agent Skills
Mostly Apache 2.0 — with four exceptions, see the license table below
5+ agents compatible: Kiro, Cursor, Windsurf, Claude Code, and others
Created by Fabricio Telles — updated September 2026

According to Anthropic, structured skills improve agent response quality by up to 40% compared to ad-hoc prompts.

Licenses

The repository is Apache 2.0, but four skills carry their own terms. Check before using them in production or in a paid service:

Skill	License	Restriction
Revenue-Centric Design	Source-available	Attribution to the original author required; gambling/betting use prohibited
Motion Ad	CC BY-NC 4.0	Non-commercial use — free to use and remix, not to sell
Coolify Operator	MIT	—
Loop Architect	MIT	—

The remaining 19 skills are Apache 2.0.

Frequently Asked Questions

How many skills are available?

The repository currently has 23 open-source skills covering areas like business, digital marketing, writing, interface design, DevOps and deployment, cloud infrastructure, quality, professional career, automation, security, knowledge, and AI agent compatibility. All were reviewed following the Anthropic standard.

Are the skills free?

Yes. Most are open-source under the Apache 2.0 license and can be used freely in any project. Four skills have their own terms: Revenue-Centric Design is source-available with attribution required and prohibits gambling use; Motion Ad is CC BY-NC 4.0 and does not allow commercial use; Coolify Operator and Loop Architect are MIT. See the license table. The repository is community-maintained and accepts contributions via pull requests on GitHub from any developer worldwide.

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.