Best Free AI Skills and Agent Capabilities

Senior .NET architect for complex delivery: designs .NET 6+ systems, decides between parallel subagents and orchestrated

Arquitecto de Soluciones Principal y Consultor Tecnológico de Andru.ia. Diagnostica y traza la hoja de ruta óptima para

Security audit, hardening, threat modeling (STRIDE/PASTA), Red/Blue Team, OWASP checks, code review, incident response,

Ingeniero de Sistemas de Andru.ia. Diseña, redacta y despliega nuevas habilidades (skills) dentro del repositorio siguie

Estratega de Inteligencia de Dominio de Andru.ia. Analiza el nicho específico de un proyecto para inyectar conocimientos

2D game development principles. Sprites, tilemaps, physics, camera.

AI-powered presentation generation via the 2slides API — create slides from text, match a reference image style, summari

3D game development principles. Rendering, shaders, physics, cameras.

Expert in building 3D experiences for the web - Three.js, React Three Fiber, Spline, WebGL, and interactive 3D scenes. C

Comprehensive web accessibility standards based on WCAG 2.2 AA, with 38+ anti-patterns, legal enforcement context (EAA,

Structured guide for setting up A/B tests with mandatory gates for hypothesis, metrics, and execution readiness.

Use when a coding task should be driven end-to-end from issue intake through implementation, review, deployment, and acc

You are an accessibility expert specializing in WCAG compliance, inclusive design, and assistive technology compatibilit

Expert assistant for web accessibility (WCAG 2.1/2.2), inclusive UX, and a11y testing

Runtime accessibility specialist for keyboard flows, focus management, dialog behavior, form errors, and evidence-backed

Find and fix WCAG 2.2 accessibility issues. Two modes — report (sweep a codebase or page, produce a prioritized written

Diff a live page's accessibility violations against a baseline — by default compares uncommitted changes (stash-based),

Audit a live page for accessibility issues, locate each WCAG violation precisely, and return a selector-grounded fix wor

Use this skill when the user explicitly asks to map, document, or onboard into an existing codebase. Trigger for prompts

Run the AgentRC readiness assessment on the current repository and produce a static HTML dashboard at reports/index.html

Generate tailored AI agent instruction files via AgentRC instructions command. Produces .github/copilot-instructions.md

Help the user pick, write, or apply an AgentRC policy. Policies customise readiness scoring by disabling irrelevant chec

This skill should be used when the user asks to \"attack Active Directory\", \"exploit AD\", \"Kerberoasting\", \"DCSync

Automate ActiveCampaign tasks via Rube MCP (Composio): manage contacts, tags, list subscriptions, automation enrollment,

Optimize ad copy for Google Ads, Facebook/Instagram Ads, and other platforms with AI. Improve click-through rates, reduc

Create, iterate, and scale paid ad creative for Google Ads, Meta, LinkedIn, TikTok, and similar platforms. Use when gene

Add educational comments to the file specified, or prompt asking for file to comment if one is not provided.

Use when you need to address review or issue comments on an open GitHub Pull Request using the gh CLI.

Fetch any X/Twitter post as clean LLM-friendly JSON. Converts x.com, twitter.com, or adhx.com links into structured data

Write, debug, and optimize Adobe Illustrator automation scripts using ExtendScript (JavaScript/JSX). Use when creating o