Cross-agent skills · GitHub Copilot · Claude · Codex
Jon Gallant's collection of skills for AI coding agents. Each skill lives in its own folder and installs individually or all at once — works with any agent that supports the SKILL.md format.
npx skills add jongio/skills --all
Build GitHub Copilot canvas extensions fast — a no-build Preact + htm kit with live SSE state, durable per-user storage, optional multiplayer state shared through a private GitHub repo, Primer theming, the official Lucide icon set, a one-command generator, and deep links into the app.
Scaffold a working GitHub Pages site from a vetted template (static, Astro, React + Vite, Eleventy, or Jekyll) — the correct base path, the official GitHub Actions deploy, and content authored from your repo.
Create and register a complete portable agent skill with tests, Vally evals, catalog metadata, and optional validated thumbnail art.
Create or safely upgrade a complete cross-agent skills marketplace repository with manifests, Vally, secure CI, Dependabot, and a GitHub Pages catalog.
Scaffold and maintain the standard community health files every GitHub repository needs: .gitignore, .gitattributes, LICENSE, CONTRIBUTING, issue templates, CI workflows, dependabot, editorconfig, and repo metadata.
Interactive naming assistant for projects, CLIs, and products — generates diverse candidate names, learns your preferences, validates availability across domains, GitHub, package registries, and social handles, and screens for trademark and existing-business collisions.
Audit DNS, web routing, TLS, mail authentication, and takeover exposure, then apply exact provider changes only after explicit approval.
Turn the code, error, design, or idea already in context into a clear mental model without losing accuracy, nuance, or safety.
Audit, update, and secure dependencies across every package manager in a repo, without ever opening an empty dependency pull request.
Review Git work by content, then safely decide what to remove, keep, resume, update, or merge.
No skills match your search.
Pick whichever fits your setup.
In Copilot (or any agent that supports plugins), just say:
install jongio/skillsnpx skills add jongio/skills --list
npx skills add jongio/skills --skill create-canvas-app -g --agent github-copilotFrom the CLI:
copilot plugin marketplace add jongio/skills
copilot plugin install create-canvas-app@jongio-skillsOr in the Copilot app, no commands needed:
jongio/skills, and click Add marketplace.
copilot plugin install jongio/skillshttps://github.com/jongio/skills as a plugin source.jongio/skills as a marketplace, then install jongio-skills@jongio-skills.jongio/skills as a marketplace.gemini extensions install https://github.com/jongio/skills.npx skills add jongio/skills.ChatGPT web and mobile require public directory review. The Codex IDE extension accepts standalone skills but not plugins. See the complete support matrix.
After any install, reload with /skills reload or start a new session.