jongio/skills

Jon Gallant's collection of skills for AI coding agents — works with GitHub Copilot, Claude, Codex, and any agent that supports the SKILL.md format. A general-purpose monorepo: each skill lives in its own folder under skills/ and can be installed individually or all at once.

Skills

Skill	What it does
create-canvas-app	Build GitHub Copilot App canvas extensions fast — a no-build Preact + htm kit with live SSE state, durable storage, Primer theming, official GitHub Lucide icons, deep links into the app, a generator, and an installable skill.
create-gh-pages-site	Scaffold a working GitHub Pages site from a vetted template (static, Astro, React + Vite, Eleventy, or Jekyll) into your current repo by default — injects the correct base path for the target repo, wires the official GitHub Actions Pages deploy workflow, sets the repo's Website link, and shows how to enable Pages.

A skill is invoked straight from the Copilot composer — here create-canvas-app turns a one-line prompt into a working canvas:

Install

Uses the vercel-labs/skills CLI (skills.sh) — note the binary is skills (plural).

# List the skills available in this repo:
npx skills add jongio/skills --list

# Install one skill globally for GitHub Copilot:
npx skills add jongio/skills --skill create-canvas-app -g --agent github-copilot

# Install into the current project instead of globally (drop -g):
npx skills add jongio/skills --skill create-canvas-app

# Install every skill in the repo:
npx skills add jongio/skills --all

# Pin to a branch or tag:
npx skills add jongio/skills#main --skill create-canvas-app

After any install, reload skills with /skills reload or start a new session. Each skill is then available as /<skill-name> (e.g. /create-canvas-app).

Add as a marketplace, or install as a plugin

jongio/skills also plugs into the GitHub Copilot plugin system (works in both the Copilot app and the Copilot CLI). There are two ways to use it.

Add it as a marketplace — browse and install individual skills. The repo ships a root marketplace.json that indexes its skills:

# Register the marketplace:
copilot plugin marketplace add jongio/skills

# See what's available:
copilot plugin marketplace browse jongio-skills

# Install one skill from it (form: <plugin>@<marketplace>):
copilot plugin install create-canvas-app@jongio-skills

In the Copilot app — no commands needed:

1. Open Settings and select Plugins.

   

2. Click Install ▾ → Add marketplace, enter jongio/skills, and click Add marketplace.

   

3. The marketplace's skills appear grouped under jongio-skills — click Install on the one you want.

   

4. The skill installs and is enabled, ready to use right away.

   

Or install the whole repo as a single plugin — gets every skill under skills/ at once (uses the root plugin.json):

copilot plugin install jongio/skills

Layout

marketplace.json             Copilot marketplace manifest (indexes skills as plugins)
plugin.json                   Copilot plugin manifest (skills: "skills/")
skills/
  create-canvas-app/          One self-contained skill
    SKILL.md                  Authoring contract the agent reads
    README.md                 Human docs for the skill
    kit/  reference/  scripts/  test/  docs/

Add a new skill by creating skills/<name>/SKILL.md (plus any bundled assets in the same folder); the skills CLI auto-discovers it.

License

MIT — see skills/create-canvas-app/LICENSE.