gh skill (multi-host) ​

The same SKILL.md files that the Claude Code plugin ships are Agent Skills standard. gh skill (GitHub CLI v2.90+) can install them into any host that honors the spec.

Who should read this ​

Pick gh skill over the Claude plugin tutorial if:

• You use GitHub Copilot, Cursor, Gemini CLI, or OpenAI Codex (with or without Claude Code alongside).
• You want to pin to a specific git tree SHA so updates are explicit.
• You prefer the gh workflow to the Claude marketplace flow.

Prerequisites ​

• GitHub CLI v2.90.0 or later (gh --version).
• The host you're targeting installed and working (Copilot / Cursor / Gemini / Codex / Claude Code).

Verify:

gh --version         # must be ≥ 2.90.0
gh skill --help      # the skill subcommand should list install / update / preview / search / publish

Install the three skills ​

Each skill is installed independently so you can choose which ones you want. Typical full set:

gh skill install ideamans/chartjs2img plugins/chartjs2img/skills/chartjs2img-render   --agent claude-code
gh skill install ideamans/chartjs2img plugins/chartjs2img/skills/chartjs2img-author   --agent claude-code
gh skill install ideamans/chartjs2img plugins/chartjs2img/skills/chartjs2img-install  --agent claude-code

--agent can be any of claude-code, copilot, cursor, gemini, codex. Run the same command multiple times with different --agent values to install the skill into multiple hosts.

Check what's installed:

gh skill list

Skill bundle overview ​

Same three skills as the Claude Code plugin, so content doesn't drift:

Need deeper option tables for a specific plugin? chartjs2img llm (the CLI subcommand) prints the full ~1400-line reference — pipe all of it or one ## <plugin> section into the agent as needed.

Each has standards-compliant frontmatter (name, description, license, compatibility, allowed-tools) only — see the Agent Skills spec. No Claude-only fields are used, so a skill installed to Copilot behaves the same as one installed to Claude Code.

Provenance via frontmatter ​

gh skill install writes three fields into the SKILL.md copy it places in your host's skill directory:

• repository: ideamans/chartjs2img
• ref: main (or the specific ref you pinned)
• a tree SHA of plugins/chartjs2img/skills/<name> at install time

That tree SHA is how gh skill update detects changes — you don't need a version bump on our side. Any change to the skill body flows through on gh skill update.

Updating ​

gh skill update            # updates all installed skills
gh skill update chartjs2img-render    # one by name

Pinning to a specific version ​

By default gh skill install pins to the current main tree SHA. If you want a specific release:

gh skill install ideamans/chartjs2img plugins/chartjs2img/skills/chartjs2img-render \
  --ref v0.7.1 \
  --agent claude-code

Replace v0.7.1 with the chartjs2img tag you want. gh skill update won't move you off a pinned ref unless you explicitly unpin.

What you can't do with gh skill ​

• gh skill doesn't install the chartjs2img CLI binary itself. Run /chartjs2img-install from your host after installation, or use one of the install paths in the main Install guide.
• gh skill doesn't orchestrate skills across hosts. If you want the same skill in multiple agents, run gh skill install once per --agent.

Verifying the install ​

In your agent host, invoke any of the three skills — e.g. /chartjs2img-render. It should return the skill body without a "skill not found" error.

If a skill isn't found, check gh skill list then look at the host- specific skill directory (Claude Code: ~/.claude/skills/; others documented by the host).

See also ​

• Claude Code plugin — alternative install path.
• CLI reference — what chartjs2img llm returns.
• Agent Skills spec — the open standard the skills implement.