alffei/skill-installer

Skill Installer

Helps install skills. By default these are from https://github.com/openai/skills/tree/main/skills/.curated, but users can also provide other locations.

Use the helper scripts based on the task:

• List curated skills when the user asks what is available, or if the user uses this skill without specifying what to do.
• Install from the curated list when the user provides a skill name.
• Install from another repo when the user provides a GitHub repo/path (including private repos).

Install skills with the helper scripts.

Communication

When listing curated skills, output approximately as follows, depending on the context of the user's request: """ Skills from {repo}:

1. skill-1
2. skill-2 (already installed)
3. ... Which ones would you like installed? """

After installing a skill, tell the user: "Restart Antigravity to pick up new skills."

Scripts

All of these scripts use network, so when running in the sandbox, request escalation when running them.

• scripts/list-curated-skills.py (prints curated list with installed annotations)
• scripts/list-curated-skills.py --format json
• scripts/install-skill-from-github.py --repo <owner>/<repo> --path <path/to/skill> [--global]
• scripts/install-skill-from-github.py --url https://github.com/<owner>/<repo>/tree/<ref>/<path> [--global]

Behavior and Options

• Defaults to direct download for public GitHub repos.
• If download fails with auth/permission errors, falls back to git sparse checkout.
• Aborts if the destination skill directory already exists.
• Default Location: Installs into the workspace-specific skills directory <workspace-root>/.agent/skills/<skill-name>.
• Global Location: Use the --global flag to install into the global directory ~/.gemini/antigravity/skills/<skill-name>.
• Multiple --path values install multiple skills in one run, each named from the path basename unless --name is supplied.
• Options: --ref <ref> (default main), --dest <path>, --method auto|download|git, --global.

Notes

• Curated listing is fetched from https://github.com/openai/skills/tree/main/skills/.curated via the GitHub API. If it is unavailable, explain the error and exit.
• Private GitHub repos can be accessed via existing git credentials or optional GITHUB_TOKEN/GH_TOKEN for download.
• Git fallback tries HTTPS first, then SSH.
• The skills at https://github.com/openai/skills/tree/main/skills/.system are preinstalled, so no need to help users install those. If they ask, just explain this. If they insist, you can download and overwrite.
• Installed annotations come from both the global skills directory ~/.gemini/antigravity/skills and current workspace skills directory <workspace-root>/.agent/skills.