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. Experimental skills live in https://github.com/openai/skills/tree/main/skills/.experimental and can be installed the same way.

When to Use

The user asks what skills are installable or needs a specific skill installed (curated, experimental, or external).
They provide a GitHub repo/path or curated name and expect Skill Installer to handle the download/install process.
You are managing Codex skills and need to list, install, or document the results.

When NOT to Use

The request has nothing to do with skills (general programming, documentation, design tasks).
The skill already exists in $CODEX_HOME/skills and no installation is necessary.
You're modifying a skill instead of installing a new one.

Use the helper scripts based on the task:

List skills when the user asks what is available, or if the user uses this skill without specifying what to do. Default listing is .curated, but you can pass --path skills/.experimental when they ask about experimental skills.
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 skills, output approximately as follows, depending on the context of the user's request. If they ask about experimental skills, list from .experimental instead of .curated and label the source accordingly: """ Skills from {repo}:

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

After installing a skill, tell the user: "Restart Codex 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-skills.py (prints skills list with installed annotations)
scripts/list-skills.py --format json
Example (experimental list): scripts/list-skills.py --path skills/.experimental
scripts/install-skill-from-github.py --repo <owner>/<repo> --path <path/to/skill> [<path/to/skill> ...]
scripts/install-skill-from-github.py --url https://github.com/<owner>/<repo>/tree/<ref>/<path>
Example (experimental skill): scripts/install-skill-from-github.py --repo openai/skills --path skills/.experimental/<skill-name>

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.
Installs into $CODEX_HOME/skills/<skill-name> (defaults to ~/.codex/skills).
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.

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 $CODEX_HOME/skills.