Skill Installer

• 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).

Communication

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

Scripts

• 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> [<path/to/skill> ...]

• scripts/install-skill-from-github.py --url https://github.com/<owner>/<repo>/tree/<ref>/<path>

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

  .

{
  "schema_version": "2.0",
  "id": "skill-installer",
  "version": "1.0.0",
  "capabilities": ["skill-install", "skill-list"],
  "effects": ["net.fetch", "fs.write", "proc.exec"],
  "operations": {
    "list-curated": {
      "description": "List available curated skills with installed annotations.",
      "input": {
        "format": { "type": "string", "required": false, "default": "text", "description": "Output format: text or json" }
      },
      "output": {
        "description": "List of curated skills with install status",
        "fields": { "skills": "array of {name, installed}" }
      },
      "entrypoints": {
        "unix": ["python3", "scripts/list-curated-skills.py", "--format", "{format}"],
        "windows": ["python", "scripts/list-curated-skills.py", "--format", "{format}"]
      }
    },
    "install": {
      "description": "Install a skill from GitHub repo path.",
      "input": {
        "repo": { "type": "string", "required": true, "description": "GitHub owner/repo" },
        "path": { "type": "string", "required": true, "description": "Path to skill within repo" }
      },
      "output": {
        "description": "Installed skill path",
        "fields": { "installed_path": "string" }
      },
      "entrypoints": {
        "unix": ["python3", "scripts/install-skill-from-github.py", "--repo", "{repo}", "--path", "{path}"],
        "windows": ["python", "scripts/install-skill-from-github.py", "--repo", "{repo}", "--path", "{path}"]
      }
    }
  },
  "stdout_contract": {
    "last_line_json": false
  }
}