# gh extension > Manage extensions for the GitHub CLI. > More information: . - Initialize a new GitHub CLI extension project in a directory of the same name: `gh extension create {{extension_name}}` - Install an extension from a GitHub repository: `gh extension install {{owner}}/{{repository}}` - List installed extensions: `gh extension list` - Upgrade a specific extension: `gh extension upgrade {{extension_name}}` - Upgrade all extensions: `gh extension upgrade --all` - List installed extensions: `gh extension list` - Remove an extension: `gh extension remove {{extension_name}}` - Display help about a subcommand: `gh extension {{subcommand}} --help`