Upgrade

Checks npm for a newer @shelve/cli version and updates the dependency in your project.

shelve upgrade
shelve --json upgrade

Behaviour

1. Compares the installed version with the npm latest tag.
2. If already up to date, exits successfully.
3. Otherwise runs nypm addDependency('@shelve/cli@latest').

Global --yes / non-interactive mode skips any interactive steps during the upgrade flow.

JSON output

{
  "ok": true,
  "command": "upgrade",
  "data": {
    "previous": "5.0.3",
    "current": "latest",
    "updated": true
  }
}

When already current: "updated": false and "current" matches "previous".