# Compatibility alias: /gstack-upgrade This is not a public/discoverable skill. Route the legacy invocation to `$ship --mode Prepare --module gstack-upgrade`, then read [the preserved module](../skills/ship/references/legacy/gstack-upgrade.md) in full. - Tree: `ship` - Public mode: `Prepare` - Legacy internal alias: `upgrade` - Dispatcher role: `internal` - Mandatory specialist input: `false`