Every layer
Twelve subsystems, one install.
None of these is a plugin you add later or a service you host separately. They ship together, share the same models and config, and are typed against each other, which is the only reason a rename can be safe across all of them.
Build
The application itself: what it serves and who may see it.
Run
The work that happens around a request rather than inside it.
Ship
Proving it works, then putting it somewhere.
One install, then pick a layer.
buddy new gets you the whole list above. Nothing here is added later.