Looks good, works as expected in both interactive and when providing params along with generate-config.

One gripe is that when the suggestion is shown in the interactive (in the case of a service name conflict), the message disappears as soon as you start typing. More ideally, I feel like the message would persist while the user types or allow accepting the suggestion with a key press. But for now, I reckon this is a great improvement and in most cases just about any change the user makes will lead to avoiding a naming conflict.

Could also add testing.