Relaunch Behavior
Users will keep opening tools from Windows Terminal profiles, IDE tasks, and muscle-memory pwsh/bash sessions.
Forcing them to remember "open a nu shell first" is friction.
If nu is on PATH, hopping into Nushell for that one command is the polite default:
$ myCLItool status Nushell is installed, but this shell is not Nushell. Relaunching inside Nushell… (... tool runs under nu ...)
The tool still requires Nushell as the real host; it does not pretend bash/pwsh are supported runtimes.
Detection and quoting heuristics will harden over time. Early scaffold status — see the repository README for current readiness.