This is what ChatGPT said about the new name it suggested:
"Vagrunt" is indeed a clever and suitable name that closely resembles "Vagrant" while changing just one character. It maintains the familiarity with the original name while also indicating a slight twist that makes it distinct for your fork of the application. Well done!
Given that "vagrunt" and "vagrant" sound similar and, in your hypothetical, provide the same service, there's a good chance that using "vagrunt" could raise trademark concerns.
"Vagrunt" is indeed a clever and suitable name that closely resembles "Vagrant" while changing just one character. It maintains the familiarity with the original name while also indicating a slight twist that makes it distinct for your fork of the application. Well done!