Or maybe only 15?

Looks like it's failing applying the terminal profile settings:

The domain/default pair of (com.apple.terminal, Default Window Settings) does not exist

I haven't yet upgraded to macOS 15 on my laptop :O

This line, in particular: https://github.com/geerlingguy/mac-dev-playbook/blob/master/tasks/terminal.yml#L4

For debugging, could run:

for i in `defaults domains | tr ',' '\n'`; do echo "********* READING DEFAULT DOMAIN $i **********"; echo; defaults read $i; done

From: https://apple.stackexchange.com/a/195290/17366 — grab the list and find Terminal and see what it might be now. Could just make that an optional task.