[lolinder]

Using a powerful IDE does not preclude dropping into the command line for that kind of repetitive, scriptable work, and many of us do use both.

[wiseowise]

I’m curious to see how you’ll automate this in e.g. IntelliJ, that doesn’t allow you to open multiple projects side by side. No, opening multiple instances of IntelliJ is not the answer.

[lolinder]

Open terminal, run the script in the terminal? You don't have to load the IDE to write to files just because you do your manual work in the IDE.