I would like the option to disallow reading of certain files. For example, in an HTML, CSS, and JS Repl, the JS coder doesn't "need" to see the CSS, and vice versa. Or maybe I don't want someone seeing the server-side code, and only see the file that the server is supposed to send, and vice versa. Like after all, we bought the hacker plan for a reason.

Also, we can we have control over who can run the program? Maybe someone is trying to debug and someone else just cancels and reruns it.

Maybe creating read-only sections or creating writable sections for certain people so everyone doesn't have access to everything.

Yes and maybe commands like /mute - mute person and /clear - clear chat.

Multiplayer version control system maybe?

Maybe a "update code" button so you can progress the code and have something to revert to in case any unsavory user attempts to delete everything?

That way everyone can have read-write privileges but only the owner manages the version control.

When is this going to be complete? It would be really helpful!

Not sure if this is related or should be a new post but you should be able to see a changelog (who did what)

Have permissions where you can enable/disable someones write permission and access to a file.

This would be very helpful as people just come on and delete your work