No it used to rely heavily on Aider and it kind of became obsolete. The agent reads/writes files directly now instead of having aider do it. Its a bit faster and lower token costs.

The great thing about RA.Aid is that it automatically iterates until the plan is fully complete. It also finds the files itself - aider doesn't really do that. I still do use aider for concise editing but RA.Aid is excellent for larger changes that require many iterations.