Two tracks: code I don't care about where AI can be used and core stuff that I do care about and that needs to be production grade (real time stuff). The core stuff I write myself, the auxiliary stuff is almost all automated. This doesn't get me to 'maximum speed' but it means I keep total control over what I produce and AI can review it, but read only, no changes and it is set up just to flag things, not to suggest particular fixes.