From my recent experience doing a project that involved setting up AWS infrastructure with CloudFormation - a VPC, subnets, docker based lambda s, SNS, SQS, etc - and the code on top of it, it did perfectly with code but took some going back and forth with infrastructure as code

The first thing I did was keep everything as decoupled as possible with so it would be simple for Codex and Claude Code (I use both) to reason over. I work the same way when setting up my own repos.

I treat Codex/Claude as junior developers and I keep my hands on the wheel

LOC doesn’t matter if you have clean modularity