This is Excellent! Thanks for sharing.

First off, i highly suggest that you expand this into a full-blown book. This could become a successor to a combination of {Adrian & Piotr's "Software Architecture with C++" + Fedor Pikus' "The Art of Writing Efficient Programs"} for the Agentic era.

I really like that you are using Lean4 for parts of code generation, tips for Agentic coding etc. which are all needed today. I myself have been thinking on these lines i.e. using formal methods for specification and verification so that agent-generated code can be "correct-by-construction" and efficient. Your write-up is the first i have seen which tries to provide the overall picture.