Yes
it took Codex less than an hour to recover the feature set I had implemented but on the new backend
orbifold on Hacker News
less than an hour
In the thread “RISC-V: They Should Have Known Better”, replying to this comment
Helped: Long time fork maintenance and tedious backend work.
Maintining this type of long time fork is the kind of mind numbing, tedious thing LLMs are actually exceptionally good at. I did some backend work on Lean4 compiler and then they switched out parts of the codegen, it took Codex less than an hour to recover the feature set I had implemented but on the new backend.