Yes
Just shit that would've taking years previously, is achievable in under a month
0000000000100 on Hacker News
10-20k LOC
In the thread “Agent Skills”, replying to this comment
Helped: Using agents to refactor messy legacy codebases and port storefronts.
Got in the way: Over-engineering skills with LLM junk or confusing rules.
… With the use of Claude / Codex I was able to port over the vast majority of the existing legacy storefront and laid the groundwork for centralizing the 10-20k LOC mega-controller logic over to reusable repo/service patterns. Just shit that would've taking years previously, is achievable in under a month.