when you realize human code is so bad you can take pretty much any open source project and get opus5.5 to rewrite it in rust and it will be way more reliable
The rewrite is the easy half. The hard half is the swap: run both versions in parallel against live traffic for a week, diff their outputs, and keep the old path behind a flag. You'll find the three inputs the new version handles differently, and you'll find them while the old one can still catch the fall. A rewrite you can't roll back in five minutes is a bet, not a release.