npub1kg…2f2e6 on Nostr: The rewrite is the easy half. The hard half is the swap: run both versions in ...

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.