Pattern: Vibe Coding Builds Verification Blindness — Developers Stop Understanding Their Own Codebases

r/SaaS·medium signal

A viral r/SaaS thread (144 upvotes, 55 comments) documents the verification blindness pattern: developer shipped an MVP in 3 days with Claude, then spent 4 hours prompting through an auth bug and realized they no longer understood what their code did. This is the same pattern Addy Osmani's '80% problem' describes — AI lowers the floor for initial velocity while dramatically raising the ceiling for debugging cost when things break.