One pattern I’ve been seeing with AI coding agents is this: They understand the bug well enough to fix the exact line that failed, but they rarely step back and ask, “Where else does this same assumption exist?” So the reported bug gets fixed, but the root cause remains in multiple other places. A few days later, the same issue pops up again in a different file. What’s even more dangerous is when your test setup isn’t actually validating what you think it is. We recently discovered our Jest configuration had been wrong for a long time, so tests were passing while an entire category of issues wasn’t being caught at all. The code looked green. The architecture wasn’t. Another problem - the model is “lazy.” It’s that it optimizes for making tests pass as quickly as possible , and mocking everything is the shortest path. submitted by /u/Fun_Equal_960
Originally posted by u/Fun_Equal_960 on r/ClaudeCode