I discovered a large security concern that has existed for a decade, since the code was originally written. I was working on an unrelated task when my AI agent discovered an oversight because the agent happen to examine that file.

Everything was sound and every test passed for years along with every security scan because intent was not validated.

I would expect an unending source of exploits in the future until AI rewrites everything.

AI writing the code doesn't make it safer. It is prone to making all the same mistakes humans do.

AI reviewing the code does help, though.