I spent two and a half weeks building an agent that reads a project's code review history and remembers what it decided. 86,321 comments from pandas, distilled into 298 conventions, served out of CockroachDB behind a Lambda.

Every serious bug I hit had the same shape. Nothing raised. Tests passed. The demo worked. And somewhere in the middle, a component was doing absolutely nothing.

Here are five, with the code.

1. bool("false") is True

The whole point of the system is that it refuses when it does not know. The answering prompt returns JSON with an answered field.