I built 14,000 lines of code before talking to a single user. Here's what I learned.

10 weeks ago I was convinced I was building something nobody else had. The idea: a GitHub App that reads every changed Python function in a PR, infers what it should always do — "the total should never be negative", "the result should never be None" — then attacks it with adversarial inputs in a hardened Docker sandbox. Only posts a comment when it has concrete proof something broke. No guessing. No noise. Just: LogoMesh found 1 issue Negative quantity bypasses checkout validation Property: Orde