Your LLM Is Wrong. Your Codebase Is Why.

It happened on a Tuesday. I asked my AI coding assistant to explain a function I'd written three months earlier. It described a function that doesn't exist. Not a total hallucination. The function did exist. Just not by that name, not with those parameters, not doing what the model confidently told me it was doing. The model had assembled a plausible story from vague signals and filled the gaps with fiction. My first instinct was to blame the model. My second instinct, the one that actually helped, was to look at the code itself. The model wasn't broken. My codebase was.