Fable Broke My App and Couldn't Fix It

Why watch

Theo debugging a performance issue where T3 stack code was consuming 50% of GPU process on an idle page. Despite Fable (AI code analysis) and GPT-5.6 attempting to diagnose the issue, both tools incorrectly blamed the wrong code, forcing manual investigation and fix. Relevant for developers using the T3 stack or dealing with AI-assisted debugging limitations.