The signals that human debugging is now cheaper
Repeated prompts change several files without proving the cause, old bugs return, preview and production disagree, or each fix creates another failure. At that point, another broad generation pass can cost more time than reproducing one exact user path and tracing it across the layers that own it.
What the developer does differently
The work begins with evidence: a repeatable action, expected result, actual result, first failing response, relevant log, and known project state. The repair targets the responsible boundary, preserves unrelated working behavior, and adds enough regression protection to keep the same failure from returning silently.
You do not need a clean codebase first
Untidy generated code is not automatically a rebuild. A focused failure can often be repaired in place. If duplication or unclear ownership prevents a safe change, the estimate can isolate a cleanup or subsystem replacement without turning the entire project into a new build.
Choose done-for-you or work together live
Hand over the project after a scope is accepted, or keep control in a screen-sharing session while the failure is traced and repaired with you. Both use the same transparent rate and direct access to the person doing the technical work.