I think he likely means "code that is hand-reviewed" and not directly controlled by the agent. He's probably meaning to differentiate it against the in-process agent writing the code. It doesn't matter too much if that fixed code was written by an LLM under guidance and review of the SWE, outside the agent.

Maybe not hand-written, but definitely static, and at least human-reviewed/tested to only allow sending to previously-validated email addresses.