true ⇒ no error-severity findings across the whole map (the gate).
context-budget findings (model-fit / over-budget / overloaded / empty-layer / passthrough / flattenable) — the right-sizing check.
for every over-target agent: what to move to cold-tail or extract into a sub-agent (split DOWN).
for every thin/redundant layer: what to collapse up (the dual — merge UP).
entry-point agents — not referenced as a sub-agent by any other agent.