Subdivision and Retopology Budget Agent

Retopology passes often go over the triangle budget or lose the details that make an asset read well. This agent takes the high-poly mesh and builds a low-poly pass to the target triangle count. It bakes normal and ambient occlusion maps from the high-poly source, then compares silhouette and baked detail against the original. If silhouette error or bake artifacts exceed limits, it adjusts edge flow, spends more triangles where the silhouette needs them and moves bake cages, then bakes again. It also checks the final triangle count against the budget after every change. When both checks pass, or after six rounds, it stops and reports what it could not fix. The artist approves the final low-poly before it enters the asset library. Edge case: a thin blade that bakes with ghosting is split into separate cage parts.