Compare Stages

Produce a structured diff between two USD stages — typically the original asset and the optimized output. Reports what changed at multiple levels: file size, prim/mesh/vertex/material counts, and (optionally) validator findings.

What this skill covers

• Usage — arguments and modes.
• Step 1 — collect metrics from both stages.
• Step 2 — present the comparison table.
• Step 3 — (optional) diff validator summaries.
• Step 4 — (optional) prim-level diff.