Jian

FUM - Fix Your Mesh is a lightweight Blender addon for mesh validation and export preflight. It detects non-manifold edges, flipped normals, N-gons, duplicate and isolated vertices, then reports results as PASS, WARNING or FAIL.

Pipeline Inspector is a Blender add-on that checks assets for common handoff problems before export or delivery. It reports a READY or NOT READY status covering textures, materials, scale, UVs, and normals.