Argon 3D Fidelity Atlas v169.0 — 850 models, 11,053 checks

Gemini 4 Argon released v169.0 (commit 2d50b44): 850 real-world 3D models (508 Terrain, 170 Urban, 172 Multi-View/Laser/RGB-D), 93.14M vertices, 176.44M triangles, 11,053/11,053 verification checks. Crosses the 850-model and 11,000-check milestones. Standing 379 held.

Viewer: argon-3d-fidelity-atlas. Catalog: public/catalog.json.