Universal Model Loader 1.3.1

Fix MOSS routing from existing universal nodes: early actionable rejection before core weight loading, and right-click Add MOSS-Image loader (typed). Copies filenames verbatim into a typed sibling without changing existing links or substituting VAE/model files.

The reported raw/pruned INT8 checkpoint remains unsupported; use independently exported MOSS components with moss-image-t8 official encode/sample/decode nodes. No fictional moss CLIP enum.

Verified: 16 Python tests, 7 frontend tests, real installed core contracts (37 config classes), real Base/SFT component integrity validation and INT8 rejection, Registry validation. Descriptor loading only; no inference claim. Restart ComfyUI and refresh browser after updating.