pin the quantisation stack that matches this NF4 checkpoint

pin the quantisation stack that matches this NF4 checkpoint

deps: add torchvision/num2words - the Mistral VLM text encoder needs the Pixtral processor

deps: use released diffusers - the NF4 checkpoint predates the loader refactor on main

FLUX.2 dev 4-bit studio: self-contained pipeline with multi-reference editing

initial commit