ProSST structure tokenizer (rem2 / VenusREM2)

Structure-token assets used by rem2 when you run --model prosst or --model venusrem2.

On first use, rem2 downloads only the files it needs into ~/.cache/rem2/weights/prosst/static/:

File	Used by
static/AE.pt	All ProSST vocab sizes
static/{K}.joblib	--model prosst-{K} and VenusREM2 members. K ∈ {20, 64, 128, 512, 1024, 2048, 4096}

VenusREM2's official ensemble uses K ∈ {20, 128, 512, 1024, 2048, 4096} (not 64).

These files are the local structure tokenizer (AE.pt + k-means vocab). They are not the ProSST language-model weights.