pub fn config_declared_variant(config: &ModelConfig) -> Option<Nvfp4Variant>Expand description
Step (1) of detect_nvfp4_variant: the variant the CONFIG declares,
asked WITHOUT a WeightStore.
Factored out (#915, 2026-09-11) so a caller that has only config.json —
the pre-load residency prediction in
weight_loader::predicted_residency, which runs before the store
exists — asks exactly the question the loader will later answer instead
of keeping a second copy of this precedence. None means “the config
does not say”; it is NEVER a guess, and the sniffing half of
detect_nvfp4_variant is what resolves it once the store is loaded.