Struct HcWeights 

pub struct HcWeights {
    pub attn: HcSiteWeights,
    pub ffn: HcSiteWeights,
    pub head: Option<HcHeadWeights>,
    pub hc_mult: usize,
    pub sinkhorn_iters: usize,
    pub hc_eps: f32,
    pub is_first_model_layer: bool,
    pub is_last_model_layer: bool,
}

Fields

attn: HcSiteWeights

ffn: HcSiteWeights

head: Option<HcHeadWeights>

2026-09-25: Model-level head weights, used only by the last model layer’s hc_head call.

hc_mult: usize

sinkhorn_iters: usize

hc_eps: f32

is_first_model_layer: bool

2026-09-25: Whether this is model layer 0, the layer that seeds the highway with hc_expand.

Carried here because attn_layer_idx counts attention layers only; on a model that interleaves GDN and attention layers the two indices differ.

is_last_model_layer: bool

2026-09-25: Whether this is the last model layer, the one that collapses the highway with hc_head. Carried here for the same reason. On qwen4_exp that collapse is also the final norm: the checkpoint has no model.norm, and the loader installs a placeholder.