Function gguf_name 

pub fn gguf_name(
    var: &str,
    attention_layers: &BTreeSet<usize>,
) -> Option<String>

The checkpoint tensor a LOGOS weight variable comes from, by the extractor’s naming convention (examples/extract_qwen38.rs): Wq3 → blk.3.attn_q.weight on an attention layer, Wq0 → blk.0.attn_qkv.weight on a Gated DeltaNet layer. None for a name the convention does not cover.