Constant FORMAT_FLAG_TERNARY 

pub const FORMAT_FLAG_TERNARY: u16 = _; // 4u16

format_flags bit: tensors were ternary-quantized (BitNet 1.58b) during transcode — each blob is [scale: f32][packed trits] (ggml_type = ternary::GGML_TYPE_TERNARY_158); decode via ternary::dequantize_blob.