Struct DflashConfig 

pub struct DflashConfig {

    pub hidden_size: usize,
    pub num_hidden_layers: usize,
    pub intermediate_size: usize,
    pub num_attention_heads: usize,
    pub num_key_value_heads: usize,
    pub head_dim: usize,
    pub vocab_size: usize,
    pub draft_vocab_size: Option<usize>,
    pub tie_word_embeddings: bool,
    pub block_size: usize,
    pub dflash_config: Option<DflashSubConfig>,
    pub rope_theta: f32,
    pub rope_scaling: Option<DflashRopeScaling>,
    pub markov_rank: usize,
    pub markov_head_type: Option<String>,
    pub enable_confidence_head: bool,
    pub confidence_head_with_markov: bool,
}

2026-09-25: The fields of a drafter’s config.json that the engine reads, under their config.json names. Unknown keys are ignored.

Fields

hidden_size: usize

num_hidden_layers: usize

intermediate_size: usize

num_attention_heads: usize

num_key_value_heads: usize

head_dim: usize

vocab_size: usize

draft_vocab_size: Option<usize>

tie_word_embeddings: bool

block_size: usize

2026-09-25: Top-level block size γ; 16 when absent. Read it through DflashConfig::effective_block_size.

dflash_config: Option<DflashSubConfig>

rope_theta: f32

2026-09-25: Drafter RoPE θ; 10,000,000 when absent.

rope_scaling: Option<DflashRopeScaling>

2026-09-25: The rope_scaling block, also read under the key rope_parameters. None means plain RoPE. With rope_type == "yarn" the head builds a YaRN inv_freq table; any other block falls back to plain RoPE with a warning.

markov_rank: usize

2026-09-25: DSpark Markov head rank, a top-level key; 0 when absent, which loads no Markov head.

markov_head_type: Option<String>

2026-09-25: DSpark Markov head type. When the Markov head loads, any value other than "vanilla" fails the load.

enable_confidence_head: bool

2026-09-25: Load the DSpark confidence head (confidence_head.proj.*) when the checkpoint has it; false when absent.

confidence_head_with_markov: bool

2026-09-25: When true the confidence head reads the hidden state and then the Markov embedding (hidden_size + markov_rank inputs); when false, the hidden state only. True when absent.

Implementations

impl DflashConfig

pub fn effective_block_size(&self) -> usize

2026-09-25: Resolved block size γ: dflash_config.block_size when set, else the top-level field. The sub-config comes first because serde fills the top-level default of 16 for a checkpoint that never states it.

Trait Implementations

impl Clone for DflashConfig

fn clone(&self) -> DflashConfig

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for DflashConfig

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for DflashConfig

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.