Struct ExpertRecordHeader 

pub struct ExpertRecordHeader {
    pub layer: u32,
    pub expert: u32,
    pub inter: u32,
    pub hidden: u32,
    pub group_size: u32,
    pub scale2: [f32; 3],
    pub input_scale: [Option<f32>; 3],
}

2026-09-25: The fixed, versioned header at the front of every expert record. It carries what the dims do not give, each projection’s weight_scale_2 and input_scale, plus layer, expert and shape so a mismatched file can be recognised.

Fields

layer: u32

expert: u32

inter: u32

hidden: u32

group_size: u32

scale2: [f32; 3]

2026-09-25: weight_scale_2 of gate, up, down.

input_scale: [Option<f32>; 3]

2026-09-25: input_scale of gate, up, down; None when the projection has none. Presence is a bit in the header’s input_scale_flags word, so PartialEq needs no NaN sentinel.

Implementations

impl ExpertRecordHeader

pub const MAGIC: u32 = 0x5850_5254

pub const VERSION: u32 = 1

pub const BYTES: u64 = 256

2026-09-25: Reserved header size; the fields use the first 56 bytes, so the header can grow without moving the sub-buffers.

pub fn to_bytes(&self) -> [u8; 256]

2026-09-25: Serialize into the fixed 256-byte header block, little-endian: u32 magic, u32 version, u32 layer, u32 expert, u32 inter, u32 hidden, u32 group_size, u32 input_scale_flags, f32 scale2[3], f32 input_scale[3] (0.0 where absent), zero pad to 256. input_scale_flags bit i set => projection i has an activation scale.

pub fn from_bytes(buf: &[u8]) -> Option<Self>

2026-09-25: Parse a header block. None when it is shorter than BYTES or the magic or version differs.

Trait Implementations

impl Clone for ExpertRecordHeader

fn clone(&self) -> ExpertRecordHeader

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ExpertRecordHeader

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

Formats the value using the given formatter.

impl PartialEq for ExpertRecordHeader

fn eq(&self, other: &ExpertRecordHeader) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for ExpertRecordHeader

impl StructuralPartialEq for ExpertRecordHeader