Struct SplitMix64 

pub struct SplitMix64(/* private fields */);

SplitMix64. Fixed algorithm: the sequence for a given seed is part of magi’s on-disk contract, because a resumed run must recompute the same labels.

Implementations

impl SplitMix64

pub fn new(seed: u64) -> Self

Seed the generator.

pub fn from_key(s: &str) -> Self

Seed from an arbitrary string (FNV-1a), for per-seat derivation.

pub fn next_u64(&mut self) -> u64

Next 64 bits.

pub fn below(&mut self, n: usize) -> usize

Uniform-enough value in 0..n. n must be non-zero.

pub fn shuffle<T>(&mut self, items: &mut [T])

Fisher-Yates, in place.

pub fn uuid_v4(&mut self) -> String

A syntactically valid RFC 4122 version 4 UUID.

claude --session-id rejects anything else, and minting the id ourselves means the first turn and every resume agree on it without having to parse it back out of the CLI’s output.

Trait Implementations

impl Clone for SplitMix64

fn clone(&self) -> SplitMix64

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SplitMix64

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

Formats the value using the given formatter.