Struct StrataArena 

pub struct StrataArena { /* private fields */ }

Arena for storing historical engrams

Uses a flat buffer with per-lineage ring buffer semantics. Each lineage has a fixed-size window of history.

Implementations

impl StrataArena

pub fn with_capacity(max_lineages: usize, depth: usize) -> Self

Create a new strata arena

Arguments

• max_lineages - Maximum number of lineages
• depth - History depth per lineage

pub fn depth(&self) -> usize

Get the history depth

pub fn record( &mut self, lineage: LineageId, current_head: u32, engram: Engram, ) -> u32

Record a new engram for a lineage

Returns the global index of the new engram, and updates the head_index that should be stored in the Lineage.

pub fn get(&self, index: u32) -> Option<&Engram>

Get an engram by global index

pub fn history(&self, head_index: u32) -> impl Iterator<Item = &Engram>

Iterate through a lineage’s history (newest to oldest)

pub fn as_slice(&self) -> &[Engram]

Get raw data for persistence