Struct V8Meta 

pub struct V8Meta {
    pub labels: Vec<u32>,
    pub wal_truncated: bool,
    pub edge_props: EdgeProps,
    pub rule_defs: Vec<Vec<u8>>,
    pub provenance: BTreeMap<String, BTreeSet<(u32, u32, u32)>>,
    pub rule_tripped: BTreeMap<String, bool>,
    pub rule_fires: BTreeMap<String, u64>,
    pub view_defs: Vec<Vec<u8>>,
    pub hnsw: BTreeMap<String, (Vec<u8>, Vec<u8>)>,
    pub ivf_bytes: Vec<u8>,
    pub last_change: HashMap<u32, u64>,
}

Metadata serialized as bincode into section 4.

T5 lean layout: only labels and wal_truncated live here. All large fields (edge_props, provenance, hnsw, rule_defs, rule_tripped, rule_fires, view_defs) have dedicated rkyv sections (5–9) and are encoded directly from the corresponding fields in encode_v8. ivf_state is in section 10. The edge_props, hnsw, rule_defs, rule_tripped, rule_fires, view_defs, and provenance fields below are kept in V8Meta solely as a convenient carrier passed to encode_v8 so callers don’t need to pass a dozen separate arguments; they are NOT written to the bincode META section (marked #[serde(skip)]).

Fields

labels: Vec<u32>

Node-id → label-symbol mapping.

wal_truncated: bool

Snapshot-truncated-WAL flag.

edge_props: EdgeProps

rule_defs: Vec<Vec<u8>>

provenance: BTreeMap<String, BTreeSet<(u32, u32, u32)>>

rule_tripped: BTreeMap<String, bool>

rule_fires: BTreeMap<String, u64>

view_defs: Vec<Vec<u8>>

hnsw: BTreeMap<String, (Vec<u8>, Vec<u8>)>

ivf_bytes: Vec<u8>

Raw bincode bytes of BTreeMap<String, PerRuleIvfState>. Written as section 10. Retained undecoded at open for lazy init. An empty Vec means no approximate rules exist.

last_change: HashMap<u32, u64>

Per-node last-change commit sequence map: node_id → commit_seq. Written as section 11 (bincode HashMap<u32, u64>). Empty for legacy or freshly-opened stores with no mutations.

Trait Implementations

impl Default for V8Meta

fn default() -> V8Meta

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for V8Meta

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for V8Meta

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.