Struct HistoryRecord 

pub struct HistoryRecord {

    pub id: String,
    pub seq: u64,
    pub parent: Option<String>,
    pub snapshot: String,
    pub op_kind: Option<String>,
    pub label: Option<String>,
    pub affected: Vec<String>,
    pub timestamp_ms: Option<u128>,
    pub author: Option<String>,
    pub action_id: Option<String>,
    pub action_version: Option<String>,
    pub preview_hash: Option<String>,
    pub replay_eligible: bool,
}

A single entry in the history manifest.

The snapshot field is the substance: the content-addressed object hash of the full document state at this point in history. All other fields are optional display metadata and are never required to reconstruct state.

Fields

id: String

Stable record id (unique within a manifest).

seq: u64

Monotonic sequence number within this manifest (0-based).

parent: Option<String>

Parent record id in the history DAG (None for the first record).

snapshot: String

THE SUBSTANCE: object hash of the full snapshot for this record.

op_kind: Option<String>

Optional label for the kind of operation that produced this state.

label: Option<String>

Optional human-facing label / version name.

affected: Vec<String>

Optional list of affected node ids (display only).

timestamp_ms: Option<u128>

Optional unix-ms timestamp.

author: Option<String>

Optional author/participant id.

action_id: Option<String>

Id of the agent action that produced this record (agent checkpoints only).

action_version: Option<String>

Version pin for action_id (e.g. an action revision string).

preview_hash: Option<String>

Content hash linking this record to a rendered preview artifact.

replay_eligible: bool

Whether this record can be deterministically re-run. Defaults to false.

Implementations

impl HistoryRecord

pub fn new( id: impl Into<String>, seq: u64, parent: Option<String>, snapshot: impl Into<String>, ) -> Self

Construct a lean record: the required core (id, seq, parent, snapshot) with all optional metadata empty. Set the optional fields afterward.

Trait Implementations

impl Clone for HistoryRecord

fn clone(&self) -> HistoryRecord

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for HistoryRecord

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for HistoryRecord

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for HistoryRecord

fn eq(&self, other: &HistoryRecord) -> 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 Serialize for HistoryRecord

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for HistoryRecord