Struct UcmEvent 

pub struct UcmEvent {
    pub event_id: Uuid,
    pub timestamp: DateTime<Utc>,
    pub causation_id: Option<Uuid>,
    pub schema_version: u32,
    pub payload: EventPayload,
}

A mutation event in the context graph’s append-only log.

Every field change, relationship addition, or confidence update is captured as a typed event with full provenance.

Fields

event_id: Uuid

Unique event identifier (UUID v7 for time-ordering)

timestamp: DateTime<Utc>

When this event occurred

causation_id: Option<Uuid>

Which event caused this one (for causation chains)

schema_version: u32

Schema version for upcasting support

payload: EventPayload

The actual mutation

Implementations

impl UcmEvent

pub fn new(payload: EventPayload) -> Self

Create a new event with auto-generated UUID v7 and current timestamp.

pub fn caused_by(payload: EventPayload, parent: Uuid) -> Self

Create a new event with a causation chain link.

Trait Implementations

impl Clone for UcmEvent

fn clone(&self) -> UcmEvent

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for UcmEvent

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for UcmEvent

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for UcmEvent

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

where __S: Serializer,

Serialize this value into the given Serde serializer.