Struct ChangeSpineEnvelope 

pub struct ChangeSpineEnvelope {
    pub actor_type: Option<String>,
    pub acting_for: Option<String>,
    pub schema_version: Option<String>,
    pub tenant_id: Option<String>,
    pub duration_ms: Option<i32>,
    pub seq: Option<i64>,
}

Change-Spine envelope metadata delivered to subscription clients alongside the resolved entity data (#425).

Carries the audit / provenance context the Change-Spine records for every change — who made it (actor_type), who a delegated agent acted for (acting_for), the producer schema_version, the tenant_id, the mutation duration_ms, and the durable seq. Serialized camelCase into the subscription next payload’s extensions.changeSpine slot; None fields are omitted, so a producer that stamped nothing yields an empty object (see Self::is_empty, which callers use to skip emitting it entirely).

Fields

actor_type: Option<String>

Actor classification of the request that produced the change: "human_user", "service_account", "ai_agent", or "system_job" (#390).

acting_for: Option<String>

For a delegated-agent request (RFC 8693 act claim), the public-facing UUID of the underlying human the agent acts for (#390).

schema_version: Option<String>

Schema version of the producer that wrote the change (#377).

tenant_id: Option<String>

Public-facing tenant UUID stamp (a display copy of the event’s tenant_id; server-side tenant filtering uses the event’s own field, not this).

duration_ms: Option<i32>

Wall-clock duration of the originating mutation, in milliseconds.

seq: Option<i64>

Monotonic Change-Spine sequence for durable ordering / dedup.

Implementations

impl ChangeSpineEnvelope

pub const fn is_empty(&self) -> bool

True when no envelope field is set — callers skip emitting an empty object.

Trait Implementations

impl Clone for ChangeSpineEnvelope

fn clone(&self) -> ChangeSpineEnvelope

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ChangeSpineEnvelope

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

Formats the value using the given formatter.

impl Default for ChangeSpineEnvelope

fn default() -> ChangeSpineEnvelope

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for ChangeSpineEnvelope

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for ChangeSpineEnvelope

impl PartialEq for ChangeSpineEnvelope

fn eq(&self, other: &ChangeSpineEnvelope) -> 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 ChangeSpineEnvelope

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 ChangeSpineEnvelope