Enum ChangeEnvelope 

pub enum ChangeEnvelope {
    Added {
        id: EntityId,
        title: Option<String>,
        entity_type: Option<String>,
    },
    Updated {
        id: EntityId,
        title: Option<String>,
        entity_type: Option<String>,
    },
    Removed {
        id: EntityId,
        title: Option<String>,
        entity_type: Option<String>,
    },
    Renamed {
        from_id: EntityId,
        to_id: EntityId,
        title: Option<String>,
        entity_type: Option<String>,
    },
}

Single delta entry between two snapshots. Renamed collapses what would otherwise appear as a Removed + Added pair so agents see one semantic event per filesystem rename.

title and entity_type are best-effort enrichment from the engine’s in-memory store: present when the backend’s diff resolves to an entity the engine still knows about, None otherwise. Removed envelopes always leave both None (the entity is gone by definition); other variants populate when the lookup succeeds.

Variants

Added

Fields

id: EntityId

title: Option<String>

entity_type: Option<String>

Updated

Fields

id: EntityId

title: Option<String>

entity_type: Option<String>

Removed

Fields

id: EntityId

title: Option<String>

entity_type: Option<String>

Renamed

Fields

from_id: EntityId

to_id: EntityId

title: Option<String>

entity_type: Option<String>

Implementations

impl ChangeEnvelope

pub fn primary_id(&self) -> &str

The id this change sorts and renders under — to_id for a rename (the surviving entity), the entity id otherwise.

pub fn action(&self) -> &'static str

The wire action verb — the same token the serde tag emits and memstead_changes_since reports: added | updated | removed | renamed.

pub fn entity_type(&self) -> Option<&str>

Best-effort entity type carried on the envelope (None on Removed, or when the store lookup missed).

Trait Implementations

impl Clone for ChangeEnvelope

fn clone(&self) -> ChangeEnvelope

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ChangeEnvelope

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

Formats the value using the given formatter.

impl Eq for ChangeEnvelope

impl PartialEq for ChangeEnvelope

fn eq(&self, other: &ChangeEnvelope) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl Serialize for ChangeEnvelope

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for ChangeEnvelope