ActivityEntry

One line of a subject's activity - a projection of an envelope, not the envelope.

A pane asking "what happened to this task" wants what happened, when, who did it and which lines belong to one gesture. It does not want the device id, the profile id, the emitting session, the payload version or the journal's own append clock, all of which a [StoredEvent] carries. Sending the whole envelope would mean handing a rendering surface a device identity it has no use for, and every later field added to the envelope with it - so the row is enumerated here and the envelope stays the journal's shape.

No content, structurally. The only free-form thing an envelope holds is its attributes, and [AttrValue] has no free-string variant: a value is a reference, a time, a count, a flag, or a token from the vocabulary the registry declared for that key. So passing the map through whole cannot leak a title, a due date, a tag name or a line of text, and the pane gets the tokens it actually needs - reason on a lifecycle event, change and temporal_kind on a Due change, child on a structural one - without this type learning a field per event.

Type object

Shape

Field	Type	Description
seqrequired	integer (uint64, >= 0)	The journal position. The page cursor, and the only ordering: two entries are compared by this and never by `occurred_at_ms`.
namerequired	EventName	A registry-validated dotted event name, e.g. `document.created`. Construct literals through [`crate::event_name!`], which fails the build on a name missing from the registry; a runtime-built name is refused by [`crate::validate`] at the boundary instead.
occurred_at_msrequired	integer (int64)	Wall clock, epoch ms UTC. Display only - clocks skew and devices sleep, so a surface prints this and orders by `seq`.
actorrequired	ActorKind	Who acted, as a kind: a person, an agent, or a part of the system.
actor_token	string or null	The actor's registered name token when it has one - an agent's name, a system component (`store`, `importer`). Lowercase and from a closed vocabulary, never prose, and absent for a person at this profile.
correlation_idrequired	EventId	The causal group. A cascade - completing a parent completes every task under it - is a set of events sharing one of these, not one event with a count, so a pane folds a group into one line by this key. It is [`Envelope::chain_root`] already resolved: an event that started its own chain reports its own id, so this is never absent and a reader never has to know the `None`-means-self rule.
attrs	map of string to AttrValue	The event's declared attributes, whole - see the type doc for why that cannot be content.

Example

{
  "seq": 0,
  "name": "string",
  "occurred_at_ms": 0,
  "actor": {},
  "actor_token": "string",
  "correlation_id": {},
  "attrs": {
    "key": {
      "t": "id",
      "v": "00000000-0000-4000-8000-000000000000"
    }
  }
}

The contract has no example values, so example bodies are generated from each schema: every field is shown with a placeholder of its type.

Generated from contract version 1. Last updated November 12, 2026.