message.heard

A turn working in a room heard a message said there, as it worked.

Direction: Harness → Chips
Sent by: a harness
Requires a run: yes
Schema: message.heard.json

Fields

Every event also carries the envelope.

Field	Required	Type	Description
v	yes	1	Protocol major version.
type	yes	"message.heard"
id	yes	string	The event’s own id. Stable across a retry of the same event.
ts	yes	string	When it happened, by Chips’ clock. Stamped on the way in; a value the sender writes is replaced.
workspace_id	yes	string	A workspace identifier: ws_ followed by a ULID.
space_id	no	string	The space, when the event belongs to one.
run_id	no	string	The run, when the event belongs to one.
seq	no	number	Assigned by the server on append, monotonic per workspace. Absent on the way in.
idempotency_key	no	string	Required on every client-originated write. Sending the same key twice is a no-op.
actor	yes	object	The participant an event is attributed to.
actor.kind	yes	"person" | "harness" | "agent" | "system"	Whether a person, a harness, one of a harness’s agents or Chips itself acted.
actor.id	yes	string	The participant id, or system for Chips.
actor.harness_id	no	string	For an agent: the harness it speaks through, whose budget and runs are the agent’s (ADR 0087). Filled in by Chips.
message_id	yes	string	The message, as message.overheard or message.new named it.

Example

{
  "v": 1,
  "type": "message.heard",
  "id": "evt_01K4ZQPX0000000000000000H7",
  "ts": "2026-10-03T19:31:00.000Z",
  "workspace_id": "ws_01K4ZQPX000000000000000001",
  "space_id": "spc_01K4ZQPX000000000000000002",
  "actor": {
    "kind": "agent",
    "id": "agt_01K4ZQPX0000000000000000A1"
  },
  "run_id": "run_01K4ZQPX000000000000000005",
  "message_id": "msg_01K4ZQPX0000000000000000M9"
}