{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://agentroom.dev/schemas/arp/event-envelope.v1.json",
  "title": "Agent Room Event Envelope",
  "type": "object",
  "additionalProperties": false,
  "required": ["id", "project_id", "type", "subject_type", "subject_id", "actor_id", "occurred_at", "schema_version", "payload"],
  "properties": {
    "id": {"type": "string", "minLength": 1},
    "cursor": {"type": "integer", "minimum": 0},
    "project_id": {"type": "string", "minLength": 1},
    "type": {"type": "string", "minLength": 1},
    "subject_type": {"type": "string", "enum": ["agent", "run", "session", "task", "attention", "evidence", "artifact", "approval", "intervention", "chat_message", "budget", "claim", "audit", "organization", "human", "project", "host", "agent_instance", "task_transition", "situation", "policy", "deployment"]},
    "subject_id": {"type": "string", "minLength": 1},
    "actor_id": {"type": "string", "minLength": 1},
    "command_id": {"type": "string"},
    "correlation_id": {"type": "string"},
    "causation_id": {"type": "string"},
    "source_system": {"type": "string"},
    "source_event_id": {"type": "string"},
    "source_sequence": {"type": "integer", "minimum": 0},
    "occurred_at": {"type": "string", "format": "date-time"},
    "schema_version": {"const": 1},
    "payload": {}
  }
}