{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "title": "Cortex Artifact Bus Entry",
  "type": "object",
  "required": ["artifact_id", "seq", "task_id", "agent_id", "produced_at", "kind", "payload"],
  "properties": {
    "artifact_id": { "type": "string", "minLength": 1 },
    "seq": { "type": "integer", "minimum": 1 },
    "task_id": { "type": "string", "minLength": 1 },
    "mission_id": { "type": ["string", "null"] },
    "agent_id": { "type": "string", "minLength": 1 },
    "produced_at": { "type": "string", "format": "date-time" },
    "kind": {
      "type": "string",
      "enum": ["plan", "execution", "review", "handoff", "validation", "state", "note", "knowledge-graph"]
    },
    "summary": { "type": "string" },
    "refs": {
      "type": "array",
      "items": { "type": "string" }
    },
    "payload": { "type": "object" }
  },
  "additionalProperties": false
}