{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "$id": "https://cortex-agent/schemas/event-bus/subagent_cancelled.json",
  "title": "subagent_cancelled payload",
  "type": "object",
  "required": ["reason"],
  "additionalProperties": true,
  "properties": {
    "reason":       { "type": "string" },
    "cancelled_by": { "enum": ["user", "parent", "system"] }
  }
}