{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "title": "Cortex Agent Inbox Index",
  "type": "object",
  "required": ["messages"],
  "properties": {
    "messages": {
      "type": "array",
      "items": {
        "type": "object",
        "required": ["message_id", "path", "type", "status", "updated_at"],
        "properties": {
          "message_id": { "type": "string", "pattern": "^IM-[A-Za-z0-9][A-Za-z0-9._-]*$" },
          "path": { "type": "string", "pattern": "^\\.agent/inbox/IM-[^/]+\\.json$" },
          "type": { "type": "string", "enum": ["information", "request", "handoff", "decision_request", "alert"] },
          "status": { "type": "string", "enum": ["unread", "read", "acknowledged", "archived"] },
          "subject": { "type": "string" },
          "updated_at": { "type": "string", "format": "date-time" }
        },
        "additionalProperties": false
      }
    }
  },
  "additionalProperties": false
}