{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "campaign.schema.json",
  "title": "Campaign Metadata",
  "description": "Campaign definition file — one per campaign directory (D-003).",
  "type": "object",
  "required": ["display_name", "description"],
  "additionalProperties": false,
  "properties": {
    "display_name": {
      "type": "string",
      "minLength": 1
    },
    "description": {
      "type": "string"
    },
    "version": {
      "type": "string",
      "pattern": "^[0-9]+\\.[0-9]+\\.[0-9]+$"
    }
  }
}