{
  "id": "system-file-basic",
  "ruleId": "system/file",
  "input": {
    "toolName": "exec",
    "argv": ["file", "output.mp4"],
    "command": "file output.mp4",
    "combinedText": "output.mp4: ISO Media, MP4 Base Media v1 [ISO 14496-12:2003]\n",
    "exitCode": 0
  },
  "expect": {
    "matchedReducer": "system/file",
    "family": "file-inspection",
    "contains": ["output.mp4: ISO Media, MP4 Base Media v1"]
  }
}