{
  "version": "0.17.3",
  "date": "2026-10-31",
  "scope": "Descriptor ownership under close and fsync failures; no public API or disk format change",
  "baseline_reproduction": {
    "version": "0.17.2",
    "method": "Close owned descriptor, immediately open an unrelated file on the same number, then throw EIO",
    "atomic_and_stream_both_reproduced": true,
    "unrelated_descriptor_intact_before_fix": false
  },
  "fixed_paths": [
    "atomic file publication",
    "stream file publication",
    "recording segment close/unlock",
    "artifact batch close/unlock"
  ],
  "regression": {
    "result": "passed",
    "cases": [
      {
        "kind": "atomic",
        "fault": "space",
        "result": "passed",
        "publication": "no target",
        "injections": 1
      },
      {
        "kind": "atomic",
        "fault": "sync",
        "result": "passed",
        "publication": "no target",
        "injections": 1
      },
      {
        "kind": "atomic",
        "fault": "link",
        "result": "passed",
        "publication": "no target",
        "injections": 1
      },
      {
        "kind": "atomic",
        "fault": "close",
        "result": "passed",
        "publication": "no target",
        "injections": 1
      },
      {
        "kind": "atomic",
        "fault": "reuse",
        "result": "passed",
        "publication": "no target",
        "injections": 1
      },
      {
        "kind": "atomic",
        "fault": "cleanup",
        "result": "passed",
        "publication": "complete target retained",
        "injections": 1
      },
      {
        "kind": "stream",
        "fault": "space",
        "result": "passed",
        "publication": "no target",
        "injections": 2
      },
      {
        "kind": "stream",
        "fault": "zero",
        "result": "passed",
        "publication": "no target",
        "injections": 1
      },
      {
        "kind": "stream",
        "fault": "short",
        "result": "passed",
        "publication": "complete target",
        "injections": 285641
      },
      {
        "kind": "stream",
        "fault": "sync",
        "result": "passed",
        "publication": "no target",
        "injections": 1
      },
      {
        "kind": "stream",
        "fault": "link",
        "result": "passed",
        "publication": "no target",
        "injections": 1
      },
      {
        "kind": "stream",
        "fault": "close",
        "result": "passed",
        "publication": "no target",
        "injections": 1
      },
      {
        "kind": "stream",
        "fault": "reuse",
        "result": "passed",
        "publication": "no target",
        "injections": 1
      },
      {
        "kind": "stream",
        "fault": "create-close",
        "result": "passed",
        "publication": "no target",
        "injections": 1
      },
      {
        "kind": "stream",
        "fault": "cleanup",
        "result": "passed",
        "publication": "complete target retained",
        "injections": 1
      },
      {
        "kind": "recording",
        "fault": "sync",
        "result": "passed",
        "injections": 1,
        "publication": "no committed segment or artifact",
        "owned_handles_closed": true
      },
      {
        "kind": "recording",
        "fault": "reuse",
        "result": "passed",
        "injections": 1,
        "publication": "no committed segment or artifact",
        "owned_handles_closed": true
      },
      {
        "kind": "batch",
        "fault": "sync",
        "result": "passed",
        "injections": 1,
        "publication": "no committed segment or artifact",
        "owned_handles_closed": true
      },
      {
        "kind": "batch",
        "fault": "reuse",
        "result": "passed",
        "injections": 1,
        "publication": "no committed segment or artifact",
        "owned_handles_closed": true
      }
    ],
    "power_loss_tested": false,
    "source_unchanged": true,
    "notes": "Injected syscall failures exercise real staging writes. Post-link cleanup failure explicitly reports a complete published target; never retry blindly."
  },
  "regression_script": "tools/fs_fault_workflows.py",
  "runtime": "Windows, Node 24.15.0, moonc 0.10.17+d971670cd",
  "limits": [
    "Injected close errors first release the descriptor; no assumption that every possible kernel close failure has identical behavior.",
    "No power-loss safety claim.",
    "CI executes the same regression on Linux/Windows Node minimum 22.3.0 and maintained 22."
  ]
}