Installation custody archived-prefix counterexample: actual result 01

C-083 admitted the exact source-control plan at clean trust-only 609368acd7ae3b126b0ba1a82e69281ef1e8acf4. Production remained unchanged, SHA-256 b100089a531e5cfec9b54a414245ed1e0a4e48c71e765a544a95653eb6adda4d.

Exactly one method ran and failed with ValueError not raised, exit 1, as registered. The real stopped snapshot reader admitted the rebuilt archive/offsets/cursor/frame CRCs and exact-byte ACKs before conserve accepted the missing leading source line. There was no setup, import, CRC or missing-ACK failure. This is the literal S1 conservation defect, not a candidate guest or product runtime failure.

The outer service confirmed stop, reported no swap/OOM and retained its failure evidence. The test itself cleans its tiny temporary fixture directories; the deterministic hand-encoded regression is retained in the trust commit and full registered plan, and removed fixture bytes were not reconstructed. Draft #67 remains held for correction; the historic 44c71b1 greens do not cover that correction. No guest, compile, installation or native acceptance ran.

results/service-opening-candidate/installation-custody-prefix-red-01.json

SHA-256 90b44b6156fcef8936d10d0ed6b7e8aaf12fd967b5a4c7657e444c8a065e75a6, 1712 bytes.

{
  "label": "installation-custody-prefix-red-01",
  "command": [
    "env",
    "PYTHONPATH=tools/qualification/install:tools/qualification:tools",
    "python3",
    "-B",
    "-m",
    "unittest",
    "-v",
    "test_custody_witness.CustodyWitnessControls.test_archived_leading_lost_line_cannot_escape_source_conservation"
  ],
  "delegated": false,
  "frozen": null,
  "scope": "harness controls only; no candidate acceptance evidence",
  "harness_revision": "609368acd7ae3b126b0ba1a82e69281ef1e8acf4",
  "source_status_before": "",
  "storage_root": "/run/media/kmosoti/data/FabricO11y",
  "admission_bytes": 32272573948,
  "admission_observation": {
    "data_bytes": 32272573948,
    "regular_path_bytes": 32272487687,
    "path_count": 380866,
    "uid": 0,
    "gid": 0,
    "attempt": 1
  },
  "reserved_bytes": 1073741824,
  "observations": [],
  "started_utc": "2026-10-13T04:52:15.658146+00:00",
  "state": "completed",
  "log": "/run/media/kmosoti/data/FabricO11y/results/service-opening-candidate/installation-custody-prefix-red-01.log",
  "launcher_exit": 1,
  "exit": 1,
  "source_status_after": "",
  "finished_utc": "2026-10-13T04:52:16.664621+00:00",
  "log_sha256": "f83171fa88782036e7c1c5f69b496bd8afe6aff0f35a7d27d3793af1fbf2fd1c",
  "resource_receipts": [
    {
      "path": "/run/media/kmosoti/data/FabricO11y/results/service-opening-candidate/resource-containment/fabric-work-181b31cd11ee48bf92527e280baa7c8e.json",
      "sha256": "e407629b0d3fbb1d3aee50dc01ee6ba42a3080938835f27ec5bd7a8a5cf0b426",
      "exit": 1,
      "stop_confirmed": true,
      "retained_failure_evidence": "/run/media/kmosoti/data/FabricO11y/evidence/fabric-work-181b31cd11ee48bf92527e280baa7c8e"
    }
  ]
}

results/service-opening-candidate/installation-custody-prefix-red-01.log

SHA-256 f83171fa88782036e7c1c5f69b496bd8afe6aff0f35a7d27d3793af1fbf2fd1c, 1523 bytes.

Running as unit: fabric-work-181b31cd11ee48bf92527e280baa7c8e.service
resource group: /user.slice/user-1000.slice/[email protected]/app.slice/fabric-work-181b31cd11ee48bf92527e280baa7c8e.service; memory.max=21474836480; swap.max=0
test_archived_leading_lost_line_cannot_escape_source_conservation (test_custody_witness.CustodyWitnessControls.test_archived_leading_lost_line_cannot_escape_source_conservation) ... FAIL

======================================================================
FAIL: test_archived_leading_lost_line_cannot_escape_source_conservation (test_custody_witness.CustodyWitnessControls.test_archived_leading_lost_line_cannot_escape_source_conservation)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/run/media/kmosoti/data/FabricO11y/scratch/installation-custody-witness/tools/qualification/install/test_custody_witness.py", line 213, in test_archived_leading_lost_line_cannot_escape_source_conservation
    with self.assertRaisesRegex(ValueError, 'source prefix conservation'):
         ~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AssertionError: ValueError not raised

----------------------------------------------------------------------
Ran 1 test in 0.028s

FAILED (failures=1)
          Finished with result: exit-code
Main processes terminated with: code=exited, status=1/FAILURE
               Service runtime: 143ms
             CPU time consumed: 122ms
                   Memory peak: 22.3M (swap: 0B)

results/service-opening-candidate/resource-containment/fabric-work-181b31cd11ee48bf92527e280baa7c8e.json

SHA-256 e407629b0d3fbb1d3aee50dc01ee6ba42a3080938835f27ec5bd7a8a5cf0b426, 1913 bytes.

{
  "unit": "fabric-work-181b31cd11ee48bf92527e280baa7c8e",
  "command": [
    "env",
    "PYTHONPATH=tools/qualification/install:tools/qualification:tools",
    "python3",
    "-B",
    "-m",
    "unittest",
    "-v",
    "test_custody_witness.CustodyWitnessControls.test_archived_leading_lost_line_cannot_escape_source_conservation"
  ],
  "exit": 1,
  "wrapper_exit": 1,
  "command_receipt": {
    "unit": "fabric-work-181b31cd11ee48bf92527e280baa7c8e",
    "command": [
      "env",
      "PYTHONPATH=tools/qualification/install:tools/qualification:tools",
      "python3",
      "-B",
      "-m",
      "unittest",
      "-v",
      "test_custody_witness.CustodyWitnessControls.test_archived_leading_lost_line_cannot_escape_source_conservation"
    ],
    "cgroup": "/sys/fs/cgroup/user.slice/user-1000.slice/[email protected]/app.slice/fabric-work-181b31cd11ee48bf92527e280baa7c8e.service",
    "state": "completed",
    "exit": 1,
    "resource_observation": "command_return_before_service_stop",
    "resources": {
      "memory.peak": "23478272",
      "memory.events": "low 0\nhigh 0\nmax 0\noom 0\noom_kill 0\noom_group_kill 0\nsock_throttled 0",
      "cpu.stat": "usage_usec 117109\nuser_usec 97360\nsystem_usec 19748\nnice_usec 0\ncore_sched.force_idle_usec 0\nnr_periods 0\nnr_throttled 0\nthrottled_usec 0\nnr_bursts 0\nburst_usec 0"
    }
  },
  "stop_confirmed": true,
  "stop_error": null,
  "started_unix": 1791867135.686932,
  "elapsed_s": 0.15711379051208496,
  "storage_root": "/run/media/kmosoti/data/FabricO11y",
  "temporary": "/run/media/kmosoti/data/FabricO11y/scratch/work-ep3ok399",
  "temporary_removed": true,
  "retained_failure_evidence": "/run/media/kmosoti/data/FabricO11y/evidence/fabric-work-181b31cd11ee48bf92527e280baa7c8e",
  "memory_high_bytes": 17179869184,
  "memory_max_bytes": 21474836480,
  "swap_max_bytes": 0,
  "runtime_max_seconds": 1800,
  "delegated": false
}