{
  "claim": "Ground evidence for preserving and localizing the failed stage of one command-to-result operation across an isolated mission-runtime restart.",
  "created_at_utc": "2026-08-25T17:46:00.506431+00:00",
  "experiment": "persistent-operation-trace-v1",
  "limitations": [
    "This is a ground process experiment, not a spacecraft or flight result.",
    "The lifecycle and faults are controlled injections; they do not use a commercial flight-software stack, radio, or operator command system.",
    "The watchdog restarts an isolated mission-runtime process. It does not power-cycle or reboot the Jetson operating system.",
    "The persistent journal is fsynced to the host filesystem, but whole-board power-loss behavior remains untested.",
    "The evaluator is deterministic and abstaining. No language model or autonomous command path is evaluated.",
    "The 2 KiB retrieval budget is an experimental constraint, not a flight allocation."
  ],
  "protocol": {
    "failed_stages": [
      "command_validation",
      "mode_transition",
      "payload_execution",
      "artifact_persistence",
      "downlink_delivery"
    ],
    "faults": [
      "command_rejected",
      "mode_entry_timeout",
      "payload_watchdog_reset",
      "artifact_write_failure",
      "downlink_ack_timeout"
    ],
    "negative_controls": 5,
    "post_boot_application_logs": 96,
    "primary_budget_bytes": 2048,
    "repetitions_per_fault": 5,
    "retrieval_budgets_bytes": [
      512,
      1024,
      2048,
      4096
    ],
    "sample_interval_ms": 10.0,
    "stage_delay_ms": 30.0,
    "trial_order": "one clean control followed by a rotating fault order per repetition",
    "watchdog_deadline_ms": 120.0,
    "watchdog_resets_per_trial": 2
  },
  "results": {
    "by_fault": {
      "artifact_write_failure": {
        "expected_failed_stage": "artifact_persistence",
        "operation_trace_correct_at_2048": 5,
        "trials": 5
      },
      "command_rejected": {
        "expected_failed_stage": "command_validation",
        "operation_trace_correct_at_2048": 5,
        "trials": 5
      },
      "downlink_ack_timeout": {
        "expected_failed_stage": "downlink_delivery",
        "operation_trace_correct_at_2048": 5,
        "trials": 5
      },
      "mode_entry_timeout": {
        "expected_failed_stage": "mode_transition",
        "operation_trace_correct_at_2048": 5,
        "trials": 5
      },
      "payload_watchdog_reset": {
        "expected_failed_stage": "payload_execution",
        "operation_trace_correct_at_2048": 5,
        "trials": 5
      }
    },
    "incident_trials": 25,
    "journal_integrity": {
      "trials": 30,
      "valid": 30
    },
    "negative_controls": {
      "false_localizations_at_2048": {
        "application_log_tail": 0,
        "operation_trace": 0,
        "uniform_telemetry": 0
      },
      "trials": 5
    },
    "retrieval_comparison": {
      "application_log_tail": {
        "by_budget": {
          "1024": {
            "accuracy": 0.8,
            "correct": 20,
            "median_wire_bytes": 879.0,
            "trials": 25
          },
          "2048": {
            "accuracy": 0.8,
            "correct": 20,
            "median_wire_bytes": 879.0,
            "trials": 25
          },
          "4096": {
            "accuracy": 1.0,
            "correct": 25,
            "median_wire_bytes": 879.0,
            "trials": 25
          },
          "512": {
            "accuracy": 0.8,
            "correct": 20,
            "median_wire_bytes": 496.0,
            "trials": 25
          }
        },
        "smallest_budget_all_trials_correct": 4096
      },
      "operation_trace": {
        "by_budget": {
          "1024": {
            "accuracy": 1.0,
            "correct": 25,
            "median_wire_bytes": 510.0,
            "trials": 25
          },
          "2048": {
            "accuracy": 1.0,
            "correct": 25,
            "median_wire_bytes": 510.0,
            "trials": 25
          },
          "4096": {
            "accuracy": 1.0,
            "correct": 25,
            "median_wire_bytes": 510.0,
            "trials": 25
          },
          "512": {
            "accuracy": 1.0,
            "correct": 25,
            "median_wire_bytes": 495.0,
            "trials": 25
          }
        },
        "smallest_budget_all_trials_correct": 512
      },
      "uniform_telemetry": {
        "by_budget": {
          "1024": {
            "accuracy": 0.8,
            "correct": 20,
            "median_wire_bytes": 1014.0,
            "trials": 25
          },
          "2048": {
            "accuracy": 0.8,
            "correct": 20,
            "median_wire_bytes": 1044.0,
            "trials": 25
          },
          "4096": {
            "accuracy": 0.8,
            "correct": 20,
            "median_wire_bytes": 1044.0,
            "trials": 25
          },
          "512": {
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            "median_wire_bytes": 497.0,
            "trials": 25
          }
        },
        "smallest_budget_all_trials_correct": null
      }
    },
    "runtime_restart": {
      "trials": 5,
      "trials_recovered": 5,
      "trials_spanning_expected_boot_ids": 5,
      "trials_with_expected_restarts": 5
    }
  },
  "runtime": {
    "host_boot_id": "e4f2f4bb-a993-4802-a7ba-8e265c0805c6",
    "jetson_release": "# R36 (release), REVISION: 4.4, GCID: 41062509, BOARD: generic, EABI: aarch64, DATE: Mon Jun 16 16:07:13 UTC 2025\n# KERNEL_VARIANT: oot\nTARGET_USERSPACE_LIB_DIR=nvidia\nTARGET_USERSPACE_LIB_DIR_PATH=usr/lib/aarch64-linux-gnu/nvidia",
    "machine": "aarch64",
    "platform": "Linux-5.15.148-tegra-aarch64-with-glibc2.35",
    "python": "3.10.12"
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