{
  "hardware_capture_date": "2026-09-29",
  "simulation_replay_date": "2026-10-15",
  "board": "Seeed Studio XIAO ESP32-C3",
  "capture": "FX2 logic analyzer at 12 MHz; D4 data, D5 clock, common ground",
  "mode": "single-board loopback: both firmware roles on one MCU",
  "hardware_provenance_commit": "0b4c683482115694d4069fa4cb76eea180c2ce0c",
  "firmware_git_blob": "08f7981ae4cc7541a0bb2b13d1b5b04b32a98937",
  "firmware_provenance": "Current firmware blob matches the binary committed with the original bench capture. Original acquisition did not record a separate flashed-image hash.",
  "simulation_provenance": "Local c3_pin_trace iteration-build executable; not a production service measurement. Repository working tree contains unrelated local changes; HEAD alone does not identify this executable. Binary and translation-library hashes identify the replay artifacts.",
  "simulator_executable_sha256": "8f77e654763283b969dbb3ebdb6a7e2927078ac6097bb6b696f272b5ec747a30",
  "translation_library_sha256": "412b236a7c0107348f2919a2f65442232a0f20ddf1d479c70b20c48dd1159d39",
  "simulated_duration_ms": 1000,
  "files": {
    "hardware.json": "26bb145a7a40fb2f640364962b014db91ec52f982eea54d62703da69c180f588",
    "simulation.json": "a8deceafe452eb32b4b7278da033748cd70a88e7aa520004f5bd7ab33f0fd9fa",
    "bitbang_bus.c": "d4744974c59f275e6c545e5e3e0a707777579f589a30495d35e72472b5189435",
    "firmware.bin": "c244360f26fe796252ef4b75c33a4b22ed14e96548074a5df6e77ab9d547afb4"
  },
  "limitations": [
    "One archived hardware capture and one local simulator replay, not a statistical sample.",
    "Backend executable is not included; published captures reproduce the comparison calculation, not a complete rebuild of the backend.",
    "12 MHz acquisition has approximately 83.3 ns sample spacing.",
    "Alignment removes boot-time offset. Signed offsets are cumulative event offsets, not per-instruction timing or clock-frequency accuracy.",
    "This is a GPIO/protocol loopback workload, not a physical CAN transceiver, RF, OTA, or certification benchmark."
  ]
}