{
  "schema": "fermata.physical-reply.v4",
  "title": "One physical Received-button exchange: A to B",
  "caption": "Recorded hardware event ledger, 19 October 2026; separate from the wrist-turn recording.",
  "firmware": "A v326 / B v326",
  "direction": "A→B",
  "signal": "Received",
  "packet_identity": {
    "session": 1957751726,
    "seq": 2,
    "code": 2
  },
  "time_basis": "Host monotonic receipt time, relative to the BUTTON_RECEIVED log at 889.974959333 s. These are log-arrival intervals, not measured physical latency.",
  "events": [
    {
      "evidence_key": "button",
      "relative_host_seconds": 0.0,
      "t": 889.974959333,
      "role": "A",
      "name": "BUTTON_RECEIVED",
      "value": "2"
    },
    {
      "evidence_key": "request",
      "relative_host_seconds": 0.001003042,
      "t": 889.975962375,
      "role": "A",
      "name": "REQUEST",
      "session": 1957751726,
      "seq": 2,
      "code": 2,
      "flags": 0,
      "value": 0
    },
    {
      "evidence_key": "RX_ACCEPTED",
      "relative_host_seconds": 0.017873917,
      "t": 889.99283325,
      "role": "B",
      "name": "RX_ACCEPTED",
      "session": 1957751726,
      "seq": 2,
      "code": 2,
      "flags": 0,
      "value": 0
    },
    {
      "evidence_key": "FEEDBACK_HAPTIC_STARTED",
      "relative_host_seconds": 0.019294583,
      "t": 889.994253916,
      "role": "B",
      "name": "FEEDBACK_HAPTIC_STARTED",
      "session": 1957751726,
      "seq": 2,
      "code": 2,
      "flags": 0,
      "value": 0
    },
    {
      "evidence_key": "FEEDBACK_LIGHT_STARTED",
      "relative_host_seconds": 0.020272625,
      "t": 889.995231958,
      "role": "B",
      "name": "FEEDBACK_LIGHT_STARTED",
      "session": 1957751726,
      "seq": 2,
      "code": 2,
      "flags": 0,
      "value": 1500
    },
    {
      "evidence_key": "ACK_DEVICE_DELIVERY",
      "relative_host_seconds": 0.035275917,
      "t": 890.01023525,
      "role": "A",
      "name": "ACK_DEVICE_DELIVERY",
      "session": 1957751726,
      "seq": 2,
      "code": 2,
      "flags": 0,
      "value": 35
    },
    {
      "evidence_key": "HAPTIC_FINISHED_AFTER_START",
      "relative_host_seconds": 0.119120542,
      "t": 890.094079875,
      "role": "B",
      "name": "HAPTIC_FINISHED",
      "value": "224"
    }
  ],
  "sources": [
    {
      "path": "04_固件与手势识别/Fermata_Pair_v0.3.26/results/hardware_20261019/all_physical_presses.json",
      "sha256": "dcdef2010d2764029f3cf8c30a8147c0243c319818d282c54acb42e8400b4bda"
    },
    {
      "path": "04_固件与手势识别/Fermata_Pair_v0.3.26/results/hardware_20261019/human_confirmation.json",
      "sha256": "39100297f62c496d0cd90f5a989cd581cdeb64c2ec5cfad518cd0b6a1242e597"
    }
  ],
  "source_selector": "all_physical_presses.json → A → presses[0]",
  "human_observation": {
    "quote": "两边都正常",
    "meaning": "The author confirmed vibration and green light in both directions during the seven-press check.",
    "scope": "Collective confirmation for A3/B4 physical presses; no per-event sensation timestamp."
  },
  "limits": [
    "Not a response to the selected gesture; this test deliberately presses the Received button.",
    "ACK confirms peer acceptance, not sensation or agreement.",
    "HAPTIC_FINISHED is unkeyed and associated with the following finish within one second of the matched start.",
    "No video or human-observed gesture is reconstructed."
  ]
}