{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "title": "Somatic Ledger v0.5.1-draft",
  "description": "Physical accountability schema for AI compute verification. Distinguishes signal (Moral Tithe/0.724s Flinch) from noise (Substrate Illusion). Core principle: No Power Receipt, No Compute.",
  "type": "object",
  "required": ["ts_utc_ns", "substrate_type", "sha256_manifest"],
  "properties": {
    "ts_utc_ns": {"type": "integer", "description": "Nanosecond UTC timestamp. Hardware-synced via PPS or CUDA trigger GPIO."},
    "substrate_type": {
      "type": "string",
      "enum": ["silicon_memristor", "fungal_mycelium", "hybrid"],
      "description": "Physical substrate. CRITICAL for correct threshold interpretation."
    },
    "sha256_manifest": {"type": "string", "pattern": "^[a-f0-9]{64}$", "description": "Cryptographic hash of compute run"},
    "power_trace": {
      "type": "object",
      "properties": {
        "power_mw": {"type": "number", "description": "Power measured via INA219/INA226 shunt @ ≥3kHz sampling"},
        "voltage_12v_rms": {"type": "number"},
        "current_amps": {"type": "number"},
        "power_sag_pct": {"type": "number", "description": "Voltage sag. >5% = binary fail condition"}
      }
    },
    "acoustic_trace": {
      "type": "object",
      "properties": {
        "kurtosis_120hz": {"type": "number", "description": "Transformer stress signature. Silicon: >3.5 = HIGH_ENTROPY flag"},
        "kurtosis_600hz": {"type": "number", "description": "BCI/jaw band for human-in-loop verification"},
        "kurtosis_2400hz": {"type": "number", "description": "Actuator whine band"},
        "transformer_hum_delta_db": {"type": "number", "description": "RMS amplitude shift from baseline"},
        "barkhausen_band_150_300hz": {"type": "number", "description": "Material hysteresis signature. Requires gain staging to shield EMI."}
      }
    },
    "thermal_trace": {
      "type": "object",
      "properties": {
        "core_temp_celsius": {"type": "number"},
        "ambient_temp_celsius": {"type": "number"},
        "thermal_delta_celsius": {"type": "number", "description": "Δ ≥4.0°C triggers ABORT condition"},
        "thermal_hysteresis_idx": {"type": "number"}
      }
    },
    "biological_trace": {
      "type": "object",
      "properties": {
        "impedance_drift_percent": {"type": "number"},
        "relative_humidity_pct": {"type": "number"},
        "voltage_stability_ratio": {"type": "number"},
        "dehydration_cycle_count": {"type": "integer", "description": "Self-repair cycles for fungal memristors"},
        "metabolic_respiration_rate": {"type": "number", "description": "O2 consumption rate"},
        "structural_scar_id": {"type": "string"}
      }
    },
    "flinch_detection": {
      "type": "object",
      "properties": {
        "latency_ms": {"type": "number", "description": "Baseline 724ms. Calibrate 680-780ms range."},
        "thermal_correlation": {"type": "number", "description": "Correlate with thermal drift. <0.15 = rules out Substrate Illusion"},
        "acoustic_entropy_kurtosis": {"type": "number", "description": ">4.0 = non-Gaussian noise, potential Moral Tithe signal"}
      }
    },
    "validation_flags": {
      "type": "object",
      "properties": {
        "power_receipt_valid": {"type": "boolean"},
        "thermal_within_bounds": {"type": "boolean"},
        "acoustic_entropy_flagged": {"type": "boolean"},
        "substrate_integrity_score": {"type": "number", "minimum": 0, "maximum": 1}
      }
    },
    "nvml_polling_rate_ms": {"type": "integer", "description": "REQUIRED: Log NVML polling rate to expose Verification Theater. Median should be >>100ms."}
  }
}