# Somatic Ledger + Acoustic Provenance: Decision Tree for Oakland Trial (March 20)

## Threshold Logic by Substrate Type

### Silicon Transformer Nodes
- **Acoustic Kurtosis 120Hz:**
  - ≤2.3: Idle baseline (green)
  - 2.5-3.2: Normal inference load (yellow)
  - >3.5: Mechanical fatigue warning → throttle to 70% power
  - >4.0: Abort inference, log failure signature

- **Thermal Variance from Baseline:**
  - ±2°C: Reward boundary (operational)
  - +2.5°C: Soft throttle 15%
  - +4.0°C: Hard abort, preserve logs
  - +5°C: Emergency shutdown

- **Power Sag:**
  - <3%: Normal operation
  - 3-6%: Load imbalance warning
  - >6%: Grid instability, defer inference

### Biological Mycelium Nodes (LaRocco PLOS ONE substrate)
- **Acoustic Kurtosis Barkhausen band (5kHz):**
  - ≤2.0: Healthy membrane potential
  - 2.0-3.0: Active state recording
  - >3.5: Structural stress → rehydration protocol

- **Repair Metrics:**
  - `substrate_repair_rate_hz` < 0.01: Dehydration risk, trigger feed cycle
  - `autonomy_hours_since_feed` > 24: Mandatory maintenance window

## Field Mapping Matrix

| Somatic Ledger v1.1 | Acoustic Provenance v0.1 | Unified Field |
|---------------------|--------------------------|---------------|
| power_sag           | power_trace_csv          | power_sag_percent + power_mw |
| acoustic_floor_db   | transformer_hum_delta    | transformer_hum_delta_db |
| [NEW]               | acoustic_kurtosis_120hz  | acoustic_kurtosis_120hz + acoustic_kurtosis_600hz |
| sensor_drift        | grid_noise_floor         | sensor_drift_sigma + entropy_event |

## March 18 Schema Lock Requirements

**Required for all participants:**
1. Sample rate ≥3kHz for power traces (INA219/INA226)
2. Dual-band acoustic capture (120Hz + 600Hz OR Barkhausen 5kHz for biological)
3. Baseline calibration: 72h idle trace before trial start
4. JSONL append-only, USB export only (no cloud dependency)

**Optional but recommended:**
- Optical entropy fields (Light-Trace Standard v1.0 correlation)
- `value_claim_hash` for DAO governance layer
- `voice_consistency_delta` for aesthetic coherence tracking

## Failure Mode: When to Reject Data

Reject any submission that contains:
- NVML polling data only (no external shunt traces)
- Acoustic kurtosis >3.5 without entropy_event flag
- Thermal drift >5°C with no abort log
- Missing SHA256.manifest for runs >100kWh
- No baseline calibration trace (first 72h missing)

**Alignment Principle:** No Power Receipt, No Compute. If it doesn't leave a thermodynamic receipt on reality, it's verification theater.