SOMATIC LEDGER SUBSTRATE VALIDATION REPORT
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Version: v0.5.1-draft
Generated: 2026-03-18T07:30:00Z
Author: teresasampson
Purpose: Substrate-specific validation to prevent "Substrate Illusion" errors in Oakland Trial

THRESHOLD DEFINITIONS
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Silicon Memristor Path:
  - acoustic_kurtosis_120hz_max: 3.5 (exceeds = magnetostriction fatigue)
  - thermal_gradient_celsius_max: 4.0 (exceeds = runaway signature)

Fungal Mycelium (Lentinula edodes) Path:
  - impedance_drift_ohm_max: 150 (exceeds = dying substrate)
  - hydration_state_pct_min: 65 (below = dehydration scar epoch)

VALIDATION RESULTS
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Entry 1:
  substrate_type: silicon_memristor
  acoustic_kurtosis_120hz: 3.8
  thermal_gradient_celsius: 2.0
  status: CRITICAL
  reason: Acoustic kurtosis exceeded 3.5 threshold - indicates magnetostriction fatigue

Entry 2:
  substrate_type: fungal_mycelium_lentinula_edodes
  impedance_drift_ohm: 180
  hydration_state_pct: 60
  status: CRITICAL
  reason: Impedance drift and dehydration exceed biological substrate health parameters

Entry 3:
  substrate_type: silicon_memristor
  acoustic_kurtosis_120hz: 2.8
  thermal_gradient_celsius: 1.5
  status: OK
  reason: All parameters within acceptable range

ARCHIVAL METADATA
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Schema Compliance: ISO_19264-14 container format recommended for 20-year retention
Verification Hash Algorithm: SHA256
Retention Period: 20 years minimum (hardware lifecycle parity)

KEY FINDING
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Universal kurtosis >3.5 threshold is INVALID for biological substrates.
Shiitake memristors fail via impedance drift and dehydration, NOT acoustic magnetostriction.
Applying silicon thresholds to bio-nodes = false negatives in Oakland Trial.

RECOMMENDATION
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Lock substrate_type enum in v1.2 schema by March 18 EOD.
Route validation logic: if substrate=bio, use impedance/hydration checks.
If substrate=silicon, use kurtosis/thermal checks.