Identity and robustness control observers (BL-69)

scpn_quantum_control.identity_observer_product maps the existing identity robustness certificate, coherence budget, and optional CHSH witness into one fail-closed BL-33/BL-67 control decision.

Safety contract

Input	Existing authority	Trip behavior
Energy gap / transition probability	identity.robustness	Hold outside explicit thresholds
Planned-depth fidelity	identity.coherence_budget	Hold below fidelity or beyond budget
Optional CHSH witness	identity.entanglement_witness	Hold below threshold; abort if requested but unsupported
Cryptographic seal	BL-48 pointer only	No key or strength claim

Thresholds are always supplied by the caller; this product does not invent a universal identity criterion.

import numpy as np

from scpn_quantum_control.identity_observer_product import (
    IdentityObserverThresholds,
    evaluate_identity_safety,
)

decision = evaluate_identity_safety(
    np.array([[0.0, 0.4], [0.4, 0.0]]),
    np.array([-0.1, 0.1]),
    thresholds=IdentityObserverThresholds(
        min_energy_gap=0.1,
        max_transition_probability=0.1,
        min_coherence_fidelity=0.5,
    ),
    planned_depth=2,
    n_qubits=2,
)
assert decision.action in {"continue", "hold", "abort"}

Unsuitable interpretations

The public API lists the negative-space scenarios through identity_observer_unsuitable_scenarios(). These observers are not evidence of unbreakable identity, hardware robustness, cryptographic strength, consciousness, personhood, or clinical state. Failure to violate CHSH also does not establish the absence of every form of entanglement.

Authored by Anulum Fortis & Arcane Sapience (protoscience@anulum.li)