When Does a Physical Interaction Become a Valid Registered Measurement?

A VVV-QMRF Registration-Layer Framework with the K9_E Class C Testable Hypothesis and an Experimental Specification for Extended Wigner's Friend Standard quantum mechanics specifies, via postulate P3, that a measurement yields eigenvalue a_k with probability |<a_k|psi>|^2. What P3 does not specify is when a physical interaction constitutes a valid registered measurement event. This silence generates the von Neumann chain problem and leaves the Heisenberg cut formally undefined. This paper proposes VVV-QMRF (VietVunVut Quantum Measurement Registration Framework): a registration-layer extension of quantum mechanics grounded in Buddhist Pramana epistemology (Dignaga-Dharmakirti tradition). The framework introduces a K-side registration space K, structurally separate from the physical Hilbert space H (K != H), and a six-condition test for valid registered measurement. Applied to Extended Wigner's Friend (EWF) scenarios, this yields the K-side incommensurability conjecture: K_F perp_K K_W. The K-side registration space is axiomatized via eight frozen registration-logic axioms (K1-K8, Layer 1) and nine updatable bridge theorems (T1-T9, Layer 2). T4-H (N-observer colimit existence) has been verified as a full theorem across all four steps (RCA 4.74/5, 2026-05-28). K9_E is the probability postulate (P9): P(o|K) = Tr(E_o rho) * (1 - beta * K_ctx), with a single free parameter beta in [0,1]. At beta=0, K9_E recovers the Born rule exactly. The proposed K9-S12 Modified Bong Protocol (single waveplate at alpha=31 deg) predicts Genuine LF 1 = +0.0891 (8.6 sigma), delta<A1B2> = -0.0355 (20.8 sigma), FOM=8.6. Empirical status (Class C qualified): A genuine non-circular fit to raw Proietti et al. (2019) data yields beta=0.598, V=0.939, Delta-chi^2=5.35 (2.31 sigma). However, v30 noise sensitivity analysis FAIL (noise_threshold=0.10 sigma RMS). Confirmation requires a dedicated K9-S12 photonic EWF experiment. The paper presents three logically independent projects: Project A (BE-QM Comparative Mapping: 30 nodes, 39 edges), Project B (VVV-QMRF Conceptual Framework: K1-K8, T1-T9, phi-map Class D), and Project C (K9_E Testable Hypothesis: Class C qualified). A->B->C is one-way motivation, not logical derivation. A null K9_E result falsifies Project C only. DISCLAIMER: Independent personal research. Not Standard Quantum Mechanics, not peer-reviewed, not experimentally confirmed. Critique explicitly invited.