Energy Filament Theory (EFT) A6: Cross-Probe Dispersionless Common Term Protocol Family — Alignment, Permutation Nulls, and Zero-Lag Co-Occurrence

This record publishes EFT-A6, the “Cross-Probe Dispersionless Common Term Protocol Family” in the EFT methods-layer protocol library. A6 standardizes an auditable workflow to extract and align a scalar common term C(t,θ,z) across independent probe residuals under a unified external timebase, and hard-locks three guardrails: achromaticity (dispersion-free behavior), zero-lag co-occurrence (Z0), and environment-predictable structure. It defines two canonical workflows: A6-P1 (cross-probe corroboration on the same path/corridor) and A6-P2 (differential corridor / controlled multipath for support or upper bounds), and provides a Minimal Artifacts checklist and an Audit Hook block aligned to Z13/T1.