PHILIA OS Phase 2 CEI Engine Pilot: Pre-Registration of 8-Dimensional Fingerprint and Level 2 Engineering Validation Gate (92nd DOI)

This document constitutes the 92nd pre-registration in the PHILIA OS research series (Trinity AI Research Team, Konyang University). It reports the design decisions, empirical pilot results (v2.1–v2.8), and formally pre-registers the confirmatory experiment for the Phase 2 CEI (C/Excitatory/Inhibitory) Minimal Engine. The central finding: the CEI minimal engine (Port A, production coupling) produces an 8-dimensional fingerprint vector whose Poincaré return-map features (seq_AC1, SD1/SD2) fall outside the range achievable by any AR(1) process, providing evidence of information beyond AC1. This constitutes passage of Engineering Validation Ladder Level 2 for the pilot substrate set. Research journey documented: Phase 2-E biosignal exploration (Experiments 2–8b) → Experiment X (IBI DTW AUC 0.96–0.98 vs PHILIA 0.81–0.86; 5 methodological bugs identified and corrected) → v9/v32 engine dissection (C variable undefined; SR→1 mathematically inevitable; Self-Correction #31) → 7 failed cycle engine prototypes → ANS engine success (philia_ans_final.py, 224 cycles) → CEI minimization → 8-pilot iterations (v2.1–v2.8) → Level 2 PASS. Key result: Rössler attractor produces seq_AC1 = −0.204 (all AR(1) substrates yield positive values) and SD1/SD2 = 1.230 (all AR(1) substrates yield values < 1.0). Both values are structurally unreachable by any AR(1) process regardless of φ. Pre-registration violations: 0. Cumulative self-corrections: 27. 5-AI adversarial review (Chris/Claude Opus Gate-0): LEVEL 2 PASS (2026-07-02). Preceding DOI: 10.5281/zenodo.20902794 (91st — Phase 2 Direction Declaration).