Hennouni RSD & BlindZone Demo v1.0: Geometric Floor Measurement and Semantic Blind Zone Detection for Embedding Models (RAG & AI Safety)

This record contains the complete release of two complementary diagnostic tools for embedding models, published together on 14 March 2026. RSD Protocol v1.0 (DOI: 10.5281/zenodo.18939230, 10 March 2026) measures the geometric floor of any embedding model: the minimum non-zero residual cosine distance below which two distinct texts become indistinguishable. Validated on 7 models, sigma < 0.10% over 10 independent runs. BlindZone Demo v1.0 is the operational complement: it tests whether an embedding model correctly distinguishes two semantically opposite critical phrases — affirmation vs. negation — in French and English. Result: 4 models out of 7 fail in French, 3 out of 7 fail in English, including in their native training language. This record contains: Theoretical paper (3 pages): semantic blind zones on critical phrases, binary FR/EN results on 7 models. Specification v1.0 (4 pages): full protocol, binary classification, AI Safety implications for medical, legal and financial sectors. User Guide v1.0 (3 pages): installation, execution, result interpretation. rsd_blindzone_demo_fr.py: French phrase pair test — 7 models. rsd_compare_EN_v1_0.py: English phrase pair test — 7 models. Combined workflow: RSD identifies the geometric floor → BlindZone Demo identifies dangerous phrase pairs → targeted fine-tuning with hard negatives. Estimated gain: 60–80% reduction in correction time vs. blind fine-tuning. Author: Mourad Hennouni (ORCID: 0009-0009-7735-2526) — AI Safety Engineering & Systems Analysis