Reality Substrate Experiment: Quantum Mechanics, Fine-Tuned Existence, Compression of Appearance, and Reality Fabric Chronologies

We present the Reality Substrate Experiment (RSE): a finite discrete world whose ontological micro-layer is quantum-mechanical, hosted as a reproducible laboratory campaign inside an LXC container. Existence of the world is gated by the Fine-Tuning Argument ruleset (doi:10.5281/zenodo.18056682): twenty constants with combined random probability Prandom≈10−120 and design probability Pdesign=1−Prandom≈1. Only the designed/life-permitting branch admits substrate evolution under the default gate (FT5). On that branch we evolve an N-qubit XXZ ring under local unitary dynamics and Markovian Z-dephasing with Kraus parameter p=(1−e−γ)/2 so that pointer coherences decay as e−γt, matching textbook open-system quantum mechanics. We prove and lock in-sim theorems T1–T20 spanning decoherence, Born statistics, CPTP channels, Bell/CHSH at the Tsirelson bound with no-signaling, no-cloning (F=5/6), Leggett–Garg temporal tests, multi-seed replication, scale scans, non-Markovian baths, and classical-observer recoverability. Classical frames admit the Compression Theory block map P⋆ with ηspec=1 and ρ2=ηshape. Observers restricted to compressed frames cannot recover mid-time bipartite entropy Smid (relative error ≈0.55). An ungated control—design gate OFF, 64 random constant draws all admitted— yields zero FT5 hits yet universal Born pass and decohering dynamics: randomness produces many off-window QM histories, not a void. Above the substrate we add Reality Fabric (v1.3.0, seed fabric-torah-gap-v1, decision go, mode gap_adamic): a four-LXC campaign comparing three formation foundations—Designer (fine-tuned physics chronology), Torah gap/Adamic (Genesis 1:1 original creation with unknown duration; 1:2 tohu-bohu; six-day reformation plus Adamic AM ≈5786 y interpretive), and Chaos (random constants, restart-until present-Earth). Designer and Torah gap reach every shared milestone with P≈1.0; Chaos Monte Carlo probabilities fall sharply (forms_light 0.1675 → earth_current_form 0.0 in 2000 samples), with a winner only after 12 205 restart attempts at ~31.07 Gyr. Designer inhabited-Earth age is ~9.56 Gyr; Torah clocks keep Genesis 1:1 latent and report ~7 narrative reformation days. Scope is explicit: in-silico matching of established quantum mechanics, a designed existence calculus, and narrative-mapped structural chronologies inside a simulated laboratory world—not a physical ontology of our universe, not a proof of theology, and not a claim that biblical chronology replaces empirical cosmology. Zenodo deposit note: This deposit is published as v2 (version field 2.0.0). The manuscript itself is paper software/version 2.1.0 (RSE + Reality Fabric v1.3.0), including Designer / Torah gap–Adamic / Chaos fabric chronology results. Scope is in-silico only: matching established QM and narrative-mapped structural chronologies inside a simulated laboratory world—not a physical ontology of our universe and not a theological proof.