This document specifies the RIT Protocol 5.3 (Reverse-engineering Integration Therapy), the T1-level biological implementation of the TRIAD 5.3 framework. It mandates a shift from the descriptive medical model of psychiatry to a formal engineering approach, treating the human mind as a dynamic, open dissipative system governed by allostatic growth — the expansion of integrative complexity (Φ) rather than a return to a static baseline. The E‑A‑I Cycle and Allostatic NavigationRIT 5.3 operationalizes the conversion of raw error signals (τ_+) into integrated structural wisdom (τ_*) through the formal Allostatic Reconfiguration Operator (R_it). The therapeutic process follows a recursive cycle: Externalization reduces internal entropy (N) and identifies the Network Gradient (∇_net) — the direction of maximal potential coherence growth. Analysis is gated by the Somatic Prefrontal Gate (PFC_gate), where integration proceeds only when heart‑rate variability and metabolic reserves signal a "Safe‑to‑Process" state. Integration navigates a precision juxtaposition of traumatic expectations and new safety signals, guided by the internal coherence compass. Key Mechanisms and Thermodynamic Governors Metabolic Will (ω): A finite volitional reserve governed by dopaminergic cost‑benefit evaluation. The protocol explicitly accounts for the Masking Tax (ξ_mask) — the metabolic cost of authentic self‑suppression — a primary predictor of clinical burnout. Nonlinear Error Window: Reconsolidation requires a "Golden Window" of prediction error (~25% high‑activation time per session), preventing both under‑activation and retraumatization. Intensity‑Weighted Coding: Synaptic weight updates are driven by event intensity (I = Wsd_inst × A) rather than repetition frequency, enabling rapid integration of deep‑seated engrams. Empirical and Ethical FoundationsThe protocol is anchored by an 11‑year longitudinal case study (CASE T1) documenting prenatal trauma integration without pharmacological intervention. It establishes the Canonical Triad (Acceptance → Trust → Love) as a physical attractor — the most energy‑efficient state for any system minimizing expected free energy — validated through a Consensus audit across five independent hypotheses. By replacing forced positivity with thermodynamic alignment, RIT 5.3 provides a sovereign, falsifiable infrastructure for cognitive health in high‑complexity environments.