| # STUDY CASE: MnemoCore Phase 3.0 – The Adaptive Engine | |
| ## 1. Executive Summary: From Prototype to Cognitive OS | |
| This study case documents the architectural evolution of **MnemoCore (Infrastructure for Persistent Cognitive Memory)** from a Phase 2.0 research prototype to a Phase 3.0 production-grade Cognitive Operating System. | |
| The core mission is to solve the "Scalability vs. Agency" paradox: How to maintain a coherent, high-dimensional memory for an autonomous agent that grows indefinitely on consumer-grade hardware (32GB RAM) without sacrificing real-time inference or kognitive stability. | |
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| ## 2. The Architectural Consensus | |
| Based on a cross-model technical review (Advanced Reasoning Models), four critical pillars have been identified for the "Adaptive Engine" upgrade. | |
| ### Pillar I: Robust Binary VSA (Vector Symbolic Architecture) | |
| The system transitions from 10,000-D bipolar vectors to **16,384-D (2^14) Binary Vectors**. | |
| * **The Problem:** Naive XOR-binding in low dimensions leads to "information collapse" and high collision rates in complex thought bundles. | |
| * **The Consensus Solution:** | |
| * Increase dimensionality to **16k** to maximize entropy. | |
| * Implement **Phase Vector Encoding**: Using dual vectors (Positive/Negative phase) to allow the representation of semantic opposites—a feature typically lost in pure binary space. | |
| * **Result:** 100x speed increase using hardware-native bitwise XOR and `popcount` (Hamming distance). | |
| ### Pillar II: Tri-State Memory Hierarchy (Memory Tiering) | |
| To achieve $O(log N)$ query speed, a biological-inspired storage hierarchy is implemented. | |
| * **HOT (The Overconscious):** RAM-resident dictionary (Top 2,000 nodes). Zero-latency access. | |
| * **WARM (The Subconscious):** SSD-resident HNSW index using **Memory-Mapping (mmap)**. This allows the OS to handle caching between RAM and Disk intelligently. | |
| * **COLD (The Archive):** Compressed JSONL on disk for deep training and long-term history. | |
| * **Hysteresis Layer:** To prevent "boundary thrashing" (nodes jumping between RAM and Disk), a soft boundary is implemented where a node needs a significant salience delta to change tiers. | |
| ### Pillar III: Biological LTP (Long-Term Potentiation) | |
| Memory retention is shifted from a linear decay model to a biologically plausible reinforcement model. | |
| * **New Formula:** $S = I \times \log(1+A) \times e^{-\lambda T}$ | |
| * $I$: Initial importance. | |
| * $A$: Successful retrieval count (Logarithmic reinforcement). | |
| * $e^{-\lambda T}$: Exponential decay. | |
| * **Consolidation Plateau:** Once a memory reaches the "Permanence Threshold," it enters a structural phase-transition where it becomes immune to decay—forming the "Core Identity" of the agent. | |
| ### Pillar IV: UMAP Cognitive Landscape | |
| * **The Decision:** Replace t-SNE with **UMAP (Uniform Manifold Approximation)**. | |
| * **Rationale:** UMAP is significantly faster for large datasets and preserves the global structure of the memory space better than t-SNE. This allows the User to visualize "Concept Clusters" and identify "Cognitive Drift" in real-time. | |
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| ## 3. Implementation Roadmap (Phase 3.0) | |
| | Stage | Component | Objective | | |
| | :--- | :--- | :--- | | |
| | **01** | **Binary Core** | Implement `BinaryHDV` class with 16k dimension and XOR-binding. | | |
| | **02** | **Tier Manager** | Refactor `engine.py` with `MemoryTierManager` and mmap support. | | |
| | **03** | **LTP Logic** | Deploy the exponential decay and consolidation plateau. | | |
| | **04** | **VIZ Hub** | Build the UMAP visualization dashboard for memory auditing. | | |
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| ## 4. Conclusion | |
| The MnemoCore Phase 3.0 architecture represents a shift toward **Sovereign Intelligence**. By separating the mathematical logic (Binary VSA) from the biological intent (LTP Decay), we create a system that doesn't just store data—it *evolves* with the user. | |
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| *Documented by MnemoCore Architect & User* | |
| *Date: 2026-02-12* | |