# Loop Engineering > Companion site for Loop Engineering by Dr. Fabio Correa, DBA: a practical framework for building real-world AI systems. Each canonical page below has a source-derived Markdown representation for retrieval and citation. ## Canonical pages - [Chapter Resources - Loop Engineering](https://le.correax.com/ch/index.md): Per-chapter companion resources for Loop Engineering: cited works, primary-source links, worked-example assets. - [Chapter 1 - The Convergence | Loop Engineering](https://le.correax.com/ch1/index.md): Companion resources for Chapter 1 of Loop Engineering: the four-practice convergence on the same seven design commitments. - [Chapter 10 - The Nervous System (MCP and Protocol Interop) | Loop Engineering](https://le.correax.com/ch10/index.md): Companion resources for Chapter 10: what MCP is, why protocols matter, and a live MCP server catalog. - [Chapter 11 - The Full Sensorimotor Loop | Loop Engineering](https://le.correax.com/ch11/index.md): Companion resources for Chapter 11: end-to-end task walkthrough from user intent to result, with discipline at each handoff. - [Chapter 12 - Failure Modes by Region | Loop Engineering](https://le.correax.com/ch12/index.md): Chapter 12 companion - the failure-pattern map for which cognitive region is failing when something misbehaves, plus grounding operator-burden literature. - [Chapter 13 - The Materiality Dial | Loop Engineering](https://le.correax.com/ch13/index.md): Companion resources for Chapter 13: the 3×3 materiality dial (stakes × autonomy posture), trust-calibration grounding, and per-domain extended patterns. - [Chapter 14 - Beyond Coding (The Architecture in Other Domains) | Loop Engineering](https://le.correax.com/ch14/index.md): Companion resources for Chapter 14: the architecture applied to healthcare, legal, policy, and education - same five regions, different content. - [Chapter 15 - The Architecture Above the Individual | Loop Engineering](https://le.correax.com/ch15/index.md): Companion resources for Chapter 15: fleet bus, shared memory, capability marketplace, and cultural transmission across instances. - [Chapter 16 - Responsible AI, Ethics, and Calibrated Reliance | Loop Engineering](https://le.correax.com/ch16/index.md): Companion resources for Chapter 16: RAI principles mapped to architectural layers, calibrated-reliance grounding, cross-disciplinary reading paths. - [Chapter 2 - A Brief History of Talking to Machines | Loop Engineering](https://le.correax.com/ch2/index.md): Companion resources for Chapter 2 of Loop Engineering: compilers, batch workflows, dialog, agents, loops, and the cognitive-load matrix per era. - [Chapter 3 - A Brief History of Human Loops | Loop Engineering](https://le.correax.com/ch3/index.md): Companion resources for Chapter 3 of Loop Engineering: PDCA, OODA, double-loop learning, reflective practice, experiential learning, and what each tradition lets you change after the evidence returns. - [Chapter 4 - The Brain + Body Mental Model | Loop Engineering](https://le.correax.com/ch4/index.md): Companion resources for Chapter 4 of Loop Engineering: the cognitive-neuroscience mental model that organizes the four-layer architecture. - [Chapter 5 - Prefrontal Cortex (Reasoning + Metacognition) | Loop Engineering](https://le.correax.com/ch5/index.md): Chapter 5 companion - deliberation loop (reasoning models) and critical-thinking loop (ACT metacognition), plus a reasoning-model vendor matrix. - [Chapter 6 - Working Memory and the Scaffolding Loop | Loop Engineering](https://le.correax.com/ch6/index.md): Chapter 6 companion - NOTES.md as externalized scratchpad, seven design commitments in operational form, and loopmaxxing failure modes. - [Chapter 7 - Long-term Memory and Consolidation | Loop Engineering](https://le.correax.com/ch7/index.md): Chapter 7 companion - memory tiers (user, session, repo, episodic), consolidation as sleep-equivalent, and the second cycle that builds the brain. - [Chapter 8 - Dialog Interface (What the AI Implements) | Loop Engineering](https://le.correax.com/ch8/index.md): Companion resources for Chapter 8: AI-side disciplines at the dialog layer - intent modeling, faithfulness signals, clarification offers, dialog repair. - [Chapter 9 - Motor + Sensory (Agents and Computer Use) | Loop Engineering](https://le.correax.com/ch9/index.md): Companion resources for Chapter 9: the sensorimotor loop and the autonomous-agency pattern. Vendor matrix for agents and computer-use surfaces lives here. - [Errata - Loop Engineering](https://le.correax.com/errata/index.md): Living errata for Loop Engineering. Submit corrections via email; accepted updates are logged here. - [Dialog Worked Example - Loop Engineering](https://le.correax.com/examples/dialog/index.md): A full intent-clarification dialog transcript. Companion to Chapter 8. - [Failure-Diagnosis Worked Example - Loop Engineering](https://le.correax.com/examples/failure-diagnosis/index.md): A region-by-region diagnostic walkthrough of a real incident. Companion to Chapter 12. - [Worked Examples - Loop Engineering](https://le.correax.com/examples/index.md): Deeper-than-print worked examples for each region of the brain + body architecture. - [Sensorimotor Worked Example - Loop Engineering](https://le.correax.com/examples/sensorimotor/index.md): Agent action log with side-effect annotations and a confirmation-gate sequence. Companion to Chapter 9. - [Working-Memory Worked Example - Loop Engineering](https://le.correax.com/examples/working-memory/index.md): A full scaffolding-loop trace with NOTES.md state captured at each iteration. Companion to Chapter 6. - [Fleet, Memory, Culture - Loop Engineering](https://le.correax.com/fleet/index.md): Alex ACT fleet layer and Mall catalog - the Core-led plugin constellation that implements the fleet layer from Chapter 15. - [Loop Engineering - Companion Site](https://le.correax.com/index.md): Companion site to Loop Engineering: A Better Way to Think, Create, and Work with AI. Chapter resources, worked examples, prompts, and vendor matrices. - [Materiality Dial - Calibration Patterns by Domain | Loop Engineering](https://le.correax.com/materiality/index.md): Extended materiality-dial calibration patterns by stakes and by industry domain. Reads alongside Chapter 13. - [Agents and Computer Use - Vendor Capability Matrix | Loop Engineering](https://le.correax.com/matrices/agents/index.md): Capability matrix for agent and computer-use surfaces - confirmation gates, monitor models, sandboxing, public availability. Verified 2026-06. - [Vendor Capability Matrices - Loop Engineering](https://le.correax.com/matrices/index.md): Current vendor capability matrices for reasoning models, agents, and MCP adopters. Quarterly refresh cadence so freshness is visible. - [Reasoning Models - Vendor Capability Matrix | Loop Engineering](https://le.correax.com/matrices/reasoning/index.md): Capability matrix for reasoning models - visible chain, thinking budget, cost variance, faithfulness caveats, recommended materiality range. Verified 2026-06. - [MCP Server Catalog - Loop Engineering](https://le.correax.com/mcp/index.md): Catalog of Model Context Protocol servers - vendor adopters, community projects, capability notes, client compatibility. Verified 2026-06. - [Seven Design Commitments - Loop Engineering](https://le.correax.com/primitives/index.md): Market terminology mapped to Loop Engineering - [Dialog-Layer Prompts - Loop Engineering](https://le.correax.com/prompts/dialog/index.md): Intent-clarification, assumption-surfacing, and dialog-repair templates for the dialog interface layer. - [Failure-Diagnosis Prompts - Loop Engineering](https://le.correax.com/prompts/failure-diagnosis/index.md): Region-by-region diagnostic probes for naming which architectural layer failed when something misbehaves. - [Prompts Library - Loop Engineering](https://le.correax.com/prompts/index.md): Practitioner prompts that operationalize each architectural layer. Dated, version-pinned, copy-paste-ready. - [Materiality Prompts - Loop Engineering](https://le.correax.com/prompts/materiality/index.md): Stakes-assessment and autonomy-posture-selector prompts for calibrating loop discipline to materiality. - [Working-Memory Prompts - Loop Engineering](https://le.correax.com/prompts/working-memory/index.md): NOTES.md template, scaffolding-loop contract, verifiable-stop checklist - operational prompts for the working-memory layer. - [Responsible AI - Loop Engineering](https://le.correax.com/responsible-ai/index.md): Extended cross-disciplinary reading paths and the operator obligations checklist that complement Chapter 16.