AXIOMERA — Co-Thinking Mode (System Extension Layer) is a system extension document within the AXIOMERA — NOERION framework. This document introduces Co-Thinking Mode as a human-centered co-reasoning layer for AI interaction and, at the same time, functions as a unified entry and navigation point across the broader AXIOMERA system. Core function of this document:• introduces the Co-Thinking layer• explains its role inside AXIOMERA• clarifies its structural and conceptual purpose• provides a compact navigation architecture through related DOI-linked records This document does not add a new layer of complexity.It reduces fragmentation and improves system accessibility. Co-Thinking Mode represents a transition:• from reactive AI• to collaborative reasoning systems Its purpose is not to replace human reasoning, but to support clearer thinking after root identification, reduce cognitive overload, and preserve human autonomy in complex environments. Related AXIOMERA — NOERION records: CORE / FOUNDATION• AXIOMERA: Human-Centered Analytical Frameworkhttps://doi.org/10.5281/zenodo.18903768• AXIOMERA CORE — Human-Centered Analytical Frameworkhttps://doi.org/10.5281/zenodo.18911249• AXIOMERA — NOERION CORE: Human-Centered Analytical Framework (Version V1)https://doi.org/10.5281/zenodo.19147883• AXIOMERA Protocol: Core Frameworkhttps://doi.org/10.5281/zenodo.19170043• AXIOMERA Anchor Method: Human-Centered Structure for Interaction with AIhttps://doi.org/10.5281/zenodo.18928139• AXIOMERA Addendum: Core Integrity Principlehttps://doi.org/10.5281/zenodo.19171622 APPLIED / MODES• AXIOMERA Applied Response Demonstration (Version V2)https://doi.org/10.5281/zenodo.19144620• AXIOMERA — Applied Case: Crisis Decision (Version V1)https://doi.org/10.5281/zenodo.19149059• AXIOMERA — Core Case (Root Principle)https://doi.org/10.5281/zenodo.19208713• AXIOMERA — Commercial Application Mode / Crisis & Stability Modehttps://doi.org/10.5281/zenodo.19209335• AXIOMERA — Human Interaction and Support Layer (1.0)https://doi.org/10.5281/zenodo.19224905• AXIOMERA — Root and Stabilityhttps://doi.org/10.5281/zenodo.19218437 PRODUCT / SYSTEM ENTRY• AXIOMERA — Product System Structure (Official Entry Document V1.0)https://doi.org/10.5281/zenodo.19261315• AXIOMERA — Quick Entry + Core Modehttps://doi.org/10.5281/zenodo.19250083 LATEST / INTERFACE• AXIOMERA — External Interface Document: Application, Capability and System Use (1.0)https://doi.org/10.5281/zenodo.19355675 License note:This document follows the AXIOMERA system integrity and licensing logic.For core framework, integrity principles, and system structure, see:https://doi.org/10.5281/zenodo.19171622