In our previous article, we explained what Article 12 requires — the three purposes of logging, the role responsibilities, the biometric exception, and the unresolved GDPR tension. Now the question is: how do you actually build it? Article 12 is a technical construction requirement. That means the answer is not a document — it is an architecture. In this article, we walk through the complete logging system for TalentMatch AI, layer by layer: from infrastructure through event

Your AI system makes thousands of decisions per day. It screens candidates, scores credit applications, flags anomalies, or suggests diagnoses. Now imagine a regulator asks you to reconstruct a single decision from six months ago — the inputs, the logic, the output, and who reviewed it. Can you? That is what Article 12 of the EU AI Act demands. And unlike Article 11, which requires documentation on paper, Article 12 is a technical construction requirement. Your system itself