The latest articles on DEV Community by Ruben Santos (@rmssantos). https://dev.to/rmssantos https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.us-east-2.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F4073739%2F8ea96e54-89ea-4749-bcd5-7709017c3650.png https://dev.to/rmssantos en Ruben Santos Tue, 11 Aug 2026 21:05:17 +0000 https://dev.to/rmssantos/i-built-a-free-ab-620-hands-on-lab-for-copilot-studio-1mmj https://dev.to/rmssantos/i-built-a-free-ab-620-hands-on-lab-for-copilot-studio-1mmj <p>Certification prep often stops at notes and multiple-choice questions. Copilot Studio makes more sense once you actually build something.</p> <p>So I added a free AB-620 hands-on lab to Examplar.</p> <p>It covers creating an agent, writing clear instructions, testing in-scope and out-of-scope prompts, publishing it, and cleaning up afterwards. Each step includes something learners can check before moving on.</p> <p>The public Preview also has 25 original practice questions. No exam dumps.</p> <p>Examplar is my independent, open-source side project. The Preview and lab are free, and the page also links to optional paid packs.</p> <p>Try the free lab: <a href="https://examplar.app/exams/ab620/#labs-h" rel="noopener noreferrer">https://examplar.app/exams/ab620/#labs-h</a></p> <p>Blunt feedback is welcome. Which hands-on scenario should I add next?</p> showdev opensource learning ai