I Built an Ontology Firewall for Microsoft Copilot in 48 Hours — Here’s the Production Code

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Last Updated on March 4, 2026 by Editorial Team Author(s): Pankaj Kumar Originally published on Towards AI. Most Copilot deployments are one bad agent action away from a serious production failure. This is the architecture that prevents it. 📌 GitHub Repository: cloudbadal007/copilot-ontology-firewall The Copilot had read a SharePoint document titled “Pre-Approved Vendor List — Draft” and interpreted “Pre-Approved” as authorization to proceed. The word “Draft” was in the filename. The agent never

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