Learn how GitHub Copilot CLI and AI agents automatically test tutorials, prevent documentation drift, and improve open-source onboarding.

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The Drasi team (a CNCF sandbox project at Microsoft Azure) built an AI-powered documentation testing system using GitHub Copilot CLI, Dev Containers, GitHub Actions, and Playwright. The system deploys a 'synthetic user' agent that reads tutorials literally, executes every command, and verifies expected outputs — mimicking a new developer with no prior context. Running weekly across isolated containers, the agent found 18 distinct issues including implicit dependencies, missing verification steps, and format drift. The security model isolates the agent inside ephemeral Dev Containers with minimal PAT permissions. The approach converts documentation maintenance from a manual chore into an automated monitoring problem, effectively giving a four-person team a tireless QA engineer.

How Drasi used GitHub Copilot to find documentation bugs

The problem: Why does documentation break?