The author, a developer at GitLab, uses the GitLab Duo Agent Platform to understand system architecture quickly, which is crucial for their work. The platform automates routine tasks, allowing developers to focus on creative problem-solving and strategic technical work. The author demonstrates how the platform can generate comprehensive documentation for a Golang project's gRPC communication flow. The goal is to create a clear diagram showing the gRPC connection, including payloads, actions, and responses. The author crafts a specific prompt for the Duo Agent Platform, which gathers context, analyzes the codebase, and identifies relevant files. The platform then asks clarifying questions to ensure the deliverable meets the author's requirements. With the requirements clarified, the platform executes the task, providing real-time progress updates and creating a comprehensive mermaid diagram. The resulting documentation is thorough, accurate, and immediately useful for understanding the system architecture. The author is impressed by the level of detail included in the diagram, which would have taken considerable time to extract manually. The GitLab Duo Agent Platform has various use cases, including code reviews, testing, debugging, security scanning, and CI/CD optimization, and will enter public beta soon.