AI's capability to write code is now commonplace, but gaps remain in planning, security, compliance, and deployment. To address this, GitLab launched the Duo Agent Platform, inviting developers to build AI agents that assist teams in shipping secure software faster rather than merely answering questions. A hackathon, co-sponsored by Google Cloud and Anthropic, ran from February to March 2026, attracting nearly 7,000 developers who created over 600 agents and flows. The competition focused on technical work, design, potential impact, and idea quality, with judges dedicating significant time to reviewing submissions.The Grand Prize was awarded to LORE, a system designed to combat knowledge loss when senior engineers depart, utilizing eight agents to manage organizational records and a visual dashboard. Google Cloud's Grand Prize went to Gitdefender, an agent that automatically identifies and fixes security issues within code reviews. Anthropic's Grand Prize winner, GraphDev, maps code relationships and visualizes system changes over time, providing insights into the impact of modifications.Other notable projects included Time-Traveler for technically impressive database migrations, RedAgent for verifying AI-generated security reports, and Launch Control for its ease of use and polished user experience. The hackathon also emphasized sustainability, with several projects receiving awards for measuring and reducing the carbon footprint of software development. Honorable mentions were given to projects like SecurityMonkey for vulnerability testing and stregent for mobile-first CI/CD management. The success of the hackathon highlights the community's drive to solve real-world problems with AI agents, setting the stage for future developments with richer local context. Developers are encouraged to build their own agents and explore the existing AI Catalog.