The Cloudflare Workers Builds is a CI/CD product that makes it easy to build and deploy Workers applications. However, the current system had issues with reliability, speed, and user experience due to manual error detection and lack of automation. To address these issues, Cloudflare built an error detection system using the Cloudflare Developer Platform's Durable Objects, Queues, and Workers KV storage. This system uses a queue to process build errors and detects issues in build logs using AI-powered matchers. The system also includes an alarm that runs every second to fetch builds from Postgres and send them to the queue for processing. With this new system, Cloudflare was able to automate error detection, improve reliability, and reduce the time spent on fixing issues. This project demonstrates the power of building on the Cloudflare Developer Platform and showcases the ease with which developers can build and deploy applications using Workers.