Discover powerful TypeScript static analysis tools and techniques in this conference talk from All Things Open 2022. Explore the latest developments in open-source TypeScript tooling, including typescript-eslint for detecting real bugs, eslint-plugin-expect-type for enforcing type expectations, ts-prune for identifying unused code, and TypeStat for improving JavaScript to TypeScript conversions. Gain insights into the TypeScript "program" and "language service" APIs that power these tools, and learn how they work together to provide valuable information. Enhance your TypeScript development skills and leverage these hidden gems to improve code quality, catch errors early, and streamline your workflow.