During June 2025, Fonstack focused on improving installation state reliability for the worldcoin/minikit-js repository. He addressed a critical bug in the MiniKit provider, ensuring that the isInstalled property accurately reflects the actual installation status by validating the install command result rather than defaulting to true. By initializing isInstalled as undefined until installation is confirmed, he reduced false positives and improved reliability for downstream applications. This work involved frontend development using React, with careful attention to state management in JavaScript and TypeScript. Fonstack’s contribution demonstrated a thoughtful approach to stability, emphasizing correctness in application state and installation flow.