During April 2025, Mani Caesar focused on stabilizing UI test integration and framework resolution for Apple platforms in the facebook/buck2-prelude repository. He addressed build reliability issues introduced by Xcode 16.3 by updating Apple build rules to dynamically locate the XCUIAutomation framework in both Frameworks and PrivateFrameworks directories. Using his expertise in Apple Development, Xcode, and Python, Mani aligned UITest-Runner tests with the new framework discovery logic, ensuring consistent UI test execution. His work improved CI stability by reducing environment-specific failures and flakiness, demonstrating a deep understanding of build systems and cross-project collaboration to support evolving Apple toolchains.