Worked on stabilizing the development environment and continuous integration for the square/workflow-swift repository, focusing on accelerating delivery and reducing friction in daily development. Upgraded the CI pipeline to use macOS 26 and Xcode 26.3, improving compatibility with upcoming toolchains and minimizing build instability. Addressed compiler crashes by updating dependencies such as SwiftSyntax and swift-case-paths, directly targeting the root causes of build failures. Enhanced the developer experience by refining configuration files and updating documentation, which streamlined onboarding and pull request reviews. The work leveraged skills in CI/CD, Swift, and Xcode, resulting in a more reliable and efficient development workflow.