During May 2025, Derlopes focused on backend development for the cline/cline repository, addressing a critical issue in AWS credential management. He implemented a targeted bug fix in TypeScript that ensures explicit AWS credentials are preserved during client initialization, even when the AWS_PROFILE environment variable is set. By temporarily unsetting AWS_PROFILE when explicit credentials are provided, Derlopes prevented credential conflicts that could disrupt deployment stability and security. This solution improved the reliability of AWS-based workflows, particularly in CI/CD pipelines. His work demonstrated a strong understanding of environment variable handling and AWS integration, though the scope was limited to a single bug fix.