Takumi Hiraoka developed reliability and resource management features for the confidential-containers/cloud-api-adaptor and kata-containers/kata-containers repositories. He implemented a unified cleanup mechanism for orphaned virtual machines across multiple cloud providers, using Go and resource cleanup strategies to reduce costs and improve deployment hygiene. Takumi also enhanced Azure end-to-end test debugging by integrating shared diagnostic tooling, and addressed concurrency issues in instance deletion with mutex protection. Additionally, he expanded runtime visibility by adding -info flag support to containerd shims in both Go and Rust, exposing runtime information for improved compatibility. His work demonstrated depth in backend development and cloud infrastructure management.