During June 2025, Dmitrii Shishliannikov developed Helm OCI registry self-signed CA support for the k0sproject/k0s repository. He enabled secure installation of Helm extensions from OCI registries using self-signed certificates by allowing users to specify a CA certificate file, addressing a common interoperability challenge. His work involved enhancing TLS handling for OCI transport, ensuring that Helm extension deployments could trust custom certificate authorities. Dmitrii utilized Go, Helm, and Kubernetes, demonstrating expertise in TLS and OCI registry integration. This feature reduced setup friction and expanded registry compatibility, reflecting a focused engineering effort that addressed a nuanced security and deployment requirement.