Kilian contributed to the boldsoftware/sketch repository by enhancing Docker image building workflows with a focus on reliability and extensibility. He implemented a robust error detection mechanism for docker inspect when using Podman as a Docker alias, improving build consistency across environments by normalizing output before error checks. Kilian also refactored the image building logic to support multiple large language model services, integrating Gemini and enabling dynamic LLM selection for Dockerfile generation. His work leveraged Go, Docker, and shell scripting, demonstrating depth in cross-environment compatibility and maintainable architecture. The changes addressed both immediate reliability issues and future extensibility needs.