Worked on the boldsoftware/sketch repository to deliver a feature that prioritizes Dockerfile.sketch over the standard Dockerfile for sketch-specific environments, allowing for more tailored and reliable environment setups. The implementation leveraged Go for both the core logic and a comprehensive test suite, ensuring that the new prioritization mechanism maintained backward compatibility and did not require changes to user configurations. By focusing on command-line interface design, Docker integration, and file system operations, the work reduced ambiguity in environment provisioning and improved reliability for users working with sketches, while thorough testing validated the prioritization logic across a range of environment configurations.