Worked on enhancing the Development Environment Setup Documentation for the elixir-lang/expert repository, focusing on improving the onboarding process for new contributors. The update clarified prerequisites for installing the 'just' command-line tool and provided direct links to installation instructions, ensuring that users could reliably set up their local development environments. Using Markdown for documentation and leveraging skills in technical writing, the work aimed to reduce setup friction and promote consistency across different machines. By aligning the documentation with current tooling, the changes supported faster ramp-up for contributors and helped lower support overhead, contributing to a smoother and more efficient development workflow.