Worked on the input-output-hk/mastering-cardano repository to deliver an Enhanced Development Environment Setup Guide aimed at streamlining contributor onboarding and improving reproducibility. Focused on documentation using Markdown, the work detailed explicit steps for installing Ruby, configuring build tools, setting up Bundler, and managing environment variables. The approach included updating setup instructions to clarify the sequence of prerequisite installations and adding guidance for running bundle install, reducing common setup errors. By emphasizing environment configuration and automation best practices, the contribution reduced onboarding time and enabled faster iteration for new developers, strengthening overall development hygiene within the project’s collaborative workflow.