Worked on improving contributor onboarding for the plotly/dash repository by standardizing virtual environment setup instructions in the CONTRIBUTING.md documentation. Focused on reducing ambiguity for new contributors by updating and clarifying the venv command usage across Linux, macOS, and Windows platforms. Utilized Markdown to ensure documentation consistency and applied best practices in contribution guidelines to streamline the setup process. The changes enhanced cross-platform compatibility and made the onboarding flow more accessible, resulting in a smoother experience for future contributors. Emphasized version-control hygiene throughout the process, demonstrating attention to detail in documentation and collaborative development workflows.