Twilio’s Paste Design System has implemented custom rules using Danger JS to enforce versioning and changelog generation for their public packages, pin external dependencies, and ensure consistency in their design system. The team created rules that automate important tasks, such as checking for missing Changeset files, identifying unpinned external dependencies, and highlighting interesting build artifacts. These rules have improved efficiency, reduced errors, and allowed the team to focus on solving design system problems instead of manual checks, resulting in a more human-centered workflow.