Geoffrey Casaubon developed two expert agents for the Vue.js ecosystem within the github/awesome-copilot repository, focusing on enhancing frontend development workflows. He implemented the nuxt-expert and vuejs-expert agents using Nuxt.js, Vue.js, and TypeScript, targeting both modern and legacy codebases by supporting Nuxt 3, Vue 3 Composition API, Pinia, and Vue Router, while maintaining compatibility with Vue 2. The agents were built on Claude Sonnet 4.5 and adhered to established conventions for reliability. Geoffrey also updated documentation by regenerating README.agents.md as part of the build process, ensuring that cross-version support and scalable development practices were well documented.