This guide provides a detailed implementation of Agora's Cloud Recording feature for building a backend using Astro, a framework that allows developers to create web applications quickly and efficiently. The guide covers the setup of environment variables, API endpoints, and helper functions for making requests to the Agora API. It also explains how to generate a resource for recording, start a cloud recording session, query the status of the recording, and stop the recording. The code examples provided demonstrate how to implement these steps using Astro's framework. Overall, this guide provides a comprehensive overview of building a Cloud Recording backend with Astro and Agora, allowing developers to create secure video calls that can be recorded remotely.