The Ayehu Custom Activities Contribution Guide provides guidelines and instructions for developers who want to contribute custom activities to the Ayehu IT automation platform. The guide outlines the contribution process, which includes reading contribution guidelines, writing code for custom activities, exporting the activities, and creating pull requests on GitHub. Contributors can work toward becoming Ayehu Certified IT Automation Developers through their participation in the custom activities development process. The resource includes information about the review process that occurs after opening a pull request, helping contributors understand what to expect during the evaluation of their submissions. This guide serves as documentation for the open-source contribution workflow and community development practices around the Ayehu automation platform.