Introduction to Open Policy Agent (OPA) Rego Language

The article discusses the use of Policy as Code and its implementation using Open Policy Agent (OPA) and Rego language. It explains how decisions in Rego are used as outputs of policies and can be strings, arrays, objects, sets, etc. Additionally, it covers the use of block notation for assignments, OR conditions, set-based decisions, and custom functions. The author emphasizes that Policies can have arbitrary sets of decisions with those decision being of arbitrary types. Finally, the article encourages readers to explore more about Rego policy language through the official documentation and consider using Spacelift for IaC development.