Cops-hq offers many features, and most can be used in isolation. For example, if you only wanted to write pure IaC scripts in Go, you can simply use the Command Executor library. If you want a higher-level support with common tasks already solved out of the box, you can use one of the recipes like Terraform Recipe.
Note: all public exposed members are documented via GoDoc, so make sure you check the source code as well! Tests are also a nice way to understand the features.