With Ocuroot, you can configure builds and deployments right in your source repo with config files written in Starlark. These config files all have the extension .ocu.star. The Ocuroot SDK is a collection of Starlark modules that power your configuration files. Functions and structs provided by the SDK are imported using the load function. For example, to import json and yaml functions from the encoding module: 
load("github.com/ocuroot/sdk/v0/encoding.star", "json", "yaml")
You can find a set of stubs for each module in the GitHub repo ocuroot/sdk. There are two key kinds of config file.