Which language is specifically related to creating custom queries within KICS?

The language specifically related to creating custom queries within KICS (Keeping Infrastructure as Code Secure) is OPA Rego. Rego is a purpose-built policy language that enables users to define criteria and rules for policy enforcement and assessments in an infrastructure-as-code context. It integrates seamlessly with OPA (Open Policy Agent), allowing KICS to leverage its powerful querying capabilities for content validation and security checks.

Using OPA Rego, users can write intricate queries that evaluate configurations against defined policies to ensure security best practices are followed. The flexibility and expressiveness of Rego allow developers to implement custom queries tailored to their specific security requirements, making it the optimal choice in this context.