Policy as Code
Writing authorization rules in a dedicated, testable language instead of scattering `if` statements through application code — the engineering practice that makes PBAC real.
Policy as code treats authorization rules the way software already treats everything else that matters: version-controlled, peer-reviewed, unit-tested, and deployed through a pipeline — not hand-edited in production or duplicated across services. OPA/Rego, AWS Cedar, and Casbin are the three engines that show up most often, each trading off differently between expressiveness, formal verification, and embedding simplicity.