CUE Has a Free API: The Configuration Language That Validates, Generates, and Queries Your Data Like a Type System for JSON

Your Kubernetes YAML has 500 lines and a typo in a resource limit crashes production. CUE adds types, constraints, and validation to configuration — catch errors before they deploy. What Is CUE? CUE is a data validation language that makes JSON and YAML safe. It combines data definition, validation, code generation, and querying in one tool. Originally designed by a Go team member, it brings the rigor of a type system to configuration files. Why CUE Is Different Types as values : Define schemas and data in the same language Validation : Constraint-based validation with clear error messages Code generation : Generate Go, JSON Schema, OpenAPI from CUE Querying : Query and transform data Kubernetes : First-class support for K8s manifests Hermetic : Deterministic evaluation, no side effects Completely free and open source Quick Start Install CUE: brew install cue-lang/tap/cue Define a schema with constraints: // schema.cue package config #Service: { name: string & =~"^[a-z][a-z0-9-]*$" por