cue-lang/cue

Health v2 · maintenance only

Adoption not part of the score

6241 stars · 366 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

CUE is an open-source data validation language and inference engine for defining, generating, and validating text-based and dynamic configuration and data. It ships as the `cue` CLI plus Go APIs, integrating with JSON, YAML, TOML, XML, OpenAPI, Protobuf, JSON Schema, and Go.

Use cases

• validate json and yaml files against a schema
• define and unify large-scale kubernetes configuration
• remove boilerplate from repetitive config files
• generate openapi or protobuf definitions from schemas
• enforce policy constraints on configuration data
• convert between json yaml and cue formats
• write schemas that merge types and values

When to choose

• you need powerful, composable validation of JSON/YAML/TOML data
• you manage large or multi-source configuration that must stay consistent
• you want to unify schemas, data, and policies in one language
• you need code or schema generation across Go, Protobuf, and OpenAPI

When to avoid

• you only need simple one-off JSON schema validation
• your team cannot adopt a new configuration language
• you need a general-purpose programming language for application logic
• your toolchain has no CUE integration and you cannot add a CLI step

Facets

cli-tool · maturity active

configuration-management form-handling templating cli json yaml parser developer-tools programming-languages apis windows go cli cross-platform cue-language data-validation schema policy-enforcement kubernetes-config openapi protobuf json-schema boilerplate-removal inference-engine code-generation configuration data-engineering devops linux macos docker

Member repositories

For agents

markdown · JSON · MCP: product_card(name="cue-lang/cue")