GraphQL Schema Class Specification

Class: graphql-schema Version: 1.0.0-draft Conforms to: schema-atoms/design-spec/atom-spec@1.1.0

What This Class Covers

The graphql-schema class represents GraphQL API type systems expressed in GraphQL Schema Definition Language (SDL). It captures types, queries, mutations, subscriptions, directives, and scalar definitions that together define the shape and capabilities of a GraphQL API.

Accepted Asset Formats

• .graphql — GraphQL Schema Definition Language document (preferred)
• .sdl — Schema Definition Language document (alternate extension)

Normative Requirements

• A graphql-schema atom MUST contain a single asset file that is a valid GraphQL SDL document parseable by a spec-compliant GraphQL parser (as defined by the June 2018 or later GraphQL specification).
• The schema MUST define at least one root operation type (Query, Mutation, or Subscription).
• The atom MUST NOT include resolver implementations or runtime configuration; it describes the type contract only.

Example Atom Reference

schema-atoms/api-spec/catalog-graphql@1.0.0
├── atom.toml   (class = "graphql-schema")
└── schema.graphql

This atom would declare the type system for a product catalog GraphQL API, including Query.products, Product type, and associated input/enum types.

# atom.toml — class specification atom for graphql-schema
id          = "schema-atoms/design-spec/graphql-schema-class-spec"
version     = "1.0.0-draft"
content_hash = ""
lifecycle   = "draft"
created_at  = "2026-05-23T00:00:00Z"

[spec]
class       = "design-spec"
title       = "GraphQL Schema Class Specification"
summary     = "Normative definition of the graphql-schema atom class in schema-atoms."
authors     = ["convergent-systems-co"]
conforms_to = "schema-atoms/design-spec/atom-spec@1.1.0"
asset       = "spec.md"