GraphQL Schema Diff

GraphQL Schema Diff is a CLI and library for comparing two GraphQL schemas and detecting dangerous and breaking changes. v3.0.0 (current stable) requires Node 20+, ships TypeScript types, and offers both CLI and JavaScript/TypeScript API. Key differentiators: focused solely on diffing with clear human-readable output, support for remote schema URLs, glob patterns, and HTML output. Unlike GraphQL Inspector which lists all changes, it prioritizes breaking and dangerous detection with exit code configuration.