Graphql Operation Validation Against Schema

✏️ Apollo CLI for client tooling (Mostly replaced by Rover)

Unique: Uses a multi-pass compiler architecture (apollo-codegen-core) that normalizes operations into an intermediate representation before validation, enabling language-agnostic validation that feeds into language-specific code generators. Integrates directly with Apollo Studio for schema versioning and operation registry tracking.

vs others: Tighter integration with Apollo Studio than standalone tools like graphql-cli, enabling schema versioning and operation registry features beyond basic validation