AWS Amplify GraphQL Transformer Core

This package, `@aws-amplify/graphql-transformer-core`, serves as the foundational framework within AWS Amplify for converting GraphQL Schema Definition Language (SDL) into AWS CloudFormation templates. It is integral to how Amplify provisions serverless GraphQL APIs on AWS AppSync, DynamoDB, Lambda, and OpenSearch. Currently at version 9.0.7, it is actively maintained as part of the broader AWS Amplify monorepo, with releases tied to the Amplify CLI and API category updates. Its key differentiators include simplifying complex cloud infrastructure setup through GraphQL directives like `@model`, `@auth`, `@connection`, and `@searchable`, abstracting away much of the underlying AWS service configuration. A significant architectural shift from Transformer V1 to V2 introduced deny-by-default authorization, explicit data modeling directives (`@primaryKey`, `@index`, `@hasOne`, `@hasMany`), and a new AppSync Pipeline Resolver architecture.