The Apollo Federation subgraph compatibility tools are designed to simplify the process of verifying compatibility between subgraphs and the Apollo Federation specification. The tools, which include an executable NPM script and a Github Action, allow developers to run compatibility tests on their local machine or within their CI/CD pipelines. This reduces the need for manual implementation and testing, streamlining the development process for subgraph authors. The tools are designed to be easy to use, with options for running tests locally or integrating them into existing workflows. Compatibility test results are displayed on a dedicated documentation page, making it easier for developers to verify their subgraphs' compatibility with the Apollo Federation specification.