This repository defines a schema for describing custom elements manifest files. It provides a TypeScript definition file (schema.d.ts) that serves as the single source of truth for the schema, and a generated JSON Schema file (schema.json) for validation. The schema captures metadata about custom elements including their attributes, events, methods, and CSS properties. The repository includes build scripts to generate the JSON Schema from TypeScript definitions, tests to validate the schema against an example manifest, and CI/CD workflows. While the schema itself is well-designed and reusable, the project shows signs of technical drift due to outdated dependencies.