What problem does it solve? Newly created Wix CLI extensions do not appear in the dashboard, editor, or checkout flows until they are registered in src/extensions.ts, and a missing .use() call is the most common cause of extensions silently failing. ## Core Features & Use Cases - Extension Registration: Import extension builders and chain them with .use() calls in src/extensions.ts so the Wix CLI build system discovers them. - Simple and Advanced Patterns: Register extensions directly for small apps, or re-export all extensions from src/index.ts and register them programmatically for large apps. - Naming and Troubleshooting Guidance: Apply the {extensiontype}{CamelCaseName} export naming convention and diagnose issues like missing imports, wrong paths, and export name mismatches. - Use Case: After generating a new dashboard page extension, add its import and .use(dashboardpageMyPage) call to src/extensions.ts so the page appears in the Wix dashboard sidebar. ## Quick Start Register my new dashboard page extension by adding its import and .use() call to src/extensions.ts.