Module development

• Your first module
• Module skeletonFolder layout, all fields of module.json, the bundle and installer class, contributing to the core with contributions.yaml, route and service configuration, versioning and upgrade.
• Database and migrationsModule tables, Doctrine entities, numbered and idempotent SQL migration files, schema change patterns, initial data, uninstall and safe upgrade.
• Menu and permissions#[CpAdminMenu], the Tools rule in AACP and capability definitions.
• Forms and the Field APIField widgets, the image/file field, multi-value fields and the media picker.
• CSS and assetsThe module's JS/CSS files, importmap, local libraries and the classes that go into the core stylesheet.
• Search, settings and SEOSearchProvider, CpSetting settings, translations and cache clearing.
• Extension points
• Writing testsUnit and integration tests for your module; IntegrationTestCase, the test environment and what should be tested.
• Publishing to the storeThe module package, the signed catalogue, the release flow, the compatibility check and how installation works step by step on the user's side.
• Module checklistThe checks every module must pass before release (lessons from Portal).