Extension points

Modules never import each other. To collaborate, they go through the core registries.

Why #

Hard-coding a reference from one module to another (e.g. office → code) would break independence: you cannot assume a module is installed.

The two options #

• Vendor the needed file into your module.
• Go through an extension point: ExtensionRegistry / ModuleServiceRegistry on the frontend.

Example: a cross-module contract #

// Le module calendar publie un service…
ModuleServiceRegistry.publish('calendar', {
  openDate: (arg) => { /* ouvre l'agenda sur une date */ }
})

// …qu'un autre module (ex. assistant) consomme s'il est présent
ModuleServiceRegistry.get('calendar')?.openDate('2026-06-25')

Shared singletons #

React, Radix DropdownMenu, the stores… must stay external and never be re-bundled, or duplicates will break the UI.