Agent Skills: GoRouter Navigation

GoRouter Navigation

Priority: P0 (CRITICAL)

Type-safe deep linking and routing system using go_router and go_router_builder.

Structure

core/router/
├── app_router.dart # Router configuration
└── routes.dart # Typed route definitions (GoRouteData)

Implementation Guidelines

• Typed Routes: Always use GoRouteData and @TypedGoRoute from go_router_builder. Never use raw path strings.
• Parameters: Define strongly-typed parameters in the route class (e.g., class OrderDetailRoute extends GoRouteData { final String id; }) with paths like '/orders/:id'.
• Root Router: One global GoRouter instance registered in DI.
• Sub-Routes: Nest related routes using TypedGoRoute and children lists.
• Redirection: Handle Auth (Login check) in the redirect callback of the GoRouter config: redirect: (context, state) => isLoggedIn ? null : '/login'. Do NOT check auth inside the page widget.
• Tabs: Use StatefulShellRoute with branches for a bottom tab bar (Home, Orders, Profile) so each tab maintains its own navigation stack.
• Transitions: Define standard transitions (Fade, Slide) in buildPage.
• Navigation: Use MyRoute().go(context) or MyRoute().push(context). Using OrderDetailRoute(id: id).go(context) is the only allowed way to navigate.

Code

// Route Definition
@TypedGoRoute<HomeRoute>(path: '/')
class HomeRoute extends GoRouteData {
  @override
  Widget build(context, state) => const HomePage();
}

// Router Config
final router = GoRouter(
  routes: $appRoutes,
  redirect: (context, state) {
    if (notAuthenticated) return '/login';
    return null;
  },
);

Anti-Patterns

• ❌ context.go('/orders/123') with a raw string path — always use typed GoRouteData classes (e.g., OrderDetailRoute(id: 123).go(context))
• ❌ Auth check inside the page widget's build() — redirect logic belongs in the GoRouter.redirect callback, not the UI
• ❌ Multiple GoRouter instances — register one global instance in DI and share it throughout the app
• ❌ Navigating to a deep link without validating the ID in redirect — always verify IDs/parameters exist before building the route

Related Topics

layer-based-clean-architecture | auto-route-navigation | security