diff --git a/examples/plugins/example/main.go b/examples/plugins/example/main.go
index f791f0b02..afb358b2f 100644
--- a/examples/plugins/example/main.go
+++ b/examples/plugins/example/main.go
@@ -92,7 +92,19 @@ func handleStatus(c *echo.Context) error {
 	})
 }
 
-func NewPlugin() plugins.Plugin { return &ExamplePlugin{} }
+// singleton ensures all factory functions return the same instance so that state
+// initialized in Init() (e.g. event listeners, DB connections) is available to
+// route handlers and other capabilities.
+var singleton = &ExamplePlugin{}
+
+func NewPlugin() plugins.Plugin { return singleton }
+
+// Typed factory functions for Yaegi compatibility.
+// Yaegi wraps return values per the declared return type, so sub-interface type
+// assertions (Plugin -> AuthenticatedRouterPlugin) don't work. These typed
+// factories ensure Yaegi wraps the value with the correct interface wrapper.
+func NewAuthenticatedRouterPlugin() plugins.AuthenticatedRouterPlugin     { return singleton }
+func NewUnauthenticatedRouterPlugin() plugins.UnauthenticatedRouterPlugin { return singleton }
 
 type TestListener struct{}