First concept

node_modules/next/dist/server/future/route-matches/route-match.d.ts

@@ -0,0 +1,14 @@
+import type { RouteDefinition } from '../route-definitions/route-definition';
+/**
+ * RouteMatch is the resolved match for a given request. This will contain all
+ * the dynamic parameters used for this route.
+ */
+export interface RouteMatch<D extends RouteDefinition = RouteDefinition> {
+    readonly definition: D;
+    /**
+     * params when provided are the dynamic route parameters that were parsed from
+     * the incoming request pathname. If a route match is returned without any
+     * params, it should be considered a static route.
+     */
+    readonly params: Record<string, string | string[]> | undefined;
+}