feat(web): continue source-backed implementation waves

web/protocol/resource-commands.ts

@@ -0,0 +1,8 @@
+import type { WebEngineRequest } from "./web-engine";
+
+/** Resource-facing command constructors; asset bytes remain owned by the worker/storage path. */
+export const resourceCommands = Object.freeze({
+  requestAsset(assetId: string): Extract<WebEngineRequest["command"], { type: "requestAsset" }> {
+    return { type: "requestAsset", assetId };
+  },
+} as const);