extract RESOURCE_URI_META_KEY constant

Author: ochafik

examples/simple-server/server.ts

@@ -14,6 +14,7 @@ import cors from "cors";
 import path from "node:path";
 import fs from "node:fs/promises";
 import { fileURLToPath } from "node:url";
+import { RESOURCE_URI_META_KEY } from "@modelcontextprotocol/ext-apps";
 
 const __filename = fileURLToPath(import.meta.url);
 const __dirname = path.dirname(__filename);
@@ -81,7 +82,7 @@ const getServer = async () => {
           message: z.string().describe("Message to display"),
         },
         _meta: {
-          "ui/resourceUri": rawResource.uri,
+          [RESOURCE_URI_META_KEY]: rawResource.uri,
         },
       },
       async ({ message }): Promise<CallToolResult> => ({
@@ -112,7 +113,7 @@ const getServer = async () => {
           message: z.string().describe("Message to display"),
         },
         _meta: {
-          "ui/resourceUri": vanillaResource.uri,
+          [RESOURCE_URI_META_KEY]: vanillaResource.uri,
         },
       },
       async ({ message }): Promise<CallToolResult> => ({
@@ -143,7 +144,7 @@ const getServer = async () => {
           message: z.string().describe("Message to display"),
         },
         _meta: {
-          "ui/resourceUri": reactResource.uri,
+          [RESOURCE_URI_META_KEY]: reactResource.uri,
         },
       },
       async ({ message }): Promise<CallToolResult> => ({

specification/draft/apps.mdx

@@ -256,7 +256,7 @@ function sendRequest(method: string, params: any) {
       if (event.data?.id === id) {
         window.removeEventListener('message', listener);
         if (event.data?.result) {
-          resolve(true);
+          resolve(event.data?.result);
         } else if (event.data?.error) {
           reject(new Error(event.data.error));
         }

src/app.ts

@@ -41,6 +41,8 @@ import { Transport } from "@modelcontextprotocol/sdk/shared/transport.js";
 export { PostMessageTransport } from "./message-transport.js";
 export * from "./types";
 
+export const RESOURCE_URI_META_KEY = "ui/resourceUri";
+
 type AppOptions = ProtocolOptions & {
   autoResize?: boolean;
 };