diff --git a/js/plugins/dotprompt/src/prompt.ts b/js/plugins/dotprompt/src/prompt.ts
index b0fc9c4a0..43ffc4664 100644
--- a/js/plugins/dotprompt/src/prompt.ts
+++ b/js/plugins/dotprompt/src/prompt.ts
@@ -142,10 +142,10 @@ export class Dotprompt<Variables = unknown> implements PromptMetadata {
     return { ...toFrontmatter(this), template: this.template };
   }
 
-  define(): void {
+  define(options?: { ns: string }): void {
     definePrompt(
       {
-        name: registryDefinitionKey(this.name, this.variant),
+        name: registryDefinitionKey(this.name, this.variant, options?.ns),
         description: 'Defined by Dotprompt',
         inputSchema: this.input?.schema,
         inputJsonSchema: this.input?.jsonSchema,
diff --git a/js/plugins/dotprompt/src/registry.ts b/js/plugins/dotprompt/src/registry.ts
index 7a574a69d..9ccba374c 100644
--- a/js/plugins/dotprompt/src/registry.ts
+++ b/js/plugins/dotprompt/src/registry.ts
@@ -21,12 +21,17 @@ import { existsSync, readdir, readFileSync } from 'fs';
 import { basename, join, resolve } from 'path';
 import { Dotprompt } from './prompt.js';
 
-export function registryDefinitionKey(name: string, variant?: string) {
-  return `dotprompt/${name}${variant ? `.${variant}` : ''}`;
+export function registryDefinitionKey(
+  name: string,
+  variant?: string,
+  ns?: string
+) {
+  // "ns/prompt.variant" where ns and variant are optional
+  return `${ns ? `${ns}/` : ''}${name}${variant ? `.${variant}` : ''}`;
 }
 
-export function registryLookupKey(name: string, variant?: string) {
-  return `/prompt/${registryDefinitionKey(name, variant)}`;
+export function registryLookupKey(name: string, variant?: string, ns?: string) {
+  return `/prompt/${registryDefinitionKey(name, variant, ns)}`;
 }
 
 export async function lookupPrompt(
@@ -34,12 +39,11 @@ export async function lookupPrompt(
   variant?: string,
   dir: string = './prompts'
 ): Promise<Dotprompt> {
-  // Expect to find the prompt in the registry
-  const registryPrompt = (await lookupAction(
-    registryLookupKey(name, variant)
-  )) as PromptAction;
+  let registryPrompt =
+    (await lookupAction(registryLookupKey(name, variant))) ||
+    (await lookupAction(registryLookupKey(name, variant, 'dotprompt')));
   if (registryPrompt) {
-    return Dotprompt.fromAction(registryPrompt);
+    return Dotprompt.fromAction(registryPrompt as PromptAction);
   } else {
     // Handle the case where initialization isn't complete
     // or a file was added after the prompt folder was loaded.
@@ -110,6 +114,6 @@ export function loadPrompt(path: string, filename: string): Dotprompt {
   if (variant) {
     prompt.variant = variant;
   }
-  prompt.define();
+  prompt.define({ ns: 'dotprompt' });
   return prompt;
 }
diff --git a/js/plugins/dotprompt/tests/prompt_test.ts b/js/plugins/dotprompt/tests/prompt_test.ts
index f9a93cc23..ab5534ac7 100644
--- a/js/plugins/dotprompt/tests/prompt_test.ts
+++ b/js/plugins/dotprompt/tests/prompt_test.ts
@@ -185,7 +185,7 @@ output:
     });
   });
 
-  describe('definePrompt', () => {
+  describe('defineDotprompt', () => {
     it('registers a prompt and its variant', async () => {
       registerDotprompt();
       defineDotprompt(
diff --git a/js/testapps/menu/package.json b/js/testapps/menu/package.json
index 288fa68f2..9a4f3c258 100644
--- a/js/testapps/menu/package.json
+++ b/js/testapps/menu/package.json
@@ -2,7 +2,7 @@
   "name": "menu",
   "version": "1.0.0",
   "description": "A Genkit test app for understanding a restaurant menu",
-  "main": "lib/index.js",
+  "main": "./lib/src/index.js",
   "scripts": {
     "start": "node lib/index.js",
     "compile": "tsc",
@@ -27,5 +27,6 @@
   },
   "devDependencies": {
     "typescript": "^5.3.3"
-  }
+  },
+  "type": "module"
 }
diff --git a/js/testapps/menu/src/01/prompts.ts b/js/testapps/menu/src/01/prompts.ts
index f632dc7c1..5de13bb71 100644
--- a/js/testapps/menu/src/01/prompts.ts
+++ b/js/testapps/menu/src/01/prompts.ts
@@ -18,7 +18,7 @@ import { definePrompt } from '@genkit-ai/ai';
 import { GenerateRequest } from '@genkit-ai/ai/model';
 import { defineDotprompt } from '@genkit-ai/dotprompt';
 import { geminiPro } from '@genkit-ai/vertexai';
-import { MenuQuestionInput, MenuQuestionInputSchema } from '../types';
+import { MenuQuestionInput, MenuQuestionInputSchema } from '../types.js';
 
 // Define a prompt to handle a customer question about the menu.
 // This prompt uses definePrompt directly.
diff --git a/js/testapps/menu/src/02/flows.ts b/js/testapps/menu/src/02/flows.ts
index ef2bc5761..7821de63f 100644
--- a/js/testapps/menu/src/02/flows.ts
+++ b/js/testapps/menu/src/02/flows.ts
@@ -15,8 +15,8 @@
  */
 
 import { defineFlow } from '@genkit-ai/flow';
-import { AnswerOutputSchema, MenuQuestionInputSchema } from '../types';
-import { s02_dataMenuPrompt } from './prompts';
+import { AnswerOutputSchema, MenuQuestionInputSchema } from '../types.js';
+import { s02_dataMenuPrompt } from './prompts.js';
 
 // Define a flow which generates a response from the prompt.
 
diff --git a/js/testapps/menu/src/02/prompts.ts b/js/testapps/menu/src/02/prompts.ts
index c9350bd90..23fcdc969 100644
--- a/js/testapps/menu/src/02/prompts.ts
+++ b/js/testapps/menu/src/02/prompts.ts
@@ -16,8 +16,8 @@
 
 import { defineDotprompt } from '@genkit-ai/dotprompt';
 import { geminiPro } from '@genkit-ai/vertexai';
-import { MenuQuestionInputSchema } from '../types';
-import { menuTool } from './tools';
+import { MenuQuestionInputSchema } from '../types.js';
+import { menuTool } from './tools.js';
 
 // The prompt uses a tool which will load the menu data,
 // if the user asks a reasonable question about the menu.
diff --git a/js/testapps/menu/src/02/tools.ts b/js/testapps/menu/src/02/tools.ts
index d9a60290d..4c47b2614 100644
--- a/js/testapps/menu/src/02/tools.ts
+++ b/js/testapps/menu/src/02/tools.ts
@@ -16,9 +16,9 @@
 
 import { defineTool } from '@genkit-ai/ai';
 import * as z from 'zod';
-import { MenuItem, MenuItemSchema } from '../types';
+import { MenuItemSchema } from '../types.js';
 
-const menuData: Array<MenuItem> = require('../../data/menu.json');
+import menuData from '../../data/menu.json' assert { type: 'json' };
 
 export const menuTool = defineTool(
   {
diff --git a/js/testapps/menu/src/03/flows.ts b/js/testapps/menu/src/03/flows.ts
index c9addc77d..4dd925ab7 100644
--- a/js/testapps/menu/src/03/flows.ts
+++ b/js/testapps/menu/src/03/flows.ts
@@ -19,16 +19,15 @@ import { MessageData } from '@genkit-ai/ai/model';
 import { defineFlow, run } from '@genkit-ai/flow';
 import { geminiPro } from '@genkit-ai/vertexai';
 
-import { MenuItem } from '../types';
 import {
   ChatHistoryStore,
   ChatSessionInputSchema,
   ChatSessionOutputSchema,
-} from './chats';
-import { s03_chatPreamblePrompt } from './prompts';
+} from './chats.js';
+import { s03_chatPreamblePrompt } from './prompts.js';
 
 // Load the menu data from a JSON file.
-const menuData = require('../../data/menu.json') as Array<MenuItem>;
+import menuData from '../../data/menu.json' assert { type: 'json' };
 
 // Render the preamble prompt that seeds our chat history.
 const preamble: Array<MessageData> = s03_chatPreamblePrompt.renderMessages({
diff --git a/js/testapps/menu/src/03/prompts.ts b/js/testapps/menu/src/03/prompts.ts
index 18abc13bb..1d80258dc 100644
--- a/js/testapps/menu/src/03/prompts.ts
+++ b/js/testapps/menu/src/03/prompts.ts
@@ -16,7 +16,7 @@
 
 import { defineDotprompt } from '@genkit-ai/dotprompt';
 import { geminiPro } from '@genkit-ai/vertexai';
-import { DataMenuQuestionInputSchema } from '../types';
+import { DataMenuQuestionInputSchema } from '../types.js';
 
 // This prompt will generate two messages when rendered.
 // These two messages will be used to seed the exchange with the model.
diff --git a/js/testapps/menu/src/04/flows.ts b/js/testapps/menu/src/04/flows.ts
index fbef53a0c..b372840f2 100644
--- a/js/testapps/menu/src/04/flows.ts
+++ b/js/testapps/menu/src/04/flows.ts
@@ -27,8 +27,8 @@ import {
   MenuItem,
   MenuItemSchema,
   MenuQuestionInputSchema,
-} from '../types';
-import { s04_ragDataMenuPrompt } from './prompts';
+} from '../types.js';
+import { s04_ragDataMenuPrompt } from './prompts.js';
 
 // Define a flow which indexes items on the menu.
 
diff --git a/js/testapps/menu/src/04/prompts.ts b/js/testapps/menu/src/04/prompts.ts
index ddb5dc28a..bd54054b9 100644
--- a/js/testapps/menu/src/04/prompts.ts
+++ b/js/testapps/menu/src/04/prompts.ts
@@ -16,7 +16,7 @@
 
 import { defineDotprompt } from '@genkit-ai/dotprompt';
 import { geminiPro } from '@genkit-ai/vertexai';
-import { DataMenuQuestionInputSchema } from '../types';
+import { DataMenuQuestionInputSchema } from '../types.js';
 
 export const s04_ragDataMenuPrompt = defineDotprompt(
   {
diff --git a/js/testapps/menu/src/05/flows.ts b/js/testapps/menu/src/05/flows.ts
index 4caddfa6f..644e2e9ae 100644
--- a/js/testapps/menu/src/05/flows.ts
+++ b/js/testapps/menu/src/05/flows.ts
@@ -23,8 +23,8 @@ import {
   AnswerOutputSchema,
   MenuQuestionInputSchema,
   TextMenuQuestionInputSchema,
-} from '../types';
-import { s05_readMenuPrompt, s05_textMenuPrompt } from './prompts';
+} from '../types.js';
+import { s05_readMenuPrompt, s05_textMenuPrompt } from './prompts.js';
 
 // Define a flow that takes an image, passes it to Gemini Vision Pro,
 // and extracts all of the text from the photo of the menu.
diff --git a/js/testapps/menu/src/05/prompts.ts b/js/testapps/menu/src/05/prompts.ts
index cfcf10669..7154cf77d 100644
--- a/js/testapps/menu/src/05/prompts.ts
+++ b/js/testapps/menu/src/05/prompts.ts
@@ -17,7 +17,7 @@
 import { defineDotprompt } from '@genkit-ai/dotprompt';
 import { geminiPro, geminiProVision } from '@genkit-ai/vertexai';
 import * as z from 'zod';
-import { TextMenuQuestionInputSchema } from '../types';
+import { TextMenuQuestionInputSchema } from '../types.js';
 
 export const s05_readMenuPrompt = defineDotprompt(
   {
diff --git a/js/testapps/menu/src/index.ts b/js/testapps/menu/src/index.ts
index 364737e2e..3becbee32 100644
--- a/js/testapps/menu/src/index.ts
+++ b/js/testapps/menu/src/index.ts
@@ -15,14 +15,13 @@
  */
 import { configureGenkit } from '@genkit-ai/core';
 import { devLocalVectorstore } from '@genkit-ai/dev-local-vectorstore';
-import { dotprompt } from '@genkit-ai/dotprompt';
 import { textEmbeddingGecko, vertexAI } from '@genkit-ai/vertexai';
 
 // Initialize Genkit
 
 configureGenkit({
   plugins: [
-    dotprompt(),
+    // dotprompt(),
     vertexAI({ location: 'us-central1' }),
     devLocalVectorstore([
       {
@@ -41,20 +40,20 @@ configureGenkit({
 // Export all of the example prompts and flows
 
 // 01
-export { s01_staticMenuDotPrompt, s01_vanillaPrompt } from './01/prompts';
+export { s01_staticMenuDotPrompt, s01_vanillaPrompt } from './01/prompts.js';
 // 02
-export { s02_menuQuestionFlow } from './02/flows';
-export { s02_dataMenuPrompt } from './02/prompts';
+export { s02_menuQuestionFlow } from './02/flows.js';
+export { s02_dataMenuPrompt } from './02/prompts.js';
 // 03
-export { s03_multiTurnChatFlow } from './03/flows';
-export { s03_chatPreamblePrompt } from './03/prompts';
+export { s03_multiTurnChatFlow } from './03/flows.js';
+export { s03_chatPreamblePrompt } from './03/prompts.js';
 // 04
-export { s04_indexMenuItemsFlow, s04_ragMenuQuestionFlow } from './04/flows';
-export { s04_ragDataMenuPrompt } from './04/prompts';
+export { s04_indexMenuItemsFlow, s04_ragMenuQuestionFlow } from './04/flows.js';
+export { s04_ragDataMenuPrompt } from './04/prompts.js';
 // 05
 export {
   s05_readMenuFlow,
   s05_textMenuQuestionFlow,
   s05_visionMenuQuestionFlow,
-} from './05/flows';
-export { s05_readMenuPrompt, s05_textMenuPrompt } from './05/prompts';
+} from './05/flows.js';
+export { s05_readMenuPrompt, s05_textMenuPrompt } from './05/prompts.js';
diff --git a/js/testapps/menu/tsconfig.json b/js/testapps/menu/tsconfig.json
index e51f33ae3..0ae845740 100644
--- a/js/testapps/menu/tsconfig.json
+++ b/js/testapps/menu/tsconfig.json
@@ -1,6 +1,7 @@
 {
   "compilerOptions": {
     "module": "NodeNext",
+    "moduleResolution": "NodeNext",
     "noImplicitReturns": true,
     "noUnusedLocals": false,
     "outDir": "lib",
@@ -8,7 +9,8 @@
     "strict": true,
     "target": "es2017",
     "skipLibCheck": true,
-    "esModuleInterop": true
+    "esModuleInterop": true,
+    "resolveJsonModule": true
   },
   "compileOnSave": true,
   "include": ["src"]