inline simple chat engine as a default

packages/create-llama/templates/index.ts

@@ -71,17 +71,6 @@ export const installTemplate = async ({
       parents: true,
       cwd: enginePath,
     });
-    const routeFile = path.join(
-      root,
-      relativeEngineDestPath,
-      framework === "nextjs" ? "route.ts" : "chat.controller.ts",
-    );
-    const routeFileContent = await fs.readFile(routeFile, "utf8");
-    const newContent = routeFileContent.replace(
-      /^import { createChatEngine }.*$/m,
-      'import { createChatEngine } from "./engine"\n',
-    );
-    await fs.writeFile(routeFile, newContent);
   }
 
   /**
@@ -125,8 +114,10 @@ export const installTemplate = async ({
       customApiPath,
       "\n",
     );
+    // remove the default api folder
     const apiPath = path.join(root, "app", "api");
     await fs.rmdir(apiPath, { recursive: true });
+    // modify the dev script to use the custom api path
     packageJson.scripts = {
       ...packageJson.scripts,
       dev: `NEXT_PUBLIC_CHAT_API=${customApiPath} next dev`,

packages/create-llama/templates/types/simple/express/src/controllers/chat.controller.ts

 import { NextFunction, Request, Response } from "express";
 import { ChatMessage, OpenAI } from "llamaindex";
-import { createChatEngine } from "../../../../engines/context";
+import { createChatEngine } from "./engine";
 
 export const chat = async (req: Request, res: Response, next: NextFunction) => {
   try {

packages/create-llama/templates/types/simple/express/tsconfig.json

@@ -4,6 +4,7 @@
     "esModuleInterop": true,
     "forceConsistentCasingInFileNames": true,
     "strict": true,
-    "skipLibCheck": true
+    "skipLibCheck": true,
+    "moduleResolution": "node"
   }
-}
+}
\ No newline at end of file

packages/create-llama/templates/types/simple/nextjs/app/api/chat/engine/index.ts

+import { LLM, SimpleChatEngine } from "llamaindex";
+
+export async function createChatEngine(llm: LLM) {
+  return new SimpleChatEngine({
+    llm,
+  });
+}

packages/create-llama/templates/types/simple/nextjs/app/api/chat/route.ts

 import { ChatMessage, OpenAI } from "llamaindex";
 import { NextRequest, NextResponse } from "next/server";
-import { createChatEngine } from "../../../../../../engines/context";
+import { createChatEngine } from "./engine";
 
 export const runtime = "nodejs";
 export const dynamic = "force-dynamic";

packages/create-llama/templates/types/streaming/express/src/controllers/chat.controller.ts

 import { streamToResponse } from "ai";
 import { NextFunction, Request, Response } from "express";
 import { ChatMessage, OpenAI } from "llamaindex";
-import { createChatEngine } from "../../../../engines/context";
+import { createChatEngine } from "./engine";
 import { LlamaIndexStream } from "./llamaindex-stream";
 
 export const chat = async (req: Request, res: Response, next: NextFunction) => {

packages/create-llama/templates/types/streaming/express/src/controllers/engine/index.ts

+import { LLM, SimpleChatEngine } from "llamaindex";
+
+export async function createChatEngine(llm: LLM) {
+  return new SimpleChatEngine({
+    llm,
+  });
+}

packages/create-llama/templates/types/streaming/express/tsconfig.json

@@ -4,6 +4,7 @@
     "esModuleInterop": true,
     "forceConsistentCasingInFileNames": true,
     "strict": true,
-    "skipLibCheck": true
+    "skipLibCheck": true,
+    "moduleResolution": "node"
   }
 }
\ No newline at end of file

packages/create-llama/templates/types/streaming/nextjs/app/api/chat/engine/index.ts

+import { LLM, SimpleChatEngine } from "llamaindex";
+
+export async function createChatEngine(llm: LLM) {
+  return new SimpleChatEngine({
+    llm,
+  });
+}

packages/create-llama/templates/types/streaming/nextjs/app/api/chat/route.ts

 import { Message, StreamingTextResponse } from "ai";
 import { OpenAI } from "llamaindex";
 import { NextRequest, NextResponse } from "next/server";
-import { createChatEngine } from "../../../../../../engines/context";
+import { createChatEngine } from "./engine";
 import { LlamaIndexStream } from "./llamaindex-stream";
 
 export const runtime = "nodejs";