added working langgraph implementation

Author: divvyam-arora

README.md

@@ -13,15 +13,16 @@ chatwithdelta is the typescript version of the cli tool, based on the ui provide
 
 ```bash
 # First time only
-npm install 
+bun install 
 ```
 
 ```bash
 export EMAIL_TARGET="your_email"
 export SYSTEM_NAME="Delta"
 export UIUC_API_KEY="your_uiuc_api_key"
 export UIUC_COURSE_NAME="Delta-Documentation"
-npm run start
+export MODEL_URL="pre_hosted_uiuc.chat_llm_url"
+bun run start
 ```
 
 If you don't have an API key you can get one by creating an account at https://uiuc.chat and selecting the API tab were you can get your key. 

bun.lock

@@ -5,15 +5,20 @@
     "bin": "dist/index.js",
     "type": "module",
     "engines": {
-        "node": ">=16"
+        "node": ">=16",
+        "bun": ">=1.0.0"
     },
     "scripts": {
-        "dev": "ts-node-dev -r tsconfig-paths/register --respawn --no-pretty --exit-child src/index.tsx",
-        "build": "tsc && chmod +x dist/index.js",
-        "start": "npm run build && node dist/index.js",
-        "pretest": "npm run build"
+        "build": "bun build --target bun index.tsx --outdir dist",
+        "start": "bun run src/index.tsx",
+        "dev": "bun --watch src/index.tsx",
+        "pretest": "bun run build"
     },
     "dependencies": {
+        "@langchain/core": "^0.3.61",
+        "@langchain/langgraph": "^0.3.5",
+        "@langchain/community": "^0.3.47",
+        "langchain": "^0.3.29",
         "@react-email/render": "^1.1.2",
         "@types/better-sqlite3": "^7.6.13",
         "better-sqlite3": "^11.10.0",
@@ -43,4 +48,4 @@
         "tsconfig-paths": "^4.2.0",
         "typescript": "^5.0.3"
     }
-}
+}

chatwithDelta/package.json

@@ -5,6 +5,7 @@ const envSchema = z.object({
   SYSTEM_NAME: z.string(),
   UIUC_API_KEY: z.string(),
   UIUC_COURSE_NAME: z.string(),
+  MODEL_URL: z.string(),
 });
 
 // Log current environment variables
@@ -13,13 +14,16 @@ console.log('EMAIL_TARGET:', process.env['EMAIL_TARGET']);
 console.log('SYSTEM_NAME:', process.env['SYSTEM_NAME']);
 console.log('UIUC_COURSE_NAME:', process.env['UIUC_COURSE_NAME']);
 console.log('UIUC_API_KEY:', process.env['UIUC_API_KEY'] ? '***' : 'not set');
+console.log('MODEL_URL:', process.env['MODEL_URL'] ? '***' : 'not set');
 
 // Only set defaults if environment variables are not already set
 if (!process.env['SYSTEM_NAME']) process.env['SYSTEM_NAME'] = 'Delta';
 if (!process.env['UIUC_COURSE_NAME']) process.env['UIUC_COURSE_NAME'] = 'Delta-Documentation';
 if (!process.env['EMAIL_TARGET']) process.env['EMAIL_TARGET'] = '[email protected]';
 
+
 /**
  * Parsed environment variables.
  */
+
 export const env = envSchema.parse(process.env);