Update requirements.txt

requirements.txt

@@ -1,12 +1,29 @@
-langchain
+# Core LangChain stack
 langchain-groq
-langchain-google-genai
+langchain-core
 langchain-community
 langgraph
-gradio
-python-dotenv
-wikipedia
-ddgs
-requests
+ 
+# Groq SDK (used by langchain-groq under the hood)
+groq
+ 
+# Data / file processing
 pandas
-beautifulsoup4
+openpyxl          # required by pandas for .xlsx read/write
+ 
+# Web tools
+requests
+beautifulsoup4
+duckduckgo-search  # powers DuckDuckGoSearchRun
+ 
+# Wikipedia loader
+wikipedia
+ 
+# YouTube transcript (for video questions)
+youtube-transcript-api
+ 
+# Gradio UI
+gradio
+ 
+# Env vars
+python-dotenv