"Vibe Coding" LangGraph apps with llms.txt and MCP
llms.txt is an emerging standard to provide LLMs with information about a website with brief background information, guidance, and links to detailed markdown files. Here, we create a simple MCP server to expose llms.txt to any MCP host (Claude Code/Desktop, Cursor, Windsurf) and make tool calls to fetch / read URLs from from llms.txt. We introduce llms.txt files for LangGraph and use them with our MCP server to fetch docs as needed by any MCP host code agent, making retrieval visible to the user and easy to audit.
Repo:
https://github.com/langchain-ai/mcpdoc
LangGraph llms.txt files:
https:…
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Chapters (23)
Introduction to LLMs.txt Standard
0:20
Exploring LangGraph LLMs.txt Documentation
0:33
Demo Overview: Using LLMs.txt with Applications
0:44
Demo: LLMs.txt with MCP in Cursor
1:27
Demo: LLMs.txt with MCP in Windsurf
1:50
Demo: LLMs.txt with MCP in Claude Desktop
2:23
Explaining the Problem: IDEs and Document Loading
2:52
Cursor's Built-in Document Loading Demo
3:56
Limitations of Built-in Document Tools
4:11
Approaches for Adding Context to LLMs
4:23
Context Stuffing: Pros and Cons
5:01
Vector Indexing: Pros and Cons
5:28
LLMs.txt as Reference + Tool Calling Approach
6:02
Using MCP to Connect Tools to Applications
6:47
Setting Up the MCP Server
7:20
Testing the MCP Server with Inspector
8:00
Connecting the MCP Server to Cursor
8:46
Demo: Using MCP Tools in Cursor (Revisited)
9:13
Connecting MCP Server to Windsurf
9:26
Connecting MCP Server to Claude Desktop
9:36
Demo: Using MCP with Claude Code
10:03
Conclusion and Benefits of This Approach
10:36
Final Thoughts and Resources
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