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I made a video tutorial on a personal hack that can let Cursor AI build complex LLM Agents and greatly improve my productivity : https://youtu.be/wc9O-9mcObc

For example, in this tutorial, I mostly write the high-level design doc, and Cursor AI handles all the implementation and coding to build an AI YouTube Summarizer. The secret is Pocket Flow, a 100-line framework that fits easily into Cursor’s rules, remains flexible for all sorts of designs, and nudges Cursor to follow good coding practices.

Background of 100-line framework

I built this 100-line LLM framework over Christmas. It provides the core “graph abstraction” that LLM workflows need—for (multi-)agents, Retrieval-Augmented Generation (RAG), workflow, and more. I built this because:

1. Most big frameworks have messy abstractions, deprecated methods, and annoying dependencies that are very hard to use.

2. These issues don’t just confuse humans; they confuse AI coding assistants as well! For example, if you let Cursor AI build a LLM project with those frameworks, you’ll likely run into a bunch of version or deprecation errors.

So I stripped everything down to 100 lines, making it easy for AI tools (like Cursor AI) to read and build on top of it as “rules.” Surprisingly, Cursor understands Pocket Flow really well-its generated code is modular, maintainable, and has greatly boosted my productivity over the past year.

Demo in the YouTube Video

To demonstrate this further, I made this YouTube video showing exactly how I fed Cursor AI the Pocket Flow docs and a high-level design to build LLM apps. I asked Cursor AI to create a YouTube “explainer” agent that summarizes long videos into simple “5-year-old-friendly” terms—for instance, it can condense Lex Fridman’s 5-hour DeepSeek interview into a concise, sharp summary. The entire development took me less than an hour—and you can do the same!

I’m very new to YouTube, so please, please, please give me your feedback on which parts are unclear! If there’s another LLM project you’d like to see me build with Pocket Flow + Cursor, let me know!