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Lee Robinson

@leerob • 272,058 subscribers

Model behavior @cursor_ai. Helping train useful models.

Shorts

I built an app to simulate the 2026 NCAA tournament! It uses historical data, KenPom rankings, game locations, and more to determine the win probability. ...but then has an AI model review the results and prompt for the reality of March Madness, unpredictable!

I built an app to simulate the 2026 NCAA tournament! It uses historical data, KenPom rankings, game locations, and more to determine the win probability. ...but then has an AI model review the results and prompt for the reality of March Madness, unpredictable!

427,909 views

"My favorite enterprise AI service is Cursor [...] Every one of our engineers, 100%, is now assisted by AI coders and our productivity has gone up incredibly."

"My favorite enterprise AI service is Cursor [...] Every one of our engineers, 100%, is now assisted by AI coders and our productivity has gone up incredibly."

384,089 views

My latest experiment… Built a game with Cursor! It’s written in Verilog, which compiles to a bitstream that programs the FPGA 🤯 Has been fun to learn more about hardware and game dev.

My latest experiment… Built a game with Cursor! It’s written in Verilog, which compiles to a bitstream that programs the FPGA 🤯 Has been fun to learn more about hardware and game dev.

151,565 views

In the next release of Cursor: custom /slash commands!

In the next release of Cursor: custom /slash commands!

191,370 views

Is this... vibe coding? 🦋

Is this... vibe coding? 🦋

179,665 views

Cursor tip: if you're doing web dev, there's an integrated browser! The agent can read console logs, network requests, and even control the browser to do automated testing for you. You don't have to install any third-party MCP servers, just works 😄

Cursor tip: if you're doing web dev, there's an integrated browser! The agent can read console logs, network requests, and even control the browser to do automated testing for you. You don't have to install any third-party MCP servers, just works 😄

106,182 views

Next.js template to search/filter/paginate 600,000 books. ✨next-books-search​.​vercel​.app✨

Next.js template to search/filter/paginate 600,000 books. ✨next-books-search​.​vercel​.app✨

194,062 views

Building a lil' bookmarks app with v0

Building a lil' bookmarks app with v0

170,837 views

I built a clone of the Yeezy store with Next.js. This was a fun challenge — the site has some smooth animations and feels very fast. But it was bothering me that I couldn't use the browser back button. Can we do better? So I rebuilt the site with v0 and Motion. Here's how it works: 1. When you click on a product, Motion is able to animate the original position of the product in the grid, to the zoomed in product detail page. 2. During this transition, we also shallow update the URL with the `/p/slug` route for the page. 3. If you press the back button in the navbar, or use the browser back button, or press escape — all options will take you back to the main product listing page. 4. If you reload the page while looking at a product, or someone sends you a link to a specific product, it still works! This is the best parts of a SPA and MPA mixed together. In the future, I can make this even better with View Transitions (I wasn't able to get the product animation just right, but if you can I'd love to see it!). I also took some creative liberties from the original design. The whole 1/2/3 size thing, where you needed to click the "?" to see SM/MD/LG was strange, so I just went directly to those sizes. Similarly, I prefered the more traditional style sheet/modal with the background color change, versus the full screen takeover. If you wanted to actually hook this up to Shopify now, you can swap the cart implementation with Next.js Commerce, which has all the APIs you need + optimistic writes 🔥 Should I make a video walking through the code?

I built a clone of the Yeezy store with Next.js. This was a fun challenge — the site has some smooth animations and feels very fast. But it was bothering me that I couldn't use the browser back button. Can we do better? So I rebuilt the site with v0 and Motion. Here's how it works: 1. When you click on a product, Motion is able to animate the original position of the product in the grid, to the zoomed in product detail page. 2. During this transition, we also shallow update the URL with the `/p/slug` route for the page. 3. If you press the back button in the navbar, or use the browser back button, or press escape — all options will take you back to the main product listing page. 4. If you reload the page while looking at a product, or someone sends you a link to a specific product, it still works! This is the best parts of a SPA and MPA mixed together. In the future, I can make this even better with View Transitions (I wasn't able to get the product animation just right, but if you can I'd love to see it!). I also took some creative liberties from the original design. The whole 1/2/3 size thing, where you needed to click the "?" to see SM/MD/LG was strange, so I just went directly to those sizes. Similarly, I prefered the more traditional style sheet/modal with the background color change, versus the full screen takeover. If you wanted to actually hook this up to Shopify now, you can swap the cart implementation with Next.js Commerce, which has all the APIs you need + optimistic writes 🔥 Should I make a video walking through the code?

148,840 views

It's pretty neat to easily control a Linux computer in the cloud. For this one, I added an AI sidebar which can control and navigate pages.

It's pretty neat to easily control a Linux computer in the cloud. For this one, I added an AI sidebar which can control and navigate pages.

11,917 views

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My talk from AI Engineer is now live! It covers how we're automating parts of AI research and building systems to rapidly improve our models. I cover some of the work our team did to train Grok 4.5 together with SpaceXAI.
19:36
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My talk from AI Engineer is now live! It covers how we're automating parts of AI research and building systems to rapidly improve our models. I cover some of the work our team did to train Grok 4.5 together with SpaceXAI.

Lee Robinson

116,527 views • 2 days ago

Introducing Cursor Learn! My first course is a six-part video series on AI foundations. It's designed for beginners to learn concepts like tokens, context, and agents. If you prefer to read, there's quizzes + AI models to try out. You can watch it in ~1 hour, 100% free!
4:02
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Introducing Cursor Learn! My first course is a six-part video series on AI foundations. It's designed for beginners to learn concepts like tokens, context, and agents. If you prefer to read, there's quizzes + AI models to try out. You can watch it in ~1 hour, 100% free!

Lee Robinson

1,448,885 views • 9 months ago

My friend is a 10x software engineer. He is insanely gifted. We were looking at the Yamauchi No.10 Family Office website together years ago and I asked him what it would cost to build it today. I will never forget his answer… "We can’t, we don’t know how to do it."
0:22
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My friend is a 10x software engineer. He is insanely gifted. We were looking at the Yamauchi No.10 Family Office website together years ago and I asked him what it would cost to build it today. I will never forget his answer… "We can’t, we don’t know how to do it."

Lee Robinson

381,586 views • 2 months ago

It's 2026. AI writes most of my code. Now what?
10:17
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It's 2026. AI writes most of my code. Now what?

Lee Robinson

902,271 views • 6 months ago

Cursor just got a major upgrade! Agents can onboard to your codebase, use a cloud computer to make changes, and send you a video demo of their finished work. The latency of using the remote desktop is smooooth.
3:11
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Cursor just got a major upgrade! Agents can onboard to your codebase, use a cloud computer to make changes, and send you a video demo of their finished work. The latency of using the remote desktop is smooooth.

Lee Robinson

548,443 views • 4 months ago

Learn how to use coding agents in 30 minutes! This course teaches you how to build software with agents: plan new features, fix bugs, review and test code, and more. It's 100% free and these concepts apply to any agent!
31:42
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Learn how to use coding agents in 30 minutes! This course teaches you how to build software with agents: plan new features, fix bugs, review and test code, and more. It's 100% free and these concepts apply to any agent!

Lee Robinson

299,769 views • 3 months ago

I built a Rust-based image compressor, WASM binary, and SvelteKit app! I wanted to see how far I could go using only coding agents. I did not write any code by hand. After 520 agents, 350M tokens, and $287 I can now say… extremely far.
0:35
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I built a Rust-based image compressor, WASM binary, and SvelteKit app! I wanted to see how far I could go using only coding agents. I did not write any code by hand. After 520 agents, 350M tokens, and $287 I can now say… extremely far.

Lee Robinson

564,272 views • 6 months ago

Rules, commands, MCP servers, subagents, modes, hooks, skills... There's a lot of stuff! And tbh it's a little confusing. Here's what you need to know (and how we got here).
7:16
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Rules, commands, MCP servers, subagents, modes, hooks, skills... There's a lot of stuff! And tbh it's a little confusing. Here's what you need to know (and how we got here).

Lee Robinson

448,350 views • 6 months ago

Learn how to use Cursor Agent with 10 tips: 1. Plan mode 2. Context menu 3. Custom commands 4. Images 5. Duplicating chats 6. Context visibility 7. Usage visibility 8. Keyboard shortcuts 9. New chats 10. Checkpoints And an extra bonus round!
12:31
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Learn how to use Cursor Agent with 10 tips: 1. Plan mode 2. Context menu 3. Custom commands 4. Images 5. Duplicating chats 6. Context visibility 7. Usage visibility 8. Keyboard shortcuts 9. New chats 10. Checkpoints And an extra bonus round!

Lee Robinson

590,066 views • 9 months ago

URL state is underrated. Here's an example of how we built Next.js commerce with almost zero `useState` calls.
1:55
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URL state is underrated. Here's an example of how we built Next.js commerce with almost zero `useState` calls.

Lee Robinson

1,113,818 views • 2 years ago

How are coding agents changing software engineering? Yapped for 15 minutes about new Cursor data we published, including: 1. Why lines of code is an imperfect measure of AI progress 2. Balancing intelligence/cost/speed for models 3. Code reviews with "Mega PRs" (1000+ lines)
15:56
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How are coding agents changing software engineering? Yapped for 15 minutes about new Cursor data we published, including: 1. Why lines of code is an imperfect measure of AI progress 2. Balancing intelligence/cost/speed for models 3. Code reviews with "Mega PRs" (1000+ lines)

Lee Robinson

58,764 views • 1 month ago

📹 Self-Hosting Next.js Learn how to deploy Next.js, Postgres, and Nginx to a $4 VPS with Docker. I'll explain how to use and configure Next.js features like image optimization, caching & ISR, streaming, middleware, server components, and more. Demo app is open source!
45:12
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📹 Self-Hosting Next.js Learn how to deploy Next.js, Postgres, and Nginx to a $4 VPS with Docker. I'll explain how to use and configure Next.js features like image optimization, caching & ISR, streaming, middleware, server components, and more. Demo app is open source!

Lee Robinson

568,290 views • 1 year ago

John moved away from Next.js – what went wrong? They felt the navigation was slow and ultimately ended up migrating away. Made a quick video to explain the different data fetching patterns building dashboard apps and how John can get snappy navigations without loading spinners.
5:14
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John moved away from Next.js – what went wrong? They felt the navigation was slow and ultimately ended up migrating away. Made a quick video to explain the different data fetching patterns building dashboard apps and how John can get snappy navigations without loading spinners.

Lee Robinson

425,282 views • 1 year ago

Cursor now has a built-in web browser. You can say "start my app" and it will run the dev server in a terminal and then navigate the browser to localhost:3000. It can take screenshots of the page for iterating on design, and you can send DOM elements to the agent with prompts!
0:24
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Cursor now has a built-in web browser. You can say "start my app" and it will run the dev server in a terminal and then navigate the browser to localhost:3000. It can take screenshots of the page for iterating on design, and you can send DOM elements to the agent with prompts!

Lee Robinson

216,134 views • 8 months ago

Cursor now natively supports git worktrees. You can run multiple agents in parallel, each with their own isolated copy of the codebase. This is great for comparing models or running the same model multiple times and picking the best result.
0:42
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Cursor now natively supports git worktrees. You can run multiple agents in parallel, each with their own isolated copy of the codebase. This is great for comparing models or running the same model multiple times and picking the best result.

Lee Robinson

157,666 views • 8 months ago

Just shipped a new Next.js template! • Uses Postgres and Drizzle for the database • UI components with Tailwind and shadcn/ui • Email/password authentication with JWTs stored to cookies • Dashboard pages with CRUD operations on users/teams • Basic RBAC with Owner and Member roles • Pricing page (/) which connects to Stripe Checkout • Subscription management with Stripe Customer Portal • Global middleware to protect logged-in routes • Local middleware to protect Server Actions / validate schemas • Activity logging system for any user events It's not finished, and there's probably bugs, but it's time to ship 🫡 • Demo: • Code:
1:06
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Just shipped a new Next.js template! • Uses Postgres and Drizzle for the database • UI components with Tailwind and shadcn/ui • Email/password authentication with JWTs stored to cookies • Dashboard pages with CRUD operations on users/teams • Basic RBAC with Owner and Member roles • Pricing page (/) which connects to Stripe Checkout • Subscription management with Stripe Customer Portal • Global middleware to protect logged-in routes • Local middleware to protect Server Actions / validate schemas • Activity logging system for any user events It's not finished, and there's probably bugs, but it's time to ship 🫡 • Demo: • Code:

Lee Robinson

362,516 views • 1 year ago

📹 Context Engineering & Coding Agents with Cursor From OpenAI DevDay
18:33
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📹 Context Engineering & Coding Agents with Cursor From OpenAI DevDay

Lee Robinson

159,074 views • 9 months ago

What's the difference between servers, serverless, and fluid compute?
5:05
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What's the difference between servers, serverless, and fluid compute?

Lee Robinson

212,964 views • 1 year ago

Long video (1hr) but wanted to show a practical example of refactoring an existing codebase with AI. I did dependency upgrades, ran codemods, combined/deleted files, and more. I used Cursor Tab & Agent, as well as coding things by hand (gasp!)
58:18
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Long video (1hr) but wanted to show a practical example of refactoring an existing codebase with AI. I did dependency upgrades, ran codemods, combined/deleted files, and more. I used Cursor Tab & Agent, as well as coding things by hand (gasp!)

Lee Robinson

139,669 views • 10 months ago

I spent 6 months trying code editors. My experience with Neovim, Zed, and Cursor.
24:45
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I spent 6 months trying code editors. My experience with Neovim, Zed, and Cursor.

Lee Robinson

178,277 views • 1 year ago