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Lee Robinson

@leerob • 283,515 subscribers

Model behavior @SpaceXAI. 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!

428,196 次观看

"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 次观看

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 次观看

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

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

191,464 次观看

Is this... vibe coding? 🦋

Is this... vibe coding? 🦋

179,927 次观看

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 😄

106,233 次观看

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 次观看

Building a lil' bookmarks app with v0

Building a lil' bookmarks app with v0

170,837 次观看

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?

148,937 次观看

Built this in 5 minutes with v0 in between feeding my baby 😁 Pasted a screenshot and made 3 more follow up edits. Even built a little abstract fake blurred out logo.

97,282 次观看

View Transitions API + Next.js:

View Transitions API + Next.js:

87,591 次观看

Superhuman by v0 1 screenshot, 20 iterations, ~30 minutes 🤯

Superhuman by v0 1 screenshot, 20 iterations, ~30 minutes 🤯

44,650 次观看

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 次观看

Videos

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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!

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!

1,449,751 次观看 • 11 个月前

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

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

903,274 次观看 • 8 个月前

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."

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."

382,055 次观看 • 4 个月前

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.

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.

549,937 次观看 • 6 个月前

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.

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.

125,774 次观看 • 1 个月前

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.

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.

564,699 次观看 • 8 个月前

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!

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!

299,769 次观看 • 4 个月前

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).

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).

448,838 次观看 • 7 个月前

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!

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!

590,596 次观看 • 10 个月前

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

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

1,113,882 次观看 • 2 年前

📹 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!

📹 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!

568,593 次观看 • 1 年前

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.

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.

425,867 次观看 • 1 年前

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!

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!

216,235 次观看 • 10 个月前

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:

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:

362,870 次观看 • 1 年前

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.

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.

157,666 次观看 • 10 个月前

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)

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)

59,013 次观看 • 3 个月前

📹 Context Engineering & Coding Agents with Cursor From OpenAI DevDay

📹 Context Engineering & Coding Agents with Cursor From OpenAI DevDay

159,074 次观看 • 10 个月前

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

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

212,964 次观看 • 1 年前

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!)

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!)

139,872 次观看 • 1 年前

How should you search, filter, and paginate data with Next.js? This demo has 50,000 books in a Postgres database. • Page Load: When the page loads, we see the React Suspense fallback. This loading skeleton is displayed until the first page of books is retrieved from the database. • Searching: The search input has a 200ms debounce. After 200ms of inactivity, the form submits, updating the URL state with `?q={search}`. The Server Component reads `searchParams` and queries the database. On form submission, a React transition starts, allowing us to read the pending status with `useFormStatus` to display an inline loading state. • State Preservation: Navigating to an individual book page retains the search input state. Reloading the page or sharing the link preserves the search results. • Client-side Filtering: Filtering authors in the left sidebar is done client-side. Authors are fetched by a Server Component and passed as props to the sidebar. Changing the input value updates React state and re-renders the sidebar. • Optimistic Updates: The sidebar’s selected authors are optimistically updated with `useOptimistic`. Checkbox selections update instantly without waiting for the URL to change. • State Preservation: Navigating to an individual book page retains the sidebar filter input and selected author state across navigations, giving it an app-like feel. • Pagination: Navigating between pages updates the URL state, triggering the Server Component to query the database for the specific page of books. We also fetch the total book count to show the total number of pages. This demo isn't perfect yet (still working on it) but it's been a fun playground for some of these patterns. You can imagine a similar experience for thousands of movies, cars, products, or any other very large dataset. Demo → Code →

How should you search, filter, and paginate data with Next.js? This demo has 50,000 books in a Postgres database. • Page Load: When the page loads, we see the React Suspense fallback. This loading skeleton is displayed until the first page of books is retrieved from the database. • Searching: The search input has a 200ms debounce. After 200ms of inactivity, the form submits, updating the URL state with `?q={search}`. The Server Component reads `searchParams` and queries the database. On form submission, a React transition starts, allowing us to read the pending status with `useFormStatus` to display an inline loading state. • State Preservation: Navigating to an individual book page retains the search input state. Reloading the page or sharing the link preserves the search results. • Client-side Filtering: Filtering authors in the left sidebar is done client-side. Authors are fetched by a Server Component and passed as props to the sidebar. Changing the input value updates React state and re-renders the sidebar. • Optimistic Updates: The sidebar’s selected authors are optimistically updated with `useOptimistic`. Checkbox selections update instantly without waiting for the URL to change. • State Preservation: Navigating to an individual book page retains the sidebar filter input and selected author state across navigations, giving it an app-like feel. • Pagination: Navigating between pages updates the URL state, triggering the Server Component to query the database for the specific page of books. We also fetch the total book count to show the total number of pages. This demo isn't perfect yet (still working on it) but it's been a fun playground for some of these patterns. You can imagine a similar experience for thousands of movies, cars, products, or any other very large dataset. Demo → Code →

236,802 次观看 • 2 年前