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Apr 27, 202601

Why SpaceX Is Paying $60B for Cursor — And How Cursor Actually Works Under the Hood

On April 21, 2026, SpaceX announced an option to acquire Cursor for $60 billion later this year. This post unpacks the actual architecture that makes Cursor feel like a senior engineer — local indexing, Merkle-tree change detection, Tree-sitter AST chunking, Turbopuffer vector search, and the Composer agent model — then breaks down the three strategic reasons this deal is really about who owns the AI stack.

Apr 26, 202602

WebSockets Are an HTTP Request That Stops Being HTTP

WebSockets disguise themselves as HTTP, then drop the disguise the moment they're past the firewall. That trick is the entire reason real-time works on the web — and the entire reason WebSockets break your load balancer, your thread pool, and your deploys. This post walks through the four promises of HTTP, how SSE bends one of them, how WebSockets break three, and what production teams have to rebuild because of it.

Apr 22, 202603

How Big Tech Checks Username Uniqueness at Billion-User Scale

When you type a username and instantly see 'already taken', there's a multi-layer stack doing the work: a probabilistic filter, an in-memory cache, a distributed index, and a load balancer in front of all of them. This post breaks down each data structure, its trade-offs, and how Google, Meta, and Amazon combine them to answer one simple yes/no question in milliseconds across billions of users.

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Mar 23, 202601

Nvidia Just Made AI Agents Enterprise-Ready. Here's What Actually Happened.

Jensen Huang called OpenClaw 'the most important software release, probably ever' — comparing it to Linux, HTML, and Kubernetes in the same breath. Bold claim. But after digging into what Nvidia actually built around it, I think he might be right.

Mar 17, 202602

5 Brutal Truths Nobody Taught Me About Programming (But Should Have)

I've been writing code for years. Read the books. Studied the patterns. Nailed the algorithms. And yet — the lessons that actually made me a better developer? None of them came from a textbook. Every single one came from something breaking, a user doing something unexpected, or me staring at a screen at midnight wondering where it all went wrong.

Mar 16, 202603