6+ hour, 43+ min ago  (227+ words) Today I spent hours chasing a bug that looked impossible. When I clicked "Add Cabin", nothing happened. At first, I thought the problem was in my React state. Then I thought it was styled-components. Then I suspected Prop Types. I…...

6+ hour, 28+ min ago  (524+ words) We Built an AI That Can Diagnose Production Incidents in Seconds Every software engineer has experienced this moment. Pager Duty wakes up the on-call engineer. CPU usage has spiked. Services are returning 503. Users can't log in. The dashboards are filled…...

6+ hour, 38+ min ago  (271+ words) Go 1. 22 gave us sql. Null[T] " a generic nullable type for SQL. Problem solved? No. Try marshaling it to JSON: That's not "Alice". That's not null. That's a broken API response. This is a permanent gap in Go's standard library....

2+ hour, 54+ min ago  (1856+ words) Today we deploy a website on our own server You press "deploy" on Vercel and the site works. Domain, HTTPS, fast images, pages that update themselves. That is the trap. It looks like Vercel is one thing. Vercel is about…...

7+ hour, 22+ min ago  (422+ words) For the past two years, most of us integrated AI into our workflow using a "ping-pong" model: we write a prompt, get some code, copy-paste it, hit a bug, and paste the error back. But in 2026, the tech stack is…...

7+ hour, 28+ min ago  (700+ words) The "550 SPF Check Failed" error indicates that a receiving mail server rejected an incoming email. This rejection occurs because the sender's domain failed its Sender Policy Framework (SPF) validation. SPF is an email authentication protocol defined in RFC 7208. SPF helps…...

7+ hour, 11+ min ago  (453+ words) Ask a team how they handle AI safety in production and you'll get the same answer almost every time: an input classifier, an output classifier, maybe a moderation API bolted on the side. This is the content-moderation mental model" filter…...

1+ day, 17+ hour ago  (76+ words) Console & Output Control Source Location & Timestamps File Directories & Root Dir Scheduler & Background Tasks Switching from Other Libraries When root_dir is set, relative paths are resolved against it: Absolute paths are unaffected by root_dir: Console outputs are not affected by root_dir: Directory creation requires…...

1+ week, 2+ day ago  (1219+ words) This article is originally published on my personal blog. I gave a pod 500m CPU and then went inside and asked Python how many CPUs it could see. The answer was 20, and that seemed worth understanding. I start by checking what…...

5+ hour, 55+ min ago  (26+ words) A successful deployment is one that users never notice." " Building an application is "...