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Technical articles on web development, AI, and engineering. Written weekly by our engineers.
Loop Engineering — An Engineer's Job Is Now 『Writing Loops』
『My job is to write loops.』From prompts to loop design. A look at the new wave where abstraction climbs from Prompt→Context→Harness→Loop, plus the real-world risks of cost blowups and comprehension debt.
Who Runs example.com — The Truth About the Ad-Free 『Test Page』
Every engineer touches example.com at least once. With all that traffic, why does it stay a plain page without a single ad? We unpack who runs it and the technical reasons it will never be commercialized.
The Optimal DB Strategy for SMBs Building SaaS in the Vibe-Coding Era — Cloudflare D1 × Single-Tenant Smashes the DB Cost Wall
AI (vibe coding) has erased the cost of 『building』. Now the real question is the DB cost of running many services at scale.
Claude Mythos Won't Break the World: The Defenses That Actually Matter
Anthropic's 『Claude Mythos』 unearths old zero-days for 50 dollars — don't let the flashy headlines distract you. What you really need to defend against is the same well-worn attacks, with the same basic posture.
Could a Single Request Take Down Your Server? Why You Can't Ignore Multer's Vulnerabilities
If you've ever written a file upload handler in Node.js/Express, you've almost certainly used Multer. Between 2025 and 2026, seven HIGH-severity vulnerabilities were disclosed in the 1.x line — all fixed in 2.x. Here's how they work and how to fix them, explained with everyday analogies.