All Posts - piljoong.devhttps://piljoong.dev/posts/All Posts | piljoong.devHugo -- gohugo.ioenkpiljoong@gmail.com (piljoong)kpiljoong@gmail.com (piljoong)kpiljoong@gmail.comMon, 11 May 2026 02:55:00 +0900Turning Agent Work Into a Systemhttps://piljoong.dev/posts/turning-agent-work-into-a-system/Mon, 11 May 2026 02:55:00 +0900piljoonghttps://piljoong.dev/posts/turning-agent-work-into-a-system/<p>In the last post, I argued that prompting is not the system.</p> <p>The missing layer was the system that keeps work in a known, controlled state while it changes. That is what I started calling Ordo.</p>From Prompting to Context. Still Not the System.https://piljoong.dev/posts/from-prompting-to-context-still-not-the-system/Sat, 18 Apr 2026 01:15:00 +0900piljoonghttps://piljoong.dev/posts/from-prompting-to-context-still-not-the-system/<p>Early on, prompting felt like the core problem.</p> <p>If you wrote better prompts, you got better results. That framing made sense for a while.</p>AI Changed How We Build. It Did Not Change What Matters.https://piljoong.dev/posts/ai-changed-how-we-build/Tue, 07 Apr 2026 21:07:53 +0900piljoonghttps://piljoong.dev/posts/ai-changed-how-we-build/A view on engineering in the AI age

AI is powerful. That is no longer a theoretical point.

I spend far less time writing code from scratch than I used to. With a short prompt, I can generate something that would have taken hours or days before. I use that constantly now, and I don’t think there is any serious way to deny that the economics of building software have changed.

]]>The 10-Join Query Nobody Wanted to Debughttps://piljoong.dev/posts/the-10-join-query-nobody-wanted-to-debug/Sun, 25 Jan 2026 02:46:20 +0900piljoonghttps://piljoong.dev/posts/the-10-join-query-nobody-wanted-to-debug/The alert came in during business hours.

A seller-facing marketplace listing page was showing incorrect items. Products that should never appear in standard listings were suddenly visible. This wasn’t a cosmetic issue. It was a correctness problem in a read path users relied on.

]]>Distributed ID Formats Are Architectural Commitments, Not Just Data Typeshttps://piljoong.dev/posts/distributed-id-generation-complicated/Thu, 27 Nov 2025 11:16:56 +0900piljoonghttps://piljoong.dev/posts/distributed-id-generation-complicated/Most systems start with auto-increment IDs because it’s the easiest possible thing that works. The database hands you numbers, you store them, life is good. There’s something comforting about watching IDs tick upward in perfect sequence—12345, 12346, 12347.

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