I Thought I Had My Own Dark Factory—Then Response Time Died

The web app I’ve been building on my own is finally getting close to Closed Alpha. I’m pretty happy about it. This time, I’ve been seriously trying to develop it in something close to a dark factory style. I say, “I want a feature like this.” AI writes the code. It writes the tests. It runs them. If something is wrong, it fixes it. I check what came out and give it the next instruction. ...

2026-10-06 · 7 min · 1355 words · ayasuda

Where Did the Implementation Train Come From?

For a while, Claude Code kept using the phrase “implementation train” in one of my personal projects. Implementation train. What the hell is that? At first, I thought it might be a real term. I had never seen it in Japanese, but maybe “Implementation Train” or something like it had become popular in English-speaking developer circles. Apparently not. When I traced it back through the old documentation, it looked like Claude Code had once compared something to a train. That sentence survived somewhere in the docs. ...

2026-09-23 · 5 min · 983 words · ayasuda

I Can't Read the PR Claude Wrote for Me

Lately, I can’t read the PRs Claude writes for me. Well, I can still understand the title. “Add feature X,” “Fix bug Y.” So far, so good. It’s the body that’s the problem. Nope. You’ve lost me. What on earth are you talking about? Maybe this is my own fault. I can’t rule out the possibility that watching too many short videos and scrolling X has damaged my ability to read long passages. ...

2026-09-21 · 7 min · 1294 words · ayasuda