A real build log of learning to ship software with AI
Written by a university student in Japan, in a second language, with no shortcuts and no invented numbers.
Latest posts
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What it's like to let Claude Code subagents run a company
Seven AI subagents — CEO, secretary, researcher, writer, marketer, designer, programmer — actually make the decisions behind this site and two other projects. This post is the output of that system, and the honest numbers are still zero.
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A tool for makers who are guessing at their own prices
A browser tool that turns ingredient costs into a real profit margin — plus a correction to something I got wrong in my first post.
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I built a free tool with a Pro tier that doesn't work yet
A browser-only image/PDF tool with a freemium model designed into the UI — and why I'd rather admit the payment system isn't live than dress up a fake "coming soon".
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I built a product catalog tool for shop owners who can't code
Two working prototypes for local shops whose websites don't show their products clearly — including the bug I hit and the limitation I haven't fixed yet.
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Why I'm building this site (and what "AI build log" actually means)
The honest starting point: no traffic yet, no income yet, no audience yet. Here's what I've actually built so far and why I'm documenting it in English.
More posts will be added as new tools get built. This is a slow, real project — not a daily-posting content mill.