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greymoth

19, Tokyo. I build more than I can ship — and I'm honest about the graveyard behind me. Prolific, AI-native, JP-native, hype-allergic. Working the last mile in public.

Location Tokyo, Japan Joined Joined on  Personal website https://glovrex.com github website twitter website
A searchable corpus of CJK and Unicode bugs in open-source libraries

A searchable corpus of CJK and Unicode bugs in open-source libraries

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4 min read

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Your main input handles IME composition. The rename box next to it doesn't.

Your main input handles IME composition. The rename box next to it doesn't.

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Japan-readiness is a cliff, not a gradient: what 92 dev tools' front doors actually look like

Japan-readiness is a cliff, not a gradient: what 92 dev tools' front doors actually look like

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6 min read
I find Japan-shaped holes in global software

I find Japan-shaped holes in global software

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4 min read
how to build a CJK/IME regression suite for a terminal or editor app

how to build a CJK/IME regression suite for a terminal or editor app

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5 min read
I tested whether AI coding agents break on Japanese input

I tested whether AI coding agents break on Japanese input

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3 min read
the bugs that only break in Japanese (and how to find them in someone else's repo)

the bugs that only break in Japanese (and how to find them in someone else's repo)

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3 min read
the bug a merged fix forgot: how i find first OSS contributions that actually merge

the bug a merged fix forgot: how i find first OSS contributions that actually merge

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5 min read
I scanned 15 funded developer tools for Japan-readiness. Every one scored F.

I scanned 15 funded developer tools for Japan-readiness. Every one scored F.

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2 min read
The Japan-readiness Standard

The Japan-readiness Standard

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the same few bugs keep hiding in libraries you already trust

the same few bugs keep hiding in libraries you already trust

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5 min read
"Personas vs. tool-scoping: where I landed differently from gstack"

"Personas vs. tool-scoping: where I landed differently from gstack"

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3 min read
"Read-Only Reviewer Agents Catch What Your Main Agent Waves Through"

"Read-Only Reviewer Agents Catch What Your Main Agent Waves Through"

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"Your Repo Is the Memory. Your Model Is the Worker."

"Your Repo Is the Memory. Your Model Is the Worker."

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"I Found ~30 Mergeable OSS Bugs in a Day. They Were All the Same Shape."

"I Found ~30 Mergeable OSS Bugs in a Day. They Were All the Same Shape."

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Stop using the model as your memory

Stop using the model as your memory

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3 min read
I built a Reddit reply-bot to find posts worth answering. Then I deleted the part that posts.

I built a Reddit reply-bot to find posts worth answering. Then I deleted the part that posts.

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3 min read
Your AI-tool usage is invisible. Here are 4 tiny local tools to see it.

Your AI-tool usage is invisible. Here are 4 tiny local tools to see it.

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What I learned shipping 4 Japanese-i18n PRs into real OSS as a faceless 19yo

What I learned shipping 4 Japanese-i18n PRs into real OSS as a faceless 19yo

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5 min read
I scored 40 dev tools on Japan-readiness. 0 of 40 have a Tokushoho (特商法) page.

I scored 40 dev tools on Japan-readiness. 0 of 40 have a Tokushoho (特商法) page.

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2 min read
I built 128 things with AI. 127 are dead. So I started shipping into real OSS instead.

I built 128 things with AI. 127 are dead. So I started shipping into real OSS instead.

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I built 128 things with AI in 4 months. Then I made an AI dissect all of it.

I built 128 things with AI in 4 months. Then I made an AI dissect all of it.

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I built a 5-second CLI to check if your site is ready for the Japanese market

I built a 5-second CLI to check if your site is ready for the Japanese market

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2 min read
The Enter key that quietly breaks Japanese input (and how to test if your app does it)

The Enter key that quietly breaks Japanese input (and how to test if your app does it)

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2 min read
Where foreign dev-tools quietly lose the Japanese market — and a free index to check your own

Where foreign dev-tools quietly lose the Japanese market — and a free index to check your own

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4 min read
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