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.

Tokyo, Japan Joined on May 18, 2026 https://glovrex.com

greymoth

Jun 29

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

#japan #i18n #webdev #unicode

4 min read

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greymoth

Jun 29

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

#javascript #react #i18n #a11y

4 min read

greymoth

Jun 28

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

#japan #localization #saas #devtools

6 min read

greymoth

Jun 28

I find Japan-shaped holes in global software

#javascript #i18n #react #webdev

4 min read

greymoth

Jun 28

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

#testing #i18n #ai #japanese

5 min read

greymoth

Jun 28

I tested whether AI coding agents break on Japanese input

#ai #opensource #i18n #japanese

3 min read

greymoth

Jun 28

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

#opensource #i18n #japanese #webdev

3 min read

greymoth

Jun 28

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

#opensource #beginners #github #tutorial

5 min read

greymoth

Jun 28

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

#japan #i18n #webdev

2 min read

greymoth

Jun 28

The Japan-readiness Standard

#japan #i18n #webdev

3 min read

greymoth

Jun 26

the same few bugs keep hiding in libraries you already trust

#opensource #debugging #programming #webdev

5 min read

greymoth

Jun 26

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

#claudecode #ai #agents #productivity

3 min read

greymoth

Jun 26

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

#claudecode #ai #productivity #opensource

4 min read

greymoth

Jun 26

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

#claudecode #productivity #ai #webdev

3 min read

greymoth

Jun 26

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

#opensource #productivity #claudecode #webdev

3 min read

greymoth

Jun 26

Stop using the model as your memory

#ai #claudecode #agents #productivity

3 min read

greymoth

Jun 25

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

#opensource #indiehackers #ai #webdev

3 min read

greymoth

Jun 25

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

#claude #ai #opensource #productivity

5 min read

greymoth

Jun 25

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

#opensource #i18n #beginners #career

5 min read

greymoth

Jun 25

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

#japan #devtools #localization #i18n

2 min read

greymoth

Jun 24

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

#opensource #japan #buildinpublic #webdev

1 min read

greymoth

Jun 22

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

#ai #buildinpublic #career #productivity

3 min read

greymoth

Jun 20

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

#japan #cli #webdev #opensource

2 min read

greymoth

Jun 20

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

#japan #i18n #webdev #a11y

2 min read

greymoth

Jun 20

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

#i18n #opensource #saas #japan

4 min read

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greymoth

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

Want to connect with greymoth?

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

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

I find Japan-shaped holes in global software

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

I tested whether AI coding agents break on Japanese input

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

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

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

The Japan-readiness Standard

the same few bugs keep hiding in libraries you already trust

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

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

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

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

Stop using the model as your memory

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

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

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

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

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

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

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

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

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