Projects
Selected work, articles, talks, and software
Books
Overview
Contributed to Chapter 1, “Getting Started with Vibe Coding,” in Feature 1: Vibe Coding Complete Guide.
It explains the basics of Vibe Coding, how to approach it, and what it can change in practice through concrete examples in accessible language.
Software Design February 2026 Issue
https://gihyo.jp/magazine/SD/archive/2026/202602
Software Design February 2026 Issue | Kindle Store | Amazon
https://amzn.to/3NBD7V7
Talks
Codex Meetup Tokyo #1
Overview
Gave a lightning talk at Codex Meetup Tokyo #1, held on March 19, 2026.
The talk was titled “Codex’s Strengths Through Spec-Driven Development,” highlighting three strengths of Codex in spec-driven development (SDD): the GPT model’s diligence, stable Agent Skills invocation, and rigorous review capabilities.
Codex's Strengths Through Spec-Driven Development
https://speakerdeck.com/beagle_dog_inu/shi-yang-qu-dong-kai-fa-dejian-rucodexnoqiang-mi
Codex Meetup Tokyo #1
https://aiau.connpass.com/event/384679/
Vibe Coding Feature from Software Design Feb Issue
Overview
Appeared as a panelist at an offline talk session bringing together all five contributors of the lead feature “Complete Guide to Vibe Coding” from Software Design magazine’s February 2026 issue.
The session was conducted in a free-form format where panelists discussed given topics.
Vibe Coding Feature from Software Design Feb Issue
https://wnb.connpass.com/event/383711/
Claude Code Meetup Tokyo #aimeetup
Overview
Knowledge-sharing slides prepared for Claude Code Meetup Tokyo (#aimeetup) held on December 22, 2025.
The talk was titled “How to Keep Claude Code Honest in Tests.”
Proposes ideas for using Rules and Skills to prevent Claude Code from writing sloppy tests.
How to Keep Claude Code Honest in Tests
https://speakerdeck.com/beagle_dog_inu/claude-codenitesutodele-wosasenaiji-shu
Claude Code Meetup Tokyo #aimeetup
https://aimeetup.connpass.com/event/378288/
Dev
MyKeireki
MyShorui
MyKaikei
BeagleOn
Koedit
cxreset
ccclog
Overview
A static web app for browsing Claude Code and Codex change histories in side-by-side Japanese and English tables.
Supports automatic fetching, update dates, monthly update counts, and content search.
Claude Code CHANGELOG Viewer
https://beagleworks.github.io/ccclog
ccclog - GitHub
https://github.com/beagleworks/ccclog
Preposition Quiz
ccreset
Setsuna
iCUE Restarter
Quiet Qualia
Overview
The website of Beagle Works.
Features a blog, portfolio, and more.
Quiet Qualia
https://blog.beagleworks.net/
Articles
How Boris Explained Using Claude Code in X Replies
Overview
An article collecting especially useful points from Boris Cherny’s replies on X about how to use Claude Code.
Received more than 50 Likes.
How Boris Explained Using Claude Code in X Replies
https://zenn.dev/beagle/articles/_0019_keypoints_from_responses_of_boris
AI Tool Usage and Impressions: End-of-2025 Edition
Overview
An article summarizing the AI-related subscriptions I was using at the end of 2025 and my impressions of them.
Earned one Zenn badge.
AI Tool Usage and Impressions: End-of-2025 Edition
https://zenn.dev/beagle/articles/_0018_2025_12_my_subscriptions_to_ai_tools
Looking Back Again at SDD and Specs
Overview
An article revisiting SDD (spec-driven development) and specs.
Reached #1 in Zenn’s Ideas trending ranking.
Received more than 100 Likes.
Looking Back Again at SDD and Specs
https://zenn.dev/beagle/articles/fd60745bc54de1
Trying Claude Code on the web
Overview
An article summarizing the basics of Claude Code on the web.
Reached #6 in Zenn’s Tech trending ranking.
Earned two Zenn badges.
Trying Claude Code on the web
https://zenn.dev/beagle/articles/bc6ef88dd68615
Trying Out GitHub's Spec Kit
Overview
An article about trying GitHub Spec Kit.
Received more than 100 Likes.
Trying Out GitHub's Spec Kit
https://zenn.dev/beagle/articles/7976e6ac40c762
Trying Qoder, Alibaba's AI IDE
Overview
An article summarizing Qoder.
Reached #10 in Zenn’s Tech trending ranking.
Earned one Zenn badge.
Trying Qoder, Alibaba's AI IDE
https://zenn.dev/beagle/articles/52fb87f10d537f
Recent Developments Around Kiro After Its Subscription Launch
Overview
An article covering Kiro’s updates and its subscription model.
Reached #1 in Zenn’s Ideas trending ranking.
Recent Developments Around Kiro After Its Subscription Launch
https://zenn.dev/beagle/articles/5360946ada5607
Trying Spec-Driven Development with Free GPT-5 for a Limited Time
Overview
An article about trying spec-driven development while GPT-5 was temporarily available for free in several coding tools.
Reached #2 in Zenn’s Ideas trending ranking.
Trying Spec-Driven Development with Free GPT-5 for a Limited Time
https://zenn.dev/beagle/articles/99e0a0f3f0db4b
A Quick Look Back at Kiro and Spec-Driven Development
Overview
An article summarizing Kiro and spec-driven development.
Reached #3 in Zenn’s Ideas trending ranking.
A Quick Look Back at Kiro and Spec-Driven Development
https://zenn.dev/beagle/articles/1dea6ff60b1143
2026
MyKeireki
MyShorui
Codex Meetup Tokyo #1
Overview
Gave a lightning talk at Codex Meetup Tokyo #1, held on March 19, 2026.
The talk was titled “Codex’s Strengths Through Spec-Driven Development,” highlighting three strengths of Codex in spec-driven development (SDD): the GPT model’s diligence, stable Agent Skills invocation, and rigorous review capabilities.
Codex's Strengths Through Spec-Driven Development
https://speakerdeck.com/beagle_dog_inu/shi-yang-qu-dong-kai-fa-dejian-rucodexnoqiang-mi
Codex Meetup Tokyo #1
https://aiau.connpass.com/event/384679/
MyKaikei
BeagleOn
Vibe Coding Feature from Software Design Feb Issue
Overview
Appeared as a panelist at an offline talk session bringing together all five contributors of the lead feature “Complete Guide to Vibe Coding” from Software Design magazine’s February 2026 issue.
The session was conducted in a free-form format where panelists discussed given topics.
Vibe Coding Feature from Software Design Feb Issue
https://wnb.connpass.com/event/383711/
Koedit
cxreset
ccclog
Overview
A static web app for browsing Claude Code and Codex change histories in side-by-side Japanese and English tables.
Supports automatic fetching, update dates, monthly update counts, and content search.
Claude Code CHANGELOG Viewer
https://beagleworks.github.io/ccclog
ccclog - GitHub
https://github.com/beagleworks/ccclog
Preposition Quiz
Software Design February 2026
Overview
Contributed to Chapter 1, “Getting Started with Vibe Coding,” in Feature 1: Vibe Coding Complete Guide.
It explains the basics of Vibe Coding, how to approach it, and what it can change in practice through concrete examples in accessible language.
Software Design February 2026 Issue
https://gihyo.jp/magazine/SD/archive/2026/202602
Software Design February 2026 Issue | Kindle Store | Amazon
https://amzn.to/3NBD7V7
ccreset
How Boris Explained Using Claude Code in X Replies
Overview
An article collecting especially useful points from Boris Cherny’s replies on X about how to use Claude Code.
Received more than 50 Likes.
How Boris Explained Using Claude Code in X Replies
https://zenn.dev/beagle/articles/_0019_keypoints_from_responses_of_boris
2025
AI Tool Usage and Impressions: End-of-2025 Edition
Overview
An article summarizing the AI-related subscriptions I was using at the end of 2025 and my impressions of them.
Earned one Zenn badge.
AI Tool Usage and Impressions: End-of-2025 Edition
https://zenn.dev/beagle/articles/_0018_2025_12_my_subscriptions_to_ai_tools
Setsuna
Claude Code Meetup Tokyo #aimeetup
Overview
Knowledge-sharing slides prepared for Claude Code Meetup Tokyo (#aimeetup) held on December 22, 2025.
The talk was titled “How to Keep Claude Code Honest in Tests.”
Proposes ideas for using Rules and Skills to prevent Claude Code from writing sloppy tests.
How to Keep Claude Code Honest in Tests
https://speakerdeck.com/beagle_dog_inu/claude-codenitesutodele-wosasenaiji-shu
Claude Code Meetup Tokyo #aimeetup
https://aimeetup.connpass.com/event/378288/
iCUE Restarter
Quiet Qualia
Overview
The website of Beagle Works.
Features a blog, portfolio, and more.
Quiet Qualia
https://blog.beagleworks.net/
Looking Back Again at SDD and Specs
Overview
An article revisiting SDD (spec-driven development) and specs.
Reached #1 in Zenn’s Ideas trending ranking.
Received more than 100 Likes.
Looking Back Again at SDD and Specs
https://zenn.dev/beagle/articles/fd60745bc54de1
Trying Claude Code on the web
Overview
An article summarizing the basics of Claude Code on the web.
Reached #6 in Zenn’s Tech trending ranking.
Earned two Zenn badges.
Trying Claude Code on the web
https://zenn.dev/beagle/articles/bc6ef88dd68615
Trying Out GitHub's Spec Kit
Overview
An article about trying GitHub Spec Kit.
Received more than 100 Likes.
Trying Out GitHub's Spec Kit
https://zenn.dev/beagle/articles/7976e6ac40c762
Trying Qoder, Alibaba's AI IDE
Overview
An article summarizing Qoder.
Reached #10 in Zenn’s Tech trending ranking.
Earned one Zenn badge.
Trying Qoder, Alibaba's AI IDE
https://zenn.dev/beagle/articles/52fb87f10d537f
Recent Developments Around Kiro After Its Subscription Launch
Overview
An article covering Kiro’s updates and its subscription model.
Reached #1 in Zenn’s Ideas trending ranking.
Recent Developments Around Kiro After Its Subscription Launch
https://zenn.dev/beagle/articles/5360946ada5607
Trying Spec-Driven Development with Free GPT-5 for a Limited Time
Overview
An article about trying spec-driven development while GPT-5 was temporarily available for free in several coding tools.
Reached #2 in Zenn’s Ideas trending ranking.
Trying Spec-Driven Development with Free GPT-5 for a Limited Time
https://zenn.dev/beagle/articles/99e0a0f3f0db4b
A Quick Look Back at Kiro and Spec-Driven Development
Overview
An article summarizing Kiro and spec-driven development.
Reached #3 in Zenn’s Ideas trending ranking.
A Quick Look Back at Kiro and Spec-Driven Development
https://zenn.dev/beagle/articles/1dea6ff60b1143