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Goodbye WordPress: Game Seisaku Kobo has migrated to EmDash, a new-era CMS

SoftwareFirst seen October 25, 2026264 points

A Japanese tech blog, 'ゲ制工房', moved from WordPress to a new content management system (CMS) called EmDash, which runs on Cloudflare. The author did the move in one day, with most of the work done by an AI tool.

The blog moved to EmDash

The author moved the blog 'ゲ制工房' from WordPress to EmDash. EmDash is a new CMS that runs on Cloudflare's servers. The move took about one day. The AI tool Claude Code did almost all the work. The article also explains why the author left WordPress, what EmDash is, and what to check before moving.

Why leave WordPress?

In October 2026, a serious security flaw called 'PHP2Shell' was found in PHP, the language WordPress is built on. Someone could run code on a server just by sending a specially made message, without logging in. The author said WordPress users had to rush to update each time such news appeared. The author also found WordPress hard to use with AI, because its saved posts mix HTML and block comments. The author already liked Cloudflare and wanted the blog on the same platform as the other sites.

What is EmDash?

Cloudflare announced EmDash in April 2026 as an open-source CMS. Cloudflare calls it the 'spiritual successor' of WordPress. It is written in TypeScript and built on the Astro web framework. It does not use WordPress code, so PHP and WordPress themes and plugins do not run on it. The stable version, 'EmDash 1.0', was released on September 28, 2026. The CMS admin and the website are one app. Articles are saved in a database and loaded each time a page is shown.

Key facts

PHP2Shell severity: CVSS v4.0 score of 9.2 out of 10
EmDash was announced in April 2026
EmDash 1.0 was released on September 28, 2026
The blog runs on Cloudflare Workers (app), D1 (database), and R2 (file storage)
The author spent about one day on the move

Why it matters

The story shows a growing trend: people want content systems that AI tools can edit easily. EmDash stores articles as structured parts, such as headings, paragraphs, and images. This lets AI edit a single paragraph or image. The author used AI to fix typos across old posts. The article also notes that AI is not perfect for complex formatting, so the admin editor is still needed for some tasks.

Glossary

EmDash: A free, open-source CMS from Cloudflare that runs on Astro and stores content in a database.
CMS: Content Management System, a tool for writing and publishing website content without coding.
PHP2Shell: A serious PHP security flaw that lets attackers run code on a server without logging in.
Cloudflare: A company that provides web services, servers, and tools to run websites and apps.