Where Should You Use Codex? A Guide to CLI, App, Cursor, and Claude Code

Sun, 12 Apr 2026 00:00:00 +0900

Where Should You Use Codex? A Guide to CLI, App, Cursor, and Claude Code#

2026-04-12

These days, a lot of people are saying good things about Codex. But the moment you try to actually use it, things get confusing.

Should you use Codex CLI?
Is there a separate Codex App?
Should you install the Codex extension inside Cursor?
Or is it enough to simply choose a Codex model inside Cursor chat?
Should you connect it to Claude Code as a plugin?

I had the same questions, so I went through the official documentation and organized what I found. I tried to write this in a way that even beginners, or people who do not usually work with coding tools, can follow comfortably.

How to Add Coding Runtimes to an AI Agent Web Service

Sun, 19 Apr 2026 00:00:00 +0900

How to Add Coding Runtimes to an AI Agent Web Service#

2026-04-19

When you start designing or building an AI agent web service, one question shows up surprisingly early:

“If these agents are supposed to do real work, where does their coding ability actually come from?”

At first, it is tempting to think the answer is straightforward. Call a strong model API, add file editing, let it run shell commands, execute tests, and package the results. But once you look more closely, the problem expands fast.

Codex on Ted Factory

Where Should You Use Codex? A Guide to CLI, App, Cursor, and Claude Code

Where Should You Use Codex? A Guide to CLI, App, Cursor, and Claude Code#

How to Add Coding Runtimes to an AI Agent Web Service

How to Add Coding Runtimes to an AI Agent Web Service#