Codex does not use the browser or computer plugin in the main agent

What version of the Codex App are you using (From “About Codex” dialog)?

Version 26.601.21317 • Released 2026. 6. 3.

What subscription do you have?

Plus

What platform is your computer?

Microsoft Windows NT 10.0.26300.0 x64

What issue are you seeing?

The codex always says

There is no Browser/Computer tool or I will call a new subagent to open the browser.

It happens on GPT-5.4-Mini frequently.

<img width="752" height="166" alt="Image" src="https://github.com/user-attachments/assets/b0097611-4b9d-4412-ac17-6e0db3ce865d" />

In this picture, codex doesn't want to use node_repl or read a skill to use th computer.

On past releases, Mini models read the skill and used real Computer plugin, but on this release, Codex uses shell to do it.

What steps can reproduce the bug?

Choose GPT-5.4 Mini on model picker and send @Browser open example.com

It will call a subagent.

What is the expected behavior?

The main agent should read Computer/Browser SKILL and should premorm computer or browser actions with node_repl.

Additional information

_No response_