Why does Codus say my coding agent is not installed?

“Not installed” means Codus cannot find the selected provider in the environment it is using. It does not prove your AI subscription is missing. Check that the provider starts in a fresh terminal on this computer, then use Check again in the Installation guide.

Before you start

Confirm which provider is selected. Installing Codex does not install Claude Code, and signing into Codus with GitHub does not sign into either AI provider.

On Windows, a provider installed only inside WSL is not the same as a native Windows installation available to PowerShell.

Check the installation

1. Open Terminal on Mac or PowerShell on Windows.
2. Run claude --version or codex --version for your selected provider. This asks the installed tool for its version.
3. If the command is missing, follow the Claude Code or Codex installation guide. Use the instructions for the same operating system and user account.
4. If a version appears, run claude or codex without the version option and complete any required sign-in.
5. Return to Installation guide in Codus and click Check again. If Codus was open during installation and still cannot find the tool, save work, quit Codus fully and reopen it.

Do not repeatedly append commands to shell configuration files or delete saved logins. The cause could be the installation location, shell, Windows/WSL mismatch or an app that has not picked up the installation yet.

If it still fails

Send support your Codus version, operating system, selected provider, the version-command result and the exact error. Hide credentials. A sign-in error, a missing executable and a provider-switch error need different fixes.

How do I know it worked?

The selected provider is available in Codus and starts into its own working prompt. Finding the executable is one check; completing its sign-in is another.