Support Running Multiple Background Jobs in Parallel

What feature would you like to see?

everyone would like Codex to be able to run multiple background bash jobs in parallel without restrictions, similar to running with '&' in a shell. The agent should be able to execute any number of background jobs simultaneously, manage and monitor them, and there should be no artificial constraints on what commands or scripts it can run in the background. This would unlock more advanced automation, scripting, and multi-process workflows, making Codex a much more powerful tool for real-world tasks.

Are you interested in implementing this feature?

Yes, I am interested in implementing this functionality myself.

Additional information

Ideally, background jobs should work reliably across platforms (Linux, macOS, Windows). There should be no sandbox or policy restrictions preventing parallel execution, and the agent should have the ability to execute arbitrary commands as background jobs. If there are any security or architectural considerations, please highlight them before implementation.