Mastering Codex Remote for engineering

What's new

• Remote host connections: pick which machine (Mac / Windows / devbox) a Codex session runs on.
• Worktrees: launch multiple parallel git worktrees for different attempts.
• Goals: long-running autonomy with checklist and verification.
• Side chats: side conversations without interrupting the main session.
• Inline code review: review and comment on code directly in Codex Remote UI.
• Queued + steering prompts: queue additional instructions or redirect a running task.
• Attachments, skills, plugins: extensions via custom tools and context.
• Archived threads: history with archival of old conversations.
• Security controls: per-host authorisation and access controls.

Why it matters

OpenAI explicitly frames Codex Remote as an 'engineering control plane' — a paradigm where the phone isn't where you code, but where you monitor and steer background work running elsewhere. Same direction as Claude Code Remote (Trusted Devices this week) and Cursor background agents. For developers this means 'on-call coding' from mobile becomes real: start a goal on the train, check progress over coffee, merge in the evening.

How to try

Codex Remote ships as part of the Codex plan (ChatGPT Plus and Team). Hosts are configured in the Codex Remote app (iOS/Android). Devboxes need OpenAI Codex CLI installed on the target machine.