Feature request: Claude Code-like /monitoring for background terminals

Summary

Request a Claude Code-like /monitoring workflow for background terminals in Codex.

This includes:

• a dedicated monitored view for running background terminals
• readiness / warning / error pattern detection surfaced in the TUI
• a targeted stop action for a single background terminal by process_id
• a slash-command UX similar to Claude Code-style monitoring flows

Proposed UX

• /monitors to show monitored background terminals
• /monitor-stop <process_id> to stop one monitored terminal
• inline TUI notifications when a monitored terminal emits ready / warning / error signals

Implementation branch

A working implementation was prepared here:

• compare URL: https://github.com/openai/codex/compare/main...wolverin0:feat/monitor-background-terminals?expand=1
• fork branch: wolverin0:feat/monitor-background-terminals
• commit: 535e61f

Notes

PR creation is currently blocked by permissions for openai/codex, so this issue is being opened first to track the feature request and proposed implementation.