Show subagent task and model in /agents view

What variant of Codex are you using?

CLI

What feature would you like to see?

The /agents view should show the task each subagent is working on and the effective model being used.

Today the view exposes low-level identity such as the session/thread ID. That can be useful for debugging, but during normal parallel work it is less actionable than answering:

• What did I ask this subagent to do?
• Which model is it running on?
• Which agent should I inspect, wait on, or close?

A compact row could prioritize:

• status
• role or nickname
• task prompt/title, truncated to fit
• effective model, and provider if relevant
• recent activity or elapsed time

The session/thread ID could still be available in a detail view, copy action, tooltip, or expanded row, but it should not consume primary list space if task/model metadata is available.

Additional information

When several subagents are running, users need to make quick routing decisions from the agent list. Session IDs are hard to map back to intent, while the original task and model immediately explain why each subagent exists and what resources it is using.

This is especially useful when different subagents are assigned different roles or models, for example a fast model for exploration and a stronger model for review.

Related issues:

• https://github.com/openai/codex/issues/22321 tracks the broader TUI Agent View.
• https://github.com/openai/codex/issues/22099 discusses broader background task/subagent management and includes task-prompt visibility in a separate panel concept.
• https://github.com/openai/codex/issues/17312 tracks provider/model visibility for subagents in the desktop app.

This request is narrower: make the /agents list itself prioritize subagent task and effective model metadata over session ID.