[fazxes]

Summary

• /agents lists the open fx instances in the footer, one per line with its number, session title, agent profile, and what it is doing: working, needs approval, has a question, finished, or idle. Up, Down, and Enter show one, and Esc closes the list.
• Alt+Up opens the same list while more than one instance is open and the draft has at most one line.
• While a subagent's screen is shown, (on screen) marks the instance whose tree holds it.
• The list and the /status and /permissions panels replace each other, like other footer menus, so Alt+Up over an open panel shows the list.
• When an instance that isn't on screen finishes a turn, the footer names it until it is shown.

From a run against the test model server with two instances, after fx 2 finished a turn while fx 1 was on screen, the footer reads:

fx 1/2 · auto · gpt-5                                    fx 2 finished · Alt+→

and Alt+Up lists:

  fx 1 (on screen) · HOST_A Fix the login bug · main · idle
  fx 2 · HOST_S slow work · main · finished

Changes to existing behavior

• Alt+Up moves up a paragraph as before with one instance open, and in a draft of several lines with any number open. Only with more than one instance open and a draft of at most one line does it open the list instead.

The waiting note and the list name an instance's state with the same words, and both count a turn as going by the same rule.

Stacked on #1438.

Docs

vercel-labs/fx-web#219, stacked on vercel-labs/fx-web#214.