Agent Team: teammate tab output isn't scrollable — content that scrolls off screen is permanently lost

Agent Team: teammate tab output isn't scrollable — content that scrolls off screen is permanently lost

What happened?

While using the experimental Agent Team feature, I switched to a teammate's own tab to review its output. Once that teammate produced more output than fits on one screen, I had no way to scroll back to see the earlier part of it — Up arrow, Page Up/Page Down, and the mouse wheel all had no effect while that tab was focused.

This isn't just "off-screen" — the content is gone. The interactive UI takes over the whole terminal screen in this mode, so there's no terminal-native scrollback to fall back on either: once a teammate's output scrolls past the visible area, it can't be retrieved by any means.

For comparison, the main conversation view does not have this problem: Page Up/Page Down scrolls back through earlier history there, with a scrollbar indicator, for the exact same volume of output.

What did you expect to happen?

I expected to be able to scroll back within a teammate's tab to review its earlier output, the same way scrolling already works in the main conversation view.

Client information

Version 0.21.10 (source checkout, commit 78f7926962), macOS (Darwin 25.6.0, arm64).

Login information

Not applicable — this is a UI/rendering issue unrelated to authentication.

Anything else we need to know?

Observed sequence:

1. Enable Agent Team (experimental.agentTeam: true in settings.json, or QWEN_CODE_ENABLE_AGENT_TEAM=1).
2. Start an interactive session, create a team, and add a teammate.
3. Have the teammate produce more output than fits on one screen (e.g. ask it to run a command with long output).
4. Switch to that teammate's tab (Down arrow focuses the tab bar, then Left/Right selects a tab).
5. Try Up arrow, Page Up, or the mouse wheel to scroll back — nothing happens, and the earlier output cannot be recovered.

Separately, while reproducing this, I noticed the always-on roster panel that lists running agents above the input box has some related but distinct gaps — Agent Team teammates don't show up in it at all, and its own overflow indicator can't be scrolled or paged either (there's a separate dialog that works as a full-list fallback). I'm leaving those out of this report since they're a different failure mode than "can't scroll," but happy to file them separately if that's useful.