Fleet view: show live agent activity across channels and mobile

[joelbrilliant]

Motivation

Buzz knows when my agents are working, but I can't see that work in one place.

On desktop, the left rail shows timers. To understand what an agent is doing, I have to return to the originating conversation, hover over the composer activity indicator, then open View activity. With agents working across several channels or DMs, I have to repeat that process for each one.

Mobile is more confusing. The app has an Activity screen and an Activity filter, but these refer to recent channel activity. It can show Activity (0) and "No recent channel activity" while agent work is only available through the desktop's per-conversation activity surface.

"Activity" currently means channel notifications on mobile, published content in Pulse, and live agent execution in the desktop panel. None of those surfaces answers the workspace-level question: what are my agents doing right now?

Proposed solution

Add a workspace-wide agent activity view on desktop and mobile showing:

• Every owned agent currently working
• A concise description of the current action
• The originating channel, DM or thread
• Elapsed time and latest update
• Working, waiting, blocked and failed states
• One-click access to the existing activity log
• One-click navigation back to the source conversation

The first slice can be read-only and reuse the existing observer events, working signals and session panel. It doesn't need new transcript UI, usage analytics or remote lifecycle controls.

I'd also relabel the existing mobile filter as Channel activity so it doesn't imply that it shows agent execution.

Alternatives considered

• Composer activity pills are useful inside one conversation, but require finding every source conversation individually.
• Pulse is currently a publishing and social feed rather than a live operational view.
• The Agents page shows the roster and configuration, but not what each agent is currently doing.
• A separate external dashboard would duplicate data Buzz already receives and weaken the native orchestration experience.

Additional context

No exact open issue was found, but there is strong prior work:

• #3684 implemented an Agent Fleet view with live status, source channels, elapsed time and click-through to the existing activity panel. The author closed the draft shortly after opening it, without review or a maintainer decision.
• #2716 includes another contributor building a fleet view from observer events and presence.
• #2646 implements the current per-conversation composer activity pills.
• #3051 proposes a persistent full-screen live session view.
• #3907 reports the missing agent-observability path on mobile.
• #3996 proposes an at-a-glance Agents surface for remote agents.

Before starting another implementation, would maintainers prefer #3684 to be revived and narrowed, or a fresh first slice against current main?

Mobile screenshot attached showing the current Activity (0) and "No recent channel activity" state.

[joelbrilliant]

[mikececco]

#4537 might be a useful prerequisite for this — a fleet view is only as good as the status it displays, and today that status is a constant.

agents_from_events defaults status to "offline" for any kind:10100 profile without one, and nothing in-tree writes that field, so every relay-discovered agent reports offline regardless of whether it's running. Real presence exists separately (kind:20001, 180s Redis TTL) and was never joined to the agent roster.

#4537 does that join as a pure, unit-tested function (agents/lib/agentPresenceStatus.ts), currently wired into PulseView. Any workspace-wide fleet surface built later can reuse it rather than re-deriving status from local process state.

No overlap with the activity/rendering side of this issue — happy to rebase if it collides with anything in progress.