feat(web): show how many subagents are running at a glance

[t3dotgg]

A thread can have five subagents grinding away and nothing on screen says so once the spawn notices scroll up. You had to open the right panel manually to find out.

Now the right panel toggle wears a small count badge while subagents are running or waiting (same live count the Agents panel footer uses). The tooltip and aria-label say "N agents working". Details:

• The badge hides while the Agents surface is visible, since the roster itself is on screen.
• The Agents card in the panel's empty state carries the same badge, so after opening the panel you can see where the action is.
• Static badge, no animation.

🤖 Generated with Claude Code (Claude Fable 5)

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Note

Low Risk
UI-only badge and accessibility copy on existing panel controls; no backend or agent lifecycle changes.

Overview
Surfaces how many subagents are running or waiting without opening the right panel, using the same agentPanelModel.liveCount as the Agents panel footer.

The right panel toggle in PanelLayoutControls gets a static count badge when liveAgentCount > 0, with tooltip and aria-label text like “N agents working”. In ChatView, that count is forced to 0 while the right panel is open on the Agents surface so the badge does not duplicate the on-screen roster.

When the right panel has no active surface, the Agents card in RightPanelEmptyState shows the same badge so users can see activity after opening the panel.

^{Reviewed by Cursor Bugbot for commit 6974ba2. Bugbot is set up for automated code reviews on this repo. Configure here.}

Note

Show live subagent count as a badge on the right panel toggle and Agents card

• Adds a numeric badge to the right panel toggle in PanelLayoutControls showing the number of running/waiting subagents; the badge is suppressed when the Agents panel is already open.
• Updates RightPanelTabs to display the same count as a badge on the Agents card in the empty-state view.
• Tooltip and aria-label on the toggle also include the live count with singular/plural handling.

^{Macroscope summarized 6974ba2.}

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[github-actions]

Thread transfer impact

✅ Thread transfer remains within every enforced ceiling.

Provider	Metric	Main baseline	This PR	Impact	PR ceiling
Codex	Total thread wire	11.3 KiB	11.3 KiB	−7 B (−0.1%)	15.1 KiB	✅
Codex	Thread snapshot wire	5.5 KiB	5.5 KiB	+6 B (+0.1%)	7.3 KiB	✅
Codex	Live turn WebSocket wire	5.9 KiB	5.9 KiB	−13 B (−0.2%)	7.8 KiB	✅
Codex	Live turn WebSocket decoded	49.7 KiB	49.7 KiB	0 B (0.0%)	66.4 KiB	✅
Codex	Live turn messages	16	16	0 (0.0%)	21	✅
Claude	Total thread wire	11.3 KiB	11.3 KiB	−14 B (−0.1%)	15.1 KiB	✅
Claude	Thread snapshot wire	5.5 KiB	5.5 KiB	+9 B (+0.2%)	7.3 KiB	✅
Claude	Live turn WebSocket wire	5.9 KiB	5.8 KiB	−23 B (−0.4%)	7.8 KiB	✅
Claude	Live turn WebSocket decoded	50.6 KiB	50.6 KiB	0 B (0.0%)	66.4 KiB	✅
Claude	Live turn messages	16	16	0 (0.0%)	21	✅

Baseline: 89ee692 · PR result: 6974ba2 · Source CI: success

Scenario and decoded snapshot size

10 historical turns, 5 command tools per turn, 878.9 KiB retained MCP result per historical turn, and a 1.05 MiB retained result in the measured turn.

• Codex decoded thread snapshot: 94.6 KiB
• Claude decoded thread snapshot: 95.4 KiB

Updated in place by a trusted workflow. PR artifacts are strictly validated and never executed.

[macroscopeapp]

Approvability

Verdict: Approved 6974ba2

Pure UI enhancement that displays an existing live agent count as a badge on panel controls. No new data sources, state changes, or backend modifications—just conditional rendering of visual indicators with proper accessibility labels.

^{You can customize Macroscope's approvability policy. Learn more.}