Codex macOS app: Overview subagent count only reconciles after opening the Subagents panel

What version of the Codex App are you using?

Codex/ChatGPT macOS app 26.707.51957 (bundle 5175), bundled codex-cli 0.144.0-alpha.4.

What subscription do you have?

Not relevant to this UI state issue.

What platform is your computer?

macOS 26.5.1 (build 25F80), Apple Silicon (arm64).

What issue are you seeing?

The subagent count shown in the task's Overview tab becomes stale and monotonically increases as subagents are created.

When subagents finish, the Overview count does not reconcile automatically. It only begins accounting for finished subagents after opening the Subagents panel in the side pane and waiting for that panel to update.

This makes the Overview appear to report more active subagents than actually remain and suggests that its count is driven by stale/cumulative state until the side panel triggers a refresh.

What steps can reproduce the bug?

1. Open a task in the Codex macOS app.
2. Have the task create one or more subagents.
3. Let those subagents finish while remaining on the Overview tab.
4. Observe that the subagent count does not decrease/reconcile and continues to grow as more subagents are created.
5. Open the Subagents panel in the side pane.
6. Wait for the panel to refresh.
7. Return to or observe the Overview count; it now accounts for the finished subagents.

What is the expected behavior?

The Overview subagent count should stay synchronized with subagent lifecycle state without requiring the Subagents panel to be opened. Finished subagents should be reflected promptly, and the displayed active count should not increase monotonically across completed subagent runs.

Additional information

Opening the Subagents side panel and waiting for it to update is a temporary workaround. This behavior suggests the Overview count is not subscribed to lifecycle updates, or that the refresh/reconciliation logic currently runs only when the Subagents panel mounts.