Claude pane reads working while only its background subagents run (title spinner after end_turn) #2069

What happens

A Claude Code pane whose turn has ended reads working in Ovis while a background subagent it started is still working. The chat shows "Working…" under the finished answer and the composer shows Stop, while the terminal sits at an empty ❯ prompt with only the subagent row running (○ general-purpose … 13m 59s · ↓ 442.4k tokens). It lasts as long as the subagent works, which can be many minutes. The sidebar, the alerts and the pending-message queue go by the same status.

Ovis already has the right state for this: server/background-wait.ts holds a pane at rest whose turn's work still runs as BG. Its comment assumes herdr reads such a pane as at rest — that no longer holds.

Why

Claude Code keeps its busy title spinner (◐/◑) up while a background subagent streams, even after the main turn ended. herdr's claude manifest rule osc_title_working (priority 1100, the highest) reads that title as working. Upstream herdr treats background work as working on purpose (herdrdev/herdr#5004), so the fix belongs here.

Reproduction (macOS, herdr 0.9.5, Claude Code 2.1.311)

1. In a herdr pane run claude, then: Launch one general-purpose agent with run_in_background true; its job is to write five 600-word essays into part1.md … part5.md, one Write call each. Right after launching, end your turn with OK.
2. Sample herdr pane get <pane> every 3 s.

Main transcript: the turn ends with OK (stop_reason: end_turn) at 16:28:13; the next main entry is the subagent's <task-notification> at 16:29:08.

16:28:08 done    | ✳ Background agent sleep test
16:28:11 working | ◐ Background agent sleep test
16:28:14 working | ◑ …            <- main turn already ended
…        working | ◐/◑ …          (every sample)
16:29:12 working | ◑ …
16:29:15 done    | ✳ …            <- the notification turn ends

A subagent that only waits on sleep 240 does not spin the title: herdr reads done and Ovis shows BG as intended. Only a streaming subagent triggers it.

Proposed fix

For a Claude pane, when herdr says working but the session's own transcript says the main turn ended (its last main-chain entry is an assistant end_turn) and the turn's subagents/commands still run (turnRunning > 0 in server/claude-subagents.ts), take the pane as at rest so BackgroundWait holds it as BG. When the transcript shows the main chain moving again (a prompt or a notification turn), herdr's working stands again. A PR for this follows.