[Bug]: Claude /goal shows complete while a background subagent is still running #16611

Before submitting

• I searched existing issues and did not find a duplicate.
• I included enough detail to reproduce or investigate the problem.

Area

• apps/server

Steps to reproduce

1. On a Claude thread (Orchestrator V2), start a background subagent: the Agent tool with run_in_background: true.
2. While it is still running, send /goal <condition>. Mine was a multi-round review/implement loop.
3. Claude sets the goal ("Goal set: …"), acknowledges it, and ends the turn to wait for the background subagent.

Expected behavior

The goal stays active. Claude Code skips the goal's Stop hook check while a subagent or background shell runs, and checks again on a later turn (https://code.claude.com/docs/en/goal#background-work-defers-evaluation). The goal is still set in Claude.

Actual behavior

The composer goal row shows Goal complete as soon as the turn ends, with only Clear offered. No goal check has run and no work toward the goal has started.

Cause: finalizeActiveTurn in apps/server/src/orchestration-v2/Adapters/ClaudeAdapterV2.ts infers completion from a normal turn end plus an empty background-task roster. The roster only holds local_bash work; subagents are deliberately kept off it, so a running background subagent never blocks the inference.

Impact

Minor bug or occasional failure

Version or commit

0.0.46-nightly.20261006.2735 (includes #15592)

Environment

macOS 27.0, T3 Code Nightly desktop, Claude Code 2.1.292, Claude Opus 5.5

Logs or stack traces

Captured with the Claude Agent SDK against Claude Code 2.1.292 (condensed, ms from start):
40592  system/task_started   task=a59ddc913b6aade35 type=local_agent is_backgrounded=true
42092  assistant             "Waiting for the new subagent's completion notification ..."
42113  result/success        terminal_reason=completed      <- no Stop hook feedback: check skipped
43282  system/task_notification  task=a59ddc913b6aade35 status=completed
43334  system/init           (wake turn)
47091  result/success        terminal_reason=completed      <- no feedback: goal passed

Replaying these frames through the adapter on main marks the goal complete at 42113.

Screenshots, recordings, or supporting files

The composer goal row reads Goal complete while the assistant in the same thread says the background subagent (Opus) is still coding and no review round has started:

Workaround

Ignore the label while background work runs, and don't press Clear: the goal is still active in Claude. Run bare /goal to see Claude's real status.

Fix proposed in #16598.