Refuse close after lease loss

Assistant: codex
Assistant-Model: gpt-5.6-sol
Assistant-Session: 01a02b6f-7db1-7222-918b-e813a6bda38d

tests/test_claim_loop.py

@@ -3,6 +3,7 @@
 from __future__ import annotations
 
 from unittest.mock import MagicMock, patch
+import time
 
 from rein_aharness.approaches import ApproachResult, APPROACH_FI_RESEARCH_BRIEF
 from rein_aharness.claim_loop import process_one, poll_peek
@@ -105,6 +106,35 @@ def test_process_one_failure_reopens() -> None:
     assert client.fail.call_args.kwargs["reopen"] is True
 
 
+def test_process_one_refuses_close_after_lease_loss() -> None:
+    client = MagicMock(spec=ActivityCoreOpsClient)
+    client.config = OpsRunConfig(worker_id="w", lease_seconds=90)
+    client.claim.return_value = [_claimed_run()]
+    client.heartbeat.side_effect = OpsRunError("lease rejected")
+    ar = ApproachResult(
+        ok=True,
+        approach=APPROACH_FI_RESEARCH_BRIEF,
+        result={"path": "briefs/x.md"},
+        reason="ok",
+    )
+
+    def slow_execute(*_args, **_kwargs):
+        time.sleep(0.05)
+        return ar
+
+    with (
+        patch("rein_aharness.claim_loop._heartbeat_interval", return_value=0.01),
+        patch("rein_aharness.claim_loop.execute_approach", side_effect=slow_execute),
+    ):
+        result = process_one(client)
+
+    assert result.ok is False
+    assert result.reason.startswith("lease lost")
+    assert "lease_loss" in result.detail
+    client.complete.assert_not_called()
+    client.fail.assert_not_called()
+
+
 def test_poll_peek() -> None:
     client = MagicMock(spec=ActivityCoreOpsClient)
     client.list_open.return_value = [_claimed_run()]