diff --git a/apps/api/src/services/awooop_ansible_check_mode_service.py b/apps/api/src/services/awooop_ansible_check_mode_service.py
index 0b20c0255..6abba3277 100644
--- a/apps/api/src/services/awooop_ansible_check_mode_service.py
+++ b/apps/api/src/services/awooop_ansible_check_mode_service.py
@@ -2460,10 +2460,20 @@ async def _record_incident_terminal_disposition(
                     UPDATE incidents
                     SET status = CAST(:incident_status AS incidentstatus),
                         outcome = CAST(
-                            coalesce(CAST(outcome AS jsonb), '{}'::jsonb)
-                            || jsonb_build_object(
-                                'automation_terminal',
-                                CAST(:terminal_payload AS jsonb)
+                            jsonb_set(
+                                CASE
+                                    WHEN outcome IS NULL THEN '{}'::jsonb
+                                    WHEN jsonb_typeof(CAST(outcome AS jsonb))
+                                            = 'object'
+                                    THEN CAST(outcome AS jsonb)
+                                    ELSE jsonb_build_object(
+                                        'legacy_outcome',
+                                        CAST(outcome AS jsonb)
+                                    )
+                                END,
+                                '{automation_terminal}',
+                                CAST(:terminal_payload AS jsonb),
+                                true
                             )
                             AS json
                         ),
diff --git a/apps/api/tests/test_ansible_verified_closure.py b/apps/api/tests/test_ansible_verified_closure.py
index 316d688ed..9148dd317 100644
--- a/apps/api/tests/test_ansible_verified_closure.py
+++ b/apps/api/tests/test_ansible_verified_closure.py
@@ -1,5 +1,6 @@
 from __future__ import annotations
 
+import inspect
 from unittest.mock import AsyncMock
 
 import pytest
@@ -56,6 +57,15 @@ def test_runtime_stage_ids_only_accepts_durable_receipts() -> None:
     assert stage_ids == {"mcp_context"}
 
 
+def test_incident_terminal_writer_normalizes_legacy_non_object_outcome() -> None:
+    source = inspect.getsource(service._record_incident_terminal_disposition)
+
+    assert "jsonb_typeof(CAST(outcome AS jsonb))" in source
+    assert "jsonb_set(" in source
+    assert "'legacy_outcome'" in source
+    assert "'{automation_terminal}'" in source
+
+
 @pytest.mark.asyncio
 async def test_closure_refuses_to_resolve_when_any_receipt_is_missing(
     monkeypatch: pytest.MonkeyPatch,