diff --git a/agent/conversation_compression.py b/agent/conversation_compression.py
index 0cf9d364c24..4c06cd6adca 100644
--- a/agent/conversation_compression.py
+++ b/agent/conversation_compression.py
@@ -1074,7 +1074,7 @@ def _compress_context_via_codex_app_server(
             pass
         agent._codex_session = None
 
-    if getattr(result, "error", None):
+    if getattr(result, "interrupted", False) or getattr(result, "error", None):
         try:
             agent._emit_warning(
                 f"⚠ Codex app-server compaction failed: {result.error}"
diff --git a/agent/transports/codex_app_server_session.py b/agent/transports/codex_app_server_session.py
index 78af728711d..e7600f3be0d 100644
--- a/agent/transports/codex_app_server_session.py
+++ b/agent/transports/codex_app_server_session.py
@@ -755,22 +755,22 @@ class CodexAppServerSession:
                 turn_obj = (note.get("params") or {}).get("turn") or {}
                 result.turn_id = turn_obj.get("id") or result.turn_id
                 turn_status = turn_obj.get("status")
-                if turn_status and turn_status not in {"completed", "interrupted"}:
+                if turn_status == "interrupted":
+                    result.interrupted = True
+                    result.error = result.error or "compact turn interrupted"
+                elif turn_status and turn_status != "completed":
                     err_obj = turn_obj.get("error")
-                    if err_obj:
-                        err_msg = _format_responses_error(err_obj, str(turn_status))
-                        stderr_blob = "\n".join(
-                            self._client.stderr_tail(40)
+                    err_msg = _format_responses_error(err_obj, str(turn_status))
+                    stderr_blob = "\n".join(self._client.stderr_tail(40))
+                    hint = _classify_oauth_failure(err_msg, stderr_blob)
+                    if hint is not None:
+                        result.error = hint
+                        result.should_retire = True
+                    else:
+                        result.error = self._format_error_with_stderr(
+                            f"compact turn ended status={turn_status}",
+                            err_msg,
                         )
-                        hint = _classify_oauth_failure(err_msg, stderr_blob)
-                        if hint is not None:
-                            result.error = hint
-                            result.should_retire = True
-                        else:
-                            result.error = self._format_error_with_stderr(
-                                f"compact turn ended status={turn_status}",
-                                err_msg,
-                            )
 
         if not turn_complete and not result.interrupted:
             self._issue_interrupt(result.turn_id)
diff --git a/tests/agent/transports/test_codex_app_server_session.py b/tests/agent/transports/test_codex_app_server_session.py
index adc3470131e..6c620ec5951 100644
--- a/tests/agent/transports/test_codex_app_server_session.py
+++ b/tests/agent/transports/test_codex_app_server_session.py
@@ -528,6 +528,24 @@ class TestCompactThread:
         assert r.token_usage_last["totalTokens"] == 12
         assert r.model_context_window == 200000
 
+    def test_compact_thread_interrupted_returns_non_success(self):
+        client = FakeClient()
+        client.queue_notification(
+            "turn/started",
+            threadId="thread-fake-001",
+            turn={"id": "compact-turn-1"},
+        )
+        client.queue_notification(
+            "turn/completed",
+            threadId="thread-fake-001",
+            turn={"id": "compact-turn-1", "status": "interrupted", "error": None},
+        )
+
+        result = make_session(client).compact_thread(turn_timeout=2.0)
+
+        assert result.interrupted is True
+        assert result.error == "compact turn interrupted"
+
     def test_compact_thread_failure_returns_error(self):
         client = FakeClient()
         from agent.transports.codex_app_server import CodexAppServerError