diff --git a/tests/tools/test_kanban_tools.py b/tests/tools/test_kanban_tools.py
index 476d14dd325c..5c851a2f6d36 100644
--- a/tests/tools/test_kanban_tools.py
+++ b/tests/tools/test_kanban_tools.py
@@ -132,6 +132,41 @@ def test_complete_happy_path(worker_env):
         conn.close()
 
 
+def test_complete_reports_durable_scratch_artifact_paths(worker_env):
+    """The transcript-facing tool result must name the surviving attachment.
+
+    Desktop's Artifacts browser indexes tool results. Returning only the
+    original scratch path leaves it indexing a file that completion deletes.
+    """
+    from hermes_cli import kanban_db as kb
+    from tools import kanban_tools as kt
+
+    conn = kb.connect()
+    try:
+        task = kb.get_task(conn, worker_env)
+        assert task is not None
+        workspace = kb.resolve_workspace(task)
+        kb.set_workspace_path(conn, worker_env, workspace)
+    finally:
+        conn.close()
+
+    artifact = workspace / "result.txt"
+    artifact.write_text("survives\n")
+
+    result = json.loads(kt._handle_complete({
+        "summary": "saved result",
+        "artifacts": [str(artifact)],
+    }))
+
+    assert result["ok"] is True
+    assert len(result["artifacts"]) == 1
+    persisted = result["artifacts"][0]
+    assert persisted != str(artifact)
+    assert persisted.endswith(f"/attachments/{worker_env}/result.txt")
+    assert os.path.isfile(persisted)
+    assert not workspace.exists()
+
+
 def test_complete_retry_with_empty_created_cards_succeeds(worker_env):
     """After a phantom rejection, retrying kanban_complete with
     created_cards=[] (the documented escape hatch) must complete the
diff --git a/tools/kanban_tools.py b/tools/kanban_tools.py
index fdf846d7353a..5386eaacac9a 100644
--- a/tools/kanban_tools.py
+++ b/tools/kanban_tools.py
@@ -799,7 +799,20 @@ def _handle_complete(args: dict, **kw) -> str:
                     f"could not complete {tid} (unknown id or already terminal)"
                 )
             run = kb.latest_run(conn, tid)
-            return _ok(task_id=tid, run_id=run.id if run else None)
+            persisted_artifacts: list[str] = []
+            if run is not None and isinstance(run.metadata, dict):
+                raw_artifacts = run.metadata.get("artifacts")
+                if isinstance(raw_artifacts, (list, tuple)):
+                    persisted_artifacts = [
+                        str(path).strip()
+                        for path in raw_artifacts
+                        if str(path).strip()
+                    ]
+            return _ok(
+                task_id=tid,
+                run_id=run.id if run else None,
+                artifacts=persisted_artifacts,
+            )
         finally:
             conn.close()
     except ValueError as e: