diff --git a/scripts/tier2/artifacts/result_migration_small_files_20260617/apply_edit.py b/scripts/tier2/artifacts/result_migration_small_files_20260617/apply_edit.py
new file mode 100644
index 00000000..809a6d85
--- /dev/null
+++ b/scripts/tier2/artifacts/result_migration_small_files_20260617/apply_edit.py
@@ -0,0 +1,9 @@
+with open('src/app_controller.py', 'r', encoding='utf-8') as f:
+    content = f.read()
+old = " def load_context_preset(self, name: str) -> models.ContextPreset:\n  presets = self.context_preset_manager.load_all(self.project)\n  if name not in presets:\n   raise KeyError(f\"Context preset '{name}' not found.\")\n  preset = presets[name]"
+new = " def load_context_preset(self, name: str) -> models.ContextPreset:\n  presets_result = self.context_preset_manager.load_all(self.project)\n  if not presets_result.ok:\n   raise RuntimeError(f\"Failed to load context presets: {presets_result.errors}\")\n  presets = presets_result.data\n  if name not in presets:\n   raise KeyError(f\"Context preset '{name}' not found.\")\n  preset = presets[name]"
+assert old in content, 'old not found'
+content = content.replace(old, new)
+with open('src/app_controller.py', 'w', encoding='utf-8') as f:
+    f.write(content)
+print('Done')
diff --git a/src/app_controller.py b/src/app_controller.py
index 7b7c5c13..8496a9ce 100644
--- a/src/app_controller.py
+++ b/src/app_controller.py
@@ -2977,7 +2977,10 @@ class AppController:
   self._save_active_project()
 
  def load_context_preset(self, name: str) -> models.ContextPreset:
-  presets = self.context_preset_manager.load_all(self.project)
+  presets_result = self.context_preset_manager.load_all(self.project)
+  if not presets_result.ok:
+   raise RuntimeError(f"Failed to load context presets: {presets_result.errors}")
+  presets = presets_result.data
   if name not in presets:
    raise KeyError(f"Context preset '{name}' not found.")
   preset = presets[name]
diff --git a/tests/test_context_presets_manager.py b/tests/test_context_presets_manager.py
index eb06ca36..3e1805e0 100644
--- a/tests/test_context_presets_manager.py
+++ b/tests/test_context_presets_manager.py
@@ -21,7 +21,9 @@ def project_dict():
 
 def test_manager_load_all(project_dict):
  manager = ContextPresetManager()
- presets = manager.load_all(project_dict)
+ result = manager.load_all(project_dict)
+ assert result.ok, f"load_all failed: {result.errors}"
+ presets = result.data
  assert "test_preset" in presets
  assert len(presets["test_preset"].files) == 2
  assert presets["test_preset"].files[0].path == "file1.py"