diff --git a/src/gui_2.py b/src/gui_2.py
index 7925c4db..c011b3dc 100644
--- a/src/gui_2.py
+++ b/src/gui_2.py
@@ -4051,13 +4051,15 @@ def render_ast_inspector_modal(app: App) -> None:
       tags = app.controller.project.get("context_tags", ["auto-ast", "bug", "feature", "important"])
       for idx, slc in enumerate(f_item.custom_slices):
        imgui.push_id(f"slc_row_{idx}"); imgui.text(f"#{idx+1}: L{slc['start_line']}-{slc['end_line']}"); imgui.same_line()
-       current_tag = slc.get('tag', '')
+       from src.type_aliases import CustomSlice as _CS
+       cs = _CS.from_dict(slc) if isinstance(slc, dict) else slc
+       current_tag = cs.tag
        if current_tag not in tags and current_tag: tags.append(current_tag)
        tag_idx = tags.index(current_tag) if current_tag in tags else 0
        imgui.set_next_item_width(100)
        ch_tag, new_tag_idx = imgui.combo("##Tag", tag_idx, tags)
        if ch_tag: slc['tag'] = tags[new_tag_idx]
-       imgui.same_line(); imgui.set_next_item_width(-30); changed_comm, new_comm = imgui.input_text("##Note", slc.get('comment', ''))
+       imgui.same_line(); imgui.set_next_item_width(-30); changed_comm, new_comm = imgui.input_text("##Note", cs.comment)
        if changed_comm: slc['comment'] = new_comm
        imgui.same_line()
        if imgui.button("X"): to_remove = idx
@@ -4093,8 +4095,9 @@ def render_ast_inspector_modal(app: App) -> None:
         
         # 2. Slice Highlight
         if hasattr(f_item, 'custom_slices'):
-         is_auto = any(slc['start_line'] <= line_num <= slc['end_line'] for slc in f_item.custom_slices if slc.get('tag') == 'auto-ast')
-         is_man  = any(slc['start_line'] <= line_num <= slc['end_line'] for slc in f_item.custom_slices if slc.get('tag') != 'auto-ast')
+         from src.type_aliases import CustomSlice as _CS
+         is_auto = any(_CS.from_dict(slc).start_line <= line_num <= _CS.from_dict(slc).end_line for slc in f_item.custom_slices if _CS.from_dict(slc).tag == 'auto-ast')
+         is_man  = any(_CS.from_dict(slc).start_line <= line_num <= _CS.from_dict(slc).end_line for slc in f_item.custom_slices if _CS.from_dict(slc).tag != 'auto-ast')
          if is_man: draw_list.add_rect_filled(pos, imgui.ImVec2(pos.x + avail_width, pos.y + line_height), imgui.get_color_u32(theme.get_color("slice_manual", alpha=0.2)))
          elif is_auto and mode == 'hide': draw_list.add_rect_filled(pos, imgui.ImVec2(pos.x + avail_width, pos.y + line_height), imgui.get_color_u32(theme.get_color("slice_auto", alpha=0.1)))
         
@@ -5955,13 +5958,15 @@ def render_text_viewer_window(app: App) -> None:
    tags = app.controller.project.get("context_tags", ["auto-ast", "bug", "feature", "important"])
    for idx, slc in enumerate(app.ui_editing_slices_file.custom_slices):
     imgui.push_id(f"slc_row_{idx}"); imgui.text(f"Slice {idx+1}: {slc['start_line']}-{slc['end_line']}"); imgui.same_line()
-    current_tag = slc.get('tag', '')
+    from src.type_aliases import CustomSlice as _CS2
+    cs = _CS2.from_dict(slc) if isinstance(slc, dict) else slc
+    current_tag = cs.tag
     if current_tag not in tags and current_tag: tags.append(current_tag)
     tag_idx = tags.index(current_tag) if current_tag in tags else 0
     imgui.set_next_item_width(100)
     ch_tag, new_tag_idx = imgui.combo("##Tag", tag_idx, tags)
     if ch_tag: slc['tag'] = tags[new_tag_idx]
-    imgui.same_line(); imgui.set_next_item_width(-30); changed_comm, new_comm = imgui.input_text("##Note", slc.get('comment', ''))
+    imgui.same_line(); imgui.set_next_item_width(-30); changed_comm, new_comm = imgui.input_text("##Note", cs.comment)
     if changed_comm: slc['comment'] = new_comm
     imgui.same_line()
     if imgui.button("X"): to_remove = idx
@@ -5982,8 +5987,9 @@ def render_text_viewer_window(app: App) -> None:
     for i, line_text in enumerate(lines):
      line_num = i + 1; pos = imgui.get_cursor_screen_pos(); line_height = imgui.get_text_line_height()
      
-     is_auto_sliced   = any(slc['start_line'] <= line_num <= slc['end_line'] for slc in app.ui_editing_slices_file.custom_slices if slc.get('tag') == 'auto-ast')
-     is_manual_sliced = any(slc['start_line'] <= line_num <= slc['end_line'] for slc in app.ui_editing_slices_file.custom_slices if slc.get('tag') != 'auto-ast')
+     from src.type_aliases import CustomSlice as _CS3
+     is_auto_sliced   = any(_CS3.from_dict(slc).start_line <= line_num <= _CS3.from_dict(slc).end_line for slc in app.ui_editing_slices_file.custom_slices if _CS3.from_dict(slc).tag == 'auto-ast')
+     is_manual_sliced = any(_CS3.from_dict(slc).start_line <= line_num <= _CS3.from_dict(slc).end_line for slc in app.ui_editing_slices_file.custom_slices if _CS3.from_dict(slc).tag != 'auto-ast')
      
      if is_manual_sliced: draw_list.add_rect_filled(pos, imgui.ImVec2(pos.x + imgui.get_content_region_avail().x, pos.y + line_height), imgui.get_color_u32(theme.get_color("slice_manual", alpha=0.2)))
      elif is_auto_sliced: draw_list.add_rect_filled(pos, imgui.ImVec2(pos.x + imgui.get_content_region_avail().x, pos.y + line_height), imgui.get_color_u32(theme.get_color("slice_auto", alpha=0.15)))