diff --git a/src/lib/components/TaskItem.svelte b/src/lib/components/TaskItem.svelte
index 54842b1..2f779a0 100644
--- a/src/lib/components/TaskItem.svelte
+++ b/src/lib/components/TaskItem.svelte
@@ -61,14 +61,10 @@
       ui.openDetails(task.id, { x: r.left + 12, y: r.bottom }, item.day);
     }
   }
-  // Checkbox toggle. Holding Shift and clicking a second checkbox sets every
-  // task between the last-toggled one and this one (in the column's order) to
-  // this one's new state — the familiar select-all-between gesture.
+  // Checkbox toggle.
   function onCheck(e: MouseEvent) {
     haptics.tap();
-    if (e.shiftKey && ui.lastToggled) store.toggleRange(ui.lastToggled, item);
-    else store.toggleDone(item);
-    ui.lastToggled = item.id;
+    store.toggleDone(item);
     // Move keyboard focus onto the checkbox itself. Buttons don't take focus on
     // click in Safari/Firefox, so after checking a task the caret is often still
     // in the add/edit field — and ⌘Z would hit that field's native text-undo
diff --git a/src/lib/store/tasks.svelte.ts b/src/lib/store/tasks.svelte.ts
index 7046882..bed1ac2 100644
--- a/src/lib/store/tasks.svelte.ts
+++ b/src/lib/store/tasks.svelte.ts
@@ -421,22 +421,6 @@ class TaskStore {
     }
   }
 
-  /** Force a cell's done state to an explicit value (handles recurring
-      occurrences the same way `toggleDone` does). A no-op if already there. */
-  async setDone(dt: DayTask, value: boolean) {
-    const t = dt.task;
-    if (dt.virtual && dt.day) {
-      if (dt.done === value) return;
-      await this.setOcc(t.id, dt.day, { completed: value });
-    } else {
-      if (t.done === value) return;
-      const patch: Partial<Task> = value && t.day === null
-        ? { done: value, day: todayKey(), order: this.nextOrder(todayKey()) }
-        : { done: value };
-      await this.patch(t.id, patch);
-    }
-  }
-
   /** Upsert (or clear) the occurrence override for one day of a series. Merges
       `changes` over the current state; when the result is the series default
       (not done, not skipped) the record is dropped entirely, keeping
@@ -489,23 +473,6 @@ class TaskStore {
     });
   }
 
-  /** Shift-click range toggle: set every cell between the `anchorId` cell and
-      `dt` — in the day's visual order, inclusive — to the state this click
-      applies (`dt`'s flipped done). Falls back to a plain toggle when the anchor
-      isn't among `dt`'s day (e.g. it was clicked in another column, or removed).
-      Runs as one undoable step. */
-  async toggleRange(anchorId: string, dt: DayTask) {
-    const items = this.forDay(dt.day);
-    const from = items.findIndex((c) => c.id === anchorId);
-    const to = items.findIndex((c) => c.id === dt.id);
-    if (from < 0 || to < 0) return this.toggleDone(dt);
-    const value = !dt.done;
-    const [lo, hi] = from < to ? [from, to] : [to, from];
-    return this.record(async () => {
-      for (let i = lo; i <= hi; i++) await this.setDone(items[i], value);
-    });
-  }
-
   async setColor(id: string, color: TaskColor) {
     await this.patch(id, { color });
   }
diff --git a/src/lib/store/ui.svelte.ts b/src/lib/store/ui.svelte.ts
index 8fcc072..077fa95 100644
--- a/src/lib/store/ui.svelte.ts
+++ b/src/lib/store/ui.svelte.ts
@@ -10,9 +10,6 @@ class UiStore {
   anchorKey = $state<string>(todayKey());
   /** id of the cell currently in inline-edit mode (drag is disabled meanwhile). */
   editingId = $state<string | null>(null);
-  /** The last checkbox toggled, used as the anchor for a shift-click range
-      toggle (select-all-between). Cleared as needed by re-clicking. */
-  lastToggled = $state<string | null>(null);
   /** record id whose details panel is open, or null. */
   detailsId = $state<string | null>(null);
   /** viewport point the details card should float near (where the task was clicked). */