diff --git a/using-git-worktrees-to-run-parallel-ai-agents/todo-app/.gitignore b/using-git-worktrees-to-run-parallel-ai-agents/todo-app/.gitignore
new file mode 100644
index 0000000000..ffd07d855e
--- /dev/null
+++ b/using-git-worktrees-to-run-parallel-ai-agents/todo-app/.gitignore
@@ -0,0 +1,7 @@
+# .gitignore
+
+__pycache__/
+*.pyc
+.venv/
+tasks.json
+.claude/worktrees/
\ No newline at end of file
diff --git a/using-git-worktrees-to-run-parallel-ai-agents/todo-app/pyproject.toml b/using-git-worktrees-to-run-parallel-ai-agents/todo-app/pyproject.toml
new file mode 100644
index 0000000000..2ec9b1caf9
--- /dev/null
+++ b/using-git-worktrees-to-run-parallel-ai-agents/todo-app/pyproject.toml
@@ -0,0 +1,15 @@
+# pyproject.toml
+
+[project]
+name = "todo-app"
+version = "0.1.0"
+description = "A minimal terminal to-do app for practicing Git worktrees"
+requires-python = ">=3.10"
+dependencies = ["textual>=8.0"]
+
+[project.scripts]
+todo = "todo_app.app:main"
+
+[build-system]
+requires = ["hatchling"]
+build-backend = "hatchling.build"
\ No newline at end of file
diff --git a/using-git-worktrees-to-run-parallel-ai-agents/todo-app/todo_app/__init__.py b/using-git-worktrees-to-run-parallel-ai-agents/todo-app/todo_app/__init__.py
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/using-git-worktrees-to-run-parallel-ai-agents/todo-app/todo_app/app.py b/using-git-worktrees-to-run-parallel-ai-agents/todo-app/todo_app/app.py
new file mode 100644
index 0000000000..6b6fe50776
--- /dev/null
+++ b/using-git-worktrees-to-run-parallel-ai-agents/todo-app/todo_app/app.py
@@ -0,0 +1,78 @@
+# todo_app/app.py
+
+from textual.app import App, ComposeResult
+from textual.widgets import Footer, Input, Label, ListItem, ListView
+
+from todo_app.storage import load_tasks, save_tasks
+
+
+def build_item(task):
+    marker = "[x]" if task["done"] else "[ ]"
+    item = ListItem(Label(f"{marker} {task['text']}", markup=False))
+    item.set_class(task["done"], "done")
+    return item
+
+
+class TodoApp(App):
+    CSS_PATH = "app.tcss"
+    BINDINGS = [
+        ("space", "toggle", "Toggle"),
+        ("d", "delete", "Delete"),
+        ("q", "quit", "Quit"),
+    ]
+
+    def __init__(self):
+        super().__init__()
+        self.tasks = load_tasks()
+
+    def compose(self) -> ComposeResult:
+        yield Label("todo", id="title")
+        yield Input(placeholder="Add a task, then press Enter", id="new-task")
+        yield ListView(*(build_item(task) for task in self.tasks), id="tasks")
+        yield Footer()
+
+    def on_mount(self) -> None:
+        self.query_one("#tasks", ListView).index = 0
+        self.query_one("#new-task", Input).focus()
+
+    def on_input_submitted(self, event: Input.Submitted) -> None:
+        text = event.value.strip()
+        if not text:
+            return
+        task = {"text": text, "done": False}
+        self.tasks.append(task)
+        list_view = self.query_one("#tasks", ListView)
+        list_view.append(build_item(task))
+        if list_view.index is None:
+            list_view.index = 0
+        event.input.clear()
+        save_tasks(self.tasks)
+
+    def action_toggle(self) -> None:
+        list_view = self.query_one("#tasks", ListView)
+        item = list_view.highlighted_child
+        if item is None:
+            return
+        task = self.tasks[list_view.index]
+        task["done"] = not task["done"]
+        marker = "[x]" if task["done"] else "[ ]"
+        item.query_one(Label).update(f"{marker} {task['text']}")
+        item.set_class(task["done"], "done")
+        save_tasks(self.tasks)
+
+    def action_delete(self) -> None:
+        list_view = self.query_one("#tasks", ListView)
+        index = list_view.index
+        if index is None:
+            return
+        del self.tasks[index]
+        list_view.pop(index)
+        save_tasks(self.tasks)
+
+
+def main():
+    TodoApp().run()
+
+
+if __name__ == "__main__":
+    main()
diff --git a/using-git-worktrees-to-run-parallel-ai-agents/todo-app/todo_app/app.tcss b/using-git-worktrees-to-run-parallel-ai-agents/todo-app/todo_app/app.tcss
new file mode 100644
index 0000000000..3706ea2fd9
--- /dev/null
+++ b/using-git-worktrees-to-run-parallel-ai-agents/todo-app/todo_app/app.tcss
@@ -0,0 +1,40 @@
+/* todo_app/app.tcss */
+
+Screen {
+    background: #1e1e2e;
+    color: #cdd6f4;
+}
+
+#title {
+    width: 100%;
+    height: 1;
+    background: #45475a;
+    color: #f5e0dc;
+    text-style: bold;
+}
+
+#new-task {
+    border: round #6c7086;
+    background: #181825;
+    color: #cdd6f4;
+}
+
+#tasks {
+    height: 1fr;
+    border: round #6c7086;
+    background: #1e1e2e;
+}
+
+#tasks > ListItem {
+    padding: 0 1;
+}
+
+#tasks > ListItem.done {
+    color: #6c7086;
+    text-style: strike;
+}
+
+Footer {
+    background: #45475a;
+    color: #cdd6f4;
+}
\ No newline at end of file
diff --git a/using-git-worktrees-to-run-parallel-ai-agents/todo-app/todo_app/storage.py b/using-git-worktrees-to-run-parallel-ai-agents/todo-app/todo_app/storage.py
new file mode 100644
index 0000000000..b84936046e
--- /dev/null
+++ b/using-git-worktrees-to-run-parallel-ai-agents/todo-app/todo_app/storage.py
@@ -0,0 +1,16 @@
+# todo_app/storage.py
+
+import json
+from pathlib import Path
+
+DATA_FILE = Path("tasks.json")
+
+
+def load_tasks(path=DATA_FILE):
+    if not path.exists():
+        return []
+    return json.loads(path.read_text(encoding="utf-8"))
+
+
+def save_tasks(tasks, path=DATA_FILE):
+    path.write_text(json.dumps(tasks, indent=2), encoding="utf-8")