diff --git a/frontend/src/todos/TodoList.tsx b/frontend/src/todos/TodoList.tsx
new file mode 100644
index 0000000..f836d05
--- /dev/null
+++ b/frontend/src/todos/TodoList.tsx
@@ -0,0 +1,105 @@
+import { useEffect, useState, type FormEvent } from 'react';
+import { api, type Todo } from '../lib/api';
+import { supabase } from '../lib/supabase';
+
+export function TodoList({ userEmail }: { userEmail: string }) {
+  const [todos, setTodos] = useState<Todo[]>([]);
+  const [newTitle, setNewTitle] = useState('');
+  const [error, setError] = useState<string | null>(null);
+  const [loading, setLoading] = useState(true);
+
+  async function refresh() {
+    try {
+      setTodos(await api.list());
+    } catch (e) {
+      setError(String(e));
+    }
+  }
+
+  useEffect(() => {
+    refresh().finally(() => setLoading(false));
+  }, []);
+
+  async function onAdd(e: FormEvent) {
+    e.preventDefault();
+    const title = newTitle.trim();
+    if (!title) return;
+    setError(null);
+    try {
+      const created = await api.create(title);
+      setTodos((prev) => [created, ...prev]);
+      setNewTitle('');
+    } catch (e) {
+      setError(String(e));
+    }
+  }
+
+  async function onToggle(todo: Todo) {
+    setError(null);
+    try {
+      const updated = await api.setCompleted(todo.id, !todo.completed);
+      setTodos((prev) => prev.map((t) => (t.id === updated.id ? updated : t)));
+    } catch (e) {
+      setError(String(e));
+    }
+  }
+
+  async function onDelete(todo: Todo) {
+    setError(null);
+    try {
+      await api.remove(todo.id);
+      setTodos((prev) => prev.filter((t) => t.id !== todo.id));
+    } catch (e) {
+      setError(String(e));
+    }
+  }
+
+  async function onSignOut() {
+    await supabase.auth.signOut();
+  }
+
+  return (
+    <div style={{ maxWidth: 520, margin: '2rem auto', fontFamily: 'sans-serif' }}>
+      <header style={{ display: 'flex', justifyContent: 'space-between', alignItems: 'baseline' }}>
+        <h1>Todos</h1>
+        <span>
+          {userEmail}{' '}
+          <button type="button" onClick={onSignOut}>Sign out</button>
+        </span>
+      </header>
+
+      <form onSubmit={onAdd} style={{ display: 'flex', gap: 8, marginBottom: 16 }}>
+        <input
+          value={newTitle}
+          onChange={(e) => setNewTitle(e.target.value)}
+          placeholder="What needs doing?"
+          maxLength={500}
+          style={{ flex: 1, padding: 6 }}
+        />
+        <button type="submit">Add</button>
+      </form>
+
+      {error && <p style={{ color: 'crimson' }}>{error}</p>}
+      {loading ? (
+        <p>Loading…</p>
+      ) : todos.length === 0 ? (
+        <p>No todos yet.</p>
+      ) : (
+        <ul style={{ listStyle: 'none', padding: 0 }}>
+          {todos.map((t) => (
+            <li
+              key={t.id}
+              style={{ display: 'flex', alignItems: 'center', gap: 8, padding: '4px 0' }}
+            >
+              <input type="checkbox" checked={t.completed} onChange={() => onToggle(t)} />
+              <span style={{ flex: 1, textDecoration: t.completed ? 'line-through' : 'none' }}>
+                {t.title}
+              </span>
+              <button type="button" onClick={() => onDelete(t)}>Delete</button>
+            </li>
+          ))}
+        </ul>
+      )}
+    </div>
+  );
+}