trigger auditor (post-runner-fix)

- Change const todos to let for mutability
- Add express.json() middleware for body parsing
- Add nextId counter starting at 4 (after seed data)
- POST /todos: accepts {title}, returns 201 with {id, title, done:false}
- DELETE /todos/🆔 returns 204 on success, 404 if not found

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

index.js

@@ -3,12 +3,16 @@ const express = require('express');
 const app = express();
 const PORT = 3000;
 
-const todos = [
+app.use(express.json());
+
+let todos = [
   { id: 1, title: 'Buy groceries', done: false },
   { id: 2, title: 'Walk the dog', done: true },
   { id: 3, title: 'Read a book', done: false },
 ];
 
+let nextId = 4;
+
 app.get('/healthz', (req, res) => {
   res.json({ ok: true });
 });
@@ -17,6 +21,23 @@ app.get('/todos', (req, res) => {
   res.json(todos);
 });
 
+app.post('/todos', (req, res) => {
+  const { title } = req.body;
+  const todo = { id: nextId++, title, done: false };
+  todos.push(todo);
+  res.status(201).json(todo);
+});
+
+app.delete('/todos/:id', (req, res) => {
+  const id = parseInt(req.params.id, 10);
+  const index = todos.findIndex(t => t.id === id);
+  if (index === -1) {
+    return res.status(404).end();
+  }
+  todos.splice(index, 1);
+  res.status(204).end();
+});
+
 app.listen(PORT, () => {
   console.log(`Server listening on http://localhost:${PORT}`);
 });