Hono review

import { Hono } from "hono";
import { serve } from "@hono/node-server";
import { zValidator } from "@hono/zod-validator";
import { z } from "zod";

// 100 items kept in memory, so the test measures the framework, not a database.
const items = new Map();
for (let i = 1; i <= 100; i++) items.set(i, { id: i, name: `Item ${i}`, price: i * 1.5, tags: ["sample"] });
let nextId = 101;
const Item = z.object({ name: z.string().min(1).max(100), price: z.number().min(0), tags: z.array(z.string()).max(10).optional() });

const app = new Hono();

app.get("/health", (c) => c.json({ status: "ok" }));

app.get("/items/:id", (c) => {
  const item = items.get(Number(c.req.param("id")));
  if (!item) return c.json({ error: "Not found" }, 404);
  return c.json(item);
});

app.post("/items", zValidator("json", Item), (c) => {
  const item = { id: nextId++, ...c.req.valid("json") };
  items.set(item.id, item);
  return c.json(item, 201);
});

serve({ fetch: app.fetch, port: Number(process.env.PORT ?? 3000), hostname: "127.0.0.1" });