feat(studio): switch Vercel deployment from MSW to real server mode with Hono serverless functions

- Add api/[...path].ts Vercel serverless catch-all using Hono
- Add api/_kernel.ts server-side kernel singleton
- Extract broker shim to src/lib/create-broker-shim.ts (DRY)
- Update vercel.json to VITE_RUNTIME_MODE=server
- Add hono and @objectstack/hono dependencies
- Update deployment docs

Co-authored-by: hotlong <50353452+hotlong@users.noreply.github.com>

Author: Copilot

apps/studio/CHANGELOG.md

@@ -1,5 +1,17 @@
 # @objectstack/studio
 
+## 3.2.8
+
+### Minor Changes
+
+- Switch Vercel deployment from MSW (browser mock) to real server mode
+  - Add `api/[...path].ts` Vercel serverless catch-all using Hono + `@objectstack/hono`
+  - Add `api/_kernel.ts` server-side kernel singleton with broker shim
+  - Extract broker shim to `src/lib/create-broker-shim.ts` (shared by MSW and server modes)
+  - Update `vercel.json` to set `VITE_RUNTIME_MODE=server` and `VITE_SERVER_URL=""`
+  - Add `hono` and `@objectstack/hono` dependencies
+  - Update deployment documentation
+
 ## 3.2.7
 
 ### Patch Changes

apps/studio/api/[...path].ts

@@ -0,0 +1,30 @@
+// Copyright (c) 2025 ObjectStack. Licensed under the Apache-2.0 license.
+
+/**
+ * Vercel Serverless Catch-All Route
+ *
+ * Handles all /api/* requests using the ObjectStack Hono application.
+ * The Hono app provides discovery, data CRUD, metadata, auth, and more
+ * endpoints under the /api/v1 prefix.
+ *
+ * File name convention: Vercel maps `[...path].ts` to a catch-all route
+ * that matches /api and any sub-paths (/api/v1/data/task, etc.).
+ */
+
+import { Hono } from 'hono';
+import { handle } from 'hono/vercel';
+import { getApp } from './_kernel';
+
+/**
+ * Outer Hono app — synchronously created so it can be wrapped by handle().
+ * Delegates all requests to the lazy-initialized inner app (which boots
+ * the ObjectStack kernel on first invocation).
+ */
+const app = new Hono();
+
+app.all('/*', async (c) => {
+    const inner = await getApp();
+    return inner.fetch(c.req.raw);
+});
+
+export default handle(app);

apps/studio/api/_kernel.ts

@@ -0,0 +1,106 @@
+// Copyright (c) 2025 ObjectStack. Licensed under the Apache-2.0 license.
+
+/**
+ * Server-side Kernel Singleton for Vercel Serverless Functions
+ *
+ * Boots an ObjectKernel with ObjectQL + InMemoryDriver, seeds data from
+ * the Studio configuration, and exposes a Hono app via createHonoApp.
+ *
+ * The kernel instance survives across warm invocations of the same
+ * serverless function container, so boot cost is paid only on cold start.
+ *
+ * @module
+ */
+
+import { ObjectKernel, DriverPlugin, AppPlugin } from '@objectstack/runtime';
+import { ObjectQLPlugin } from '@objectstack/objectql';
+import { InMemoryDriver } from '@objectstack/driver-memory';
+import { createHonoApp } from '@objectstack/hono';
+import { Hono } from 'hono';
+import { createBrokerShim } from '../src/lib/create-broker-shim';
+import studioConfig from '../objectstack.config';
+
+// --- Singleton state (persists across warm invocations) ---
+let _kernel: ObjectKernel | null = null;
+let _app: Hono | null = null;
+
+/**
+ * Boot the ObjectStack kernel (one-time cold-start cost).
+ */
+async function bootKernel(): Promise<ObjectKernel> {
+    if (_kernel) return _kernel;
+
+    console.log('[Vercel] Booting ObjectStack Kernel (server mode)...');
+
+    const kernel = new ObjectKernel();
+
+    await kernel.use(new ObjectQLPlugin());
+    await kernel.use(new DriverPlugin(new InMemoryDriver(), 'memory'));
+    await kernel.use(new AppPlugin(studioConfig));
+
+    // Broker shim — bridges HttpDispatcher → ObjectQL engine
+    (kernel as any).broker = createBrokerShim(kernel);
+
+    await kernel.bootstrap();
+
+    // Seed data from config
+    await seedData(kernel, [studioConfig]);
+
+    _kernel = kernel;
+    console.log('[Vercel] Kernel ready.');
+    return kernel;
+}
+
+/**
+ * Seed records defined in app configs into the ObjectQL engine.
+ */
+async function seedData(kernel: ObjectKernel, configs: any[]) {
+    const ql = (kernel as any).context?.getService('objectql');
+    if (!ql) return;
+
+    const RESERVED_NS = new Set(['base', 'system']);
+    const toFQN = (name: string, namespace?: string) => {
+        if (name.includes('__') || !namespace || RESERVED_NS.has(namespace)) return name;
+        return `${namespace}__${name}`;
+    };
+
+    for (const appConfig of configs) {
+        const namespace = (appConfig.manifest || appConfig)?.namespace as string | undefined;
+
+        const seedDatasets: any[] = [];
+        if (Array.isArray(appConfig.data)) {
+            seedDatasets.push(...appConfig.data);
+        }
+        if (appConfig.manifest && Array.isArray(appConfig.manifest.data)) {
+            seedDatasets.push(...appConfig.manifest.data);
+        }
+
+        for (const dataset of seedDatasets) {
+            if (!dataset.records || !dataset.object) continue;
+
+            const objectFQN = toFQN(dataset.object, namespace);
+
+            let existing = await ql.find(objectFQN);
+            if (existing && (existing as any).value) existing = (existing as any).value;
+
+            if (!existing || existing.length === 0) {
+                console.log(`[Vercel] Seeding ${dataset.records.length} records for ${objectFQN}`);
+                for (const record of dataset.records) {
+                    await ql.insert(objectFQN, record);
+                }
+            }
+        }
+    }
+}
+
+/**
+ * Get (or create) the Hono application backed by the ObjectStack kernel.
+ * The prefix `/api/v1` matches the client SDK's default API path.
+ */
+export async function getApp(): Promise<Hono> {
+    if (_app) return _app;
+
+    const kernel = await bootKernel();
+    _app = createHonoApp({ kernel, prefix: '/api/v1' });
+    return _app;
+}

apps/studio/package.json

@@ -20,6 +20,7 @@
     "@objectstack/client": "workspace:*",
     "@objectstack/client-react": "workspace:*",
     "@objectstack/driver-memory": "workspace:*",
+    "@objectstack/hono": "workspace:*",
     "@objectstack/metadata": "workspace:*",
     "@objectstack/objectql": "workspace:*",
     "@objectstack/plugin-msw": "workspace:*",
@@ -56,6 +57,7 @@
     "@vitejs/plugin-react": "^6.0.1",
     "autoprefixer": "^10.4.27",
     "happy-dom": "^20.8.4",
+    "hono": "^4.12.8",
     "msw": "^2.12.13",
     "postcss": "^8.5.8",
     "tailwindcss": "^4.2.1",