feat: add SvelteKit adapter

Add framework adapter for SvelteKit with:
- `getApp()` - get bknd app instance
- `serve()` - request handler for hooks.server.ts

Usage in hooks.server.ts:
```typescript
import { serve } from "bknd/adapter/sveltekit";
import config from "../bknd.config";

const bkndHandler = serve(config);

export const handle = async ({ event, resolve }) => {
  if (event.url.pathname.startsWith("/api/")) {
    return bkndHandler(event);
  }
  return resolve(event);
};
```

Includes:
- Adapter implementation (app/src/adapter/sveltekit/)
- Test suite
- Working example (examples/sveltekit/)
- Package exports and types

app/build.ts

@@ -308,6 +308,11 @@ async function buildAdapters() {
          platform: "node",
       }),
 
+      tsup.build({
+         ...baseConfig("sveltekit"),
+         platform: "node",
+      }),
+
       tsup.build({
          ...baseConfig("node"),
          platform: "node",

app/package.json

@@ -253,6 +253,11 @@
       "import": "./dist/adapter/astro/index.js",
       "require": "./dist/adapter/astro/index.js"
     },
+    "./adapter/sveltekit": {
+      "types": "./dist/types/adapter/sveltekit/index.d.ts",
+      "import": "./dist/adapter/sveltekit/index.js",
+      "require": "./dist/adapter/sveltekit/index.js"
+    },
     "./adapter/aws": {
       "types": "./dist/types/adapter/aws/index.d.ts",
       "import": "./dist/adapter/aws/index.js",
@@ -280,6 +285,7 @@
       "adapter/react-router": ["./dist/types/adapter/react-router/index.d.ts"],
       "adapter/bun": ["./dist/types/adapter/bun/index.d.ts"],
       "adapter/node": ["./dist/types/adapter/node/index.d.ts"],
+      "adapter/sveltekit": ["./dist/types/adapter/sveltekit/index.d.ts"],
       "adapter/sqlite": ["./dist/types/adapter/sqlite/edge.d.ts"]
     }
   },
@@ -309,6 +315,8 @@
     "remix",
     "react-router",
     "astro",
+    "sveltekit",
+    "svelte",
     "bun",
     "node"
   ]

app/src/adapter/sveltekit/index.ts

@@ -0,0 +1 @@
+export * from "./sveltekit.adapter";

app/src/adapter/sveltekit/sveltekit.adapter.spec.ts

@@ -0,0 +1,15 @@
+import { afterAll, beforeAll, describe } from "bun:test";
+import * as sveltekit from "./sveltekit.adapter";
+import { disableConsoleLog, enableConsoleLog } from "core/utils";
+import { adapterTestSuite } from "adapter/adapter-test-suite";
+import { bunTestRunner } from "adapter/bun/test";
+
+beforeAll(disableConsoleLog);
+afterAll(enableConsoleLog);
+
+describe("sveltekit adapter", () => {
+   adapterTestSuite(bunTestRunner, {
+      makeApp: sveltekit.getApp,
+      makeHandler: (c, a) => (request: Request) => sveltekit.serve(c, a)({ request }),
+   });
+});

app/src/adapter/sveltekit/sveltekit.adapter.ts

@@ -0,0 +1,23 @@
+import { type FrameworkBkndConfig, createFrameworkApp } from "bknd/adapter";
+
+type SvelteKitEnv = NodeJS.ProcessEnv;
+type TSvelteKit = {
+   request: Request;
+};
+export type SvelteKitBkndConfig<Env = SvelteKitEnv> = FrameworkBkndConfig<Env>;
+
+export async function getApp<Env = SvelteKitEnv>(
+   config: SvelteKitBkndConfig<Env> = {},
+   args: Env = process.env as Env,
+) {
+   return await createFrameworkApp(config, args);
+}
+
+export function serve<Env = SvelteKitEnv>(
+   config: SvelteKitBkndConfig<Env> = {},
+   args: Env = process.env as Env,
+) {
+   return async (fnArgs: TSvelteKit) => {
+      return (await getApp(config, args)).fetch(fnArgs.request);
+   };
+}

examples/sveltekit/.gitignore

@@ -0,0 +1,11 @@
+.DS_Store
+node_modules
+/build
+/.svelte-kit
+/package
+.env
+.env.*
+!.env.example
+vite.config.js.timestamp-*
+vite.config.ts.timestamp-*
+*.db

examples/sveltekit/README.md

@@ -0,0 +1,26 @@
+# bknd + SvelteKit Example
+
+This example shows how to integrate bknd with SvelteKit.
+
+## Setup
+
+```bash
+bun install
+bun run dev
+```
+
+## How it works
+
+1. **`bknd.config.ts`** - bknd configuration with database connection, schema, and seed data
+2. **`src/hooks.server.ts`** - Routes `/api/*` requests to bknd
+3. **`src/routes/+page.server.ts`** - Uses `getApp()` to fetch data server-side
+
+## API Endpoints
+
+- `GET /api/data/entity/todos` - List todos (requires auth)
+- `POST /api/auth/password/login` - Login
+
+## Test Credentials
+
+- Email: `admin@example.com`
+- Password: `password`

examples/sveltekit/bknd.config.ts

@@ -0,0 +1,52 @@
+import type { SvelteKitBkndConfig } from "bknd/adapter/sveltekit";
+import { em, entity, text, libsql } from "bknd";
+import { createClient } from "@libsql/client";
+
+const schema = em({
+  todos: entity("todos", {
+    title: text().required(),
+    done: text(),
+  }),
+});
+
+export default {
+  connection: libsql(
+    createClient({
+      url: "file:data.db",
+    })
+  ),
+  config: {
+    data: schema.toJSON(),
+    auth: {
+      enabled: true,
+      allow_register: true,
+      jwt: {
+        issuer: "bknd-sveltekit-example",
+        secret: "dev-secret-change-in-production-1234567890abcdef",
+      },
+      roles: {
+        admin: {
+          implicit_allow: true,
+        },
+        default: {
+          permissions: ["data.entity.read", "data.entity.create"],
+          is_default: true,
+        },
+      },
+    },
+  },
+  options: {
+    seed: async (ctx) => {
+      await ctx.app.module.auth.createUser({
+        email: "admin@example.com",
+        password: "password",
+        role: "admin",
+      });
+
+      await ctx.em.mutator("todos").insertMany([
+        { title: "Learn bknd", done: "true" },
+        { title: "Build with SvelteKit", done: "false" },
+      ]);
+    },
+  },
+} as const satisfies SvelteKitBkndConfig;

examples/sveltekit/package.json

@@ -0,0 +1,23 @@
+{
+  "name": "bknd-sveltekit-example",
+  "version": "0.0.1",
+  "private": true,
+  "scripts": {
+    "dev": "vite dev",
+    "build": "vite build",
+    "preview": "vite preview"
+  },
+  "devDependencies": {
+    "@sveltejs/adapter-auto": "^7.0.0",
+    "@sveltejs/kit": "^2.0.0",
+    "@sveltejs/vite-plugin-svelte": "^6.0.0",
+    "svelte": "^5.0.0",
+    "typescript": "^5.0.0",
+    "vite": "^7.0.0"
+  },
+  "dependencies": {
+    "bknd": "file:../../app",
+    "@libsql/client": "^0.15.0"
+  },
+  "type": "module"
+}

examples/sveltekit/src/app.html

@@ -0,0 +1,12 @@
+<!doctype html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8" />
+    <link rel="icon" href="%sveltekit.assets%/favicon.png" />
+    <meta name="viewport" content="width=device-width, initial-scale=1" />
+    %sveltekit.head%
+  </head>
+  <body data-sveltekit-preload-data="hover">
+    <div style="display: contents">%sveltekit.body%</div>
+  </body>
+</html>

examples/sveltekit/src/hooks.server.ts

@@ -0,0 +1,14 @@
+import type { Handle } from "@sveltejs/kit";
+import { serve } from "bknd/adapter/sveltekit";
+import config from "../bknd.config";
+
+const bkndHandler = serve(config);
+
+export const handle: Handle = async ({ event, resolve }) => {
+  // Handle bknd API requests
+  if (event.url.pathname.startsWith("/api/")) {
+    return bkndHandler(event);
+  }
+
+  return resolve(event);
+};

examples/sveltekit/src/routes/+page.server.ts

@@ -0,0 +1,14 @@
+import type { PageServerLoad } from "./$types";
+import { getApp } from "bknd/adapter/sveltekit";
+import config from "../../bknd.config";
+
+export const load: PageServerLoad = async () => {
+  const app = await getApp(config);
+  const api = app.getApi();
+
+  const todos = await api.data.readMany("todos");
+
+  return {
+    todos: todos.data ?? [],
+  };
+};

examples/sveltekit/src/routes/+page.svelte

@@ -0,0 +1,24 @@
+<script lang="ts">
+  import type { PageData } from "./$types";
+
+  let { data }: { data: PageData } = $props();
+</script>
+
+<h1>bknd + SvelteKit Example</h1>
+
+<h2>Todos</h2>
+<ul>
+  {#each data.todos as todo (todo.id)}
+    <li>{todo.title} - {todo.done === "true" ? "Done" : "Pending"}</li>
+  {/each}
+</ul>
+
+<h2>API Endpoints</h2>
+<ul>
+  <li><a href="/api/data/entity/todos">/api/data/entity/todos</a></li>
+  <li><a href="/api/auth/password/login">/api/auth/password/login</a> (POST)</li>
+</ul>
+
+<p>
+  Login credentials: <code>admin@example.com</code> / <code>password</code>
+</p>

examples/sveltekit/svelte.config.js

@@ -0,0 +1,12 @@
+import adapter from "@sveltejs/adapter-auto";
+import { vitePreprocess } from "@sveltejs/vite-plugin-svelte";
+
+/** @type {import('@sveltejs/kit').Config} */
+const config = {
+  preprocess: vitePreprocess(),
+  kit: {
+    adapter: adapter(),
+  },
+};
+
+export default config;

examples/sveltekit/tsconfig.json

@@ -0,0 +1,14 @@
+{
+  "extends": "./.svelte-kit/tsconfig.json",
+  "compilerOptions": {
+    "allowJs": true,
+    "checkJs": true,
+    "esModuleInterop": true,
+    "forceConsistentCasingInFileNames": true,
+    "resolveJsonModule": true,
+    "skipLibCheck": true,
+    "sourceMap": true,
+    "strict": true,
+    "moduleResolution": "bundler"
+  }
+}

examples/sveltekit/vite.config.ts

@@ -0,0 +1,6 @@
+import { sveltekit } from "@sveltejs/kit/vite";
+import { defineConfig } from "vite";
+
+export default defineConfig({
+  plugins: [sveltekit()],
+});