diff --git a/.github/workflows/github-pages.yml b/.github/workflows/github-pages.yml
index b8c9c09..475af2d 100644
--- a/.github/workflows/github-pages.yml
+++ b/.github/workflows/github-pages.yml
@@ -4,7 +4,7 @@ name: Deploy static content to Pages
 on:
   # Runs on pushes targeting the default branch
   push:
-    branches: ['main']
+    branches: ["main"]
 
   # Allows you to run this workflow manually from the Actions tab
   workflow_dispatch:
@@ -17,7 +17,7 @@ permissions:
 
 # Allow one concurrent deployment
 concurrency:
-  group: 'pages'
+  group: "pages"
   cancel-in-progress: true
 
 jobs:
@@ -34,20 +34,19 @@ jobs:
         uses: actions/setup-node@v4
         with:
           node-version: 20
-          cache: 'npm'
+          cache: "npm"
       - name: Install dependencies
         run: npm ci
       - name: Build
-        run: npm run build
+        run: npm run build:app
       - name: Copy data folder to dist
-        run: cp -r ./data ./dist/data
+        run: cp -r ./data ./dist/app/data
       - name: Setup Pages
         uses: actions/configure-pages@v4
       - name: Upload artifact
         uses: actions/upload-pages-artifact@v3
         with:
-          # Upload dist folder
-          path: './dist'
+          path: "./dist/app"
       - name: Deploy to GitHub Pages
         id: deployment
         uses: actions/deploy-pages@v4
diff --git a/package.json b/package.json
index c6ecab6..14a01ad 100644
--- a/package.json
+++ b/package.json
@@ -5,7 +5,8 @@
   "type": "module",
   "scripts": {
     "dev": "vite",
-    "build": "tsc && vite build",
+    "build:app": "tsc && vite build",
+    "build:lib": "tsc && vite build --mode lib",
     "preview": "vite preview"
   },
   "devDependencies": {
diff --git a/src/gui/lib.ts b/src/gui/lib.ts
new file mode 100644
index 0000000..85e1292
--- /dev/null
+++ b/src/gui/lib.ts
@@ -0,0 +1,4 @@
+import "../../style.css";
+import { setupGui } from "./gui.js";
+
+export { setupGui };
diff --git a/vite.config.js b/vite.config.js
index a2b7fa1..57ab21d 100644
--- a/vite.config.js
+++ b/vite.config.js
@@ -1,8 +1,26 @@
 import { defineConfig } from "vite";
 
-export default defineConfig({
-  base: "",
-  build: {
-    sourcemap: true,
-  },
+export default defineConfig(({ command, mode }) => {
+  if (command === "build" && mode === "lib") {
+    return {
+      build: {
+        lib: {
+          entry: "./src/gui/lib.ts",
+          name: "jellyfish",
+          fileName: (format) => `jellyfish.${format}.js`,
+          formats: ["es", "umd"],
+        },
+        outDir: "dist/lib",
+        cssCodeSplit: true,
+      },
+    };
+  }
+
+  return {
+    base: "",
+    build: {
+      sourcemap: true,
+      outDir: "dist/app",
+    },
+  };
 });