diff --git a/gdn-app/package.json b/gdn-app/package.json
index 0e83337..3e5b211 100644
--- a/gdn-app/package.json
+++ b/gdn-app/package.json
@@ -14,6 +14,7 @@
     "@tailwindcss/vite": "^4.0.0",
     "@tauri-apps/api": "^2.2.0",
     "@tauri-apps/plugin-opener": "^2.2.5",
+    "pinia": "^2.3.1",
     "tailwindcss": "^4.0.0",
     "vue": "^3.5.13"
   },
diff --git a/gdn-app/src/App.vue b/gdn-app/src/App.vue
index fd75922..384c846 100644
--- a/gdn-app/src/App.vue
+++ b/gdn-app/src/App.vue
@@ -1,11 +1,18 @@
 <script setup lang="ts">
 import Navbar from "./components/Navbar.vue";
+import Test from "./components/Test.vue";
+import { useFooStore } from "./stores/foo";
+
+const foo = useFooStore();
 </script>
 
 <template>
   <div class="flex h-screen touch-pan-x touch-pan-y flex-col">
     <Navbar />
     <div class="h-full overflow-auto">
+      <Test />
+      <br />
+      Yes, it's now {{ foo.name }}.
       <template v-for="_ in 6">
         <p class="p-1 font-thin">The quick brown fox Qiii</p>
         <p class="p-1 font-extralight">The quick brown fox Qiii</p>
diff --git a/gdn-app/src/components/Test.vue b/gdn-app/src/components/Test.vue
new file mode 100644
index 0000000..9ed2fd9
--- /dev/null
+++ b/gdn-app/src/components/Test.vue
@@ -0,0 +1,10 @@
+<script setup lang="ts">
+import { useFooStore } from "@/stores/foo";
+
+const foo = useFooStore();
+</script>
+
+<template>
+  Foo is {{ foo.name }}.
+  <button @click="foo.setName('bar')">Change to bar.</button>
+</template>
diff --git a/gdn-app/src/main.ts b/gdn-app/src/main.ts
index b670de8..0474ef1 100644
--- a/gdn-app/src/main.ts
+++ b/gdn-app/src/main.ts
@@ -1,4 +1,5 @@
+import { createPinia } from "pinia";
 import { createApp } from "vue";
 import App from "./App.vue";
 
-createApp(App).mount("#app");
+createApp(App).use(createPinia()).mount("#app");
diff --git a/gdn-app/src/stores/foo.ts b/gdn-app/src/stores/foo.ts
new file mode 100644
index 0000000..392551d
--- /dev/null
+++ b/gdn-app/src/stores/foo.ts
@@ -0,0 +1,12 @@
+import { defineStore } from "pinia";
+import { ref } from "vue";
+
+export const useFooStore = defineStore("foo", () => {
+  const name = ref("foo");
+
+  function setName(to: string) {
+    name.value = to;
+  }
+
+  return { name, setName };
+});
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index d3437b1..db526f9 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -29,6 +29,9 @@ importers:
       '@tauri-apps/plugin-opener':
         specifier: ^2.2.5
         version: 2.2.5
+      pinia:
+        specifier: ^2.3.1
+        version: 2.3.1(typescript@5.7.3)(vue@3.5.13(typescript@5.7.3))
       tailwindcss:
         specifier: ^4.0.0
         version: 4.0.0
@@ -692,6 +695,9 @@ packages:
   '@vue/compiler-vue2@2.7.16':
     resolution: {integrity: sha512-qYC3Psj9S/mfu9uVi5WvNZIzq+xnXMhOwbTFKKDD7b1lhpnn71jXSFdTQ+WsIEk0ONCd7VV2IMm7ONl6tbQ86A==}
 
+  '@vue/devtools-api@6.6.4':
+    resolution: {integrity: sha512-sGhTPMuXqZ1rVOk32RylztWkfXTRhuS7vgAKv0zjqk8gbsHkJ7xfFf+jbySxt7tWObEJwyKaHMikV/WGDiQm8g==}
+
   '@vue/devtools-core@7.7.1':
     resolution: {integrity: sha512-W4CRrSZJodNIfrPO7/dXF6ZS0QyOY6PCYVhpSoTSx9+nh2wpZxcS1482lAdKM0FTlaoApHV6jXT95Me90hSaBA==}
     peerDependencies:
@@ -1060,6 +1066,15 @@ packages:
     resolution: {integrity: sha512-M7BAV6Rlcy5u+m6oPhAPFgJTzAioX/6B0DxyvDlo9l8+T3nLKbrczg2WLUyzd45L8RqfUMyGPzekbMvX2Ldkwg==}
     engines: {node: '>=12'}
 
+  pinia@2.3.1:
+    resolution: {integrity: sha512-khUlZSwt9xXCaTbbxFYBKDc/bWAGWJjOgvxETwkTN7KRm66EeT1ZdZj6i2ceh9sP2Pzqsbc704r2yngBrxBVug==}
+    peerDependencies:
+      typescript: '>=4.4.4'
+      vue: ^2.7.0 || ^3.5.11
+    peerDependenciesMeta:
+      typescript:
+        optional: true
+
   postcss@8.5.1:
     resolution: {integrity: sha512-6oz2beyjc5VMn/KV1pPw8fliQkhBXrVn1Z3TVyqZxU8kZpzEKhBdmCFqI6ZbmGtamQvQGuU1sgPTk8ZrXDD7jQ==}
     engines: {node: ^10 || ^12 || >=14}
@@ -1281,6 +1296,17 @@ packages:
   vscode-uri@3.0.8:
     resolution: {integrity: sha512-AyFQ0EVmsOZOlAnxoFOGOq1SQDWAB7C6aqMGS23svWAllfOaxbuFvcT8D1i8z3Gyn8fraVeZNNmN6e9bxxXkKw==}
 
+  vue-demi@0.14.10:
+    resolution: {integrity: sha512-nMZBOwuzabUO0nLgIcc6rycZEebF6eeUfaiQx9+WSk8e29IbLvPU9feI6tqW4kTo3hvoYAJkMh8n8D0fuISphg==}
+    engines: {node: '>=12'}
+    hasBin: true
+    peerDependencies:
+      '@vue/composition-api': ^1.0.0-rc.1
+      vue: ^3.0.0-0 || ^2.6.0
+    peerDependenciesMeta:
+      '@vue/composition-api':
+        optional: true
+
   vue-tsc@2.2.0:
     resolution: {integrity: sha512-gtmM1sUuJ8aSb0KoAFmK9yMxb8TxjewmxqTJ1aKphD5Cbu0rULFY6+UQT51zW7SpUcenfPUuflKyVwyx9Qdnxg==}
     hasBin: true
@@ -1870,6 +1896,8 @@ snapshots:
       de-indent: 1.0.2
       he: 1.2.0
 
+  '@vue/devtools-api@6.6.4': {}
+
   '@vue/devtools-core@7.7.1(vite@6.0.11(@types/node@22.10.10)(jiti@2.4.2)(lightningcss@1.29.1))(vue@3.5.13(typescript@5.7.3))':
     dependencies:
       '@vue/devtools-kit': 7.7.1
@@ -2212,6 +2240,16 @@ snapshots:
 
   picomatch@4.0.2: {}
 
+  pinia@2.3.1(typescript@5.7.3)(vue@3.5.13(typescript@5.7.3)):
+    dependencies:
+      '@vue/devtools-api': 6.6.4
+      vue: 3.5.13(typescript@5.7.3)
+      vue-demi: 0.14.10(vue@3.5.13(typescript@5.7.3))
+    optionalDependencies:
+      typescript: 5.7.3
+    transitivePeerDependencies:
+      - '@vue/composition-api'
+
   postcss@8.5.1:
     dependencies:
       nanoid: 3.3.8
@@ -2369,6 +2407,10 @@ snapshots:
 
   vscode-uri@3.0.8: {}
 
+  vue-demi@0.14.10(vue@3.5.13(typescript@5.7.3)):
+    dependencies:
+      vue: 3.5.13(typescript@5.7.3)
+
   vue-tsc@2.2.0(typescript@5.7.3):
     dependencies:
       '@volar/typescript': 2.4.11