diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 0000000..6313b56
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1 @@
+* text=auto eol=lf
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..5eebbd4
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,59 @@
+lib-cov
+*.seed
+*.log
+*.csv
+*.dat
+*.out
+*.pid
+*.gz
+*.swp
+
+pids
+logs
+results
+tmp
+
+# Coverage reports
+coverage
+
+# API keys and secrets
+.env
+
+# Dependency directory
+node_modules
+bower_components
+.pnpm-store
+
+# Editors
+.idea
+*.iml
+
+# OS metadata
+.DS_Store
+Thumbs.db
+
+# Ignore built ts files
+dist/
+
+__pycache__/
+
+/.yalc
+yalc.lock
+
+.vscode/settings.json
+
+# Ignore output folder
+
+backend/out
+
+# Make sure to ignore any instance of the loader's decky_plugin.py
+decky_plugin.py
+
+# Ignore decky CLI for building plugins
+out
+out/*
+cli/
+cli/*
+cli/decky
+
+.superpowers/
diff --git a/main.py b/main.py
new file mode 100644
index 0000000..47f74cf
--- /dev/null
+++ b/main.py
@@ -0,0 +1,14 @@
+import os
+import sys
+
+sys.path.insert(0, os.path.join(os.path.dirname(__file__), "py_modules"))
+
+import decky  # noqa: E402
+
+
+class Plugin:
+    async def _main(self):
+        decky.logger.info("Mudfish VPN plugin loaded")
+
+    async def _unload(self):
+        decky.logger.info("Mudfish VPN plugin unloaded")
diff --git a/package.json b/package.json
new file mode 100644
index 0000000..51aee70
--- /dev/null
+++ b/package.json
@@ -0,0 +1,34 @@
+{
+  "name": "mudfish-decky",
+  "version": "0.1.0",
+  "description": "Toggle Mudfish Cloud VPN Full VPN mode from Steam Deck Gaming Mode",
+  "type": "module",
+  "scripts": {
+    "build": "rollup -c",
+    "watch": "rollup -c -w"
+  },
+  "author": "ysj7705",
+  "license": "BSD-3-Clause",
+  "devDependencies": {
+    "@decky/rollup": "^1.0.2",
+    "@decky/ui": "^4.11.0",
+    "@types/react": "19.1.1",
+    "@types/react-dom": "19.1.1",
+    "@types/webpack": "^5.28.5",
+    "rollup": "^4.53.3",
+    "typescript": "^5.6.2"
+  },
+  "dependencies": {
+    "@decky/api": "^1.1.3",
+    "react-icons": "^5.3.0",
+    "tslib": "^2.7.0"
+  },
+  "pnpm": {
+    "peerDependencyRules": {
+      "ignoreMissing": [
+        "react",
+        "react-dom"
+      ]
+    }
+  }
+}
diff --git a/plugin.json b/plugin.json
new file mode 100644
index 0000000..241f14d
--- /dev/null
+++ b/plugin.json
@@ -0,0 +1,11 @@
+{
+  "name": "Mudfish VPN",
+  "author": "ysj7705",
+  "flags": ["root"],
+  "api_version": 1,
+  "publish": {
+    "tags": ["vpn", "mudfish", "root"],
+    "description": "Toggle Mudfish Cloud VPN Full VPN mode from Gaming Mode and pick a Japan node.",
+    "image": ""
+  }
+}
diff --git a/py_modules/mudfish_decky/__init__.py b/py_modules/mudfish_decky/__init__.py
new file mode 100644
index 0000000..0ce9b09
--- /dev/null
+++ b/py_modules/mudfish_decky/__init__.py
@@ -0,0 +1 @@
+"""Mudfish Cloud VPN control for the Decky plugin backend."""
diff --git a/rollup.config.js b/rollup.config.js
new file mode 100644
index 0000000..17e71a7
--- /dev/null
+++ b/rollup.config.js
@@ -0,0 +1,5 @@
+import deckyPlugin from "@decky/rollup";
+
+export default deckyPlugin({
+  // Add your extra Rollup options here
+})
\ No newline at end of file
diff --git a/scripts/deploy.sh b/scripts/deploy.sh
new file mode 100644
index 0000000..07f4166
--- /dev/null
+++ b/scripts/deploy.sh
@@ -0,0 +1,12 @@
+#!/usr/bin/env bash
+# Build the frontend and install the plugin on the Steam Deck, then restart Decky.
+# Needs passwordless sudo for the deck user (development only).
+set -euo pipefail
+cd "$(dirname "$0")/.."
+DECK="${DECK:-deck@192.168.1.50}"
+pnpm build
+tar --exclude='__pycache__' -cf - dist main.py plugin.json package.json py_modules | ssh "$DECK" '
+  D=/home/deck/homebrew/plugins/mudfish-decky
+  sudo rm -rf "$D" && sudo mkdir -p "$D" && sudo tar -xf - -C "$D" &&
+  sudo systemctl restart plugin_loader'
+echo "deployed to $DECK"
diff --git a/scripts/test.sh b/scripts/test.sh
new file mode 100644
index 0000000..514355e
--- /dev/null
+++ b/scripts/test.sh
@@ -0,0 +1,8 @@
+#!/usr/bin/env bash
+# Run the Python unit tests on the Steam Deck (its python3 matches the target runtime closely).
+set -euo pipefail
+cd "$(dirname "$0")/.."
+DECK="${DECK:-deck@192.168.1.50}"
+tar -cf - py_modules tests | ssh "$DECK" '
+  rm -rf /tmp/mfd-test && mkdir /tmp/mfd-test && tar -xf - -C /tmp/mfd-test &&
+  cd /tmp/mfd-test && PYTHONPATH=py_modules python3 -m unittest discover -s tests -t . -v'
diff --git a/src/index.tsx b/src/index.tsx
new file mode 100644
index 0000000..b4ab92c
--- /dev/null
+++ b/src/index.tsx
@@ -0,0 +1,10 @@
+import { PanelSection, staticClasses } from "@decky/ui";
+import { definePlugin } from "@decky/api";
+import { FaFish } from "react-icons/fa";
+
+export default definePlugin(() => ({
+  name: "Mudfish VPN",
+  titleView: <div className={staticClasses.Title}>Mudfish VPN</div>,
+  content: <PanelSection />,
+  icon: <FaFish />,
+}));
diff --git a/tests/__init__.py b/tests/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/tests/test_smoke.py b/tests/test_smoke.py
new file mode 100644
index 0000000..109db42
--- /dev/null
+++ b/tests/test_smoke.py
@@ -0,0 +1,12 @@
+import unittest
+
+import mudfish_decky
+
+
+class SmokeTest(unittest.TestCase):
+    def test_package_imports(self):
+        self.assertTrue(hasattr(mudfish_decky, "__name__"))
+
+
+if __name__ == "__main__":
+    unittest.main()
diff --git a/tsconfig.json b/tsconfig.json
new file mode 100644
index 0000000..078c3e6
--- /dev/null
+++ b/tsconfig.json
@@ -0,0 +1,20 @@
+{
+  "compilerOptions": {
+    "outDir": "dist",
+    "module": "ESNext",
+    "target": "ES2020",
+    "jsx": "react-jsx",
+    "declaration": false,
+    "moduleResolution": "node",
+    "noUnusedLocals": true,
+    "noUnusedParameters": true,
+    "esModuleInterop": true,
+    "noImplicitReturns": true,
+    "noImplicitThis": true,
+    "noImplicitAny": true,
+    "strict": true,
+    "allowSyntheticDefaultImports": true
+  },
+  "include": ["src"],
+  "exclude": ["node_modules"]
+}