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README.md

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+# 🚀 Firefly Launcher
+
+A lightweight and modern launcher for Anime game — designed to make launching, updating, and customizing your game easy and efficient.
+
+---
+
+## ✨ Features
+
+- 🔄 Automatically update Firefly Go and proxy tools on launch
+- 🎮 Launch the game with correct parameters and environment
+- 🌐 Switch in-game language (EN, JP, CN, KR) via Language Tools
+- 📦 Apply game patches using Hdiffz Tool (HDiffPatch-based)
+
+---
+
+## 🧑‍💻 About the Developer
+
+Hi! I'm **Kain**, a developer passionate about building simple and powerful tools.  
+Firefly Launcher is built with:
+
+- ⚙️ **Go + Wails** for backend/frontend integration  
+- 🎨 **Tailwind CSS** + **DaisyUI** for a clean, responsive UI
+
+My goal is to create tools that are fast, efficient, and enjoyable to use.
+
+---
+
+## 📦 Installation
+
+You can choose between:
+
+- ✅ **Portable** version (no install needed)
+- 🛠️ **MSI Installer** (for full integration)
+
+---
+
+## 🛠️ Common Development Commands (Wails v3)
+
+```bash
+# Start the app in development mode (hot reload frontend)
+wails3 dev
+
+# Build the application (production binary)
+wails3 build
+
+# Package the app (NSIS)
+wails3 package
+```
+---
+
+## 📄 License
+
+MIT License — feel free to use and contribute.
+
+---
+