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+# SagoImageBrowser
+
+A Qt6-based image browser application for viewing and managing image collections.
+
+## Features
+
+- Browse images in a directory tree
+- Thumbnail preview of images
+- Single image view mode with keyboard navigation
+- File system navigation
+- Multi-threaded thumbnail generation for responsive UI
+
+## Requirements
+
+- C++17 or later
+- CMake 3.21+
+- Qt6 (Widgets component)
+
+## Building
+
+### Prerequisites
+
+Install Qt6 development files:
+
+```bash
+# On Ubuntu/Debian
+sudo apt-get install qt6-base-dev
+
+# On macOS with Homebrew
+brew install qt6
+```
+
+### Build Steps
+
+```bash
+cd SagoImageBrowser
+mkdir build
+cd build
+cmake ..
+make
+```
+
+The compiled executable will be at `./build/ImageBrowser`
+
+## Running
+
+```bash
+./build/ImageBrowser
+```
+
+## Project Structure
+
+```
+src/
+  ├── main.cpp                 # Application entry point
+  ├── mainwindow.h/cpp         # Main application window
+  ├── imagemodel.h/cpp         # Image data model
+  ├── imageviewwidget.h/cpp    # Image display widget
+  └── thumbnailworker.h/cpp    # Background thumbnail generation
+CMakeLists.txt                 # Build configuration
+```
+
+## License
+
+MIT Expat License
+
+Copyright (c) 2026
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.