DeepSeek Harness Custom Background Wallpaper Plugin

The dsh-background plugin for DeepSeek Harness allows users to customize the chat interface background, supporting local uploads, URLs, and a no-background mode. It provides automatic image scaling, transparency and mask adjustments, and supports switching between the chat area and fullscreen. Configuration and images are stored persistently and take effect after restart. Installation requires Node.js >= 22 and uses pnpm to add the plugin. The plugin only downloads linked images (20 MB, 20 s, up to 5 redirects) and writes them to a local directory, does not collect private data, and is licensed under MIT.