Introduction

The core philosophy of DeepSeek Harness (DSH) is “everything is a plugin.” The visual style of the Web UI directly affects the experience during long work sessions, and manually modifying CSS is often a high barrier. dsh-theme-background-center is a theme enhancement plugin for the DSH Web UI, maintained by user syOPV. It integrates theme switching, background settings, and ambient light control into a single panel, making interface customization simple and direct.

Core Features

This plugin mainly provides the following capabilities:

  • Theme Switching: Includes four built-in presets—Midnight Blue, Eye-Friendly Green, Cyberpunk, and Paper Ink White—and provides one-click random color schemes.
  • Dreamlike Gradient Backgrounds: Offers gradients such as Dream Purple, Lavender, Aurora, and Peach, with a slowly flowing animation effect.
  • Custom Image Backgrounds: Supports uploading local images as backgrounds. The system automatically compresses images and provides an opacity adjustment option.
  • Frosted Glass Effect: Adds a frosted texture to panels with one click, improving visual hierarchy.
  • Flowing Ambient Ring Light: Adds a neon tube halo along the edges of the input field, accompanied by a flowing gradient light band in adjacent colors. Seven color options are available, and the flow speed can be adjusted between 1 and 10 seconds.
  • Automatic Saving: All configurations are persisted, and automatically restored after refreshing the page or restarting dsh web.

Installation and Activation

Before using the plugin, make sure DeepSeek Harness is installed (requires Node.js 22.19+ or 24+).

git clone https://github.com/syOPV/dsh-theme-background-center.git
cd dsh-theme-background-center
dsh plugin --profile web add .

After installation, you must restart the dsh web process to activate the plugin.

Typical Usage

  1. Open the DeepSeek Harness Web UI.
  2. Go to the General option under the Settings menu.
  3. In the Theme Background panel, click to select a theme, switch gradients, upload an image, enable Frosted Glass, or adjust the ambient light color. All operations take effect immediately.

Notes

The plugin runs with the permissions of the current dsh process. Before installing any third-party plugin, it is recommended to review its source code and license (this project uses the MIT license) to ensure security. The community directory SkillHub provides an index for this plugin.

Conclusion

With this plugin, you can quickly build a development or work interface that matches your personal aesthetic. You can find the project source code and updates on GitHub.