The Web UI of DeepSeek Harness (DSH) provides a basic interactive interface, but the default background is usually plain. If you want a more visually dynamic background in a terminal or browser window—not just a static single color—standard configuration may not be enough. Below is a community-maintained plugin that reconstructs a whale silhouette using a particle system, providing a decorative Web UI background.

Plugin Introduction

This plugin is named dsh-whale-bg, maintained by developer gooosie. It is an unofficial Web UI background that transforms DeepSeek’s fish-shaped outline into a swarm composed of particles of various sizes.

The plugin reuses MIT-licensed fish geometry data from the DeepSeek Harness repository. It provides a complete set of particle animation logic, including entry assembly, idle swimming, mouse interaction, and lighting effects, aiming to provide visual decoration without imposing too much system resource overhead.

Core Features

The plugin’s core capabilities focus on particle animation and interaction feedback:

  1. Entry effect: Particles automatically assemble from a scattered state into a whale shape.
  2. Idle swimming: The edges remain loose, and the tail exhibits a traveling wave effect, simulating biological swimming.
  3. Mouse interaction: Hovering generates radial repulsion; particles near the mouse are pushed away, with a cubic attenuation algorithm for the force decay.
  4. Flashlight lighting: The light closely follows the cursor; the whale appears near the cursor and is nearly invisible when far from it.
  5. Theme support: Provides light and dark themes, corresponding to different blend modes.
  6. Rendering performance: Locked to 30 FPS to minimize the impact of the decorative layer on overall performance.

Installation and Enablement

Installation must be done using DSH’s CLI tool. DSH’s web command always starts the configuration profile named web, so the plugin must be installed in that profile.

  1. Run the installation command:
    dsh plugin --profile web add dsh-whale-bg@0.1.0
  1. Start the Web interface:
    dsh web
  1. To remove the plugin:
    dsh plugin --profile web remove dsh-whale-bg

Notes

Before using it, you need to be aware of the following fact-based constraints:

  • Community project: This is a community project and has no official affiliation, maintenance, or endorsement by DeepSeek.
  • Source dependency: The fish geometry data is reused from the DeepSeek Harness repository and is protected by the MIT License.
  • Configuration profile restriction: Because the dsh web command always starts the web profile, the plugin must be installed under that profile and cannot be arbitrarily switched to other profiles.
  • Version compatibility: The plugin was developed for @deepseek-ai/dsh@0.1.0-rc.6. DeepSeek Harness is in developer preview, so future versions may require plugin updates or changes.

Conclusion

dsh-whale-bg provides a lightweight visual decoration solution, suitable for developers who want to add a dynamic background to the DeepSeek Harness Web interface. By combining a particle swarm with flashlight lighting, it enriches the interface’s expressiveness without sacrificing performance.

Plugin directory and source repository:
SkillHub Directory
GitHub Repository