dsh-theme-lab

The preview build of DeepSeek Harness ships with a single, uniform interface that offers little room for visual personalization. dsh-theme-lab is a community-built theme extension that closes that gap, letting users switch the entire visual language of Harness as effortlessly as changing an OS appearance mode, all without modifying the native architecture.

The package ships four hand-tuned palettes: Event Horizon, Cyber Sakura, Obsidian Gold, and Digital Rain. Each is built on sixteen semantic design tokens with explicit light and dark values to guarantee readable contrast. Theme selection persists through the native Harness Settings namespace, so the choice survives a page reload with no localStorage fallback. A responsive WebP hero illustration appears only during the pre-conversation hero phase and never intrudes on an active chat. Reverting to the default theme or uninstalling the plugin triggers full cleanup of every token override, slot, and subscription, leaving zero residual styles behind.

For developers who want to explore or build their own themes, Theme Lab keeps everything in a single data-driven registry for cards, palettes, artwork, and asset routes. Adding a new theme requires just one registry entry, one optimized WebP file, and a complete 16-token palette, with no controller branching needed. That makes it both a ready-to-use dress-up kit and a lightweight, well-structured starting point for custom theme work.