A DeepSeek Harness appearance plugin that lets you fully customize the Web UI with a custom theme color, background wallpaper, and fine-grained opacity controls.

Install

# from npm (prebuilt)

dsh plugin --profile web add dsh-any-background

# from GitHub (first run asks for allowBuilds approval — follow the hint, retry)

dsh plugin --profile web add github:Tkingxiao/dsh-any-background

Any plugin you install runs third-party code with your own permissions — it can read your files, use your credentials, and reach the network, and tool approvals don’t sandbox it. GitHub-sourced plugins also run build scripts at install time. Only install sources you trust, and pin a commit (github:owner/repo#sha).

README

English | 中文

A DeepSeek Harness appearance plugin that lets you fully customize the Web UI with a custom theme color, background wallpaper, and fine-grained opacity controls.

Features

PS-style Color Wheel — Pick hue on the ring, adjust saturation & lightness in the inscribed square. Generates a full set of 30+ CSS design tokens in real time and applies them instantly.
Background Wallpaper — Choose any image as your wallpaper. Drag to pan, scroll to zoom inside a viewport-proportional editor. What you see is what you get.
Opacity Controls — Separate sliders for main interface background opacity, settings panel opacity, and wallpaper opacity.
Blur Effect — Adjustable wallpaper blur (0–60 px) for a frosted-glass look.
Persistent — All settings (color, wallpaper, opacity, blur, editor position) are saved to localStorage and restored on next launch.
Bilingual — Full Chinese / English UI with automatic locale detection.
Theme Watchdog — A background watchdog re-asserts the custom theme if the host resets it, so your pick never silently disappears.

Project Structure

dsh-any-background/
├── package.json          # Package metadata, dsh.client declaration, dependencies
├── cordis.patch.yml      # Bundle patch layer (inserted into profile composition)
├── cordis.yml            # Patch overlay for dev usage (pnpm dsh web --patch)
├── tsdown.config.ts      # Build config: node-half (ESM) + client-half (CJS browser bundle)
├── src/
│   ├── index.ts          # Node half — empty shell for Cordis loader mount
│   ├── invariant.ts      # Invariant companion (registers package ownership)
│   └── client/
│       └── index.tsx     # Browser half — ALL UI logic lives here
├── lib/                  # Built output, committed so installs need no build step
│   ├── index.js          # Node entry
│   ├── invariant.js      # Invariant entry
│   ├── client.js         # Browser bundle (wrapped for __ModuleLoader__)
│   └── client.js.map     # Source map
├── README.md             # This file (English)
└── README.zh.md          # 中文版

Implementation

The plugin is a pure client-side Cordis plugin. The node half is an empty shell; all behavior lives in src/client/index.tsx.

Architecture

┌─────────────────────────────────────────────────────────┐
│  apply(ctx)  —  Plugin entry point                      │
├─────────────────────────────────────────────────────────┤
│                                                         │
│  1. Restore saved color → registerCustom() → setTheme   │
│  2. Inject gradient <style> into <head>                 │
│  3. Create state store (defineStore)                    │
│  4. applyWp() → wallpaper + token overrides             │
│  5. Listen theme/change → re-apply                      │
│  6. ResizeObserver → viewport-aware re-positioning      │
│  7. Locale registration (zh/en)                         │
│  8. Settings section injection (ThemeSection)           │
│  9. Deferred boot restore (300ms, 1500ms)               │
│ 10. Theme watchdog (1s interval)                        │
│                                                         │
└─────────────────────────────────────────────────────────┘

Color Wheel

Single <canvas> element: hue ring (360° segments) + inscribed SL square (HSV S-V plane).
hitTest() determines whether a click lands on the ring (hue) or square (saturation/lightness).
HSV values from the canvas are converted to HSL via hsvToHsl() before passing to genTokens().
genTokens() generates 30+ CSS custom properties (--dsw-alias-*) for the picked color, choosing dark or light scheme based on lightness.
The full token set is written as inline styles on <body>, so the theme color never depends on the theme service's timing.

Background Wallpaper

A <div> with position:fixed; z-index:-1 is prepended to <body>.
Image is compressed via Canvas API (max 1600px side, JPEG quality 0.75) and stored as base64 in localStorage.
The editor modal shows a viewport-proportional rectangle; drag to pan, scroll to zoom (0.1×–10×).
Committed position is stored as fractional center coordinates + natural image size, so the layout survives viewport changes.
Wallpaper opacity is applied directly to the <div> element; background color opacity is applied via inline token overrides.

Opacity System

Three independent opacity layers, each with its own slider and localStorage key:

Layer	localStorage key	Default	Mechanism
Main interface	`dsh-any-background:opacity`	85%	Inline CSS variable on `<body>`
Settings panel	`dsh-any-background:settings-opacity`	100%	CSS variable on `<html>` via `[aria-modal]` selector
Wallpaper	`dsh-any-background:wallpaper-opacity`	100%	Direct `style.opacity` on wallpaper `<div>`

Installation

Method 1: npm install (Recommended)

Install the plugin directly from GitHub into your Web profile:

dsh plugin --profile web add github:Tkingxiao/dsh-any-background

Then launch the Web UI:

dsh web

The plugin will appear as a "Theme" section in the Settings panel.

Method 2: npx (No Global Install)

If you don't have dsh installed globally, use npx:

npx @deepseek-ai/dsh plugin --profile web add github:Tkingxiao/dsh-any-background

Then launch:

npx @deepseek-ai/dsh web

Method 3: Local Build (Development)

The lib/ directory is committed, so installs need no build step. To rebuild after editing src/, run the bundle script (needs Node + pnpm):

# 1. Clone this repo
git clone https://github.com/Tkingxiao/dsh-any-background.git
cd dsh-any-background

# 2. Install the build tool
pnpm install

# 3. Rebuild lib/
pnpm run bundle

# 4. Install the plugin into the web profile (from the local checkout)
dsh plugin --profile web add -w .

# 5. Launch
dsh web

Dependencies

Package	Purpose
`@deepseek-ai/cordis`	Plugin framework (Cordis)
`@deepseek-ai/dsh-client-runtime`	Client runtime + `defineStore`
`@deepseek-ai/dsh-client-locale`	i18n (Chinese/English)
`@deepseek-ai/dsh-client-ui-theme`	Theme service (register/setTheme/overrideTokens)
`@deepseek-ai/dsh-invariants`	Package invariant companion
`react` ^18.2.0	UI rendering

License

MIT

Content from the project README on GitHub ↗

Links

GitHub repository ↗ npm package ↗ Install via dsh-market ↗

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Tkingxiao/dsh-any-background