DeepSeek Harness Enhanced — VS Code extension & Desktop app

Unofficial community project. Enhanced VS Code extension and Desktop app for DeepSeek Harness (DSH). Built on the DSH/Cordis plugin architecture — not affiliated with DeepSeek.

A Claude Code-grade IDE and desktop experience for DeepSeek Harness: inline diff, @mentions, selection context, approval UI, global shortcut, and more.

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Features

VS Code Extension

• Inline Diff Preview — See AI-proposed changes in VSCode's native diff editor with Accept/Reject buttons
• @ File Mentions — Type @ in the chat to quickly reference files and symbols
• Selection Context — Selected code in the editor is automatically injected as context
• Approval UI — Native VSCode notifications for tool approval requests (Allow / Deny / Always allow)
• Plan Mode UI — Dedicated Markdown preview for plan review with comments
• Focus View — Hide tool call cards and show only conversation text
• Global Shortcuts — Quick toggle focus, new session, reopen closed session, etc.
• Secondary Sidebar — Move the chat panel to the secondary sidebar
• Auto-Save — Auto-save dirty editors before AI reads/writes files
• Diagnostics Integration — Problems panel errors auto-injected as context
• Debugger Context — Call stack and variables auto-injected when paused at breakpoints
• Git Worktree Isolation — AI modifications isolated in a separate worktree

Desktop App

• Global Shortcut — Ctrl+Shift+D / Cmd+Shift+D to toggle window from anywhere
• Rich Notifications — Turn-end notifications with session title and message preview, click to jump
• Enhanced Tray — Recent sessions list, quick new session, show/hide
• Application Menu — Full menu bar (File / Edit / View / Go / Help) with SPA actions
• Native File Dialogs — Native open/save dialogs replacing browser-based pickers
• Splash Screen — Improved perceived startup performance
• Auto-Launch Option — Start at login

Kernel Plugin

A DSH kernel plugin (@Shonean/deepseek-harness-vscode-desktop-kernel) that provides the bridge between the IDE and the agent runtime:

• VSCode Bridge API — Custom HTTP endpoints for IDE ↔ kernel communication
• Selection Context — Dynamic system prompt injection from editor selection
• Diff Coordination — File change events pushed to the IDE for diff preview

Installation

Prerequisites

• DeepSeek Harness (required)
• Node.js >= 22.19
• VS Code >= 1.95.0 (for the extension)

VS Code Extension

# Clone
git clone https://github.com/Shonean/deepseek-harness-vscode-desktop.git
cd dsh-vscode

# Build
pnpm install
pnpm run build:vscode
pnpm run pack:vsix

# Install from VSIX
# Code → Extensions → ... → Install from VSIX...
# Select apps/vscode/dist/dsh-vscode-1.0.0.vsix

Desktop App

pnpm run build:desktop
# Build output in apps/desktop/dist/

Kernel Plugin

Install into your DSH profile:

dsh plugin install @Shonean/deepseek-harness-vscode-desktop-kernel

Or add it manually to your profile's cordis.patch.yml.

Architecture

┌─────────────────────────────────────────────────────────┐
│  VS Code Extension / Electron Desktop                   │
│  ┌──────────┬───────────┬────────────┬──────────────┐  │
│  │ DiffMgr  │ Mention   │ Shortcuts  │ Approval UI  │  │
│  ├──────────┼───────────┼────────────┼──────────────┤  │
│  │ Selection│ Plan UI   │ Focus View │ Debugger Ctx │  │
│  └──────────┴───────────┴────────────┴──────────────┘  │
└──────────────────────────────┬──────────────────────────┘
                               │ HTTP + SSE
┌──────────────────────────────▼──────────────────────────┐
│  dsh Kernel                                               │
│  ┌──────────────────────────────────────────────────┐   │
│  │  dsh-vscode-kernel plugin                        │   │
│  │  ┌─────────────┬───────────┬─────────────────┐  │   │
│  │  │ Bridge API  │ Selection │ Diff Coord      │  │   │
│  │  └─────────────┴───────────┴─────────────────┘  │   │
│  └──────────────────────────────────────────────────┘   │
│  Official DSH plugins: tools / fs / session / ...      │
└─────────────────────────────────────────────────────────┘

Development

pnpm install
pnpm run build
pnpm run typecheck

Contributing

Contributions are welcome! Please feel free to submit issues and pull requests.

This project follows the DeepSeek Harness Brand Guidelines — we use "DSH" in naming to avoid confusion with the official product.

License

MIT — see LICENSE for details.

Built on DeepSeek Harness. Not officially affiliated with DeepSeek.