Introduction

When building an agent with DeepSeek Harness (DSH), if the agent needs to verify web content or browse pages, a system browser window is usually opened. This window can cover the conversation interface, interrupt the agent’s workflow, and make automated screenshots difficult. dsh-web-verify-panel is designed to address this problem by routing web requests into the DSH sidebar, preserving context continuity.

What Is This

dsh-web-verify-panel is a DSH plugin that reuses the sidebar panel and renders web pages in a sandboxed iframe. It solves the window-switching problem when an agent needs to open a web page for verification and allows the computer_screenshot tool to directly capture the page area without dealing with system browser window occlusion.

Core Features

  1. Same-window workflow: The page and conversation remain in the same window, so the agent does not need to switch back and forth between a browser and the conversation.
  2. Direct screenshots: computer_screenshot can directly capture the page area without being blocked by a system browser window.
  3. Sandbox isolation: The panel renders in a sandboxed iframe, does not share the system browser’s signed-in state, and tabs in each session are independent from one another.
  4. Resource reuse: It reuses the sidebar panel and does not launch an additional browser process.
  5. Tool support: Provides the web_verify_open(url, title?) tool, which opens a web page in the sidebar and returns the page area as a rect that can be used directly as the region for computer_screenshot.
  6. Automatic adaptation: When a page is opened, the panel is automatically widened (about 60% of the viewport, capped at 1600px) and restored after 60 seconds; it also automatically patches the Router Standard preset so the tool is available from the first turn of a session.

Installation and Activation

Before installing, make sure the prerequisite plugin dsh-better-sidebar (sidebar card browser) is installed.

# 复制插件文件到 profiles 目录
Copy-Item -Recurse -Force dsh-web-verify-panel "$env:USERPROFILE\.dsh\profiles\web-desktop\node_modules\"

# 在 cordis.patch.yml 末尾追加以下内容
#   - insert:
#       - id: web-verify-panel
#         name: 'dsh-web-verify-panel'

# 运行补丁脚本
node "$env:USERPROFILE\.dsh\profiles\web-desktop\node_modules\dsh-web-verify-panel\scripts\patch-router-preset.mjs"

# 重启 DSH，并在 Web 页面执行硬刷新（Ctrl+Shift+R）

Typical Usage

  1. Open a web page: Use the tool web_verify_open(url, title?) to open the target page in the sidebar. The tool returns a rect object representing the page area within the DSH window.
  2. Capture the page: Use computer_screenshot(region=rect) to directly capture that page area.

Use Cases and Considerations

  • Dependencies: The plugin depends on computer-user (screenshots) and dsh-better-sidebar (panel). If these dependencies are not installed, the tool is still registered, but opening and screenshots cannot be completed.
  • Compatibility:
    • Windows desktop: Both opening and screenshots are available.
    • macOS / Linux: Opening is available; screenshots require a platform-specific computer-use implementation.
    • Web version: It works on the same machine; remote deployment only supports opening (manual viewing).
  • Limitations:
    • Sites rejected by response headers such as X-Frame-Options will display blank.
    • rect is calculated relative to the DSH window. If the DSH window is not fullscreen, first take a full-screen screenshot to locate the window, then obtain the page area.
  • Security notice: The plugin runs with the current DSH process permissions. Review the source code and license before installing.

Closing

dsh-web-verify-panel integrates web verification into the DSH sidebar, reducing window switching and improving the automation of agent web-content handling. See GitHub repository or skill directory for more details.