DeepSeek Harness System Information Tool `dsh-tool-sysinfo`

`dsh-tool-sysinfo` is a system information tool plugin for DeepSeek Harness, designed to help agents obtain snapshots of local environment configurations. Built exclusively with native Node.js modules, it has zero external dependencies, zero network requests, and zero write operations, and can read information such as the operating system, CPU, memory, hostname, and Node.js version. Users can install it via the official command, and after a restart, they can ask the agent in the chat interface to call the `system_info` tool to view the data. The plugin is implemented as a single file, and maintainers recommend using pnpm ≥ 11 to avoid a known bug on Windows.