DeepSeek Harness Line Selection Copy Enhancement Tool

kezan31/dsh-copy-tool is an enhanced line-selection copy plugin for DeepSeek Harness, designed to address incomplete refactorings caused by missing instructions in the base Write tool. The plugin supports precise line-range selection through flexible array syntax (e.g., `[[633, 889]]`) and provides core features such as automatic indentation handling, diff preview, and atomic file operations. Once installed, it can accurately map source code content to a target file while preserving unselected sections, making it suitable for scenarios requiring efficient and safe code migration and refactoring.