dsh-difference: DeepSeek Harness Set Difference Plugin

dsh-difference is a DeepSeek Harness plugin maintained by uckkk, designed to address set difference calculations and reduce dependencies on external scripts and manual maintenance. Offering a pure Node.js implementation with no runtime network requirements, it enables direct execution of set difference operations within DSH sessions. Installation is straightforward, requiring just one command to integrate into workflows, making it suitable for scenarios that require quick, basic data operations.