DeepSeek Harness Plugin: A Spec-Driven Development (SDD) Three-Skill Set

The DeepSeek Harness (DSH) plugin `dsh-spec` adopts the Spec-Driven Development (SDD) philosophy, with the core principle that “everything is a plugin,” and is designed to address the challenge of ambiguous requirements in development. The plugin consists of three independent skills: `dsh-spec-new`, which transforms an idea into a Spec document containing requirements, design, and tasks; `dsh-spec-implement`, which generates code based on the Spec; and `dsh-spec-validate`, which generates acceptance criteria for validation. Users need to install dependencies and enable the plugin first, and then can complete a closed-loop development process—from requirement definition and code implementation to final acceptance—using natural language instructions.