dsh-plugin-education: DeepSeek Harness Education Toolkit

The DeepSeek Harness (DSH) Education Plugin adopts a plugin-based architecture, providing agents with a standardized set of educational tools. It includes nine core tools covering the full teaching workflow, including course outline generation, quiz validation, rubric development, study plan scheduling, and grade statistics. After installation, the process must be restarted, and prompt command registration and ordering can be adjusted through configuration parameters. The plugin logic is purely functional and side-effect free, and startup compatibility issues have been fixed, providing comprehensive support for structured DSH applications in educational scenarios.