dsh-leave-days: Precisely Calculate Annual Leave Days Based on Parameters

The core philosophy of DeepSeek Harness (DSH) is "everything is a plugin." The `dsh-leave-days` plugin introduced in this article is an annual-leave calculation plugin maintained by uckkk. It supports precise calculations based on parameters and returns detailed results without relying on the network. Implemented in Node.js, the plugin is installed at runtime with `dsh plugin add github:uckkk/dsh-leave-days`, and once enabled, it can be invoked directly in conversation. It is suitable for scenarios that require integrating automatic annual-leave calculation logic into agent workflows, but users should check environment dependencies and perform a security review of the source code before use.