DeepSeek Harness Plugin: dsh-factorial Factorial Calculation

The `dsh-factorial` plugin for DeepSeek Harness (DSH), maintained by developer uckkk, provides pure Node.js factorial calculation functionality in the DSH environment without network dependencies. The plugin is easy to install but requires specific peerDependencies versions. Once installed, users can directly invoke the tool in a session to perform factorial operations. Since it runs with the current process' permissions, it is recommended to review the source code and license before installation. This lightweight tool is well suited for integration into agent workflows that require basic mathematical capabilities.