DeepSeek Harness Security Plugin: dsh-mcpguard

`dsh-mcpguard` is the first security plugin in the DeepSeek Harness (DSH) ecosystem, designed to intercept Prompt injection, homoglyphs, Shell commands, and credential leakage risks in configuration files. Maintained by ChenLaoshiYF, it provides static scanning with JSON reports and experimental runtime observation, running entirely locally with no network requests and built-in privacy protection mechanisms. Developers can install and use it via CLI or a graphical interface to detect potential security risks before code execution.