@goodandready/dsh-agent-loop-guard: DeepSeek Harness Runtime Tool-Call and Output Loop Blocker

`dsh-agent-loop-guard` is a native runtime plugin for DeepSeek Harness, designed to intercept infinite retry loops caused by agent tool failures or ambiguous instructions. It prevents resource waste through progress awareness, output stream detection, and user-specified stop words. The plugin requires no core code modifications and supports a zero-core-modification setup, token masking, and native WebUI configuration. It is suitable for preventing agents from falling into dead loops, and installation depends on core libraries such as Cordis.