dsh-plastic-memory: A Memory Plugin for DeepSeek Harness

`dsh-plastic-memory` is a memory management plugin for DeepSeek Harness, designed to address redundancy and contamination in long-term agent memory. Core features include five memory categories, workspace isolation with global read-only protection, a multi-layered governance system, causal tracing, and persistent Markdown storage. The toolset covers memory saving, search, snapshot management, and full-store health scanning. The plugin supports customizing memory types and governance policies through configuration, making it suitable for developers building agents with long-term coherence. It is currently in Beta and requires a Node.js environment.