dsh-deja: A Cross-Agent Shared Memory Plugin for DeepSeek Harness

`dsh-deja` is a plugin for DeepSeek Harness designed to resolve the memory fragmentation issue among multiple coding agents (such as Claude Code and Cursor). It indexes session history on the local disk to build a shared index, enabling all agents to access a unified memory store without cloud servers. The plugin supports full indexing, automatic recall, compression-resistant logging, tracking of file and decision changes, local privacy protection, and cross-device synchronization. After installation, users can query memories, mark decision statuses, and synchronize memory directly through commands, ensuring contextual consistency across different tools and improving collaboration efficiency.