@rvaim/dsh-compat: DeepSeek Harness Legacy Plugin Compatibility Layer

DeepSeek Harness (DSH) introduces the @rvaim/dsh-compat plugin to resolve compatibility issues with legacy Claude Code/Codex plugins. The plugin adopts an “everything is a plugin” architecture, separating the Source (content retrieval) and Plugin (behavior execution) models to support various sources such as Git, local directories, and archives. It provides full lifecycle management (installation, updates, enabling/disabling) and API interfaces, ensuring that plugins are integrated into the DSH ecosystem securely and atomically for unified management.