dsh-mcp-workspace-scope: Directory-Based Restriction of MCP Tool Injection in DeepSeek Harness

`dsh-mcp-workspace-scope` is a plugin for DeepSeek Harness (DSH) designed to address the issue of MCP tools polluting the context window. It restricts tool injection using directory-level allowlists, applies the longest-path matching rule, and supports automatic inheritance by subdirectories. The plugin provides a dual rejection mechanism that not only hides tools but also intercepts their invocation. It also supports session-level temporary toggles and visual editing, allowing services to be enabled on demand in the Composer. After installation, restarting the Profile is required, and the default configuration file is located at `~/.dsh/mcp-workspace-scope.json`.