dsh-mcp-proxy: A context-efficient MCP access method for DSH

dsh-mcp-proxy is an MIT-licensed DSH plugin designed to address the overhead increase caused by registering the complete Schema of all tools into the prompt context when configuring multiple MCP servers. By registering only two proxy tools, `mcp_discover` and `mcp_call`, and utilizing a lazy connection mechanism along with a disk-based tool directory cache to manage subsequent discovery and invocation, this plugin significantly reduces resident prompt costs. Its core functions include `mcp_discover`, which searches the tool directory by keyword, and `mcp_call`, which invokes tools by specifying the server and tool name. The plugin does not connect to servers upon startup, supports `stdio` or `streamable-http` types, and has an empty default server list, requiring manual user configuration. Installation requires N