Constant AGENT_PLUGIN_MCP 

pub const AGENT_PLUGIN_MCP: &str = "{\n  \"$schema\": \"https://agent-plugins.org/schemas/1.0.0/mcp.schema.json\",\n  \"mcpServers\": {\n    \"{{MCP_SERVER_NAME}}\": {\n      \"type\": \"stdio\",\n      \"command\": \"csgraph\",\n      \"args\": [\n        \"mcp\",\n        \"--binding\",\n        \"${PLUGIN_ROOT}/.local/code-system-graph/mcp-binding.json\"\n      ],\n      \"env\": {\n        \"CODE_SYSTEM_GRAPH_MCP_ADMIN\": \"0\"\n      }\n    }\n  }\n}\n";

Portable Agent Plugins 1.0 MCP template.