Add SHD MCP plugin package

plugins/shd-mcp-plugin/README.md

@@ -0,0 +1,28 @@
+# SHD MCP plugin package
+
+This directory is the installable Codex plugin. It packages reusable SHD
+workflow Skills and the official SHD MCP connection; it does not contain the
+SHD backend or a second MCP server.
+
+The plugin requires an SHD account authorized for the requested projects and
+modules. Skills do not grant permissions or bypass server-side ACLs.
+
+## Included workflows
+
+- active projects with completion dates and statuses;
+- project status and risk summaries;
+- ProjectBase schema and data-quality audits;
+- guarded task workflows;
+- project file inspection and actions;
+- finance and CRM read/audit workflows;
+- safe bulk-change planning and validation rules.
+
+## MCP connection
+
+The package points to `https://shd.xyz.su/mcp` and requests OAuth for that MCP
+resource. The client stores the resulting authorization; this repository never
+contains an access token.
+
+If a client or SHD installation uses another official endpoint, change the
+connection in `.mcp.json` in that client's secure configuration. Do not commit
+tokens, cookies, client secrets or private host credentials.