Update README.md

Author: ochafik

README.md

@@ -6,13 +6,15 @@ MCP Apps are proposed standard inspired by [MCP-UI](https://mcpui.dev/) and [Ope
 
 This repo provides:
 
+- [specification/draft/apps.mdx](./specification/draft/apps.mdx): The Draft Extension Specification. It's still... in flux! Feedback welcome! (also see discussions in [SEP-1865](https://github.com/modelcontextprotocol/modelcontextprotocol/pull/1865)).
+
 - [types.ts](./src/types.ts): Types of JSON-RPC messages used to communicate between Apps & their host
   - Note that MCP Apps also use some standard MCP messages (e.g. `tools/call` for the App to trigger actions on its originating Server - these calls are proxied through the Host), but these types are the additional messages defined by the extension
 - [examples/simple-example](./examples/simple-example): Example Server + Apps
-  - [server.ts](./examples/simple-server/server.ts): MCP server with two tools that declare UI resources of Apps to be show in the chat when called
+  - [server.ts](./examples/simple-server/server.ts): MCP server with three tools that declare UI resources of Apps to be show in the chat when called
   - [ui-react.tsx](./examples/simple-server/src/ui-react.tsx): React App returned by the `create-ui-react` tool shows how to use the `useApp` hook to register MCP callbacks
   - [ui-vanilla.tsx](./examples/simple-server/src/ui-vanilla.ts): vanilla App returned by the `create-ui-vanilla`
-- [specification/draft/apps.mdx](./specification/draft/apps.mdx): The Draft Extension Specification. It's still... in flux! Feedback welcome! (also see discussions in [SEP-1865](https://github.com/modelcontextprotocol/modelcontextprotocol/pull/1865)).
+  - [ui-raw.tsx](./examples/simple-server/src/ui-raw.ts): same as vanilla App but doesn't use the SDK runtime (just its types)
 
 - [message-transport](./src/message-transport.ts): `PostMessageTransport` class that uses `postMessage` to exchange JSON-RPC messages between windows / iframes