Merge branch 'modelcontextprotocol:main' into skippable-initialization

Author: ZachGerman

docs/docs/develop/build-server.mdx

@@ -252,9 +252,12 @@ Forecast: {period['detailedForecast']}
 Finally, let's initialize and run the server:
 
 ```python
-if __name__ == "__main__":
+def main():
     # Initialize and run the server
     mcp.run(transport='stdio')
+
+if __name__ == "__main__":
+    main()
 ```
 
 Your server is complete! Run `uv run weather.py` to start the MCP server, which will listen for messages from MCP hosts.

docs/specification/draft/schema.mdx

@@ -319,6 +319,15 @@ export interface Icon {
    * If not provided, the client should assume that the icon can be used at any size.
    */
   sizes?: string[];
+
+  /**
+   * Optional specifier for the theme this icon is designed for. `light` indicates
+   * the icon is designed to be used with a light background, and `dark` indicates
+   * the icon is designed to be used with a dark background.
+   *
+   * If not provided, the client should assume the icon can be used with any theme.
+   */
+  theme?: 'light' | 'dark';
 }
 
 /**