Add the sidebar as a pattern and template part

parts/sidebar.html

@@ -0,0 +1 @@
+<!-- wp:pattern {"slug":"kauri/sidebar"} /-->

patterns/sidebar.php

@@ -0,0 +1,35 @@
+<?php
+/**
+ * Title: Sidebar
+ * Slug: kauri/sidebar
+ * Inserter: no
+ */
+?>
+<!-- wp:group {"style":{"spacing":{"padding":{"top":"20px","bottom":"20px","left":"20px","right":"20px"}}},"backgroundColor":"background-secondary","layout":{"type":"constrained"}} -->
+<div class="wp-block-group has-background-secondary-background-color has-background" style="padding-top:20px;padding-right:20px;padding-bottom:20px;padding-left:20px">
+	<!-- wp:search {"label":"Search","showLabel":false,"buttonText":"Search","buttonPosition":"button-inside","buttonUseIcon":true} /-->
+
+	<!-- wp:heading {"level":3} -->
+	<h3 class="wp-block-heading"><?php esc_html_e( 'Recent Posts', 'kauri' ); ?></h3>
+	<!-- /wp:heading -->
+
+	<!-- wp:latest-posts /-->
+
+	<!-- wp:heading {"level":3} -->
+	<h3 class="wp-block-heading"><?php esc_html_e( 'Recent Comments', 'kauri' ); ?></h3>
+	<!-- /wp:heading -->
+
+	<!-- wp:latest-comments {"displayAvatar":false,"displayDate":false,"displayExcerpt":false} /-->
+
+	<!-- wp:heading {"level":3} -->
+	<h3 class="wp-block-heading"><?php esc_html_e( 'Categories', 'kauri' ); ?></h3>
+	<!-- /wp:heading -->
+
+	<!-- wp:categories /-->
+
+	<!-- wp:heading {"level":3} -->
+	<h3 class="wp-block-heading"><?php esc_html_e( 'Archives', 'kauri' ); ?></h3>
+	<!-- /wp:heading -->
+
+	<!-- wp:archives /--></div>
+<!-- /wp:group -->

templates/index.html

@@ -41,7 +41,7 @@
 <!-- /wp:column -->
 
 <!-- wp:column {"width":"300px","style":{"spacing":{"padding":{"top":"0","bottom":"0","left":"0","right":"0"}}}} -->
-<div class="wp-block-column" style="padding-top:0;padding-right:0;padding-bottom:0;padding-left:0;flex-basis:300px"><!-- wp:block {"ref":1842} /--></div>
+<div class="wp-block-column" style="padding-top:0;padding-right:0;padding-bottom:0;padding-left:0;flex-basis:300px"><!-- wp:template-part {"slug":"sidebar","tagName":"aside"} /--></div>
 <!-- /wp:column --></div>
 <!-- /wp:columns --></div>
 <!-- /wp:group -->

theme.json

@@ -290,11 +290,18 @@
 	"templateParts": [
 		{
 			"area": "header",
-			"name": "header"
+			"name": "header",
+			"title": "Header"
 		},
 		{
 			"area": "footer",
-			"name": "footer"
+			"name": "footer",
+			"title": "Footer"
+		},
+		{
+			"area": "uncategorized",
+			"name": "sidebar",
+			"title": "Sidebar"
 		}
 	],
 	"version": 2,