Distribute Genesis Custom Block in a plugin - Include the Genesis Custom Block definition as part of the plugin to simplify distribution. https://www.damiencarbery.com/2020/09/distribute-genesis-custom-block-in-a-plugin/

accordion-block-export.xml

<item>
	<title>Accordion block</title>
	<link>https://example.com/genesis_custom_block/accordion-block/</link>
	<pubDate>Tue, 15 Sep 2020 12:16:12 +0000</pubDate>
	<dc:creator><![CDATA[me]></dc:creator>
	<guid isPermaLink="false">https://example.com/?post_type=genesis_custom_block&#038;p=8</guid>
	<description></description>
	<content:encoded><![CDATA[{"genesis-custom-blocks\/accordion-block":{"name":"accordion-block","title":"Accordion block","excluded":[],"icon":"list","category":{"slug":"widgets","title":"Widgets","icon":null},"keywords":[""],"fields":{"title":{"name":"title","label":"Title","control":"text","type":"string","order":0,"location":"editor","width":"100","help":"","default":"","placeholder":"","maxlength":null},"content":{"name":"content","label":"Content","control":"textarea","type":"textarea","order":1,"location":"editor","width":"100","help":"","default":"","placeholder":"","maxlength":null,"number_rows":4,"new_lines":"autop"}}}}]]></content:encoded>
	<excerpt:encoded><![CDATA[]]></excerpt:encoded>
	<wp:post_id>8</wp:post_id>
	<wp:post_date><![CDATA[2020-09-15 12:16:12]]></wp:post_date>
	<wp:post_date_gmt><![CDATA[2020-09-15 12:16:12]]></wp:post_date_gmt>
	<wp:comment_status><![CDATA[closed]]></wp:comment_status>
	<wp:ping_status><![CDATA[closed]]></wp:ping_status>
	<wp:post_name><![CDATA[accordion-block]]></wp:post_name>
	<wp:status><![CDATA[publish]]></wp:status>
	<wp:post_parent>0</wp:post_parent>
	<wp:menu_order>0</wp:menu_order>
	<wp:post_type><![CDATA[genesis_custom_block]]></wp:post_type>
	<wp:post_password><![CDATA[]]></wp:post_password>
	<wp:is_sticky>0</wp:is_sticky>
	<wp:postmeta>
	<wp:meta_key><![CDATA[_edit_last]]></wp:meta_key>
	<wp:meta_value><![CDATA[1]]></wp:meta_value>
	</wp:postmeta>
</item>

block-accordion-block.php

<details class="genesis-custom-block <?php block_field('className'); ?>">
<summary class="item-title"><?php block_field( 'title' ); ?></summary>
<div class="item-content"><p><?php block_field( 'content' ); ?></p></div>
</details>

gcb-accordion-block.php

<?php
/*
Plugin Name: Accordion block - Genesis Custom Blocks
Plugin URI: https://www.damiencarbery.com/2020/09/distribute-genesis-custom-block-in-a-plugin/
Description: Include the Genesis Custom Block definition as part of the plugin to simplify distribution.
Author: Damien Carbery
Version: 0.1
*/


add_filter( 'genesis_custom_blocks_template_path', 'dcwd_gcb_accordion_block_template_path', 10, 2 );
function dcwd_gcb_accordion_block_template_path( $path, $template_names ) {
	foreach ( (array) $template_names as $template_name ) {
		if ( 'blocks/block-accordion-block.php' == $template_name ) {
			return __DIR__;
		}
	}
	
	return $path;
}


register_activation_hook( __FILE__, 'insert_gcb_accordion_block' );
function insert_gcb_accordion_block() {
	$block_title = 'Accordion block';
	$block_name = sanitize_title( $block_title );
	$block_content = '{"genesis-custom-blocks\/accordion-block":{"name":"accordion-block","title":"Accordion block","excluded":[],"icon":"list","category":{"slug":"widgets","title":"Widgets","icon":null},"keywords":[""],"fields":{"title":{"name":"title","label":"Title","control":"text","type":"string","order":0,"location":"editor","width":"100","help":"","default":"","placeholder":"","maxlength":null},"content":{"name":"content","label":"Content","control":"textarea","type":"textarea","order":1,"location":"editor","width":"100","help":"","default":"","placeholder":"","maxlength":null,"number_rows":4,"new_lines":"autop"}}}}';
	
	$existing_blocks = get_posts( array( 'name' => $block_name, 'fields' => 'ids', 'post_type' => 'genesis_custom_block', ) );
	// Quit if block already registered.
	if ( count( $existing_blocks ) ) {
		return;
	}

	$post = array(
		'post_title' => $block_title,
		'post_name' => $block_name,
		'post_content' => $block_content,
		'post_type' => 'genesis_custom_block',
		'post_status' => 'publish',
		'post_author' => get_current_user_id(),
	);

	$post_id = wp_insert_post( $post );
	if ( is_wp_error( $post_id ) ) {
		error_log( 'Error creating post: ' . $post_id->get_error_message() );
	}
}


add_shortcode( 'gcb_add_accordion_block', 'gcb_add_accordion_block' );
function gcb_add_accordion_block() {
	
	return '<p>No code yet</p>';
	// See import_blocks() in genesis-custom-blocks/php/Admin/Import.php
	
	$block_title = 'Accordion block';
	$block_name = sanitize_title( $block_title );
	$block_content = '{"genesis-custom-blocks\/accordion-block":{"name":"accordion-block","title":"Accordion block","excluded":[],"icon":"list","category":{"slug":"widgets","title":"Widgets","icon":null},"keywords":[""],"fields":{"title":{"name":"title","label":"Title","control":"text","type":"string","order":0,"location":"editor","width":"100","help":"","default":"","placeholder":"","maxlength":null},"content":{"name":"content","label":"Content","control":"textarea","type":"textarea","order":1,"location":"editor","width":"100","help":"","default":"","placeholder":"","maxlength":null,"number_rows":4,"new_lines":"autop"}}}}';
	
	$existing_blocks = get_posts( array( 'name' => $block_name, 'fields' => 'ids', 'post_type' => 'genesis_custom_block', ) );
	if ( count( $existing_blocks ) ) {
		return '<p>Block already registered</p>';
	}
	//else {
	//	return '<p>Block to be uploaded</p>';
	//}*
	//return '<pre>' . var_export( $existing_blocks, true ) . '</pre>';

	$post = array(
		'post_title' => $block_title,
		'post_name' => $block_name,
		'post_content' => $block_content,
		'post_type' => 'genesis_custom_block',
		'post_status' => 'publish',
		'post_author' => get_current_user_id(),
	);

	$post_id = wp_insert_post( $post );
	if ( !is_wp_error( $post_id ) ) {
		return '<p>Post created</p>';
	}
	else {
		return '<p>Error creating post: ' . $post_id->get_error_message() . '</p>';
	}
}