Add blog title at `.content-sidebar-wrap`

add_action('genesis_before_content', 'ystl_add_blog_title');
/**
 *  Add 'Yoga St. Louis Blog' title to 'genesis_before_content' hook.
 *
 *  @since 1.0.0
 *
 *  @param  string  $title  HTML markup of blog title
 *
 *	@return  string  Add title before blog on front page or archive post page.
 *
 */
function ystl_add_blog_title($title) {

	$title = '<a href="http://ystl.dev" id="ystl-blog-title" class="featured-content blog-title">Yoga St. Louis Blog</a>' . '<br />';

	if ( is_front_page() || is_singular( 'post' )  )	{
		echo $title;
	}
	else	{
		echo '';
	}
}
'Replace above with code block below ======================================================='

add_filter('genesis_attr_content_sidebar_wrap', 'build_content_sidebar_wrap');
/**
*  Add attributes to blog title using the `genesis_attr_{context}` filter 
*  in 'genesis/lib/functions/markup.php.'
* 
*  @since 1.0.0
*
*  @param  array $attributes An array of attributes to build the markup.
*  @return array $attributes
*/
function build_content_sidebar_wrap( $attributes ) {

	if ( ! is_front_page() || ! is_singular( 'post' )  )	{
		return $attributes;
	}
	
	$site_url = get_site_url();

	$attributes[‘open’]  	= ‘<a %>’;
	$attributes[‘id']	= 'blog-title';
	$attributes[‘class'] 	= ‘featured-content’;
	$attributes[‘href=""’]	= $site_url;
        $attributes[‘title’]	= ‘Yoga St. Louis Blog’;
        $attributes[‘close’]	= ‘</a>’;
	
	return $attributes;
}

Is the code block below line 23 a better way to go?

Since you are filtering now, on line 32 you need to return $attributes. Also, you can remove the 'else' because you're returning early.

1. Removed array data type within function parameter. Parameter data type is already defined within the filter.

2. Changed function name to better represent what it does.

3. Filled out doc block for filter and callback.

4. Added $attributes to return on line 32.

5. Added $attributes['id'] element at line 38.

6. Lines 37 - 42, changed array variable to array key => value pairs.

Robert,

There are some structure and functional problems in your code. Let's walk through them.

The first function

The else codeblock is not needed at all. The first line should only happen if this web page is the front page OR a single post.

function ystl_add_blog_title() {

	if ( ! is_front_page() && ! is_singular( 'post' )  )	{
		return;
	}
	?>
	
	<a href="http://ystl.dev" id="ystl-blog-title" class="featured-content blog-title">Yoga St. Louis Blog</a><br />
	<?php
}

The second function

1. Remove the else gatekeeper. It's unnecessary. Why? Think about it. IF this is a front page OR a post, then it returns. The else happens anyway if it's not the front page OR a post. Therefore, it's redundant and not needed.

2. The event is : genesis_attr_content-sidebar-wrap.

3. The code will not work until you take those attributes and then apply them yourself to the appropriate markup. Running your code, you get the following markup:

<div open="<div><a %>" class="featured-content" href="=&quot;http://sandbox.dev&quot;" title="Yoga St. Louis Blog" close="</a>"><main class="content" id="genesis-content">

That's not what you want.

Rethinking it

I assume that you are trying to insert a blog title into the page. Correct? Then you want to do this instead:

add_action('genesis_after_content_sidebar_wrap', 'render_blog_page_title_after_content_sidebar_wrap' );
/**
 * Render the blog page title after the `content-sidebar-wrap` HTML element.
 *
 * @since 1.0.0
 *
 * @return void
 */
function render_blog_page_title_after_content_sidebar_wrap() {

	if ( ! is_front_page() && ! is_singular( 'post' ) ) {
		return;
	}

	// move the HTML to a view file to keep the concerns separate.
	?>

	<h2><a href="http://ystl.dev" id="ystl-blog-title" class="featured-content blog-title">Yoga St. Louis Blog</a></h2>

	<?php
}

// Final result:

add_action('genesis_before_content', 'render_blog_page_title_after_content_sidebar_wrap' );
/**

• Render the blog page title on the front and post pages.

• @SInCE 1.0.0

• @return void
  */
  function render_blog_page_title_after_content_sidebar_wrap() {

  if ( is_front_page() || is_singular( 'post' ) ) {

  include( __DIR__ . '/lib/structure/views/blog-title.php' );
  

  }
  }

//Code included from view file (commented out for demonstration purposes):

Yoga St. Louis Blog

// Note: the php echo command in the view file was necessary to render the site url to the browser. The WP callback by itself
// returns an empty string.