microblog.php

<?php
/*
Plugin Name: Microblog
Author: Josh Pollock
Version: 0.1.0
*/

/**
 * Make sure theme supports aside post format
 */
add_action( 'after_setup_theme', function() {
	$formats = get_theme_support( 'post-formats' );
	$formats = $formats[0];
	if ( ! is_array( $formats ) ) {
		$formats = array( 'aside');

	}elseif( ! in_array( 'aside', $formats ) ) {
		$formats[] = 'aside';
	}

	add_theme_support( 'post-formats', $formats );

}, 50 );

/**
 * Add rewrite rules for small-things microblog
 */
add_action( 'init', function (){

	//pagination rule
	add_rewrite_rule( 'small-things/page/?([0-9]{1,})/?$', 'index.php?post_format=aside&paged=$matches[1]', 'top' );

	//first page rule
	add_rewrite_rule( 'small-things/?$', 'index.php?post_format=aside', 'top' );

});

/**
 * Customize and shorten the asides term link.
 */
add_filter( 'term_link', function( $termlink, $term, $taxonomy ) {
	if ( 'post_format' == $taxonomy && 'Aside' == $term->name ) {
		$termlink = home_url( 'small-things' );
	}

	return $termlink;
}, 10, 3 );

/**
 * Remove asides from main blog index
 */
add_action( 'pre_get_posts', function( $query ) {
	if (
		$query->is_home() && $query->is_main_query() &&
		( ! isset( $query->query_vars[ 'post_format' ] ) ||
	    ( isset( $query->query_vars[ 'post_format' ] ) ) &&
	    'post-format-aside' !=  $query->query_vars[ 'post_format' ] )
	) {
		$query->set( 'tax_query',
			array(
				array(
					'taxonomy' => 'post_format',
					'field'    => 'slug',
					'terms'    => array( 'post-format-aside' ),
					'operator' => 'NOT IN',
				)
			)
		);
	}

});

hi, the small-things rewrite rule don't work, nor in the plugin nor on your website.

anyway, thanks for the code