In your Gemfile:
gem "middleman-blog-authors"
In your config.rb:
activate :authors
In your blog posts, add authors to the metadata:
---
title: Building Middleman Addons
date: 2013-07-17
authors: Darby Frey
---
Create a template for the author page. If this is not your default template, put it in source/layouts:
source/layouts/author.html.haml
---
title: #{author.name}
pageable: true
per_page: 10
---
%h1= author.name
%ul
- page_articles.each do |article|
%li= link_to article.title, article