categories.md

layout	permalink	title	author_profile	sidebar
archive	/categories/	Posts by Category	false	nav links

{% include group-by-array collection=site.posts field="categories" %}

{% for category in group_names %} {% assign posts = group_items[forloop.index0] | sort:'date' | reverse %}

{{ category }}

{% for post in posts %}
• {{ post.title }}
{% endfor %}

{% endfor %}