jekyll-collection-pages adds automated index pages, layout selection, and optional pagination for any Jekyll collection. In a few minutes you can stand up front-matter key based landing pages like "tags" or "categories" that stay in sync with your content.

1. Add the gem to your site’s Gemfile:

   gem 'jekyll-collection-pages'

2. Enable the plugin in _config.yml:

   plugins:
     - jekyll-collection-pages

3. Ensure the collections you plan to index have output: true so the generated pages can link to the documents.

Add a collection_pages entry for each collection/field combination you want to index:

collections:
  docs:
    output: true

collection_pages:
  - collection: docs
    field: category
    path: docs/category
    layout: category_layout.html
    paginate: 6

Key options:

• collection: collection label (matches collections config).
• field: front-matter key to group documents (string or list values).
• path: base folder for generated pages (relative to site root).
• layout: layout in _layouts/ (defaults to collection_layout.html).
• paginate: optional integer for per-page pagination.

You can declare multiple entries—single collection with many fields, or multiple collections:

collection_pages:
  - collection: docs
    field: category
    path: docs/category
    layout: category_layout.html
    paginate: 6
  - collection: articles
    field: tags
    path: articles/tags
    layout: tags_layout.html
    paginate: 10

Run bundle exec jekyll serve and visit the generated paths, e.g. /docs/category/getting-started/. The plugin injects these variables into layouts:

• page.tag: value of the current field.
• page.posts: documents in that field bucket.
• page.paginator: pagination data when paginate is set (same shape as Jekyll paginator).

{% raw %}
---
layout: default
---
<h1>{{ page.tag }}</h1>
<ul>
  {% for doc in page.posts %}
    <li><a href="{{ doc.url | relative_url }}">{{ doc.data.title }}</a></li>
  {% endfor %}
</ul>
{% endraw %}

Every build populates a hash at site.data.collection_pages[collection][field] that contains:

• template → the sanitized template the generator used (/docs/category/:field/index.html for unpaginated configs, /docs/category/:field/page:num/index.html when paginate is positive).
• permalink → the sanitized template for the index with placeholders intact (:num never appears here because it always points to page 1, e.g. /docs/category/:field/)
• pages → documents grouped by label ({ label => [documents...] })
• labels: metadata describing the generated index pages

Iterate through the documents for a field:

{% raw %}
{% assign docs_info = site.data.collection_pages.docs.category %}
{% for entry in docs_info.pages %}
  {% assign label = entry | first %}
  {% assign documents = entry | last %}
  <h2>{{ label }}</h2>
  <p>{{ documents.size }} docs</p>
{% endfor %}
{% endraw %}

Pair the documents with their metadata when you need generated URLs or pagination helpers:

{% raw %}
{%- assign info = site.data.collection_pages.articles.tags %}

{% for entry in info.pages %}
  {% assign label = entry | first %}
  {% assign documents = entry | last %}
  {% assign meta = info.labels[label] %}
  <h2> <a href="{{ meta.index.url | relative_url }}">{{ label }}</a> ({{ documents.size }})</h2>
  <ul>
  {% for entry in documents %}
    <li><a href="{{ entry.url }}">{{ entry.title }}</a></li>
  {% endfor %}
  </ul>
{% endfor %}
{% endraw %}

Or create the links to the generated documents by subsituting the path:

{% raw %}
{%- assign info = site.data.collection_pages.articles.tags %}
{%- assign index_permalink = site.data.collection_pages.articles.tags.permalink %}

{% for entry in info.pages %}
  {% assign label = entry | first %}
  {% assign documents = entry | last %}
  {% assign tag_url = index_permalink | replace: ':field', label %}
  <h2> <a href="{{ tag_url | relative_url }}">{{ label }}</a> ({{ documents.size }})</h2>
  <ul>
  {% for entry in documents %}
    <li><a href="{{ entry.url }}">{{ entry.title }}</a></li>
  {% endfor %}
  </ul>
{% endfor %}
{% endraw %}