Context: ipfs/specs#385 (comment).

Currently, the specs files do not use the title in the frontmatter, but in the file itself, which does not happen with the remaining pages. This makes generating listings harder.

Proposal is to add title and description to the frontmatter of the specs. This will allow us to automatically generate the listings of the pages, instead of keeping them manually.

{%- for post in collections.all -%}
  <li>{{ post.data.title }}</li>
{%- endfor -%}

Then, we can add a tag: ipip to the IPIPs and iterate over collections.ipips.