feedparser gem - (universal) web feed parser and normalizer (XML w/ Atom or RSS, JSON Feed, HTML w/ Microformats e.g. h-entry/h-feed or Feed.HTML, Feed.TXT w/ YAML, JSON or INI & Markdown, etc.)

Fixes missing hentry errors for single posts and archive pages in WordPress

Removes hentry class entries from Wordpress pages, categories and tags. SEO benefits for the website: eliminate related errors from Google Search Console > Structured Data > hatom (markup: microformats.org)

It is created using commonly used microformats and other meta tags. Also tested with the W3C Markup Validation Service.