Code editor showing a Markdown file with sections titled "Error-Checking," "Meta Descriptions," and "Filters." The Meta Descriptions section explains that descriptions should be between 70 and 160 characters, with part of the paragraph struck through. The Filters section shows a Nunjucks code block setting a pageDescription variable that falls back to a site description and truncates it to 155 characters, then uses it in meta description and Open Graph tags. Below that, a bulleted list notes pages with descriptions that were too short, linking to /now/, /search/, /slash-pages/, and /guestbook/ on brennan.day. A final Markdown code block shows a before-and-after example of a page description, expanded to mention "recent updates."