What follows are simple nuts and bolts; see the Local Yarn Site Notes for things like history and reasons for existing.
My main CMS is my hard drive: I write with ByWord on Mac and save each post locally in plain-text (Markdown) format before publishing. This text is then saved into the CMS, where web-specific markup is inserted or adjusted if desired.
Body text is set in Kepler, designed in the tradition of classic modern 18th-century typefaces. Top-level headings are set in Livory. Code snippets are set in Matthew Butterick’s Triplicate, which is also my favourite font for writing. Watercolour illustrations are by Jessica Dueck.
The Local Yarn is published with the Textpattern CMS. Some modifications have been made to allow Markdown formatting for comments/notes using Michel Fortin’s PHP MarkdownExtra, and additional HTML filtering using HTML Purifier. The site is hosted on a DigitalOcean VPS.