Some things don't fit in a thread. X Premium accounts can now write and schedule long-form Articles in Orbitwrite.
Start an article
Choose X article from the New post button and the composer opens on your X channel, ready for an article.
You can also switch an X channel to Article from the format menu in the composer. Both show up on accounts with X Premium, which is what X asks for before it publishes an Article.
Write it
An Article is a title, a cover and a body. The editor is the one a Dev.to article gets, set to what X publishes: a heading and a subheading, bold, italic, strikethrough, links, quotes, lists, code blocks, tables, dividers and images. Write in Rich text or switch to Markdown, whichever you think in.
The cover is the one attachment, and the crop is set to the 5:2 shape X shows it at. Images in the body go in with the toolbar's image button, or by pasting or dropping them into the text, as JPEG, PNG or WebP. Embed an X post and the article shows the post itself.
Skip the title and the article's first line becomes the title.
See it the way X will show it
X has two heading levels and one level of list, and it has its own look for code and tables. The preview beside the editor lays the article out as X's reader does, so you see all of that before anyone else does.
Schedule it like a post
Give the Article a time or drop it in the queue, and it waits for approval if your workspace asks for one. It publishes as a post on your profile that opens the article.
Over the API, set postFormat: "article" on an X post and put the headline in platformOptions.twitter.articleTitle.