Studio
Long reads and articles: drafts, media and turning an article into a series of posts.
Section in the service: /articles
The Studio is an editor for big texts. An article lives apart from the post feed, but it's easy to cut announcements from it: the text moves into a post, and the link to the article remains as the connection.
Media
Files are attached by link or upload. For platforms it matters that the image is available at a public address — the service serves it itself, no separate hosting needed.