MIT-E: a new "Article from link" import source (clipboard icon in the Import Hub) takes any web article URL, strips it to its article body with @mozilla/readability, converts to clean markdown via turndown, and lands the result as a repurposable Library piece with the canonical URL as provenance. Uses the same SSRF guard the webhook paths use — a user-supplied link can never reach internal metadata endpoints. Idempotent: re-importing the same URL returns the existing piece.
MIT-E: the public content feed (api/content-feed/[token]/feed) now renders in three formats selected by URL extension — /feed.xml (RSS 2.0, unchanged), /feed.atom (Atom 1.0), and /feed.json (JSON Feed 1.1). RSS delegates to the existing X5 renderer (output pinned by tests); Atom and JSON use the MIT-licensed `feed` library. All three reuse the shared description cleaner and token plumbing from the X5 seam.