A thread its owner publishes becomes readable by anyone. The store gains publish/readPublished/feed; the handle is stamped at publish time so the feed needs no account lookup, and unpublishing keeps the row private again. GET /api/mime-feed lists published mimes newest first (code, handle, the words it was asked for, head source, version count), paged by publishedAt, with receipts, diagnostics and the ledger left out. POST /api/whistlegraph-publish flips the flag for the owner. publicThread now reports published so the phone can show the switch. In the app, Explore mimes opens a full-screen vertical pager: one AC runtime behind transparent cards renders whichever mime is in view, each card shows the handle, caption, /code and version count, Make your own leads to sign-in or back to the workspace, and Report mails the desk. It sits on the signed-out screen and in Your Pieces, where a Publish switch puts the open piece on mime.ac once it has a made version.