capsite: pesos.madmode.com as the candidate public origin

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

social-coop-checklist.md

@@ -88,6 +88,12 @@ sit under each goal.
               keypair, HTTP Signatures), so `Update`/`Delete` arrive
               instead of being polled for. Needs a public HTTPS origin
               whose hostname is its identity; choose it once.
+              Candidate: `pesos.madmode.com`. It names the purpose
+              rather than the protocol or the server, and it can be
+              the one public origin for all the caches (diigo, zotero,
+              fedi), with routes or a front worker dispatching by path
+              over service bindings. The follower actor would be
+              something like `@pesos@pesos.madmode.com`.
         - [ ] 8-iii. Neither reaches favourites, bookmarks, or
               mentions: those stay on the client API (or the server's
               account archive).