Index: README.md
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--- README.md	(revision c648b0440cedc0fc3d0e04d8fa322d106e12bd95)
+++ README.md	(revision 30f843cbb25b1f5deb55ab0b0a5e08764bd08979)
@@ -15,6 +15,7 @@
 - **Grow**: newsletter, download-for-email, EPK/press kit, link-in-bio,
   show calendar, and **cookie-free statistics**.
-- **Circles** — connect your site with other Klonkt sites and show each other's
-  public posts; decentralized, with no central platform (Ed25519-signed federation).
+- **Circles** — a curated feed of the makers you choose: feature accounts (other Klonkt
+  sites, Mastodon, PeerTube — any fediverse server) and their public posts appear in your
+  Circle. Decentralized, no central platform — built on ActivityPub.
 - **Themes & languages** — multiple palettes (light + dark), interface in EN/NL/DE.
 - **Installable (PWA)**, **privacy-first** (self-hosted fonts, no tracking).
@@ -165,5 +166,5 @@
 - **Templates:** EJS (server-rendered) + **htmx 1.9** (vendored, no build step)
 - **Audio:** ffmpeg-static (bundled)
-- **Circles:** Ed25519-signed pull (libsodium via Node crypto)
+- **Fediverse / Circles:** ActivityPub (HTTP Signatures) — federates with Mastodon, PeerTube and other Klonkt sites
 - **Fonts:** self-hosted variable woff2 (Fraunces / Plus Jakarta Sans)