diff --git a/src/protocol.rs b/src/protocol.rs
index 6eec650..aee7e7c 100644
--- a/src/protocol.rs
+++ b/src/protocol.rs
@@ -33,12 +33,16 @@ pub const FRIENDS_PROTO: u32 = 1;
 /// change is isolated into its own topic + signature domain so v2 and v3 peers
 /// never share a swarm. Resync everyone, exactly like the W4 avatar bump.
 ///
-/// v4 (0.6.0): `PeerState` gained an optional `music` presence field carrying a
-/// current shared-listening track descriptor and playback timeline. Bytes still
-/// ride the files plane by id; gossip carries only the descriptor/timeline.
-///
-/// v5 (0.7.0): `MusicPresence` gained optional prefetch hints for the next
-/// track so tuned-in listeners can fetch it before the DJ advances.
+/// v4–v5 (0.6.0): the W22 shared-listening / music presence work. `PeerState`
+/// gained an optional `music` presence field (a current shared-listening track
+/// descriptor + playback timeline; the audio bytes still ride the files plane by
+/// id, gossip carries only the descriptor/timeline), and `MusicPresence` then
+/// gained optional prefetch hints for the next track so tuned-in listeners can
+/// fetch it before the DJ advances. Both shipped together in the **0.6.0** release
+/// (commit `bca2ccd`), where the const advanced straight `3 → 5`: there was never
+/// a `GOSSIP_PROTO == 4` build — 4 is a skipped step. (Per `VERSIONING.md` this
+/// breaking gossip change rode the `0.5.1 → 0.6.0` MINOR bump, so the discipline
+/// was honoured; 0.6.1 is a wire-compatible PATCH on top, still proto 5.)
 pub const GOSSIP_PROTO: u32 = 5;
 /// File-transfer plane version (chat attachment request/stream shape). Bump on
 /// any change. Mirrored in [`FILES_ALPN`].