diff --git a/sidecar/README.md b/sidecar/README.md
index dac655e..7fcc47a 100644
--- a/sidecar/README.md
+++ b/sidecar/README.md
@@ -57,6 +57,7 @@ still authenticate). Every response carries `X-RustLink-Version`.
 | `GET /feed?since=&limit=` | store | **Oldest first, from a cursor.** For a consumer that must not miss a row. Omitting `since` asks where the end is |
 | `GET /status` | plugin (RPC) | A live round trip. `503` with no plugin, `504` on no reply |
 | `GET /ws` | broadcast | The live feed. Sends `ws.hello` on connect |
+| every later route | plugin (RPC) | One thin forward per command, from `POST /link/confirm` (protocol 3) to `POST /titles` (protocol 12). Each is listed beside its protocol in `src/web.rs`, and its body in `docs/rust-link/PROTOCOL.md` |
 
 The split is the point: the store-backed reads answer while the game is off, which is what lets the
 website render a server list during a wipe or a restart. `/status` is the one route that fails when
diff --git a/sidecar/src/main.rs b/sidecar/src/main.rs
index 6572502..b61a2e6 100644
--- a/sidecar/src/main.rs
+++ b/sidecar/src/main.rs
@@ -163,8 +163,8 @@ use tracing_subscriber::EnvFilter;
 ///
 /// `docs/rust-link/PROTOCOL.md` is the specification — §8 the read path, §9 identity, §10 the
 /// mirror, §11 configuration, §12 clans, §13 the raid frame, §14 the leases, §15 the world verbs,
-/// §16 the rewards, §17 the map; this constant is one of its four declaration sites.
-pub const PROTOCOL_VERSION: u32 = 11;
+/// §16 the rewards, §17 the map, §18 the optional mods; this constant is one of its four declaration sites.
+pub const PROTOCOL_VERSION: u32 = 12;
 
 fn main() -> anyhow::Result<()> {
     let args = match cli::parse(std::env::args().skip(1)) {
diff --git a/sidecar/src/web.rs b/sidecar/src/web.rs
index 12b027c..6a38d1f 100644
--- a/sidecar/src/web.rs
+++ b/sidecar/src/web.rs
@@ -135,6 +135,10 @@ pub async fn serve(addr: &str, state: AppState) -> anyhow::Result<()> {
         .route("/map/chunk", get(map_chunk))
         .route("/map/render", post(map_render))
         .route("/map/live", get(map_live))
+        // Protocol 12 (§33): the chat titles a player has earned. A whole set, replaced each time,
+        // held by the plugin in memory and read by BetterChat on the chat path. Nothing here knows
+        // what a title is.
+        .route("/titles", post(titles))
         .route_layer(middleware::from_fn_with_state(state.clone(), gate));
 
     let app = Router::new()
@@ -565,6 +569,12 @@ async fn chat(State(st): State<AppState>, Json(body): Json<Value>) -> Response {
     forward_object(&st, body, "chat.say", "a chat line").await
 }
 
+/// Replace the chat titles this server's plugin holds (protocol 12). The set is whole, so a retry
+/// is harmless, and the plugin answers whether BetterChat is there to show them.
+async fn titles(State(st): State<AppState>, Json(body): Json<Value>) -> Response {
+    forward_object(&st, body, "titles.set", "a title set").await
+}
+
 /// What this map is, where its picture comes from, and its monuments (protocol 11, stage one).
 /// Live, and never cached here: a wipe changes the answer, and the module compares its key and
 /// hash against what it holds to decide whether to fetch at all.
@@ -1097,6 +1107,24 @@ mod tests {
         assert!(stamp(json!(["9"]), "tally.close", "r-4").is_none());
     }
 
+    /// Protocol 12: a title set is forwarded whole. The markup inside each `text` is the module's
+    /// and the plugin's business, so it must arrive byte for byte as the website composed it.
+    #[test]
+    fn a_protocol_12_title_set_passes_through_untouched() {
+        let body = json!({
+            "cmd": "chat.say",
+            "setId": "s-1",
+            "titles": [{ "steamId": "76561198000000001", "text": "[#ff8800]Top Killer[/#]" }],
+        });
+        let stamped = stamp(body, "titles.set", "r-5").expect("an object is stamped");
+
+        assert_eq!(stamped["cmd"], "titles.set");
+        assert_eq!(stamped["reqId"], "r-5");
+        assert_eq!(stamped["setId"], "s-1");
+        assert_eq!(stamped["titles"][0]["text"], "[#ff8800]Top Killer[/#]");
+        assert!(stamp(json!("titles"), "titles.set", "r-6").is_none());
+    }
+
     /// Protocol 11's one opaque forward is stamped like the rest: a render cannot become a world
     /// placement by naming one.
     #[test]