Add chat/update notification for renaming chats

CHANGELOG.md

@@ -4,6 +4,8 @@
 
 - Fix `/resume` broken for OpenAI chats: handle nil reasoning text during replay, preserve prompt-id after chat replacement, and clear UI before replaying messages. #400
 
+- Add `chat/update` notification for renaming chats. Chat titles are now persisted to the database and broadcast to all connected clients including remote web interface.
+
 ## 0.124.2
 
 - Fix OpenAI Responses API tool calls not executing when streaming response returns empty output, and fix spurious retries caused by stale tool-call state with Copilot encrypted IDs. #398

docs/protocol.md

@@ -1707,6 +1707,36 @@ _Response:_
 interface ChatDeleteResponse {}
 ```
 
+### Chat update (↩️)
+
+A client request to update chat metadata like title.
+Server will persist the change, broadcast to all connected clients via `chat/contentReceived` with metadata content, and return an empty response.
+
+_Request:_
+
+* method: `chat/update`
+* params: `ChatUpdateParams` defined as follows:
+
+```typescript
+interface ChatUpdateParams {
+    /**
+     * The chat session identifier.
+     */
+    chatId: string;
+
+    /**
+     * New title for the chat.
+     */
+    title?: string;
+}
+```
+
+_Response:_
+
+```typescript
+interface ChatUpdateResponse {}
+```
+
 ### Chat selected agent changed (➡️)
 
 A client notification for server telling the user selected a different agent in chat.

src/eca/features/chat.clj

@@ -1142,6 +1142,20 @@
     (messenger/chat-cleared messenger {:chat-id chat-id :messages messages})
     (db/update-workspaces-cache! @db* metrics)))
 
+(defn update-chat
+  "Update chat metadata like title.
+   Broadcasts the change to all connected clients."
+  [{:keys [chat-id title]} db* messenger metrics]
+  (when (and (get-in @db* [:chats chat-id])
+             title)
+    (swap! db* assoc-in [:chats chat-id :title] title)
+    (messenger/chat-content-received messenger
+                                     {:chat-id chat-id
+                                      :role    "system"
+                                      :content {:type :metadata :title title}})
+    (db/update-workspaces-cache! @db* metrics))
+  {})
+
 (defn rollback-chat
   "Remove messages from chat in db until content-id matches.
    Then notify to clear chat and then the kept messages."

src/eca/handlers.clj

@@ -238,6 +238,10 @@
   (metrics/task metrics :eca/chat-fork
     (f.chat/fork-chat params db* messenger metrics)))
 
+(defn chat-update [{:keys [db* messenger metrics]} params]
+  (metrics/task metrics :eca/chat-update
+    (f.chat/update-chat params db* messenger metrics)))
+
 (defn mcp-stop-server [{:keys [db* messenger metrics config]} params]
   (metrics/task metrics :eca/mcp-stop-server
     (f.tools/stop-server! (:name params) db* messenger config metrics)))

src/eca/remote/handlers.clj

@@ -244,6 +244,16 @@
             :variant (:variant body)})
           (no-content))))))
 
+(defn handle-update-chat [{:keys [db*] :as components} request chat-id]
+  (if-not (chat-or-404 db* chat-id)
+    (error-response 404 "chat_not_found" (str "Chat " chat-id " does not exist"))
+    (let [body (parse-body request)
+          config (config/all @db*)]
+      (handlers/chat-update
+       (assoc components :config config)
+       {:chat-id chat-id :title (:title body)})
+      (no-content))))
+
 (defn handle-set-trust [{:keys [db*]} request {:keys [sse-connections*]}]
   (let [body (parse-body request)
         trust (boolean (:trust body))]

src/eca/remote/routes.clj

@@ -66,6 +66,7 @@
                         "model"   [handlers/handle-change-model components request chat-id]
                         "agent"   [handlers/handle-change-agent components request chat-id]
                         "variant" [handlers/handle-change-variant components request chat-id]
+                        "update"  [handlers/handle-update-chat components request chat-id]
                         nil)))
                 6 (let [action (nth segments 4)
                         tcid (nth segments 5)]

src/eca/server.clj

@@ -115,6 +115,9 @@
 (defmethod jsonrpc.server/receive-request "chat/fork" [_ components params]
   (eventually (handlers/chat-fork (with-config components) params)))
 
+(defmethod jsonrpc.server/receive-request "chat/update" [_ components params]
+  (eventually (handlers/chat-update (with-config components) params)))
+
 (defmethod jsonrpc.server/receive-notification "mcp/stopServer" [_ components params]
   (async-notify (handlers/mcp-stop-server (with-config components) params)))