Debounce en notificaciones list_changed al registrar tools/prompts/resources

Cuando un browser se conecta y registra N tools de golpe, se enviaban
N notificaciones tools/list_changed en rapida sucesion. Claude Code
las ignoraba y no veia las herramientas hasta el siguiente cambio.
Ahora se agrupan con debounce de 500ms: una sola notificacion al final.

build/index.js

@@ -24910,6 +24910,43 @@ var wsClient = null;
 var MCP_PATH = "/mcp";
 var pendingRequests = /* @__PURE__ */ new Map();
 var requestIdCounter = 1;
+var toolListChangedTimer = null;
+var promptListChangedTimer = null;
+var resourceListChangedTimer = null;
+var LIST_CHANGED_DEBOUNCE_MS = 500;
+function debouncedToolListChanged() {
+  if (toolListChangedTimer) clearTimeout(toolListChangedTimer);
+  toolListChangedTimer = setTimeout(async () => {
+    toolListChangedTimer = null;
+    try {
+      await mcpServer.sendToolListChanged();
+    } catch (e) {
+      console.error("Error sending tool list changed:", e);
+    }
+  }, LIST_CHANGED_DEBOUNCE_MS);
+}
+function debouncedPromptListChanged() {
+  if (promptListChangedTimer) clearTimeout(promptListChangedTimer);
+  promptListChangedTimer = setTimeout(async () => {
+    promptListChangedTimer = null;
+    try {
+      await mcpServer.sendPromptListChanged();
+    } catch (e) {
+      console.error("Error sending prompt list changed:", e);
+    }
+  }, LIST_CHANGED_DEBOUNCE_MS);
+}
+function debouncedResourceListChanged() {
+  if (resourceListChangedTimer) clearTimeout(resourceListChangedTimer);
+  resourceListChangedTimer = setTimeout(async () => {
+    resourceListChangedTimer = null;
+    try {
+      await mcpServer.sendResourceListChanged();
+    } catch (e) {
+      console.error("Error sending resource list changed:", e);
+    }
+  }, LIST_CHANGED_DEBOUNCE_MS);
+}
 async function handleWebSocketMessage(message) {
   try {
     const data = JSON.parse(message);
@@ -25006,11 +25043,11 @@ async function handleWebSocketMessage(message) {
         console.error(`No pending request found for ID: ${id}`);
       }
     } else if (data.type === "toolRegistered") {
-      await mcpServer.sendToolListChanged();
+      debouncedToolListChanged();
     } else if (data.type === "resourceRegistered") {
-      await mcpServer.sendResourceListChanged();
+      debouncedResourceListChanged();
     } else if (data.type === "promptRegistered") {
-      await mcpServer.sendPromptListChanged();
+      debouncedPromptListChanged();
     } else if (data.type === "welcome") {
       console.error(`Connected to path: ${data.channel}`);
     } else if (data.type === "pong") {

src/server.js

@@ -48,6 +48,36 @@ const MCP_PATH = '/mcp';
 const pendingRequests = new Map();
 let requestIdCounter = 1;
 
+// Debounce timers for list changed notifications
+let toolListChangedTimer = null;
+let promptListChangedTimer = null;
+let resourceListChangedTimer = null;
+const LIST_CHANGED_DEBOUNCE_MS = 500;
+
+function debouncedToolListChanged() {
+    if (toolListChangedTimer) clearTimeout(toolListChangedTimer);
+    toolListChangedTimer = setTimeout(async () => {
+        toolListChangedTimer = null;
+        try { await mcpServer.sendToolListChanged(); } catch (e) { console.error('Error sending tool list changed:', e); }
+    }, LIST_CHANGED_DEBOUNCE_MS);
+}
+
+function debouncedPromptListChanged() {
+    if (promptListChangedTimer) clearTimeout(promptListChangedTimer);
+    promptListChangedTimer = setTimeout(async () => {
+        promptListChangedTimer = null;
+        try { await mcpServer.sendPromptListChanged(); } catch (e) { console.error('Error sending prompt list changed:', e); }
+    }, LIST_CHANGED_DEBOUNCE_MS);
+}
+
+function debouncedResourceListChanged() {
+    if (resourceListChangedTimer) clearTimeout(resourceListChangedTimer);
+    resourceListChangedTimer = setTimeout(async () => {
+        resourceListChangedTimer = null;
+        try { await mcpServer.sendResourceListChanged(); } catch (e) { console.error('Error sending resource list changed:', e); }
+    }, LIST_CHANGED_DEBOUNCE_MS);
+}
+
 // Function to handle WebSocket messages
 async function handleWebSocketMessage(message) {
     try {
@@ -174,11 +204,11 @@ async function handleWebSocketMessage(message) {
                 console.error(`No pending request found for ID: ${id}`);
             }
         } else if (data.type === 'toolRegistered') {
-            await mcpServer.sendToolListChanged();
+            debouncedToolListChanged();
         } else if (data.type === 'resourceRegistered') {
-            await mcpServer.sendResourceListChanged();
+            debouncedResourceListChanged();
         } else if (data.type === 'promptRegistered') {
-            await mcpServer.sendPromptListChanged();
+            debouncedPromptListChanged();
         } else if (data.type === 'welcome') {
             // Welcome message from the server, we're already connected to the MCP path
             console.error(`Connected to path: ${data.channel}`);