diff --git a/packages/core/src/types/spec.types.2026-07-28.ts b/packages/core/src/types/spec.types.2026-07-28.ts
index 7305df046..1b222b989 100644
--- a/packages/core/src/types/spec.types.2026-07-28.ts
+++ b/packages/core/src/types/spec.types.2026-07-28.ts
@@ -3,7 +3,7 @@
  *
  * Source: https://github.com/modelcontextprotocol/modelcontextprotocol
  * Pulled from: https://raw.githubusercontent.com/modelcontextprotocol/modelcontextprotocol/main/schema/draft/schema.ts
- * Last updated from commit: 9d700ed62dcf86cb77475c9b81930611a9182f46
+ * Last updated from commit: 77cb26481e439d3437bc2bd6ccd19fcae86bb1ec
  *
  * DO NOT EDIT THIS FILE MANUALLY. Changes will be overwritten by automated updates.
  * To update this file, run: pnpm run fetch:spec-types 2026-07-28
@@ -569,7 +569,7 @@ export interface DiscoverRequest extends JSONRPCRequest {
  *
  * @category `server/discover`
  */
-export interface DiscoverResult extends Result {
+export interface DiscoverResult extends CacheableResult {
     /**
      * MCP Protocol Versions this server supports. The client should choose a
      * version from this list for use in subsequent requests.
@@ -674,6 +674,9 @@ export interface ClientCapabilities {
      * (e.g., "io.modelcontextprotocol/oauth-client-credentials"), and values are
      * per-extension settings objects. An empty object indicates support with no settings.
      *
+     * Keys MUST follow the {@link MetaObject | `_meta` key naming rules}, with a
+     * mandatory prefix.
+     *
      * @example Extensions — MCP Apps (UI) extension with MIME type support
      * {@includeCode ./examples/ClientCapabilities/extensions-ui-mime-types.json}
      */
@@ -768,6 +771,9 @@ export interface ServerCapabilities {
      * (e.g., "io.modelcontextprotocol/tasks"), and values are per-extension settings
      * objects. An empty object indicates support with no settings.
      *
+     * Keys MUST follow the {@link MetaObject | `_meta` key naming rules}, with a
+     * mandatory prefix.
+     *
      * @example Extensions — Tasks extension support
      * {@includeCode ./examples/ServerCapabilities/extensions-tasks.json}
      */
@@ -2963,6 +2969,18 @@ export interface ElicitResult {
     content?: { [key: string]: string | number | boolean | string[] };
 }
 
+/**
+ * Parameters for a {@link ElicitationCompleteNotification | notifications/elicitation/complete} notification.
+ *
+ * @category `notifications/elicitation/complete`
+ */
+export interface ElicitationCompleteNotificationParams extends NotificationParams {
+    /**
+     * The ID of the elicitation that completed.
+     */
+    elicitationId: string;
+}
+
 /**
  * An optional notification from the server to the client, informing it of a completion of a out-of-band elicitation request.
  *
@@ -2973,12 +2991,7 @@ export interface ElicitResult {
  */
 export interface ElicitationCompleteNotification extends JSONRPCNotification {
     method: 'notifications/elicitation/complete';
-    params: {
-        /**
-         * The ID of the elicitation that completed.
-         */
-        elicitationId: string;
-    };
+    params: ElicitationCompleteNotificationParams;
 }
 
 /* Client messages */