diff --git a/apps/vscode/src/lsp/client.ts b/apps/vscode/src/lsp/client.ts
index 4dc7d22c..c527b2d1 100644
--- a/apps/vscode/src/lsp/client.ts
+++ b/apps/vscode/src/lsp/client.ts
@@ -64,6 +64,7 @@ import { getHover, getSignatureHelpHover } from "../core/hover";
 import { imageHover } from "../providers/hover-image";
 import { LspInitializationOptions, QuartoContext } from "quarto-core";
 import { extensionHost } from "../host";
+import semver from "semver";
 
 let client: LanguageClient;
 
@@ -110,11 +111,16 @@ export async function activateLsp(
     middleware.provideSignatureHelp = embeddedSignatureHelpProvider(engine);
   }
   extensionHost().registerStatementRangeProvider(engine);
-    
+
   // create client options
-  const initializationOptions : LspInitializationOptions = {
+  const initializationOptions: LspInitializationOptions = {
     quartoBinPath: quartoContext.binPath
   };
+
+  const documentSelectorPattern = semver.gte(quartoContext.version, "1.6.24") ?
+    "**/_{brand,quarto,metadata,extension}*.{yml,yaml}" :
+    "**/_{quarto,metadata,extension}*.{yml,yaml}";
+
   const clientOptions: LanguageClientOptions = {
     initializationOptions,
     documentSelector: [
@@ -122,7 +128,7 @@ export async function activateLsp(
       {
         scheme: "*",
         language: "yaml",
-        pattern: "**/_{quarto,metadata,extension}*.{yml,yaml}",
+        pattern: documentSelectorPattern,
       },
     ],
     middleware,
@@ -284,7 +290,7 @@ function embeddedGoToDefinitionProvider(engine: MarkdownEngine) {
         );
         const resolveLocation = (location: Location) => {
           if (isLanguageVirtualDoc(vdoc.language, location.uri) ||
-              location.uri.toString() === vdocUri.uri.toString()) {
+            location.uri.toString() === vdocUri.uri.toString()) {
             return new Location(
               document.uri,
               unadjustedRange(vdoc.language, location.range)
@@ -295,7 +301,7 @@ function embeddedGoToDefinitionProvider(engine: MarkdownEngine) {
         };
         const resolveLocationLink = (location: LocationLink) => {
           if (isLanguageVirtualDoc(vdoc.language, location.targetUri) ||
-              location.targetUri.toString() === vdocUri.uri.toString()) {
+            location.targetUri.toString() === vdocUri.uri.toString()) {
             const locationLink: LocationLink = {
               targetRange: unadjustedRange(vdoc.language, location.targetRange),
               originSelectionRange: location.originSelectionRange
diff --git a/packages/quarto-core/src/document.ts b/packages/quarto-core/src/document.ts
index fde58122..a0df6ed5 100644
--- a/packages/quarto-core/src/document.ts
+++ b/packages/quarto-core/src/document.ts
@@ -1,7 +1,7 @@
 /*
  * document.ts
  *
- * Copyright (C) 2023 by Posit Software, PBC
+ * Copyright (C) 2023-2024 by Posit Software, PBC
  * Copyright (c) Microsoft Corporation. All rights reserved.
  *
  * Unless you have received this program directly from Posit Software pursuant
@@ -22,50 +22,50 @@ import { makeRange } from 'quarto-core';
  * A document in the workspace.
  */
 export interface Document {
-	/**
-	 * The uri of the document, as a string.
-	 */
-	readonly uri: string;
-
-	/**
-	 * The uri of the document, as a URI. 
-	 */
-	readonly $uri?: URI;
-	
-	/**
-	 * The lanugageId of the document
-	 */
-	readonly languageId : string | undefined;
-
-	/**
-	 * Version number of the document's content. 
-	 */
-	readonly version: number;
-
-	/**
-	 * The total number of lines in the document.
-	 */
-	readonly lineCount: number;
-
-	/**
-	 * Get text contents of the document.
-	 * 
-	 * @param range Optional range to get the text of. If not specified, the entire document content is returned.
-	 */
-	getText(range?: Range): string;
-
-	/**
-	 * Converts an offset in the document into a {@link Position position}.
-	 */
-	positionAt(offset: number): Position;
+  /**
+   * The uri of the document, as a string.
+   */
+  readonly uri: string;
+
+  /**
+   * The uri of the document, as a URI. 
+   */
+  readonly $uri?: URI;
+
+  /**
+   * The lanugageId of the document
+   */
+  readonly languageId: string | undefined;
+
+  /**
+   * Version number of the document's content. 
+   */
+  readonly version: number;
+
+  /**
+   * The total number of lines in the document.
+   */
+  readonly lineCount: number;
+
+  /**
+   * Get text contents of the document.
+   * 
+   * @param range Optional range to get the text of. If not specified, the entire document content is returned.
+   */
+  getText(range?: Range): string;
+
+  /**
+   * Converts an offset in the document into a {@link Position position}.
+   */
+  positionAt(offset: number): Position;
 }
 
 export function getLine(doc: Document, line: number): string {
-	return doc.getText(makeRange(line, 0, line, Number.MAX_VALUE)).replace(/\r?\n$/, '');
+  return doc.getText(makeRange(line, 0, line, Number.MAX_VALUE)).replace(/\r?\n$/, '');
 }
 
 export function getDocUri(doc: Document): URI {
-	return doc.$uri ?? URI.parse(doc.uri);
+  return doc.$uri ?? URI.parse(doc.uri);
 }
 
 
@@ -100,6 +100,7 @@ export function isQuartoYaml(doc: Document) {
   return (
     doc.languageId === kYamlLanguageId &&
     (doc.uri.match(/_quarto(-.*?)?\.ya?ml$/) ||
+      doc.uri.match(/_brand\.ya?ml$/) ||
       doc.uri.match(/_metadata\.ya?ml$/) ||
       doc.uri.match(/_extension\.ya?ml$/))
   );
@@ -113,7 +114,7 @@ const kRegExYAML =
   /(^)(---[ \t]*[\r\n]+(?![ \t]*[\r\n]+)[\W\w]*?[\r\n]+(?:---|\.\.\.))([ \t]*)$/gm;
 
 export function isQuartoDocWithFormat(doc: Document | string, format: string) {
-  if (typeof(doc) !== "string") {
+  if (typeof (doc) !== "string") {
     if (isQuartoDoc(doc)) {
       doc = doc.getText();
     } else {
@@ -125,7 +126,7 @@ export function isQuartoDocWithFormat(doc: Document | string, format: string) {
     if (match) {
       const yaml = match[0];
       return (
-        !!yaml.match(new RegExp("^format:\\s+" + format + "\\s*$","gm")) ||
+        !!yaml.match(new RegExp("^format:\\s+" + format + "\\s*$", "gm")) ||
         !!yaml.match(new RegExp("^[ \\t]*" + format + ":\\s*(default)?\\s*$", "gm"))
       );
     }