From 46977dd907e99642aa044fd19940791e801d947c Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Thu, 22 Jan 2026 11:49:23 +0000
Subject: [PATCH 1/3] Initial plan


From f06f17b2750b87700db4b2ed2959c40768177f17 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Thu, 22 Jan 2026 11:54:55 +0000
Subject: [PATCH 2/3] feat: use VS Code locale for document count formatting
 with fallback to en-US

Co-authored-by: tnaum-ms <171359267+tnaum-ms@users.noreply.github.com>
---
 src/utils/formatDocumentCount.ts | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/src/utils/formatDocumentCount.ts b/src/utils/formatDocumentCount.ts
index a4f4bcafe..77a4b89b0 100644
--- a/src/utils/formatDocumentCount.ts
+++ b/src/utils/formatDocumentCount.ts
@@ -3,6 +3,8 @@
  *  Licensed under the MIT License. See License.txt in the project root for license information.
  *--------------------------------------------------------------------------------------------*/
 
+import * as vscode from 'vscode';
+
 /**
  * Formats a document count for display in the tree view.
  * Uses compact notation for large numbers (e.g., "1.2K", "1.5M").
@@ -16,7 +18,15 @@ export function formatDocumentCount(count: number): string {
     }
 
     // Use Intl.NumberFormat for compact notation
-    const formatter = new Intl.NumberFormat('en', {
+    // Try to use the user's VS Code locale, fall back to 'en-US' on failure
+    let locale = 'en-US';
+    try {
+        locale = vscode.env.language || 'en-US';
+    } catch {
+        // Fall back to 'en-US' if vscode.env.language is unavailable
+    }
+
+    const formatter = new Intl.NumberFormat(locale, {
         notation: 'compact',
         maximumFractionDigits: 1,
     });

From 3a8d8eff630efbff8b0dd2fc947e0c5295139c28 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Thu, 22 Jan 2026 11:57:36 +0000
Subject: [PATCH 3/3] refactor: simplify locale handling with optional chaining

Co-authored-by: tnaum-ms <171359267+tnaum-ms@users.noreply.github.com>
---
 src/utils/formatDocumentCount.ts | 9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)

diff --git a/src/utils/formatDocumentCount.ts b/src/utils/formatDocumentCount.ts
index 77a4b89b0..974a30847 100644
--- a/src/utils/formatDocumentCount.ts
+++ b/src/utils/formatDocumentCount.ts
@@ -18,13 +18,8 @@ export function formatDocumentCount(count: number): string {
     }
 
     // Use Intl.NumberFormat for compact notation
-    // Try to use the user's VS Code locale, fall back to 'en-US' on failure
-    let locale = 'en-US';
-    try {
-        locale = vscode.env.language || 'en-US';
-    } catch {
-        // Fall back to 'en-US' if vscode.env.language is unavailable
-    }
+    // Try to use the user's VS Code locale, fall back to 'en-US' if unavailable
+    const locale = vscode.env?.language || 'en-US';
 
     const formatter = new Intl.NumberFormat(locale, {
         notation: 'compact',