diff --git a/src/filesystem/index.ts b/src/filesystem/index.ts
index 7b67e63e58..4e9f36bbcd 100644
--- a/src/filesystem/index.ts
+++ b/src/filesystem/index.ts
@@ -554,7 +554,8 @@ server.registerTool(
       const result: TreeEntry[] = [];
 
       for (const entry of entries) {
-        const relativePath = path.relative(rootPath, path.join(currentPath, entry.name));
+        // Normalize to forward slashes for consistent cross-platform glob matching
+        const relativePath = path.relative(rootPath, path.join(currentPath, entry.name)).split(path.sep).join('/');
         const shouldExclude = excludePatterns.some(pattern => {
           if (pattern.includes('*')) {
             return minimatch(relativePath, pattern, { dot: true });
diff --git a/src/filesystem/lib.ts b/src/filesystem/lib.ts
index 17e4654cd5..5d6f3eb292 100644
--- a/src/filesystem/lib.ts
+++ b/src/filesystem/lib.ts
@@ -389,7 +389,8 @@ export async function searchFilesWithValidation(
       try {
         await validatePath(fullPath);
 
-        const relativePath = path.relative(rootPath, fullPath);
+        // Normalize to forward slashes for consistent cross-platform glob matching
+        const relativePath = path.relative(rootPath, fullPath).split(path.sep).join('/');
         const shouldExclude = excludePatterns.some(excludePattern =>
           minimatch(relativePath, excludePattern, { dot: true })
         );