From b23d0f5823c83d5e7bec00bbe9998eabb3e2e98a Mon Sep 17 00:00:00 2001
From: Lakshmi Tanmay <lakshmi@voltcrash.com>
Date: Mon, 2 Nov 2026 15:38:47 +0530
Subject: [PATCH 1/2] fix(shared): preserve literal backslashes in POSIX file
 links

---
 packages/shared/src/path.test.ts | 13 +++++++++++++
 packages/shared/src/path.ts      | 12 ++++++++----
 2 files changed, 21 insertions(+), 4 deletions(-)

diff --git a/packages/shared/src/path.test.ts b/packages/shared/src/path.test.ts
index 9b0ccd8826213..34c6dfcbe9e65 100644
--- a/packages/shared/src/path.test.ts
+++ b/packages/shared/src/path.test.ts
@@ -106,6 +106,19 @@ describe("workspaceRelativeFilePath", () => {
     ["/repo/project/../other/notes.md", "/repo/project", null],
     ["C:\\repo\\project\\src\\..\\..\\notes.md", "C:\\repo\\project", null],
     ["/repo/project/docs/a/../b.md", "/repo/project", "docs/a/../b.md"],
+    ["/repo/a\\b.txt", "/repo", "a\\b.txt"],
+    ["/repo/a/b.txt", "/repo", "a/b.txt"],
+    ["/repo/a\\", "/repo", "a\\"],
+    ["/repo/..\\notes.md", "/repo", "..\\notes.md"],
+    ["/repo/a\\/../../notes.md", "/repo", null],
+    ["/repo\\project/a.txt", "/repo\\project/", "a.txt"],
+    ["/repo/project/a.txt", "/repo\\project", null],
+    ["/repo\\project/a.txt", "/repo/project", null],
+    ["C:\\Repo\\src\\main.ts", "c:/repo/", "src/main.ts"],
+    ["/C:/Repo/src/main.ts", "c:\\repo", "src/main.ts"],
+    ["C:\\Repo\\src\\main.ts", "/c:/repo", "src/main.ts"],
+    ["\\\\SERVER\\Share\\Repo\\src\\main.ts", "\\\\server\\share\\repo", "src/main.ts"],
+    ["\\\\server\\share\\repo\\..\\notes.md", "\\\\server\\share\\repo", null],
   ])("relates %s to %s", (path, workspaceRoot, relativePath) => {
     expect(workspaceRelativeFilePath(path, workspaceRoot)).toBe(relativePath);
   });
diff --git a/packages/shared/src/path.ts b/packages/shared/src/path.ts
index a7cce7cb88f09..ea7a639d9fde6 100644
--- a/packages/shared/src/path.ts
+++ b/packages/shared/src/path.ts
@@ -95,11 +95,15 @@ export function workspaceRelativeFilePath(
   workspaceRoot: string | null | undefined,
 ): string | null {
   if (!workspaceRoot) return null;
-  const normalizedPath = stripSlashPrefixedWindowsDrive(path.replaceAll("\\", "/"));
-  const normalizedRoot = stripSlashPrefixedWindowsDrive(
-    workspaceRoot.replaceAll("\\", "/"),
-  ).replace(/\/+$/, "");
   const caseInsensitive = isWindowsAbsolutePath(stripSlashPrefixedWindowsDrive(workspaceRoot));
+  const normalizedPath = caseInsensitive
+    ? stripSlashPrefixedWindowsDrive(path.replaceAll("\\", "/"))
+    : path;
+  const normalizedRoot = (
+    caseInsensitive
+      ? stripSlashPrefixedWindowsDrive(workspaceRoot.replaceAll("\\", "/"))
+      : workspaceRoot
+  ).replace(/\/+$/, "");
   const pathForCompare = caseInsensitive ? normalizedPath.toLowerCase() : normalizedPath;
   const rootForCompare = caseInsensitive ? normalizedRoot.toLowerCase() : normalizedRoot;
   if (pathForCompare.replace(/\/+$/, "") === rootForCompare) return ".";

From d73686e10cd660fdd19d7a294cbeac56653a6919 Mon Sep 17 00:00:00 2001
From: Lakshmi Tanmay <lakshmi@voltcrash.com>
Date: Mon, 2 Nov 2026 16:32:37 +0530
Subject: [PATCH 2/2] fix(shared): preserve mixed UNC path compatibility

---
 packages/shared/src/path.test.ts | 2 ++
 packages/shared/src/path.ts      | 4 +++-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/packages/shared/src/path.test.ts b/packages/shared/src/path.test.ts
index 34c6dfcbe9e65..1d6348852722c 100644
--- a/packages/shared/src/path.test.ts
+++ b/packages/shared/src/path.test.ts
@@ -118,6 +118,8 @@ describe("workspaceRelativeFilePath", () => {
     ["/C:/Repo/src/main.ts", "c:\\repo", "src/main.ts"],
     ["C:\\Repo\\src\\main.ts", "/c:/repo", "src/main.ts"],
     ["\\\\SERVER\\Share\\Repo\\src\\main.ts", "\\\\server\\share\\repo", "src/main.ts"],
+    ["\\\\SERVER\\Share\\Repo\\src\\main.ts", "//server/share/repo", "src/main.ts"],
+    ["//server/share/a\\b.txt", "//server/share", "a\\b.txt"],
     ["\\\\server\\share\\repo\\..\\notes.md", "\\\\server\\share\\repo", null],
   ])("relates %s to %s", (path, workspaceRoot, relativePath) => {
     expect(workspaceRelativeFilePath(path, workspaceRoot)).toBe(relativePath);
diff --git a/packages/shared/src/path.ts b/packages/shared/src/path.ts
index ea7a639d9fde6..e2c3cd3117aa2 100644
--- a/packages/shared/src/path.ts
+++ b/packages/shared/src/path.ts
@@ -95,7 +95,9 @@ export function workspaceRelativeFilePath(
   workspaceRoot: string | null | undefined,
 ): string | null {
   if (!workspaceRoot) return null;
-  const caseInsensitive = isWindowsAbsolutePath(stripSlashPrefixedWindowsDrive(workspaceRoot));
+  const caseInsensitive =
+    isWindowsAbsolutePath(stripSlashPrefixedWindowsDrive(workspaceRoot)) ||
+    (isNetworkPath(workspaceRoot) && isUncPath(path));
   const normalizedPath = caseInsensitive
     ? stripSlashPrefixedWindowsDrive(path.replaceAll("\\", "/"))
     : path;