From 36197f5ff8d98e582b2ea9da3e851937102d2888 Mon Sep 17 00:00:00 2001
From: Luke Parker <10430890+Hona@users.noreply.github.com>
Date: Tue, 24 Feb 2026 23:10:10 +1000
Subject: [PATCH] fix(win32): add 50ms tolerance for NTFS mtime fuzziness in
 FileTime assert (#14907)

---
 packages/opencode/src/file/time.ts | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/packages/opencode/src/file/time.ts b/packages/opencode/src/file/time.ts
index c85781eb4..efb1c4376 100644
--- a/packages/opencode/src/file/time.ts
+++ b/packages/opencode/src/file/time.ts
@@ -61,7 +61,8 @@ export namespace FileTime {
     const time = get(sessionID, filepath)
     if (!time) throw new Error(`You must read file ${filepath} before overwriting it. Use the Read tool first`)
     const mtime = Filesystem.stat(filepath)?.mtime
-    if (mtime && mtime.getTime() > time.getTime()) {
+    // Allow a 50ms tolerance for Windows NTFS timestamp fuzziness / async flushing
+    if (mtime && mtime.getTime() > time.getTime() + 50) {
       throw new Error(
         `File ${filepath} has been modified since it was last read.\nLast modification: ${mtime.toISOString()}\nLast read: ${time.toISOString()}\n\nPlease read the file again before modifying it.`,
       )