From b30ad1af2e97f5c358271dfb478fe8f35aef2463 Mon Sep 17 00:00:00 2001
From: coofly <coofly@gmail.com>
Date: Mon, 2 Feb 2026 05:20:57 +0800
Subject: [PATCH] fix: strip UNC prefix from path on Windows to fix daemon
 startup

On Windows, canonicalize() returns UNC path format (\?\C:\Users\...).
When the CLI passes this path to Node.js to start the daemon, Node.js
cannot correctly handle the UNC path format, causing "Daemon failed to
start" error. This fix strips the UNC prefix before passing the path.
---
 cli/src/connection.rs | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/cli/src/connection.rs b/cli/src/connection.rs
index 320fc0b5..e0d199da 100644
--- a/cli/src/connection.rs
+++ b/cli/src/connection.rs
@@ -12,6 +12,18 @@ use std::time::Duration;
 #[cfg(unix)]
 use std::os::unix::net::UnixStream;
 
+/// Strip Windows UNC prefix (\\?\) from path.
+/// canonicalize() on Windows returns UNC paths which Node.js cannot handle.
+#[cfg(windows)]
+fn strip_unc_prefix(path: PathBuf) -> PathBuf {
+    let s = path.to_string_lossy();
+    if s.starts_with("\\\\?\\") {
+        PathBuf::from(&s[4..])
+    } else {
+        path
+    }
+}
+
 #[derive(Serialize)]
 #[allow(dead_code)]
 pub struct Request {
@@ -242,6 +254,9 @@ pub fn ensure_daemon(
     let exe_path = env::current_exe().map_err(|e| e.to_string())?;
     // Canonicalize to resolve symlinks (e.g., npm global bin symlink -> actual binary)
     let exe_path = exe_path.canonicalize().unwrap_or(exe_path);
+    // Strip UNC prefix on Windows (Node.js cannot handle \\?\ paths)
+    #[cfg(windows)]
+    let exe_path = strip_unc_prefix(exe_path);
     let exe_dir = exe_path.parent().unwrap();
 
     let mut daemon_paths = vec![
@@ -685,4 +700,17 @@ mod tests {
         assert!(!is_transient_error("Permission denied"));
         assert!(!is_transient_error("Daemon not found"));
     }
+
+    #[cfg(windows)]
+    #[test]
+    fn test_strip_unc_prefix() {
+        assert_eq!(
+            strip_unc_prefix(PathBuf::from("\\\\?\\C:\\Users\\test")),
+            PathBuf::from("C:\\Users\\test")
+        );
+        assert_eq!(
+            strip_unc_prefix(PathBuf::from("C:\\Users\\test")),
+            PathBuf::from("C:\\Users\\test")
+        );
+    }
 }