From 9192ff8416bfd5e50a1f3b4c5536caa87f149351 Mon Sep 17 00:00:00 2001
From: Vincent Koc <vincentkoc@ieee.org>
Date: Sat, 20 Jun 2026 06:26:00 +0200
Subject: [PATCH] fix(scripts): write Windows markers without BOM

---
 scripts/e2e/parallels/guest-transports.ts       | 13 ++++++++-----
 test/scripts/parallels-npm-update-smoke.test.ts | 15 ++++++++++++++-
 2 files changed, 22 insertions(+), 6 deletions(-)

diff --git a/scripts/e2e/parallels/guest-transports.ts b/scripts/e2e/parallels/guest-transports.ts
index d434ffd41290..80525e6c63cb 100644
--- a/scripts/e2e/parallels/guest-transports.ts
+++ b/scripts/e2e/parallels/guest-transports.ts
@@ -99,7 +99,10 @@ $scriptPath = "$base.ps1"
 $logPath = "$base.log"
 $donePath = "$base.done"
 $exitPath = "$base.exit"
-$pidPath = "$base.pid"`;
+$pidPath = "$base.pid"
+function Write-OpenClawUtf8File([string]$Path, [string]$Value) {
+  [System.IO.File]::WriteAllText($Path, $Value, [System.Text.UTF8Encoding]::new($false))
+}`;
   const payload = `$ErrorActionPreference = 'Stop'
 $PSNativeCommandUseErrorActionPreference = $false
 ${pathsScript}
@@ -120,12 +123,12 @@ try {
   & {
 ${options.script}
   } *>&1 | Add-OpenClawBackgroundLog
-  Set-Content -Path $exitPath -Value '0' -Encoding UTF8
+  Write-OpenClawUtf8File $exitPath '0'
 } catch {
   $_ | Add-OpenClawBackgroundLog
-  Set-Content -Path $exitPath -Value '1' -Encoding UTF8
+  Write-OpenClawUtf8File $exitPath '1'
 } finally {
-  Set-Content -Path $donePath -Value 'done' -Encoding UTF8
+  Write-OpenClawUtf8File $donePath 'done'
 }`;
   const writeScript = runCommand(
     "prlctl",
@@ -172,7 +175,7 @@ if (!(Test-Path $scriptPath)) { throw "${safeLabel} background script was not wr
           "-EncodedCommand",
           encodePowerShell(`${pathsScript}
 $process = Start-Process -FilePath powershell.exe -WindowStyle Hidden -ArgumentList @('-NoProfile', '-ExecutionPolicy', 'Bypass', '-File', $scriptPath) -PassThru
-Set-Content -Path $pidPath -Value $process.Id -Encoding UTF8
+Write-OpenClawUtf8File $pidPath ([string]$process.Id)
 'started'`),
         ],
         { check: false, quiet: true, timeoutMs: timeoutBefore(deadline, 30_000) },
diff --git a/test/scripts/parallels-npm-update-smoke.test.ts b/test/scripts/parallels-npm-update-smoke.test.ts
index e59e3014150b..528fdf7d3baa 100644
--- a/test/scripts/parallels-npm-update-smoke.test.ts
+++ b/test/scripts/parallels-npm-update-smoke.test.ts
@@ -423,9 +423,13 @@ exit 1
 
   it("cleans timed-out Windows background work and reads bounded log chunks", async () => {
     const decodedCommands: string[] = [];
-    const fakeRun: typeof hostCommandRun = (_command, args) => {
+    const inputs: string[] = [];
+    const fakeRun: typeof hostCommandRun = (_command, args, options) => {
       const decoded = decodePowerShellFromArgs(args);
       decodedCommands.push(decoded);
+      if (options?.input) {
+        inputs.push(String(options.input));
+      }
       if (decoded.includes("Start-Process")) {
         return { status: 0, stderr: "", stdout: "started\n" };
       }
@@ -445,7 +449,13 @@ exit 1
     ).rejects.toThrow("windows background timeout timed out");
 
     const commands = decodedCommands.join("\n---\n");
+    const payloads = inputs.join("\n---\n");
     expect(commands).toContain("$pidPath");
+    expect(commands).toContain("function Write-OpenClawUtf8File");
+    expect(commands).toContain("[System.Text.UTF8Encoding]::new($false)");
+    expect(payloads).toContain("Write-OpenClawUtf8File $exitPath '0'");
+    expect(payloads).toContain("Write-OpenClawUtf8File $donePath 'done'");
+    expect(commands).toContain("Write-OpenClawUtf8File $pidPath ([string]$process.Id)");
     expect(commands).toContain("Start-Process -FilePath powershell.exe");
     expect(commands).toContain("-PassThru");
     expect(commands).toContain("[System.IO.File]::Open($logPath");
@@ -457,6 +467,9 @@ exit 1
     expect(commands).toContain(
       "Remove-Item -Path $scriptPath, $logPath, $donePath, $exitPath, $pidPath",
     );
+    expect(`${commands}\n${payloads}`).not.toContain("Set-Content -Path $exitPath");
+    expect(`${commands}\n${payloads}`).not.toContain("Set-Content -Path $donePath");
+    expect(commands).not.toContain("Set-Content -Path $pidPath");
     expect(commands).not.toContain("ReadAllBytes");
   });