Fix AnsiProcess encoding to not include BOM mark

StabilityMatrix.Core/Processes/AnsiProcess.cs

@@ -10,22 +10,22 @@ public class AnsiProcess : Process
 {
     private AsyncStreamReader? stdoutReader;
     private AsyncStreamReader? stderrReader;
-    
+
     public AnsiProcess(ProcessStartInfo startInfo)
     {
         StartInfo = startInfo;
         EnableRaisingEvents = false;
-        
+
         StartInfo.UseShellExecute = false;
         StartInfo.CreateNoWindow = true;
         StartInfo.RedirectStandardOutput = true;
         StartInfo.RedirectStandardInput = true;
         StartInfo.RedirectStandardError = true;
-        
+
         // Need this to parse ANSI escape sequences correctly
-        StartInfo.StandardOutputEncoding = Encoding.UTF8;
-        StartInfo.StandardErrorEncoding = Encoding.UTF8;
-        StartInfo.StandardInputEncoding = Encoding.UTF8;
+        StartInfo.StandardOutputEncoding = new UTF8Encoding(false);
+        StartInfo.StandardErrorEncoding = new UTF8Encoding(false);
+        StartInfo.StandardInputEncoding = new UTF8Encoding(false);
     }
 
     /// <summary>
@@ -35,23 +35,33 @@ public class AnsiProcess : Process
     public void BeginAnsiRead(Action<ProcessOutput> callback)
     {
         var stdoutStream = StandardOutput.BaseStream;
-        stdoutReader = new AsyncStreamReader(stdoutStream, s =>
-        {
-            if (s == null) return;
-            callback(ProcessOutput.FromStdOutLine(s));
-        }, StandardOutput.CurrentEncoding);
-        
+        stdoutReader = new AsyncStreamReader(
+            stdoutStream,
+            s =>
+            {
+                if (s == null)
+                    return;
+                callback(ProcessOutput.FromStdOutLine(s));
+            },
+            StandardOutput.CurrentEncoding
+        );
+
         var stderrStream = StandardError.BaseStream;
-        stderrReader = new AsyncStreamReader(stderrStream, s =>
-        {
-            if (s == null) return;
-            callback(ProcessOutput.FromStdErrLine(s));
-        }, StandardError.CurrentEncoding);
+        stderrReader = new AsyncStreamReader(
+            stderrStream,
+            s =>
+            {
+                if (s == null)
+                    return;
+                callback(ProcessOutput.FromStdErrLine(s));
+            },
+            StandardError.CurrentEncoding
+        );
 
         stdoutReader.BeginReadLine();
         stderrReader.BeginReadLine();
     }
-    
+
     /// <summary>
     /// Waits for output readers to finish
     /// </summary>