diff --git a/Qrakhen.Qamp.Core/Benchmark.cs b/Qrakhen.Qamp.Core/Benchmark.cs
index 5b3797d..9d208a3 100644
--- a/Qrakhen.Qamp.Core/Benchmark.cs
+++ b/Qrakhen.Qamp.Core/Benchmark.cs
@@ -33,14 +33,14 @@ public static class Benchmark
 
       if (!_clocks.TryGetValue(key, out Stopwatch? sw)) {
          sw = _clocks[key] = new Stopwatch();
-         IO.Console.Write($" ::: Registered new benchmark clock '{key}'\n");
+         IO.Console.Write($" ::: Registered new benchmark clock '{key}'");
       }
 
       if (!string.IsNullOrEmpty(message))
-         IO.Console.Write($" ::: {key}:{line} > {message}\n");
+         IO.Console.Write($" ::: {key}:{line} > {message}");
 
       if (sw.IsRunning)
-         IO.Console.Write($" ::: {key}:{line} > already running with an elapsed time of {sw.Elapsed}. clock was reset.\n");
+         IO.Console.Write($" ::: {key}:{line} > already running with an elapsed time of {sw.Elapsed}. clock was reset.");
 
       sw.Reset();
       sw.Start();
diff --git a/Qrakhen.Qamp.Core/Console.cs b/Qrakhen.Qamp.Core/Console.cs
index 46f90fa..04b1bb3 100644
--- a/Qrakhen.Qamp.Core/Console.cs
+++ b/Qrakhen.Qamp.Core/Console.cs
@@ -1,20 +1,61 @@
-namespace Qrakhen.Qamp.Core.IO;
+using static System.Runtime.InteropServices.JavaScript.JSType;
+
+namespace Qrakhen.Qamp.Core.IO;
 
 public static class Console
 {
-   // TEMP
-   public static Action<string>? StdOut;
-   // TEMP
+   public static OutputStreamMessageHandler StdOut;
+   public static ErrorStreamMessageHandler StdErr;
+   public static InputStreamListenHandler StdIn;
+   public static MessageFormatter Formatter;
 
-   public static void Write(object? any)
+   static Console()
    {
-      string[] split = $"{any ?? "null"}".Split('\n');
-      for (int i = 0; i < split.Length; i++) {
-         string line = (i == 0 ? " :> " : "    ") + $"{split[i]}\n";
-         if (StdOut == null)
-            System.Console.Write(line);
-         else
-            StdOut(line);
-      }
+      StdOut = System.Console.Out.WriteLine;
+      StdErr = System.Console.Error.WriteLine;
+      StdIn = System.Console.In.ReadLine;
+      Formatter = (p) => {
+         if (p.Length == 0)
+            return [];
+         return p
+                  .Select(v => $"{v}".Split('\n'))
+                  .Select(v => string.Join($"\n :> ", v))
+                  .Select(v => $" :> {v}")
+                  .ToArray();
+      };
    }
-}
\ No newline at end of file
+
+   public static void Write(params object[] parameters)
+   {
+      if (StdOut == null)
+         return;
+
+      var lines = Formatter(parameters);
+      foreach (var line in lines)
+         StdOut(line);
+   }
+
+   public static string? Read()
+   {
+      if (StdIn == null)
+         throw new InvalidOperationException($"No stdin provided, can not read input stream.");
+
+      return StdIn();
+   }
+
+   public static void Error(params object[] parameters)
+   {
+      if (StdErr == null)
+         Write(parameters);
+
+      var lines = Formatter(parameters);
+      foreach (var line in lines)
+         StdErr(line);
+   }
+}
+
+public delegate string? InputStreamListenHandler();
+public delegate void OutputStreamMessageHandler(string? message);
+public delegate void ErrorStreamMessageHandler(string? message);
+
+public delegate string[] MessageFormatter(params object[] parameters);
\ No newline at end of file
diff --git a/Qrakhen.Qamp.Core/Execution/Runner.cs b/Qrakhen.Qamp.Core/Execution/Runner.cs
index 5bc2d68..68e7cb7 100644
--- a/Qrakhen.Qamp.Core/Execution/Runner.cs
+++ b/Qrakhen.Qamp.Core/Execution/Runner.cs
@@ -48,7 +48,8 @@ public class Runner : IDisposable
       Options = options;
       Calls = new StackLike<Call>(options.MaxCalls);
       Stack = new StackLike<Value>(options.InitialStackSize);
-      IO.Console.StdOut = options.StdOut;
+      IO.Console.StdOut ??= options.StdOut;
+      IO.Console.StdIn ??= options.StdIn;
    }
 
    public ExecutionResult Run(Stream stream)
@@ -62,15 +63,20 @@ public class Runner : IDisposable
 #endif
          Stack = new StackLike<Value>(Options.InitialStackSize);
       }
+      Benchmark.Start($"Compile Start");
       using Reader reader = new Reader(stream);
       Compilation.Digester digester = new(reader);
       Function function = digester.Digest();
+      Benchmark.End($"Compile End");
       if (stream.Length > 64)
          File.WriteAllBytes($"./func.{DateTime.Now:yyyyMMdd_HHmmss}.sqi", function.Serialize(true));
       Context closure = new Context(function);
       Push(Obj.Create(closure));
       Invoke(closure, 0);
-      return Execute();
+      Benchmark.Start($"Execution Start");
+      ExecutionResult result = Execute();
+      Benchmark.End($"Execution End");
+      return result;
    }
 
    private bool TestFlag(Op code, Op flag) => (code & Op.F_Mask) == flag;
@@ -681,14 +687,14 @@ public enum ExecutionResult
 }
 
 public readonly struct Options(
-   Action<string>? stdOut = null,
-   Action<string>? stdIn = null,
+   IO.OutputStreamMessageHandler stdOut = null,
+   IO.InputStreamListenHandler stdIn = null,
    int maxCalls = 0x100,
    int stackSize = 0x200,
    int initialStackSize = 0x80)
 {
-   public readonly Action<string>? StdOut = stdOut;
-   public readonly Action<string>? StdIn = stdIn;
+   public readonly IO.OutputStreamMessageHandler StdOut = stdOut;
+   public readonly IO.InputStreamListenHandler StdIn = stdIn;
    public readonly int MaxCalls = maxCalls;
    public readonly int StackSize = stackSize;
    public readonly int InitialStackSize = initialStackSize;