Utilize the AddToHistory delegate from PSRL proxy

src/PowerShellEditorServices/Services/PowerShell/Console/IReadLine.cs

@@ -9,5 +9,7 @@ namespace Microsoft.PowerShell.EditorServices.Services.PowerShell.Console
     internal interface IReadLine
     {
         string ReadLine(CancellationToken cancellationToken);
+
+        void AddToHistory(string historyEntry);
     }
 }

src/PowerShellEditorServices/Services/PowerShell/Console/PsrlReadLine.cs

@@ -38,6 +38,8 @@ public override string ReadLine(CancellationToken cancellationToken) => _psesHos
             InvokePSReadLine,
             cancellationToken);
 
+        public override void AddToHistory(string historyEntry) => _psrlProxy.AddToHistory(historyEntry);
+
         protected override ConsoleKeyInfo ReadKey(CancellationToken cancellationToken) => _psesHost.ReadKey(intercept: true, cancellationToken);
 
         private string InvokePSReadLine(CancellationToken cancellationToken)

src/PowerShellEditorServices/Services/PowerShell/Console/TerminalReadLine.cs

@@ -9,6 +9,12 @@ namespace Microsoft.PowerShell.EditorServices.Services.PowerShell.Console
 
     internal abstract class TerminalReadLine : IReadLine
     {
+        public virtual void AddToHistory(string historyEntry)
+        {
+            // No-op by default. If the ReadLine provider is not PSRL then history is automatically
+            // added as part of the invocation process.
+        }
+
         public abstract string ReadLine(CancellationToken cancellationToken);
 
         protected abstract ConsoleKeyInfo ReadKey(CancellationToken cancellationToken);

src/PowerShellEditorServices/Services/PowerShell/Execution/ExecutionOptions.cs

@@ -34,5 +34,6 @@ public record PowerShellExecutionOptions : ExecutionOptions
         public bool WriteInputToHost { get; init; }
         public bool ThrowOnError { get; init; } = true;
         public bool AddToHistory { get; init; }
+        internal bool FromRepl { get; init; }
     }
 }

src/PowerShellEditorServices/Services/PowerShell/Execution/SynchronousPowerShellTask.cs

@@ -95,6 +95,7 @@ private static bool IsPromptCommand(PSCommand command)
         private IReadOnlyList<TResult> ExecuteNormally(CancellationToken cancellationToken)
         {
             _frame = _psesHost.CurrentFrame;
+            MaybeAddToHistory(_psCommand);
             if (PowerShellExecutionOptions.WriteOutputToHost)
             {
                 _psCommand.AddOutputCommand();
@@ -187,6 +188,7 @@ private IReadOnlyList<TResult> ExecuteInDebugger(CancellationToken cancellationT
             cancellationToken.Register(CancelDebugExecution);
 
             PSDataCollection<PSObject> outputCollection = new();
+            MaybeAddToHistory(_psCommand);
 
             // Out-Default doesn't work as needed in the debugger
             // Instead we add Out-String to the command and collect results in a PSDataCollection
@@ -353,6 +355,33 @@ private void CancelNormalExecution()
             }
         }
 
+        private void MaybeAddToHistory(PSCommand command)
+        {
+            // Do not add PSES internal commands to history. Also exclude input that came from the
+            // REPL (e.g. PSReadLine) as it handles history itself in that scenario.
+            if (PowerShellExecutionOptions is { AddToHistory: false } or { FromRepl: true })
+            {
+                return;
+            }
+
+            // Only add pure script commands with no arguments to interactive history.
+            if (command.Commands is { Count: not 1 }
+                || command.Commands[0] is { Parameters.Count: not 0 } or { IsScript: false })
+            {
+                return;
+            }
+
+            try
+            {
+                _psesHost.AddToHistory(command.Commands[0].CommandText);
+            }
+            catch
+            {
+                // Ignore exceptions as the user can register a scriptblock predicate that
+                // determines if the command should be added to history.
+            }
+        }
+
         private void CancelDebugExecution()
         {
             if (_pwsh.Runspace.RunspaceStateInfo.IsUsable())

src/PowerShellEditorServices/Services/PowerShell/Host/PsesInternalHost.cs

@@ -446,6 +446,8 @@ public void InvokePSDelegate(string representation, ExecutionOptions executionOp
             task.ExecuteAndGetResult(cancellationToken);
         }
 
+        internal void AddToHistory(string historyEntry) => _readLineProvider.ReadLine.AddToHistory(historyEntry);
+
         internal Task LoadHostProfilesAsync(CancellationToken cancellationToken)
         {
             // NOTE: This is a special task run on startup!
@@ -918,7 +920,8 @@ private void InvokeInput(string input, CancellationToken cancellationToken)
                 {
                     AddToHistory = true,
                     ThrowOnError = false,
-                    WriteOutputToHost = true
+                    WriteOutputToHost = true,
+                    FromRepl = true,
                 },
                 cancellationToken);
         }