diff --git a/src/PSRule.Types/Definitions/ResourceHelper.cs b/src/PSRule.Types/Definitions/ResourceHelper.cs
index d56611e438..4815ccf681 100644
--- a/src/PSRule.Types/Definitions/ResourceHelper.cs
+++ b/src/PSRule.Types/Definitions/ResourceHelper.cs
@@ -11,7 +11,7 @@ internal static class ResourceHelper
 
     private const char SCOPE_SEPARATOR = '\\';
 
-    internal const string STANDALONE_SCOPENAME = ".";
+    internal const string STANDALONE_SCOPE_NAME = ".";
 
     internal static string GetIdString(string scope, string name)
     {
@@ -63,7 +63,7 @@ internal static void ParseIdString(string id, out string? scope, out string? nam
 
     internal static ResourceId GetRuleId(string? defaultScope, string name, ResourceIdKind kind)
     {
-        defaultScope ??= STANDALONE_SCOPENAME;
+        defaultScope ??= STANDALONE_SCOPE_NAME;
         return name.IndexOf(SCOPE_SEPARATOR) > 0 ? ResourceId.Parse(name, kind) : new ResourceId(defaultScope, name, kind);
     }
 
@@ -87,6 +87,6 @@ internal static SeverityLevel GetLevel(SeverityLevel? level)
 
     internal static string NormalizeScope(string? scope)
     {
-        return scope == null || string.IsNullOrEmpty(scope) ? STANDALONE_SCOPENAME : scope;
+        return scope == null || string.IsNullOrEmpty(scope) ? STANDALONE_SCOPE_NAME : scope;
     }
 }
diff --git a/src/PSRule.Types/Definitions/ResourceId.cs b/src/PSRule.Types/Definitions/ResourceId.cs
index 593bb0c386..50eafff381 100644
--- a/src/PSRule.Types/Definitions/ResourceId.cs
+++ b/src/PSRule.Types/Definitions/ResourceId.cs
@@ -134,7 +134,7 @@ private static bool TryParse(string id, ResourceIdKind kind, out ResourceId? val
         if (string.IsNullOrEmpty(id) || !TryParse(id, out var scope, out var name) || name == null)
             return false;
 
-        scope ??= ResourceHelper.STANDALONE_SCOPENAME;
+        scope ??= ResourceHelper.STANDALONE_SCOPE_NAME;
         value = new ResourceId(id, scope, name, kind);
         return true;
     }
diff --git a/src/PSRule/Commands/NewRuleDefinitionCommand.cs b/src/PSRule/Commands/NewRuleDefinitionCommand.cs
index 7114b71187..7a1bdb10fe 100644
--- a/src/PSRule/Commands/NewRuleDefinitionCommand.cs
+++ b/src/PSRule/Commands/NewRuleDefinitionCommand.cs
@@ -14,6 +14,7 @@ namespace PSRule.Commands;
 
 /// <summary>
 /// A Rule language block.
+/// When processed, creates a rule language element that can be used later during rule execution.
 /// </summary>
 [Cmdlet(VerbsCommon.New, RuleLanguageNouns.RuleDefinition)]
 internal sealed class NewRuleDefinitionCommand : LanguageBlock
@@ -89,7 +90,7 @@ internal sealed class NewRuleDefinitionCommand : LanguageBlock
     public string[] Alias { get; set; }
 
     /// <summary>
-    /// An optional reference identifer for the resource.
+    /// An optional reference identifier for the resource.
     /// </summary>
     [Parameter(Mandatory = false)]
     [ValidateLength(3, 128)]
diff --git a/src/PSRule/Definitions/ResourceValidator.cs b/src/PSRule/Definitions/ResourceValidator.cs
index 4894cd00a1..4080a81e0c 100644
--- a/src/PSRule/Definitions/ResourceValidator.cs
+++ b/src/PSRule/Definitions/ResourceValidator.cs
@@ -3,8 +3,8 @@
 
 using System.Management.Automation;
 using System.Text.RegularExpressions;
+using PSRule.Pipeline;
 using PSRule.Resources;
-using PSRule.Runtime;
 
 namespace PSRule.Definitions;
 
@@ -22,11 +22,11 @@ internal sealed class ResourceValidator : IResourceValidator
 
     private static readonly Regex ValidName = new("^[^<>:/\\\\|?*\"'`+@._\\-\x00-\x1F][^<>:/\\\\|?*\"'`+@\x00-\x1F]{1,126}[^<>:/\\\\|?*\"'`+@._\\-\x00-\x1F]$", RegexOptions.Compiled, TimeSpan.FromSeconds(5));
 
-    private readonly RunspaceContext _Context;
+    private readonly IPipelineWriter _Writer;
 
-    public ResourceValidator(RunspaceContext context)
+    public ResourceValidator(IPipelineWriter writer)
     {
-        _Context = context;
+        _Writer = writer;
     }
 
     internal static bool IsNameValid(string name)
@@ -74,7 +74,7 @@ private static string ReportExtent(ISourceExtent extent)
 
     private void ReportError(string errorId, string message, params object[] args)
     {
-        if (_Context == null)
+        if (_Writer == null)
             return;
 
         ReportError(new Pipeline.ParseException(
@@ -85,10 +85,10 @@ private void ReportError(string errorId, string message, params object[] args)
 
     private void ReportError(Pipeline.ParseException exception)
     {
-        if (_Context == null)
+        if (_Writer == null)
             return;
 
-        _Context.WriteError(new ErrorRecord(
+        _Writer.WriteError(new ErrorRecord(
             exception: exception,
             errorId: exception.ErrorId,
             errorCategory: ErrorCategory.InvalidOperation,
diff --git a/src/PSRule/Host/HostHelper.cs b/src/PSRule/Host/HostHelper.cs
index 8fa94597cf..f955598458 100644
--- a/src/PSRule/Host/HostHelper.cs
+++ b/src/PSRule/Host/HostHelper.cs
@@ -247,7 +247,7 @@ private static ILanguageBlock[] GetPSLanguageBlocks(RunspaceContext context, Sou
     private static ILanguageBlock[] GetYamlLanguageBlocks(Source[] sources, RunspaceContext context)
     {
         var result = new Collection<ILanguageBlock>();
-        var visitor = new ResourceValidator(context);
+        var visitor = new ResourceValidator(context.Writer);
         var d = new DeserializerBuilder()
             .IgnoreUnmatchedProperties()
             .WithNamingConvention(CamelCaseNamingConvention.Instance)
@@ -313,7 +313,7 @@ private static ILanguageBlock[] GetYamlLanguageBlocks(Source[] sources, Runspace
     private static ILanguageBlock[] GetJsonLanguageBlocks(Source[] sources, RunspaceContext context)
     {
         var result = new Collection<ILanguageBlock>();
-        var visitor = new ResourceValidator(context);
+        var visitor = new ResourceValidator(context.Writer);
         var deserializer = new JsonSerializer
         {
             DateTimeZoneHandling = DateTimeZoneHandling.Utc
diff --git a/src/PSRule/Pipeline/IPipelineReader.cs b/src/PSRule/Pipeline/IPipelineReader.cs
new file mode 100644
index 0000000000..6f367c1ab3
--- /dev/null
+++ b/src/PSRule/Pipeline/IPipelineReader.cs
@@ -0,0 +1,33 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
+using PSRule.Data;
+
+namespace PSRule.Pipeline;
+
+internal interface IPipelineReader
+{
+    int Count { get; }
+
+    bool IsEmpty { get; }
+
+    /// <summary>
+    /// Add a new object into the stream.
+    /// </summary>
+    /// <param name="sourceObject">An object to process.</param>
+    /// <param name="targetType">A pre-bound type.</param>
+    /// <param name="skipExpansion">Determines if expansion is skipped.</param>
+    void Enqueue(object sourceObject, string? targetType = null, bool skipExpansion = false);
+
+    bool TryDequeue(out ITargetObject sourceObject);
+
+    void Open();
+
+    /// <summary>
+    /// Add a path to the list of inputs.
+    /// </summary>
+    /// <param name="path">The path of files to add.</param>
+    void Add(string path);
+}
+
+#nullable restore
diff --git a/src/PSRule/Pipeline/OptionContextBuilder.cs b/src/PSRule/Pipeline/OptionContextBuilder.cs
index 8b26e2495f..d8cc7e5193 100644
--- a/src/PSRule/Pipeline/OptionContextBuilder.cs
+++ b/src/PSRule/Pipeline/OptionContextBuilder.cs
@@ -119,7 +119,7 @@ internal void ModuleConfig(string module, ModuleConfigV1Spec spec)
 
     private static bool ShouldCombine(string languageScope, OptionScope optionScope)
     {
-        return optionScope.LanguageScope == ResourceHelper.STANDALONE_SCOPENAME || optionScope.LanguageScope == languageScope || optionScope.Type == ScopeType.Explicit;
+        return optionScope.LanguageScope == ResourceHelper.STANDALONE_SCOPE_NAME || optionScope.LanguageScope == languageScope || optionScope.Type == ScopeType.Explicit;
     }
 
     /// <summary>
diff --git a/src/PSRule/Pipeline/PipelineContext.cs b/src/PSRule/Pipeline/PipelineContext.cs
index 1e46fa7654..cfbb491be8 100644
--- a/src/PSRule/Pipeline/PipelineContext.cs
+++ b/src/PSRule/Pipeline/PipelineContext.cs
@@ -114,27 +114,6 @@ public string[] SourceContentCache
         }
     }
 
-    internal enum ResourceIssueType
-    {
-        Unknown
-    }
-
-    internal sealed class ResourceIssue
-    {
-        public ResourceIssue(ResourceKind kind, string id, ResourceIssueType issue)
-        {
-            Kind = kind;
-            Id = id;
-            Issue = issue;
-        }
-
-        public ResourceKind Kind { get; }
-
-        public string Id { get; }
-
-        public ResourceIssueType Issue { get; }
-    }
-
     internal Runspace GetRunspace()
     {
         if (_Runspace == null)
diff --git a/src/PSRule/Pipeline/ResourceIssue.cs b/src/PSRule/Pipeline/ResourceIssue.cs
new file mode 100644
index 0000000000..d9ca6c899c
--- /dev/null
+++ b/src/PSRule/Pipeline/ResourceIssue.cs
@@ -0,0 +1,22 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
+using PSRule.Definitions;
+
+namespace PSRule.Pipeline;
+
+internal sealed class ResourceIssue
+{
+    public ResourceIssue(ResourceKind resourceKind, ResourceId resourceId, ResourceIssueType issue)
+    {
+        ResourceKind = resourceKind;
+        ResourceId = resourceId;
+        Issue = issue;
+    }
+
+    public ResourceKind ResourceKind { get; }
+
+    public ResourceId ResourceId { get; }
+
+    public ResourceIssueType Issue { get; }
+}
diff --git a/src/PSRule/Pipeline/ResourceIssueType.cs b/src/PSRule/Pipeline/ResourceIssueType.cs
new file mode 100644
index 0000000000..ba4ee36301
--- /dev/null
+++ b/src/PSRule/Pipeline/ResourceIssueType.cs
@@ -0,0 +1,11 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
+namespace PSRule.Pipeline;
+
+internal enum ResourceIssueType
+{
+    Unknown,
+
+    SuppressionGroupExpired
+}
diff --git a/src/PSRule/Pipeline/TargetBinder.cs b/src/PSRule/Pipeline/TargetBinder.cs
index d26ed9bf04..1aeda6e158 100644
--- a/src/PSRule/Pipeline/TargetBinder.cs
+++ b/src/PSRule/Pipeline/TargetBinder.cs
@@ -72,7 +72,7 @@ public TargetBinderBuilder(BindTargetMethod bindTargetName, BindTargetMethod bin
         _BindTargetName = bindTargetName;
         _BindTargetType = bindTargetType;
         _BindField = bindField;
-        _BindingContext = new List<ITargetBindingContext>();
+        _BindingContext = [];
         if (typeFilter != null && typeFilter.Length > 0)
             _TypeFilter = new HashSet<string>(typeFilter, StringComparer.OrdinalIgnoreCase);
     }
@@ -82,7 +82,7 @@ public TargetBinderBuilder(BindTargetMethod bindTargetName, BindTargetMethod bin
     /// </summary>
     public ITargetBinder Build()
     {
-        return new TargetBinder(_BindingContext.ToArray());
+        return new TargetBinder([.. _BindingContext]);
     }
 
     /// <summary>
@@ -114,8 +114,8 @@ internal sealed class TargetBinder : ITargetBinder
 
     internal TargetBinder(ITargetBindingContext[] bindingContext)
     {
-        _BindingContext = new Dictionary<string, ITargetBindingContext>();
-        _BindingResult = new Dictionary<string, ITargetBindingResult>();
+        _BindingContext = [];
+        _BindingResult = [];
         for (var i = 0; bindingContext != null && i < bindingContext.Length; i++)
             _BindingContext.Add(bindingContext[i].LanguageScope ?? STANDALONE_SCOPE, bindingContext[i]);
     }
diff --git a/src/PSRule/Runtime/ILanguageScope.cs b/src/PSRule/Runtime/ILanguageScope.cs
index fed742553c..50c7907b19 100644
--- a/src/PSRule/Runtime/ILanguageScope.cs
+++ b/src/PSRule/Runtime/ILanguageScope.cs
@@ -7,8 +7,11 @@
 
 namespace PSRule.Runtime;
 
+#nullable enable
+
 /// <summary>
 /// A named scope for language elements.
+/// Any elements in a language scope are not visible to language elements in another scope.
 /// </summary>
 internal interface ILanguageScope : IDisposable
 {
@@ -29,14 +32,17 @@ internal interface ILanguageScope : IDisposable
     /// <summary>
     /// Try to get a specific configuration value by name.
     /// </summary>
-    bool TryConfigurationValue(string key, out object value);
+    bool TryConfigurationValue(string key, out object? value);
 
+    /// <summary>
+    /// Add a filter to the language scope.
+    /// </summary>
     void WithFilter(IResourceFilter resourceFilter);
 
     /// <summary>
     /// Get a filter for a specific resource kind.
     /// </summary>
-    IResourceFilter GetFilter(ResourceKind kind);
+    IResourceFilter? GetFilter(ResourceKind kind);
 
     /// <summary>
     /// Add a service to the scope.
@@ -46,11 +52,22 @@ internal interface ILanguageScope : IDisposable
     /// <summary>
     /// Get a previously added service.
     /// </summary>
-    object GetService(string name);
+    object? GetService(string name);
 
-    bool TryGetType(object o, out string type, out string path);
+    /// <summary>
+    /// Try to bind the type of the object.
+    /// </summary>
+    bool TryGetType(object o, out string? type, out string? path);
 
-    bool TryGetName(object o, out string name, out string path);
+    /// <summary>
+    /// Try to bind the name of the object.
+    /// </summary>
+    bool TryGetName(object o, out string? name, out string? path);
 
-    bool TryGetScope(object o, out string[] scope);
+    /// <summary>
+    /// Try to bind the scope of the object.
+    /// </summary>
+    bool TryGetScope(object o, out string[]? scope);
 }
+
+#nullable restore