diff --git a/dev/Common/TerminalVelocityFeatures-PackageManager.h b/dev/Common/TerminalVelocityFeatures-PackageManager.h
index 99edf97bbd..8d19e4fef4 100644
--- a/dev/Common/TerminalVelocityFeatures-PackageManager.h
+++ b/dev/Common/TerminalVelocityFeatures-PackageManager.h
@@ -10,11 +10,13 @@
 namespace features
 {
     feature_name Feature_PackageManager = { DisabledByDefault, FALSE };
+    feature_name Feature_PackageValidator = { DisabledByDefault, FALSE };
 }
 #endif // defined(__midlrt)
 
 // Feature constants
 #define WINDOWSAPPRUNTIME_MICROSOFT_WINDOWS_MANAGEMENT_DEPLOYMENT_FEATURE_PACKAGEMANAGER_ENABLED 1
+#define WINDOWSAPPRUNTIME_MICROSOFT_WINDOWS_MANAGEMENT_DEPLOYMENT_FEATURE_PACKAGEVALIDATOR_ENABLED 1
 
 #if defined(__cplusplus)
 
@@ -27,6 +29,12 @@ struct Feature_PackageManager
     static constexpr bool IsEnabled() { return WINDOWSAPPRUNTIME_MICROSOFT_WINDOWS_MANAGEMENT_DEPLOYMENT_FEATURE_PACKAGEMANAGER_ENABLED == 1; }
 };
 
+__pragma(detect_mismatch("ODR_violation_WINDOWSAPPRUNTIME_MICROSOFT_WINDOWS_MANAGEMENT_DEPLOYMENT_FEATURE_PACKAGEVALIDATOR_ENABLED_mismatch", "AlwaysEnabled"))
+struct Feature_PackageValidator
+{
+    static constexpr bool IsEnabled() { return WINDOWSAPPRUNTIME_MICROSOFT_WINDOWS_MANAGEMENT_DEPLOYMENT_FEATURE_PACKAGEVALIDATOR_ENABLED == 1; }
+};
+
 } // namespace Microsoft.Windows.Management.Deployment
 
 #endif // defined(__cplusplus)
diff --git a/dev/Common/TerminalVelocityFeatures-PackageManager.xml b/dev/Common/TerminalVelocityFeatures-PackageManager.xml
index 932aa39394..861bb23db6 100644
--- a/dev/Common/TerminalVelocityFeatures-PackageManager.xml
+++ b/dev/Common/TerminalVelocityFeatures-PackageManager.xml
@@ -17,4 +17,13 @@
             <channelToken>Stable</channelToken>
         </alwaysDisabledChannelTokens>
     </feature>
+  <feature>
+    <name>Feature_PackageValidator</name>
+    <description>Package Validator APIs</description>
+    <state>AlwaysEnabled</state>
+    <alwaysDisabledChannelTokens>
+      <channelToken>Preview</channelToken>
+      <channelToken>Stable</channelToken>
+    </alwaysDisabledChannelTokens>
+  </feature>
 </features>
diff --git a/dev/PackageManager/API/PackageManager.idl b/dev/PackageManager/API/PackageManager.idl
index 1a2a0e27b2..6940552fec 100644
--- a/dev/PackageManager/API/PackageManager.idl
+++ b/dev/PackageManager/API/PackageManager.idl
@@ -7,7 +7,7 @@ import "M.AM.DynamicDependency.idl";
 
 namespace Microsoft.Windows.Management.Deployment
 {
-    [contractversion(2)]
+    [contractversion(3)]
     apicontract PackageDeploymentContract{};
 
     /// Features can be queried if currently available/enabled.
@@ -200,6 +200,14 @@ namespace Microsoft.Windows.Management.Deployment
 
         Boolean IsLimitToExistingPackagesSupported { get; };    // Requires Windows >= 10.0.22621.0 (aka Win11 22H2)
         Boolean LimitToExistingPackages;
+
+        [contract(PackageDeploymentContract, 3)]
+        [feature(Feature_PackageValidator)]
+        Boolean IsPackageValidatorsSupported{ get; };           // Requires Windows >= 10.0.26100.0 (aka Win11 24H2)
+
+        [contract(PackageDeploymentContract, 3)]
+        [feature(Feature_PackageValidator)]
+        IVector<PackageValidatorEntry> PackageValidators{ get; };
     }
 
     // Requires Windows >= 10.0.19041.0 (aka 2004 aka 20H1)
@@ -224,6 +232,14 @@ namespace Microsoft.Windows.Management.Deployment
 
         Boolean IsExpectedDigestsSupported { get; };            // Requires Windows >= 10.0.22621.0 (aka Win11 22H2)
         IMap<Windows.Foundation.Uri, String> ExpectedDigests{ get; };
+
+        [contract(PackageDeploymentContract, 3)]
+        [feature(Feature_PackageValidator)]
+        Boolean IsPackageValidatorsSupported{ get; };           // Requires Windows >= 10.0.26100.0 (aka Win11 24H2)
+
+        [contract(PackageDeploymentContract, 3)]
+        [feature(Feature_PackageValidator)]
+        IVector<PackageValidatorEntry> PackageValidators{ get; };
     }
 
     // Requires Windows >= 10.0.19041.0 (aka 2004 aka 20H1)
@@ -525,4 +541,46 @@ namespace Microsoft.Windows.Management.Deployment
         void RemovePackageSet(
             Microsoft.Windows.Management.Deployment.PackageSetRuntimeDisposition packageSetRuntimeDisposition);
     }
+
+    [contract(PackageDeploymentContract, 3)]
+    [feature(Feature_PackageValidator)]
+    [default_interface]
+    runtimeclass AppxPackagingObject
+    {
+        // This is an interop class for COM types defined in AppxPackaging.idl.
+        // The WinRT side has no methods or properties, but the object supports QueryInterface into the COM interfaces 
+        // IAppxPackageReader or IAppxBundleReader, whichever is relevant for the object being read.
+    }
+
+    [contract(PackageDeploymentContract, 3)]
+    [feature(Feature_PackageValidator)]
+    interface IPackageValidator
+    {
+        // One can create custom validators if and when the need arises
+        Boolean IsPackageValid(AppxPackagingObject packagingObject);        
+    }
+
+    [contract(PackageDeploymentContract, 3)]
+    [feature(Feature_PackageValidator)]
+    runtimeclass PackageIdentityValidator : [default] IPackageValidator
+    {
+        PackageIdentityValidator(String expectedPackageFamilyName, Int64 expectedMinimumVersion);
+        Boolean IsPackageValid(AppxPackagingObject packagingObject);
+    }
+
+    [contract(PackageDeploymentContract, 3)]
+    [feature(Feature_PackageValidator)]
+    runtimeclass PackageCertificateEkuValidator : [default] IPackageValidator
+    {
+        PackageCertificateEkuValidator(String expectedCertificateEku);
+        Boolean IsPackageValid(AppxPackagingObject packagingObject);
+    }
+
+    [contract(PackageDeploymentContract, 3)]
+    [feature(Feature_PackageValidator)]
+    runtimeclass PackageValidatorEntry
+    {
+        Windows.Foundation.Uri Uri;
+        IPackageValidator Validator;
+    }
 }