Example of how a partial success/failure command result would look.

src/Api/Utilities/CommandResultExtensions.cs

@@ -12,7 +12,7 @@ public static class CommandResultExtensions
             NoRecordFoundFailure<T> failure => new ObjectResult(failure.ErrorMessages) { StatusCode = StatusCodes.Status404NotFound },
             BadRequestFailure<T> failure => new ObjectResult(failure.ErrorMessages) { StatusCode = StatusCodes.Status400BadRequest },
             Failure<T> failure => new ObjectResult(failure.ErrorMessages) { StatusCode = StatusCodes.Status400BadRequest },
-            Success<T> success => new ObjectResult(success.Data) { StatusCode = StatusCodes.Status200OK },
+            Success<T> success => new ObjectResult(success.Value) { StatusCode = StatusCodes.Status200OK },
             _ => throw new InvalidOperationException($"Unhandled commandResult type: {commandResult.GetType().Name}")
         };
     }

src/Core/Models/Commands/CommandResult.cs

@@ -9,7 +9,6 @@ public class CommandResult(IEnumerable<string> errors)
     public bool Success => ErrorMessages.Count == 0;
     public bool HasErrors => ErrorMessages.Count > 0;
     public List<string> ErrorMessages { get; } = errors.ToList();
-
     public CommandResult() : this(Array.Empty<string>()) { }
 }
 
@@ -29,22 +28,51 @@ public class Success : CommandResult
 {
 }
 
-public abstract class CommandResult<T>
-{
+public abstract class CommandResult<T>;
 
+public class Success<T>(T value) : CommandResult<T>
+{
+    public T Value { get; } = value;
 }
 
-public class Success<T>(T data) : CommandResult<T>
+public class Failure<T>(IEnumerable<string> errorMessages) : CommandResult<T>
 {
-    public T? Data { get; init; } = data;
+    public List<string> ErrorMessages { get; } = errorMessages.ToList();
+
+    public string ErrorMessage => string.Join(" ", ErrorMessages);
+
+    public Failure(string error) : this([error]) { }
 }
 
-public class Failure<T>(IEnumerable<string> errorMessage) : CommandResult<T>
+public class Partial<T> : CommandResult<T>
 {
-    public IEnumerable<string> ErrorMessages { get; init; } = errorMessage;
+    public T[] Successes { get; set; } = [];
+    public Error<T>[] Failures { get; set; } = [];
 
-    public Failure(string errorMessage) : this(new[] { errorMessage })
+    public Partial(IEnumerable<T> successfulItems, IEnumerable<Error<T>> failedItems)
     {
+
     }
 }
 
+public record Error<T>(string Message, T ErroredValue);
+
+public record RecordNotFoundError<T>(string Message, T ErroredValue) : Error<T>(Message, ErroredValue)
+{
+    public const string Code = "Record Not Found";
+
+    public RecordNotFoundError(T ErroredValue) : this(Code, ErroredValue)
+    {
+
+    }
+}
+
+public record InsufficientPermissionsError<T>(string Message, T ErroredValue) : Error<T>(Message, ErroredValue)
+{
+    public const string Code = "Insufficient Permissions";
+
+    public InsufficientPermissionsError(T ErroredValue) : this(Code, ErroredValue)
+    {
+
+    }
+}

test/Core.Test/Models/Commands/CommandResultTests.cs

@@ -0,0 +1,46 @@
+using Bit.Core.Models.Commands;
+using Bit.Test.Common.AutoFixture.Attributes;
+using Xunit;
+
+namespace Bit.Core.Test.Models.Commands;
+
+public class CommandResultTests
+{
+    public class TestItem
+    {
+        public Guid Id { get; set; }
+        public string Value { get; set; }
+    }
+
+    public CommandResult<TestItem> BulkAction(IEnumerable<TestItem> items)
+    {
+        var itemList = items.ToList();
+        var successfulItems = items.Where(x => x.Value == "SuccessfulRequest").ToArray();
+
+        var failedItems = itemList.Except(successfulItems).ToArray();
+
+        var notFound = failedItems.First(x => x.Value == "Failed due to not found");
+        var invalidPermissions = failedItems.First(x => x.Value == "Failed due to invalid permissions");
+
+        var notFoundError = new RecordNotFoundError<TestItem>(notFound);
+        var insufficientPermissionsError = new InsufficientPermissionsError<TestItem>(invalidPermissions);
+
+        return new Partial<TestItem>(successfulItems.ToArray(), [notFoundError, insufficientPermissionsError]);
+    }
+
+    [Theory]
+    [BitAutoData]
+    public void Partial_CommandResult_BulkRequestWithSuccessAndFailures(Guid successId1, Guid failureId1, Guid failureId2)
+    {
+        var listOfRecords = new List<TestItem>
+        {
+            new TestItem() { Id = successId1, Value = "SuccessfulRequest" },
+            new TestItem() { Id = failureId1, Value = "Failed due to not found" },
+            new TestItem() { Id = failureId2, Value = "Failed due to invalid permissions" }
+        };
+
+        var result = BulkAction(listOfRecords);
+
+        Assert.IsType<Partial<TestItem>>(listOfRecords);
+    }
+}