diff --git a/lib/channels/aberr/Aberr.cs b/lib/channels/aberr/Aberr.cs
index cfcd7af3..9bde5ec7 100644
--- a/lib/channels/aberr/Aberr.cs
+++ b/lib/channels/aberr/Aberr.cs
@@ -412,6 +412,7 @@ public sealed class Aberr : ITValuePublisher, IDisposable
     /// <summary>
     /// Output buffers for batch Aberr calculation.
     /// </summary>
+#pragma warning disable MA0077 // ref struct cannot implement interfaces
     [StructLayout(LayoutKind.Auto)]
 #pragma warning disable S1104 // Fields should not have public accessibility
     public readonly ref struct BatchOutputs
@@ -447,10 +448,12 @@ public sealed class Aberr : ITValuePublisher, IDisposable
         public static bool operator ==(BatchOutputs left, BatchOutputs right) => left.Equals(right);
         public static bool operator !=(BatchOutputs left, BatchOutputs right) => !left.Equals(right);
     }
+#pragma warning restore MA0077
 
     /// <summary>
     /// Internal state for scalar calculation.
     /// </summary>
+#pragma warning disable MA0077 // ref struct cannot implement interfaces
     [StructLayout(LayoutKind.Auto)]
     [SuppressMessage("NDepend", "ND1903:StructuresShouldBeImmutable", Justification = "Mutable calculation state accumulator by design")]
     private ref struct ScalarState
@@ -471,10 +474,12 @@ public sealed class Aberr : ITValuePublisher, IDisposable
         public static bool operator ==(ScalarState left, ScalarState right) => left.Equals(right);
         public static bool operator !=(ScalarState left, ScalarState right) => !left.Equals(right);
     }
+#pragma warning restore MA0077
 
     /// <summary>
     /// Working buffers for batch calculation.
     /// </summary>
+#pragma warning disable MA0077 // ref struct cannot implement interfaces
     [StructLayout(LayoutKind.Auto)]
     private readonly ref struct WorkBuffers(Span<double> source, Span<double> deviation)
     {
@@ -492,6 +497,7 @@ public sealed class Aberr : ITValuePublisher, IDisposable
         public static bool operator ==(WorkBuffers left, WorkBuffers right) => left.Equals(right);
         public static bool operator !=(WorkBuffers left, WorkBuffers right) => !left.Equals(right);
     }
+#pragma warning restore MA0077
 
     /// <summary>
     /// Calculates Aberr for the entire TSeries using a new instance.
diff --git a/lib/channels/accbands/AccBands.cs b/lib/channels/accbands/AccBands.cs
index 88438164..1d0576d6 100644
--- a/lib/channels/accbands/AccBands.cs
+++ b/lib/channels/accbands/AccBands.cs
@@ -474,6 +474,7 @@ public sealed class AccBands : ITValuePublisher, IDisposable
     /// Public Span fields are intentional: ref structs cannot use auto-properties with Span&lt;T&gt;
     /// and direct field access provides optimal performance for this high-throughput API.
     /// </remarks>
+#pragma warning disable MA0077 // ref struct cannot implement interfaces
     [StructLayout(LayoutKind.Auto)]
 #pragma warning disable S1104 // Fields should not have public accessibility
     public readonly ref struct BatchOutputs
@@ -509,10 +510,12 @@ public sealed class AccBands : ITValuePublisher, IDisposable
         public static bool operator ==(BatchOutputs left, BatchOutputs right) => left.Equals(right);
         public static bool operator !=(BatchOutputs left, BatchOutputs right) => !left.Equals(right);
     }
+#pragma warning restore MA0077
 
     /// <summary>
     /// Input buffers for batch AccBands calculation.
     /// </summary>
+#pragma warning disable MA0077 // ref struct cannot implement interfaces
     [StructLayout(LayoutKind.Auto)]
 #pragma warning disable S1104 // Fields should not have public accessibility
     public readonly ref struct BatchInputs
@@ -548,10 +551,12 @@ public sealed class AccBands : ITValuePublisher, IDisposable
         public static bool operator ==(BatchInputs left, BatchInputs right) => left.Equals(right);
         public static bool operator !=(BatchInputs left, BatchInputs right) => !left.Equals(right);
     }
+#pragma warning restore MA0077
 
     /// <summary>
     /// Internal state for scalar calculation.
     /// </summary>
+#pragma warning disable MA0077 // ref struct cannot implement interfaces
     [StructLayout(LayoutKind.Auto)]
     [SuppressMessage("NDepend", "ND1903:StructuresShouldBeImmutable", Justification = "Mutable calculation state accumulator by design")]
     private ref struct ScalarState
@@ -576,10 +581,12 @@ public sealed class AccBands : ITValuePublisher, IDisposable
         public static bool operator ==(ScalarState left, ScalarState right) => left.Equals(right);
         public static bool operator !=(ScalarState left, ScalarState right) => !left.Equals(right);
     }
+#pragma warning restore MA0077
 
     /// <summary>
     /// Working buffers for batch calculation.
     /// </summary>
+#pragma warning disable MA0077 // ref struct cannot implement interfaces
     [StructLayout(LayoutKind.Auto)]
     private readonly ref struct WorkBuffers(Span<double> adjHigh, Span<double> adjLow, Span<double> close)
     {
@@ -600,6 +607,7 @@ public sealed class AccBands : ITValuePublisher, IDisposable
         public static bool operator ==(WorkBuffers left, WorkBuffers right) => left.Equals(right);
         public static bool operator !=(WorkBuffers left, WorkBuffers right) => !left.Equals(right);
     }
+#pragma warning restore MA0077
 
     /// <summary>
     /// Calculates AccBands for the entire TBarSeries using a new instance.
diff --git a/lib/channels/apz/Apz.cs b/lib/channels/apz/Apz.cs
index 6c779cfd..a0afa865 100644
--- a/lib/channels/apz/Apz.cs
+++ b/lib/channels/apz/Apz.cs
@@ -411,6 +411,7 @@ public sealed class Apz : ITValuePublisher
     /// <summary>
     /// Output buffers for batch APZ calculation.
     /// </summary>
+#pragma warning disable MA0077 // ref struct cannot implement interfaces
     [StructLayout(LayoutKind.Auto)]
 #pragma warning disable S1104 // Fields should not have public accessibility
     public readonly ref struct BatchOutputs
@@ -446,10 +447,12 @@ public sealed class Apz : ITValuePublisher
         public static bool operator ==(BatchOutputs left, BatchOutputs right) => left.Equals(right);
         public static bool operator !=(BatchOutputs left, BatchOutputs right) => !left.Equals(right);
     }
+#pragma warning restore MA0077
 
     /// <summary>
     /// Internal state for scalar calculation.
     /// </summary>
+#pragma warning disable MA0077 // ref struct cannot implement interfaces
     [StructLayout(LayoutKind.Auto)]
     [SuppressMessage("NDepend", "ND1903:StructuresShouldBeImmutable", Justification = "Mutable calculation state accumulator by design")]
     private ref struct ScalarState
@@ -476,6 +479,7 @@ public sealed class Apz : ITValuePublisher
         public static bool operator ==(ScalarState left, ScalarState right) => left.Equals(right);
         public static bool operator !=(ScalarState left, ScalarState right) => !left.Equals(right);
     }
+#pragma warning restore MA0077
 
     /// <summary>
     /// Calculates APZ for the entire TBarSeries using a new instance.
diff --git a/lib/trends_FIR/wma/Wma.Coverage.Tests.cs b/lib/trends_FIR/wma/Wma.Coverage.Tests.cs
index 3bdcab93..09b9ae2d 100644
--- a/lib/trends_FIR/wma/Wma.Coverage.Tests.cs
+++ b/lib/trends_FIR/wma/Wma.Coverage.Tests.cs
@@ -18,12 +18,12 @@ public class WmaCoverageTests(ITestOutputHelper output)
             source[i] = i;
         }
 
-        double[] output = new double[len];
+        double[] result = new double[len];
 
         // This should trigger CalculateScalarCore internally
-        Wma.Batch(source.AsSpan(), output.AsSpan(), period);
+        Wma.Batch(source.AsSpan(), result.AsSpan(), period);
 
-        Assert.NotEqual(0, output[period]);
+        Assert.NotEqual(0, result[period]);
     }
 
     [Fact]
@@ -94,11 +94,11 @@ public class WmaCoverageTests(ITestOutputHelper output)
             source[i] = i;
         }
 
-        double[] output = new double[len];
+        double[] result = new double[len];
 
-        InvokePrivateStaticMethod_WithSpans("CalculateScalarCore", source, output, period);
+        InvokePrivateStaticMethod_WithSpans("CalculateScalarCore", source, result, period);
 
-        Assert.NotEqual(0, output[period]);
+        Assert.NotEqual(0, result[period]);
     }
 
     private delegate void CoreDelegate(ReadOnlySpan<double> source, Span<double> output, int period);