diff --git a/Directory.Packages.props b/Directory.Packages.props
index 8d71bbaa..3ae076f0 100644
--- a/Directory.Packages.props
+++ b/Directory.Packages.props
@@ -3,7 +3,7 @@
 		<CentralPackageTransitivePinningEnabled>true</CentralPackageTransitivePinningEnabled>
 		<RoslynVersion>5.9.0</RoslynVersion>
 		<TUnitVersion>1.67.0</TUnitVersion>
-		<PurviewSGFVersion>1.0.0-prerelease.53</PurviewSGFVersion>
+		<PurviewSGFVersion>1.0.0-prerelease.54</PurviewSGFVersion>
 		<DotnetRuntimeVersion>10.0.12</DotnetRuntimeVersion>
 		<MSExtensionVersion>10.10.0</MSExtensionVersion>
 		<OpenTelemetryVersion>1.18.0</OpenTelemetryVersion>
diff --git a/package.json b/package.json
index abc5ad6f..ca24d47d 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "purview-telemetry-sourcegenerator",
-  "version": "5.0.0-prerelease.18",
+  "version": "5.0.0-prerelease.19",
   "description": "Generates [`ActivitySource`](https://learn.microsoft.com/en-us/dotnet/api/system.diagnostics.activitysource), [`ILogger`](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.logging.ilogger), and [`Metrics`](https://learn.microsoft.com/en-us/dotnet/api/system.diagnostics.metrics) based on interface methods.",
   "license": "MIT",
   "readme": "README.md",
diff --git a/src/src/SourceGenerator/Records/GenericRecords.cs b/src/src/SourceGenerator/Records/GenericRecords.cs
index 3435f82b..9b8c9ca2 100644
--- a/src/src/SourceGenerator/Records/GenericRecords.cs
+++ b/src/src/SourceGenerator/Records/GenericRecords.cs
@@ -45,7 +45,12 @@ public readonly void Validate()
 			throw new Exception("Destructure and Stringify cannot both be true.");
 	}
 
-	public static EquatableArray<MessageTemplateHole> FromMatches(MatchCollection matches)
+	/// <summary>
+	/// Projects the regex matches into the hole records. Internal because the returned
+	/// <c>EquatableArray</c> is a framework type the merge internalizes in the shipped analyzer (seen by
+	/// <c>PSGFR41</c>); the BuildSdk grants the test assemblies access to internals.
+	/// </summary>
+	internal static EquatableArray<MessageTemplateHole> FromMatches(MatchCollection matches)
 	{
 		List<MessageTemplateHole>? holes = null;
 		if (matches != null)
diff --git a/src/src/SourceGenerator/Records/TelemetryCapabilities.cs b/src/src/SourceGenerator/Records/TelemetryCapabilities.cs
index 6f0300c7..3b537260 100644
--- a/src/src/SourceGenerator/Records/TelemetryCapabilities.cs
+++ b/src/src/SourceGenerator/Records/TelemetryCapabilities.cs
@@ -3,7 +3,12 @@ namespace Purview.Telemetry.SourceGenerator.Records;
 /// <summary>
 /// Capabilities detected for the current compilation.
 /// </summary>
-public sealed record TelemetryCapabilities(
+/// <remarks>
+/// Internal because it implements a <c>Purview.SourceGeneratorFramework</c> interface, which the merge
+/// internalizes in the shipped analyzer (seen by <c>PSGFR41</c>); the BuildSdk grants the test
+/// assemblies access to internals.
+/// </remarks>
+sealed record TelemetryCapabilities(
 	//bool SupportsNullableAnnotations,
 	bool SupportsIMeterFactory
 ) : IGenerationCapabilities;