Generated the JSON contracts of visual briefings and model answers at compile time (#1151)

app/MindWork AI Studio/Assistants/VisualBriefing/VisualBriefingPersistenceJsonContext.cs

@@ -0,0 +1,19 @@
+using System.Text.Json.Serialization;
+
+namespace AIStudio.Assistants.VisualBriefing;
+
+/// <summary>
+/// The contracts with which System.Text.Json reads and writes the files of visual briefings, built at compile time.
+/// </summary>
+[JsonSourceGenerationOptions(GenerationMode = JsonSourceGenerationMode.Metadata)]
+[JsonSerializable(typeof(VisualBriefingManifest))]
+[JsonSerializable(typeof(VisualBriefingEvidenceArtifact))]
+[JsonSerializable(typeof(VisualBriefingPlanArtifact))]
+[JsonSerializable(typeof(VisualBriefingContentArtifact))]
+[JsonSerializable(typeof(VisualBriefingPresentationArtifact))]
+[JsonSerializable(typeof(VisualBriefingBuildRecord))]
+[JsonSerializable(typeof(VisualBriefingOperationDiagnostics))]
+
+// The briefing selected last:
+[JsonSerializable(typeof(Guid?))]
+internal sealed partial class VisualBriefingPersistenceJsonContext : JsonSerializerContext;