Added the reliable exchange with providers, data sources, and search services to the changelog

app/MindWork AI Studio/Provider/Anthropic/AnthropicContentBlockBuilder.cs

@@ -117,8 +117,8 @@ public sealed class AnthropicContentBlockBuilder
             case TYPE_TEXT:
                 return this.BuildFromSeed(new()
                 {
-                    ["type"] = JsonSerializer.Serialize(TYPE_TEXT),
+                    ["type"] = JsonSerializer.Serialize(TYPE_TEXT, ProviderJsonOptions.OPTIONS),
-                    ["text"] = JsonSerializer.Serialize(this.text.ToString()),
+                    ["text"] = JsonSerializer.Serialize(this.text.ToString(), ProviderJsonOptions.OPTIONS),
                 });
             
             case TYPE_THINKING:
@@ -129,9 +129,9 @@ public sealed class AnthropicContentBlockBuilder
                 //
                 return this.BuildFromSeed(new()
                 {
-                    ["type"] = JsonSerializer.Serialize(TYPE_THINKING),
+                    ["type"] = JsonSerializer.Serialize(TYPE_THINKING, ProviderJsonOptions.OPTIONS),
-                    ["thinking"] = JsonSerializer.Serialize(this.thinking.ToString()),
+                    ["thinking"] = JsonSerializer.Serialize(this.thinking.ToString(), ProviderJsonOptions.OPTIONS),
-                    ["signature"] = JsonSerializer.Serialize(this.signature),
+                    ["signature"] = JsonSerializer.Serialize(this.signature, ProviderJsonOptions.OPTIONS),
                 });
             
             case TYPE_TOOL_USE:

app/MindWork AI Studio/Provider/Anthropic/AnthropicMessage.cs

@@ -10,4 +10,12 @@ namespace AIStudio.Provider.Anthropic;
 /// thinking blocks, and the thinking blocks have to return exactly as they arrived — reading and
 /// rebuilding them would risk changing them.
 /// </remarks>
-public sealed record AnthropicMessage(IList<JsonElement> Content, string Role = "assistant") : IMessage<IList<JsonElement>>;
+public sealed record AnthropicMessage(IList<JsonElement> Content, string Role = "assistant") : IMessage<IList<JsonElement>>
+{
+    //
+    // The properties of the parameters, declared again to be settable, as the messages demand it. Keep them in
+    // the order of the parameters, which is the order they get written in:
+    //
+    public IList<JsonElement> Content { get; set; } = Content;
+    public string Role { get; set; } = Role;
+}

app/MindWork AI Studio/Provider/Anthropic/AnthropicMessageStreamAccumulator.cs

@@ -152,9 +152,9 @@ public sealed class AnthropicMessageStreamAccumulator
             this.unparsableToolArguments[builder.ToolUseId] = builder.UnparsableToolArguments;
     }
     
-    private static JsonElement EmptyTextBlock() => JsonSerializer.SerializeToElement(new
+    private static JsonElement EmptyTextBlock()
     {
-        type = "text",
+        using var document = JsonDocument.Parse("""{"type":"text","text":""}""");
-        text = string.Empty,
+        return document.RootElement.Clone();
-    });
+    }
 }

app/MindWork AI Studio/Provider/Anthropic/AnthropicStreamMessage.cs

@@ -14,5 +14,5 @@ public sealed record AnthropicStreamMessage
     /// <summary>
     /// What the request carried, where the stream states it.
     /// </summary>
-    public AnthropicUsage? Usage { get; init; }
+    public AnthropicUsage? Usage { get; set; }
 }

app/MindWork AI Studio/Provider/Anthropic/AnthropicTool.cs

@@ -11,11 +11,11 @@ namespace AIStudio.Provider.Anthropic;
 /// </remarks>
 public sealed record AnthropicTool
 {
-    public string Name { get; init; } = string.Empty;
+    public string Name { get; set; } = string.Empty;
 
-    public string Description { get; init; } = string.Empty;
+    public string Description { get; set; } = string.Empty;
 
-    public bool Strict { get; init; }
+    public bool Strict { get; set; }
 
-    public JsonElement InputSchema { get; init; }
+    public JsonElement InputSchema { get; set; }
 }

app/MindWork AI Studio/Provider/Anthropic/AnthropicToolResultContent.cs

@@ -4,11 +4,11 @@ namespace AIStudio.Provider.Anthropic;
 
 public sealed record AnthropicToolResultContent
 {
-    public string Type { get; init; } = "tool_result";
+    public string Type { get; set; } = "tool_result";
 
-    public string ToolUseId { get; init; } = string.Empty;
+    public string ToolUseId { get; set; } = string.Empty;
 
-    public string Content { get; init; } = string.Empty;
+    public string Content { get; set; } = string.Empty;
 
     /// <summary>
     /// Whether the tool failed rather than returning a result.
@@ -18,5 +18,5 @@ public sealed record AnthropicToolResultContent
     /// result stays byte-identical to what earlier versions sent.
     /// </remarks>
     [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingDefault)]
-    public bool IsError { get; init; }
+    public bool IsError { get; set; }
 }

app/MindWork AI Studio/Provider/Anthropic/AnthropicToolResultMessage.cs

@@ -7,4 +7,12 @@ namespace AIStudio.Provider.Anthropic;
 /// All results of one turn belong in a single message. Splitting them across several messages
 /// teaches the model to stop asking for more than one tool at a time.
 /// </remarks>
-public sealed record AnthropicToolResultMessage(IList<AnthropicToolResultContent> Content, string Role = "user") : IMessage<IList<AnthropicToolResultContent>>;
+public sealed record AnthropicToolResultMessage(IList<AnthropicToolResultContent> Content, string Role = "user") : IMessage<IList<AnthropicToolResultContent>>
+{
+    //
+    // The properties of the parameters, declared again to be settable, as the messages demand it. Keep them in
+    // the order of the parameters, which is the order they get written in:
+    //
+    public IList<AnthropicToolResultContent> Content { get; set; } = Content;
+    public string Role { get; set; } = Role;
+}

app/MindWork AI Studio/Provider/Anthropic/AnthropicUsage.cs

@@ -23,17 +23,17 @@ public sealed record AnthropicUsage
     /// <summary>
     /// What the request carried after its last cache breakpoint, which is all of it without caching.
     /// </summary>
-    public int? InputTokens { get; init; }
+    public int? InputTokens { get; set; }
 
     /// <summary>
     /// What the request wrote to the cache.
     /// </summary>
-    public int? CacheCreationInputTokens { get; init; }
+    public int? CacheCreationInputTokens { get; set; }
 
     /// <summary>
     /// What the request read from the cache.
     /// </summary>
-    public int? CacheReadInputTokens { get; init; }
+    public int? CacheReadInputTokens { get; set; }
 
     /// <summary>
     /// States what this block reports, as far as it can be believed.

app/MindWork AI Studio/Provider/Anthropic/ChatRequest.cs

@@ -10,7 +10,11 @@ namespace AIStudio.Provider.Anthropic;
 /// <param name="MaxTokens">The maximum number of tokens to generate.</param>
 /// <param name="Stream">Whether to stream the chat completion.</param>
 /// <param name="System">The system prompt for the chat completion.</param>
-public readonly record struct ChatRequest(
+/// <remarks>
+/// Not readonly, so that its properties can be settable: the source generation of System.Text.Json refuses to
+/// write extension data which is init-only.
+/// </remarks>
+public record struct ChatRequest(
     string Model,
     IList<IMessageBase> Messages,
     int MaxTokens,
@@ -26,9 +30,12 @@ public readonly record struct ChatRequest(
     /// tools at all, and the final round of a tool conversation has to offer none.
     /// </remarks>
     [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
-    public IList<AnthropicTool>? Tools { get; init; }
+    public IList<AnthropicTool>? Tools { get; set; }
 
-    // Attention: The "required" modifier is not supported for [JsonExtensionData].
+    //
+    // Attention: The "required" modifier is not supported for [JsonExtensionData], and neither is init: the source
+    // generation of System.Text.Json refuses to write the request at all then.
+    //
     [JsonExtensionData]
-    public IDictionary<string, object> AdditionalApiParameters { get; init; } = new Dictionary<string, object>();
+    public IDictionary<string, object> AdditionalApiParameters { get; set; } = new Dictionary<string, object>();
 }

app/MindWork AI Studio/Provider/Anthropic/SubContentBase64Image.cs

@@ -4,7 +4,7 @@ public record SubContentBase64Image : ISubContentImageSource
 {
     public SubContentImageType Type => SubContentImageType.BASE64;
 
-    public string MediaType { get; init; } = string.Empty;
+    public string MediaType { get; set; } = string.Empty;
     
-    public string Data { get; init; } = string.Empty;
+    public string Data { get; set; } = string.Empty;
 }

app/MindWork AI Studio/Provider/Anthropic/SubContentImage.cs

@@ -4,6 +4,15 @@ namespace AIStudio.Provider.Anthropic;
 
 public record SubContentImage(SubContentType Type, ISubContentImageSource Source) : ISubContent
 {
+    //
+    // The properties of the parameters, declared again to be settable. The source generation of System.Text.Json
+    // sets every init-only property while it creates the object, also one missing in the JSON, so its value from
+    // the parameterless constructor would get lost. Keep them first and in the order of the parameters, which is
+    // the order they get written in:
+    //
+    public SubContentType Type { get; set; } = Type;
+    public ISubContentImageSource Source { get; set; } = Source;
+
     public SubContentImage() : this(SubContentType.IMAGE, new SubContentImageUrl())
     {
     }

app/MindWork AI Studio/Provider/Anthropic/SubContentImageUrl.cs

@@ -4,5 +4,5 @@ public record SubContentImageUrl : ISubContentImageSource
 {
     public SubContentImageType Type => SubContentImageType.URL;
 
-    public string Url { get; init; } = string.Empty;
+    public string Url { get; set; } = string.Empty;
 }

app/MindWork AI Studio/Provider/BaseProvider.cs

@@ -1377,7 +1377,7 @@ public abstract class BaseProvider : IProvider, ISecretId
             if (runnableTools.Count > 0)
             {
                 var adapter = new ChatCompletionToolCallingAdapter<TRequest>(requestFactory, systemPrompt, apiParameters,
-                    runnableTools.Select(x => ProviderToolAdapters.ToChatCompletionTool(x.Definition, enforcesStrictToolSchemas)).ToList(), mayAskForSequentialToolCalls, runnableTools,
+                    runnableTools.Select(x => (object)ProviderToolAdapters.ToChatCompletionTool(x.Definition, enforcesStrictToolSchemas)).ToList(), mayAskForSequentialToolCalls, runnableTools,
                     (requestDto, requestToken) => this.StreamChatCompletionRequest(requestDto, providerName, requestPath, requestedSecret, requestHeadersAction, requestToken),
                     ChatCompletionSourceReader.Read<TDelta, TAnnotation>,
                     this.logger);
@@ -1662,13 +1662,7 @@ public abstract class BaseProvider : IProvider, ISecretId
                 modelName = "placeholder";
             
             // Prepare the HTTP embedding request:
-            var payload = new
+            var payload = new EmbeddingRequest(modelName, texts);
-            {
-                model = modelName,
-                input = texts,
-                encoding_format = "float"
-            };
-            
             var embeddingRequest = JsonSerializer.Serialize(payload, JSON_SERIALIZER_OPTIONS);
             using var request = new HttpRequestMessage(HttpMethod.Post, host.EmbeddingURL());
 

app/MindWork AI Studio/Provider/EmbeddingRequest.cs

@@ -0,0 +1,14 @@
+namespace AIStudio.Provider;
+
+/// <summary>
+/// A request for embeddings, in the shape of the OpenAI API, which most providers take.
+/// </summary>
+/// <param name="Model">The name of the embedding model.</param>
+/// <param name="Input">The texts to embed.</param>
+public sealed record EmbeddingRequest(string Model, IList<string> Input)
+{
+    /// <summary>
+    /// Asks for the vectors as numbers, instead of as base64.
+    /// </summary>
+    public string EncodingFormat => "float";
+}

app/MindWork AI Studio/Provider/EmbeddingResponse.cs

@@ -2,13 +2,13 @@
 
 public sealed record EmbeddingResponse
 {
-    public string? Id { get; init; }
+    public string? Id { get; set; }
     
-    public string? Object { get; init; }
+    public string? Object { get; set; }
     
-    public List<EmbeddingData>? Data { get; init; }
+    public List<EmbeddingData>? Data { get; set; }
     
-    public string? Model { get; init; }
+    public string? Model { get; set; }
     
-    public EmbeddingUsage? Usage { get; init; }
+    public EmbeddingUsage? Usage { get; set; }
 }

app/MindWork AI Studio/Provider/Google/GoogleEmbedding.cs

@@ -2,5 +2,5 @@
 
 public sealed record GoogleEmbedding
 {
-    public List<float>? Values { get; init; }
+    public List<float>? Values { get; set; }
 }

app/MindWork AI Studio/Provider/Google/GoogleEmbeddingContent.cs

@@ -0,0 +1,7 @@
+namespace AIStudio.Provider.Google;
+
+/// <summary>
+/// The content of a request for an embedding to the Gemini API.
+/// </summary>
+/// <param name="Parts">The texts, each of them as a part of its own.</param>
+public sealed record GoogleEmbeddingContent(IList<GoogleEmbeddingPart> Parts);

app/MindWork AI Studio/Provider/Google/GoogleEmbeddingPart.cs

@@ -0,0 +1,7 @@
+namespace AIStudio.Provider.Google;
+
+/// <summary>
+/// One text in a request for an embedding to the Gemini API.
+/// </summary>
+/// <param name="Text">The text to embed.</param>
+public sealed record GoogleEmbeddingPart(string Text);

app/MindWork AI Studio/Provider/Google/GoogleEmbeddingRequest.cs

@@ -0,0 +1,22 @@
+namespace AIStudio.Provider.Google;
+
+/// <summary>
+/// A request for an embedding to the Gemini API.
+/// </summary>
+/// <param name="Content">The texts to embed.</param>
+public sealed record GoogleEmbeddingRequest(GoogleEmbeddingContent Content)
+{
+    /// <summary>
+    /// Asks for vectors which tell how similar texts are.
+    /// </summary>
+    /// <remarks>
+    /// Written as task_type, like every other field of our requests. The API reads both its field names in
+    /// snake case and in camel case.
+    /// </remarks>
+    public string TaskType => "SEMANTIC_SIMILARITY";
+
+    /// <summary>
+    /// Creates the request for the given texts, each of them as a part of its own.
+    /// </summary>
+    public static GoogleEmbeddingRequest Of(IEnumerable<string> texts) => new(new GoogleEmbeddingContent([..texts.Select(text => new GoogleEmbeddingPart(text))]));
+}

app/MindWork AI Studio/Provider/Google/GoogleEmbeddingResponse.cs

@@ -6,9 +6,13 @@ namespace AIStudio.Provider.Google;
 public sealed record GoogleEmbeddingResponse
 {
     [JsonConverter(typeof(GoogleEmbeddingListConverter))]
-    public List<GoogleEmbedding>? Embedding { get; init; }
+    public List<GoogleEmbedding>? Embedding { get; set; }
 
-    private sealed class GoogleEmbeddingListConverter : JsonConverter<List<GoogleEmbedding>>
+    /// <remarks>
+    /// Internal rather than private: the JSON context of the providers has to reach the converter, else it reads
+    /// the embeddings without it.
+    /// </remarks>
+    internal sealed class GoogleEmbeddingListConverter : JsonConverter<List<GoogleEmbedding>>
     {
         public override List<GoogleEmbedding> Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
         {

app/MindWork AI Studio/Provider/Google/ProviderGoogle.cs

@@ -92,16 +92,7 @@ public class ProviderGoogle() : BaseProvider(LLMProviders.GOOGLE, new Uri("https
             }
             
             // Prepare the Google Gemini embedding request:
-            var payload = new
+            var payload = GoogleEmbeddingRequest.Of(texts);
-            {
-                content = new
-                {
-                    parts = texts.Select(text => new { text }).ToArray()
-                },
-                
-                taskType = "SEMANTIC_SIMILARITY"
-            };
-            
             var embeddingRequest = JsonSerializer.Serialize(payload, JSON_SERIALIZER_OPTIONS);
             var embedUrl = $"https://generativelanguage.googleapis.com/v1beta/models/{modelName}:embedContent";
             using var request = new HttpRequestMessage(HttpMethod.Post, embedUrl);

app/MindWork AI Studio/Provider/IMessage.cs

@@ -11,5 +11,5 @@ public interface IMessage<T> : IMessageBase
     /// The content encapsulates the core information or data being transmitted,
     /// and its type can vary based on the specific implementation or use case.
     /// </summary>
-    public T Content { get; init; }
+    public T Content { get; set; }
 }

app/MindWork AI Studio/Provider/IMessageBase.cs

@@ -10,5 +10,5 @@ public interface IMessageBase
     /// This property typically identifies whether the entity is acting
     /// as a user, assistant, or system in the context of the interaction.
     /// </summary>
-    public string Role { get; init; }
+    public string Role { get; set; }
 }

app/MindWork AI Studio/Provider/OpenAI/AssistantToolCallMessage.cs

@@ -5,12 +5,12 @@ namespace AIStudio.Provider.OpenAI;
 
 public sealed record AssistantToolCallMessage : IMessageBase
 {
-    public string Role { get; init; } = "assistant";
+    public string Role { get; set; } = "assistant";
 
-    public JsonElement? Content { get; init; }
+    public JsonElement? Content { get; set; }
 
     [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
-    public string? ReasoningContent { get; init; }
+    public string? ReasoningContent { get; set; }
 
-    public IList<ChatCompletionToolCall> ToolCalls { get; init; } = [];
+    public IList<ChatCompletionToolCall> ToolCalls { get; set; } = [];
 }

app/MindWork AI Studio/Provider/OpenAI/ChatCompletionAPIRequest.cs

@@ -14,15 +14,25 @@ public record ChatCompletionAPIRequest(
     bool Stream
 )
 {
+    //
+    // The properties of the parameters, declared again to be settable. The source generation of System.Text.Json
+    // sets every init-only property while it creates the object, also one missing in the JSON, so its value from
+    // the parameterless constructor would get lost. Keep them first and in the order of the parameters, which is
+    // the order they get written in:
+    //
+    public string Model { get; set; } = Model;
+    public IList<IMessageBase> Messages { get; set; } = Messages;
+    public bool Stream { get; set; } = Stream;
+
     public ChatCompletionAPIRequest() : this(string.Empty, [], true)
     {
     }
 
     [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
-    public IList<object>? Tools { get; init; }
+    public IList<object>? Tools { get; set; }
 
     [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
-    public bool? ParallelToolCalls { get; init; }
+    public bool? ParallelToolCalls { get; set; }
 
     /// <summary>
     /// Asks a streamed request to end with what it cost.
@@ -35,7 +45,10 @@ public record ChatCompletionAPIRequest(
     [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
     public ChatCompletionStreamOptions? StreamOptions => this.Stream ? ChatCompletionStreamOptions.INCLUDE_USAGE : null;
     
-    // Attention: The "required" modifier is not supported for [JsonExtensionData].
+    //
+    // Attention: The "required" modifier is not supported for [JsonExtensionData], and neither is init: the source
+    // generation of System.Text.Json refuses to write the request at all then.
+    //
     [JsonExtensionData]
-    public IDictionary<string, object> AdditionalApiParameters { get; init; } = new Dictionary<string, object>();
+    public IDictionary<string, object> AdditionalApiParameters { get; set; } = new Dictionary<string, object>();
 }

app/MindWork AI Studio/Provider/OpenAI/ChatCompletionChoice.cs

@@ -7,6 +7,14 @@ namespace AIStudio.Provider.OpenAI;
 /// <param name="Delta">The delta text of the choice.</param>
 public record ChatCompletionChoice(int Index, ChatCompletionDelta Delta)
 {
+    //
+    // The properties of the parameters, declared again to be settable. The source generation of System.Text.Json
+    // sets every init-only property while it creates the object, also one missing in the JSON, so its value from
+    // the parameterless constructor would get lost. Keep them first and in the order of the parameters:
+    //
+    public int Index { get; set; } = Index;
+    public ChatCompletionDelta Delta { get; set; } = Delta;
+
     public ChatCompletionChoice() : this(0, new())
     {
     }

app/MindWork AI Studio/Provider/OpenAI/ChatCompletionDelta.cs

@@ -9,7 +9,7 @@ namespace AIStudio.Provider.OpenAI;
 public sealed record ChatCompletionDelta
 {
     [JsonPropertyName("content")]
-    public JsonElement? RawContent { get; init; }
+    public JsonElement? RawContent { get; set; }
 
     [JsonIgnore]
     public string Content => ChatCompletionContent.GetText(this.RawContent) ?? string.Empty;

app/MindWork AI Studio/Provider/OpenAI/ChatCompletionDeltaStreamLine.cs

@@ -11,6 +11,19 @@ namespace AIStudio.Provider.OpenAI;
 /// <param name="Choices">The choices made by the AI.</param>
 public record ChatCompletionDeltaStreamLine(string Id, string Object, uint Created, string Model, string SystemFingerprint, IList<ChatCompletionChoice> Choices) : IResponseStreamLine
 {
+    //
+    // The properties of the parameters, declared again to be settable. The source generation of System.Text.Json
+    // sets every init-only property while it creates the object, also one missing in the JSON, so its value from
+    // the parameterless constructor would get lost, e.g., the empty list of choices of the line which carries the
+    // usage. Keep them first and in the order of the parameters:
+    //
+    public string Id { get; set; } = Id;
+    public string Object { get; set; } = Object;
+    public uint Created { get; set; } = Created;
+    public string Model { get; set; } = Model;
+    public string SystemFingerprint { get; set; } = SystemFingerprint;
+    public IList<ChatCompletionChoice> Choices { get; set; } = Choices;
+
     public ChatCompletionDeltaStreamLine() : this(string.Empty, string.Empty, 0, string.Empty, string.Empty, [])
     {
     }
@@ -25,7 +38,7 @@ public record ChatCompletionDeltaStreamLine(string Id, string Object, uint Creat
     /// line of its own which carries no choices -- which is why the usage is read apart from the
     /// content rather than next to it.
     /// </remarks>
-    public ChatCompletionUsage? Usage { get; init; }
+    public ChatCompletionUsage? Usage { get; set; }
 
     /// <inheritdoc />
     public bool ContainsContent() => this.Choices.Count > 0;

app/MindWork AI Studio/Provider/OpenAI/ChatCompletionFunctionDeclaration.cs

@@ -0,0 +1,17 @@
+using System.Text.Json;
+
+namespace AIStudio.Provider.OpenAI;
+
+/// <summary>
+/// The function a tool of a Chat Completions compatible API offers to the model.
+/// </summary>
+public sealed record ChatCompletionFunctionDeclaration
+{
+    public string Name { get; set; } = string.Empty;
+
+    public string Description { get; set; } = string.Empty;
+
+    public JsonElement Parameters { get; set; }
+
+    public bool Strict { get; set; }
+}

app/MindWork AI Studio/Provider/OpenAI/ChatCompletionFunctionTool.cs

@@ -0,0 +1,11 @@
+namespace AIStudio.Provider.OpenAI;
+
+/// <summary>
+/// The function tool definition shape expected by Chat Completions compatible APIs, with the function nested.
+/// </summary>
+public sealed record ChatCompletionFunctionTool
+{
+    public string Type { get; set; } = "function";
+
+    public ChatCompletionFunctionDeclaration Function { get; set; } = new();
+}

app/MindWork AI Studio/Provider/OpenAI/ChatCompletionStreamDelta.cs

@@ -16,7 +16,7 @@ public sealed record ChatCompletionStreamDelta
     /// The content as it arrived: a string for most providers, a list of parts for some.
     /// </summary>
     [JsonPropertyName("content")]
-    public JsonElement? RawContent { get; init; }
+    public JsonElement? RawContent { get; set; }
 
     /// <summary>
     /// The text of this fragment, whichever shape it arrived in.
@@ -27,10 +27,10 @@ public sealed record ChatCompletionStreamDelta
     /// <summary>
     /// The reasoning text some providers stream next to the answer.
     /// </summary>
-    public string? ReasoningContent { get; init; }
+    public string? ReasoningContent { get; set; }
 
     /// <summary>
     /// The fragments of the tool calls the model is asking for.
     /// </summary>
-    public IList<ChatCompletionToolCallDelta?>? ToolCalls { get; init; }
+    public IList<ChatCompletionToolCallDelta?>? ToolCalls { get; set; }
 }

app/MindWork AI Studio/Provider/OpenAI/ChatCompletionToolCall.cs

@@ -5,12 +5,12 @@ namespace AIStudio.Provider.OpenAI;
 
 public sealed record ChatCompletionToolCall
 {
-    public string? Id { get; init; }
+    public string? Id { get; set; }
 
-    public string? Type { get; init; } = "function";
+    public string? Type { get; set; } = "function";
 
-    public ChatCompletionToolFunction? Function { get; init; }
+    public ChatCompletionToolFunction? Function { get; set; }
 
     [JsonExtensionData]
-    public IDictionary<string, JsonElement> AdditionalMetadata { get; init; } = new Dictionary<string, JsonElement>();
+    public IDictionary<string, JsonElement> AdditionalMetadata { get; set; } = new Dictionary<string, JsonElement>();
 }

app/MindWork AI Studio/Provider/OpenAI/ChatCompletionToolCallAccumulator.cs

@@ -117,7 +117,7 @@ public sealed class ChatCompletionToolCallAccumulator(Func<ServerSentEvent, ILis
             // No text means no content field, the way a round which only calls a tool arrives
             // when it is not streamed. Some providers reject an empty string in its place.
             //
-            RawContent = answer.Length is 0 ? null : JsonSerializer.SerializeToElement(answer),
+            RawContent = answer.Length is 0 ? null : JsonSerializer.SerializeToElement(answer, ProviderJsonOptions.OPTIONS),
             ReasoningContent = this.reasoning.Length is 0 ? null : this.reasoning.ToString(),
             ToolCalls = this.toolCalls.Count is 0
                 ? null

app/MindWork AI Studio/Provider/OpenAI/ChatCompletionToolFunction.cs

@@ -2,7 +2,7 @@ namespace AIStudio.Provider.OpenAI;
 
 public sealed record ChatCompletionToolFunction
 {
-    public string? Name { get; init; }
+    public string? Name { get; set; }
 
-    public string? Arguments { get; init; }
+    public string? Arguments { get; set; }
 }

app/MindWork AI Studio/Provider/OpenAI/ChatCompletionToolStreamLine.cs

@@ -21,5 +21,5 @@ public sealed record ChatCompletionToolStreamLine(string? Id, IList<ChatCompleti
     /// ChatCompletionAPIRequest asks for it, the requests of the tool rounds included. Not a
     /// positional parameter, because nobody but the serializer ever builds this line.
     /// </remarks>
-    public ChatCompletionUsage? Usage { get; init; }
+    public ChatCompletionUsage? Usage { get; set; }
 }

app/MindWork AI Studio/Provider/OpenAI/ChatCompletionUsage.cs

@@ -17,7 +17,7 @@ public sealed record ChatCompletionUsage
     /// <summary>
     /// What everything sent to the model cost.
     /// </summary>
-    public int? PromptTokens { get; init; }
+    public int? PromptTokens { get; set; }
 
     /// <summary>
     /// States what this block reports, as far as it can be believed.

app/MindWork AI Studio/Provider/OpenAI/ISubContent.cs

@@ -8,5 +8,5 @@ public interface ISubContent
     /// <summary>
     /// The type of the sub-content.
     /// </summary>
-    public SubContentType Type { get; init; }
+    public SubContentType Type { get; set; }
 }

app/MindWork AI Studio/Provider/OpenAI/ISubContentImageUrl.cs

@@ -15,5 +15,5 @@ public interface ISubContentImageUrl
     /// <summary>
     /// The URL or base64-encoded data URI of the image.
     /// </summary>
-    public string Url { get; init; }
+    public string Url { get; set; }
 }

app/MindWork AI Studio/Provider/OpenAI/MultimodalMessage.cs

@@ -7,6 +7,15 @@ namespace AIStudio.Provider.OpenAI;
 /// <param name="Role">The role of the message.</param>
 public record MultimodalMessage(List<ISubContent> Content, string Role) : IMessage<List<ISubContent>>
 {
+    //
+    // The properties of the parameters, declared again to be settable. The source generation of System.Text.Json
+    // sets every init-only property while it creates the object, also one missing in the JSON, so its value from
+    // the parameterless constructor would get lost. Keep them first and in the order of the parameters, which is
+    // the order they get written in:
+    //
+    public List<ISubContent> Content { get; set; } = Content;
+    public string Role { get; set; } = Role;
+
     public MultimodalMessage() : this([], string.Empty)
     {
     }

app/MindWork AI Studio/Provider/OpenAI/OpenAIStrictToolSchema.cs

@@ -59,7 +59,7 @@ public static class OpenAIStrictToolSchema
         // schema stays stable across requests, which prompt caching depends on.
         //
         schema["required"] = new JsonArray([..properties.Select(property => JsonValue.Create(property.Key))]);
-        return JsonSerializer.Deserialize<JsonElement>(schema.ToJsonString());
+        return JsonSerializer.Deserialize<JsonElement>(schema.ToJsonString(), ProviderJsonOptions.OPTIONS);
     }
 
     private static void AllowNullType(JsonObject property)

app/MindWork AI Studio/Provider/OpenAI/ResponsesAPIRequest.cs

@@ -17,11 +17,26 @@ public record ResponsesAPIRequest(
     bool Store,
     IList<object> Tools)
 {
+    //
+    // The properties of the parameters, declared again to be settable. The source generation of System.Text.Json
+    // sets every init-only property while it creates the object, also one missing in the JSON, so its value from
+    // the parameterless constructor would get lost. Keep them first and in the order of the parameters, which is
+    // the order they get written in:
+    //
+    public string Model { get; set; } = Model;
+    public IList<object> Input { get; set; } = Input;
+    public bool Stream { get; set; } = Stream;
+    public bool Store { get; set; } = Store;
+    public IList<object> Tools { get; set; } = Tools;
+
     public ResponsesAPIRequest() : this(string.Empty, [], true, false, [])
     {
     }
-    
+
-    // Attention: The "required" modifier is not supported for [JsonExtensionData].
+    //
+    // Attention: The "required" modifier is not supported for [JsonExtensionData], and neither is init: the source
+    // generation of System.Text.Json refuses to write the request at all then.
+    //
     [JsonExtensionData]
-    public IDictionary<string, object> AdditionalApiParameters { get; init; } = new Dictionary<string, object>();
+    public IDictionary<string, object> AdditionalApiParameters { get; set; } = new Dictionary<string, object>();
 }

app/MindWork AI Studio/Provider/OpenAI/ResponsesFunctionCallOutputItem.cs

@@ -5,9 +5,9 @@ namespace AIStudio.Provider.OpenAI;
 /// </summary>
 public sealed record ResponsesFunctionCallOutputItem
 {
-    public string Type { get; init; } = "function_call_output";
+    public string Type { get; set; } = "function_call_output";
 
-    public string CallId { get; init; } = string.Empty;
+    public string CallId { get; set; } = string.Empty;
 
-    public string Output { get; init; } = string.Empty;
+    public string Output { get; set; } = string.Empty;
 }

app/MindWork AI Studio/Provider/OpenAI/ResponsesFunctionTool.cs

@@ -7,13 +7,13 @@ namespace AIStudio.Provider.OpenAI;
 /// </summary>
 public sealed record ResponsesFunctionTool
 {
-    public string Type { get; init; } = "function";
+    public string Type { get; set; } = "function";
 
-    public string Name { get; init; } = string.Empty;
+    public string Name { get; set; } = string.Empty;
 
-    public string Description { get; init; } = string.Empty;
+    public string Description { get; set; } = string.Empty;
 
-    public JsonElement Parameters { get; init; }
+    public JsonElement Parameters { get; set; }
 
-    public bool Strict { get; init; }
+    public bool Strict { get; set; }
 }

app/MindWork AI Studio/Provider/OpenAI/ResponsesResponse.cs

@@ -17,18 +17,18 @@ public sealed record ResponsesResponse
     /// </remarks>
     private static readonly HashSet<string> OUTPUT_ITEMS_LEAVING_THE_INPUT_ALONE = ["message", "reasoning", "function_call"];
 
-    public string Id { get; init; } = string.Empty;
+    public string Id { get; set; } = string.Empty;
 
-    public string Model { get; init; } = string.Empty;
+    public string Model { get; set; } = string.Empty;
 
-    public string? OutputText { get; init; }
+    public string? OutputText { get; set; }
 
-    public IList<JsonElement> Output { get; init; } = [];
+    public IList<JsonElement> Output { get; set; } = [];
 
     /// <summary>
     /// What OpenAI says the response cost. Only the completed response carries it.
     /// </summary>
-    public ResponsesUsage? Usage { get; init; }
+    public ResponsesUsage? Usage { get; set; }
 
     /// <summary>
     /// States what the request of this response carried, as far as it can be believed.

app/MindWork AI Studio/Provider/OpenAI/ResponsesUsage.cs

@@ -17,7 +17,7 @@ public sealed record ResponsesUsage
     /// <summary>
     /// What everything sent to the model cost, the cached part included.
     /// </summary>
-    public int? InputTokens { get; init; }
+    public int? InputTokens { get; set; }
 
     /// <summary>
     /// States what this block reports, as far as it can be believed.

app/MindWork AI Studio/Provider/OpenAI/SubContentImageUrl.cs

@@ -5,6 +5,15 @@ namespace AIStudio.Provider.OpenAI;
 /// </summary>
 public record SubContentImageUrl(SubContentType Type, string ImageUrl) : ISubContent
 {
+    //
+    // The properties of the parameters, declared again to be settable. The source generation of System.Text.Json
+    // sets every init-only property while it creates the object, also one missing in the JSON, so its value from
+    // the parameterless constructor would get lost. Keep them first and in the order of the parameters, which is
+    // the order they get written in:
+    //
+    public SubContentType Type { get; set; } = Type;
+    public string ImageUrl { get; set; } = ImageUrl;
+
     public SubContentImageUrl() : this(SubContentType.IMAGE_URL, string.Empty)
     {
     }

app/MindWork AI Studio/Provider/OpenAI/SubContentImageUrlData.cs

@@ -13,5 +13,5 @@ namespace AIStudio.Provider.OpenAI;
 public record SubContentImageUrlData : ISubContentImageUrl
 {
     /// <inheritdoc />
-    public string Url { get; init; } = string.Empty;
+    public string Url { get; set; } = string.Empty;
 }

app/MindWork AI Studio/Provider/OpenAI/SubContentImageUrlNested.cs

@@ -12,6 +12,15 @@ namespace AIStudio.Provider.OpenAI;
 /// </remarks>
 public record SubContentImageUrlNested(SubContentType Type, ISubContentImageUrl ImageUrl) : ISubContent
 {
+    //
+    // The properties of the parameters, declared again to be settable. The source generation of System.Text.Json
+    // sets every init-only property while it creates the object, also one missing in the JSON, so its value from
+    // the parameterless constructor would get lost. Keep them first and in the order of the parameters, which is
+    // the order they get written in:
+    //
+    public SubContentType Type { get; set; } = Type;
+    public ISubContentImageUrl ImageUrl { get; set; } = ImageUrl;
+
     public SubContentImageUrlNested() : this(SubContentType.IMAGE_URL, new SubContentImageUrlData())
     {
     }

app/MindWork AI Studio/Provider/OpenAI/SubContentInputImage.cs

@@ -8,6 +8,15 @@ namespace AIStudio.Provider.OpenAI;
 /// </remarks>
 public record SubContentInputImage(SubContentType Type, string ImageUrl) : ISubContent
 {
+    //
+    // The properties of the parameters, declared again to be settable. The source generation of System.Text.Json
+    // sets every init-only property while it creates the object, also one missing in the JSON, so its value from
+    // the parameterless constructor would get lost. Keep them first and in the order of the parameters, which is
+    // the order they get written in:
+    //
+    public SubContentType Type { get; set; } = Type;
+    public string ImageUrl { get; set; } = ImageUrl;
+
     public SubContentInputImage() : this(SubContentType.INPUT_IMAGE, string.Empty)
     {
     }

app/MindWork AI Studio/Provider/OpenAI/SubContentInputText.cs

@@ -8,6 +8,15 @@ namespace AIStudio.Provider.OpenAI;
 /// </remarks>
 public record SubContentInputText(SubContentType Type, string Text) : ISubContent
 {
+    //
+    // The properties of the parameters, declared again to be settable. The source generation of System.Text.Json
+    // sets every init-only property while it creates the object, also one missing in the JSON, so its value from
+    // the parameterless constructor would get lost. Keep them first and in the order of the parameters, which is
+    // the order they get written in:
+    //
+    public SubContentType Type { get; set; } = Type;
+    public string Text { get; set; } = Text;
+
     public SubContentInputText() : this(SubContentType.INPUT_TEXT, string.Empty)
     {
     }

app/MindWork AI Studio/Provider/OpenAI/SubContentText.cs

@@ -5,6 +5,15 @@ namespace AIStudio.Provider.OpenAI;
 /// </summary>
 public record SubContentText(SubContentType Type, string Text) : ISubContent
 {
+    //
+    // The properties of the parameters, declared again to be settable. The source generation of System.Text.Json
+    // sets every init-only property while it creates the object, also one missing in the JSON, so its value from
+    // the parameterless constructor would get lost. Keep them first and in the order of the parameters, which is
+    // the order they get written in:
+    //
+    public SubContentType Type { get; set; } = Type;
+    public string Text { get; set; } = Text;
+
     public SubContentText() : this(SubContentType.TEXT, string.Empty)
     {
     }

app/MindWork AI Studio/Provider/OpenAI/TextMessage.cs

@@ -7,6 +7,15 @@ namespace AIStudio.Provider.OpenAI;
 /// <param name="Role">The role of the message.</param>
 public record TextMessage(string Content, string Role) : IMessage<string>
 {
+    //
+    // The properties of the parameters, declared again to be settable. The source generation of System.Text.Json
+    // sets every init-only property while it creates the object, also one missing in the JSON, so its value from
+    // the parameterless constructor would get lost. Keep them first and in the order of the parameters, which is
+    // the order they get written in:
+    //
+    public string Content { get; set; } = Content;
+    public string Role { get; set; } = Role;
+
     public TextMessage() : this(string.Empty, string.Empty)
     {
     }

app/MindWork AI Studio/Provider/OpenAI/ToolResultMessage.cs

@@ -2,9 +2,9 @@ namespace AIStudio.Provider.OpenAI;
 
 public sealed record ToolResultMessage : IMessage<string>
 {
-    public string Role { get; init; } = "tool";
+    public string Role { get; set; } = "tool";
 
-    public string Content { get; init; } = string.Empty;
+    public string Content { get; set; } = string.Empty;
 
-    public string ToolCallId { get; init; } = string.Empty;
+    public string ToolCallId { get; set; } = string.Empty;
 }

app/MindWork AI Studio/Provider/ProviderJsonContext.cs

@@ -0,0 +1,129 @@
+using System.Text.Json;
+using System.Text.Json.Serialization;
+
+using AIStudio.Provider.Anthropic;
+using AIStudio.Provider.Google;
+using AIStudio.Provider.Groq;
+using AIStudio.Provider.HuggingFace;
+using AIStudio.Provider.OpenAI;
+using AIStudio.Provider.OpenRouter;
+using AIStudio.Provider.Requesty;
+
+using AnthropicDelta = AIStudio.Provider.Anthropic.Delta;
+using AnthropicImageUrl = AIStudio.Provider.Anthropic.SubContentImageUrl;
+using AnthropicResponseStreamLine = AIStudio.Provider.Anthropic.ResponseStreamLine;
+using FireworksChoice = AIStudio.Provider.Fireworks.Choice;
+using FireworksDelta = AIStudio.Provider.Fireworks.Delta;
+using FireworksResponseStreamLine = AIStudio.Provider.Fireworks.ResponseStreamLine;
+using HuggingFaceModelsResponse = AIStudio.Provider.HuggingFace.ModelsResponse;
+using MistralModel = AIStudio.Provider.Mistral.Model;
+using MistralModelsResponse = AIStudio.Provider.Mistral.ModelsResponse;
+using OpenAIImageUrl = AIStudio.Provider.OpenAI.SubContentImageUrl;
+using OpenAIModelsResponse = AIStudio.Provider.OpenAI.ModelsResponse;
+using PerplexityChoice = AIStudio.Provider.Perplexity.Choice;
+using PerplexityDelta = AIStudio.Provider.Perplexity.Delta;
+using PerplexityResponseStreamLine = AIStudio.Provider.Perplexity.ResponseStreamLine;
+using SelfHostedModel = AIStudio.Provider.SelfHosted.Model;
+using SelfHostedModelsResponse = AIStudio.Provider.SelfHosted.ModelsResponse;
+
+namespace AIStudio.Provider;
+
+/// <summary>
+/// The contracts with which System.Text.Json reads and writes the requests and answers of LLM providers, built
+/// at compile time.
+/// </summary>
+/// <remarks>
+/// Some types System.Text.Json meets only while it runs, since no property names them: the messages and their
+/// parts, which converters write as the type they are of; the annotations, which a converter reads as the type
+/// their JSON tells; and whatever a request holds as an object, i.e., the values of the additional API
+/// parameters, the tools, and the items of an earlier answer. A test fails for such a type which is missing
+/// here.<br/><br/>
+///
+/// Two types with the same name need a name of their own for their contract, else the generator builds only
+/// the first of them and warns with SYSLIB1031.
+/// </remarks>
+[JsonSourceGenerationOptions(GenerationMode = JsonSourceGenerationMode.Metadata)]
+
+// The requests:
+[JsonSerializable(typeof(ChatCompletionAPIRequest))]
+[JsonSerializable(typeof(ResponsesAPIRequest))]
+[JsonSerializable(typeof(ChatRequest))]
+[JsonSerializable(typeof(EmbeddingRequest))]
+[JsonSerializable(typeof(GoogleEmbeddingRequest))]
+
+// The messages and their parts:
+[JsonSerializable(typeof(TextMessage))]
+[JsonSerializable(typeof(MultimodalMessage))]
+[JsonSerializable(typeof(AssistantToolCallMessage))]
+[JsonSerializable(typeof(ToolResultMessage))]
+[JsonSerializable(typeof(AnthropicMessage))]
+[JsonSerializable(typeof(AnthropicToolResultMessage))]
+[JsonSerializable(typeof(SubContentText))]
+[JsonSerializable(typeof(OpenAIImageUrl), TypeInfoPropertyName = "OpenAISubContentImageUrl")]
+[JsonSerializable(typeof(SubContentImageUrlNested))]
+[JsonSerializable(typeof(SubContentImageUrlData))]
+[JsonSerializable(typeof(SubContentInputText))]
+[JsonSerializable(typeof(SubContentInputImage))]
+[JsonSerializable(typeof(SubContentImage))]
+[JsonSerializable(typeof(SubContentBase64Image))]
+[JsonSerializable(typeof(AnthropicImageUrl), TypeInfoPropertyName = "AnthropicSubContentImageUrl")]
+
+// What a request holds as an object:
+[JsonSerializable(typeof(string))]
+[JsonSerializable(typeof(int))]
+[JsonSerializable(typeof(long))]
+[JsonSerializable(typeof(double))]
+[JsonSerializable(typeof(decimal))]
+[JsonSerializable(typeof(bool))]
+[JsonSerializable(typeof(Dictionary<string, object>))]
+[JsonSerializable(typeof(List<object>))]
+[JsonSerializable(typeof(JsonElement))]
+[JsonSerializable(typeof(ChatCompletionFunctionTool))]
+[JsonSerializable(typeof(ResponsesFunctionTool))]
+[JsonSerializable(typeof(ResponsesFunctionCallOutputItem))]
+
+// The lists of models:
+[JsonSerializable(typeof(OpenAIModelsResponse), TypeInfoPropertyName = "OpenAIModelsResponse")]
+[JsonSerializable(typeof(MistralModelsResponse), TypeInfoPropertyName = "MistralModelsResponse")]
+[JsonSerializable(typeof(SelfHostedModelsResponse), TypeInfoPropertyName = "SelfHostedModelsResponse")]
+[JsonSerializable(typeof(HuggingFaceModelsResponse), TypeInfoPropertyName = "HuggingFaceModelsResponse")]
+[JsonSerializable(typeof(IList<HubModel>))]
+[JsonSerializable(typeof(RequestyModelsResponse))]
+[JsonSerializable(typeof(OpenRouterModelsResponse))]
+[JsonSerializable(typeof(GroqModelsResponse))]
+
+// The lines of streamed answers, with the annotations:
+[JsonSerializable(typeof(ChatCompletionDeltaStreamLine))]
+[JsonSerializable(typeof(ChatCompletionAnnotationStreamLine))]
+[JsonSerializable(typeof(ChatCompletionToolStreamLine))]
+[JsonSerializable(typeof(ResponsesDeltaStreamLine))]
+[JsonSerializable(typeof(ResponsesAnnotationStreamLine))]
+[JsonSerializable(typeof(ResponsesCompletedStreamLine))]
+[JsonSerializable(typeof(AnthropicResponseStreamLine), TypeInfoPropertyName = "AnthropicResponseStreamLine")]
+[JsonSerializable(typeof(AnthropicStreamLine))]
+[JsonSerializable(typeof(FireworksResponseStreamLine), TypeInfoPropertyName = "FireworksResponseStreamLine")]
+[JsonSerializable(typeof(PerplexityResponseStreamLine), TypeInfoPropertyName = "PerplexityResponseStreamLine")]
+[JsonSerializable(typeof(AnnotatingUnknown))]
+[JsonSerializable(typeof(ChatCompletionAnnotatingURL))]
+[JsonSerializable(typeof(ResponsesAnnotatingUrlCitationData))]
+
+// Transcriptions and embeddings:
+[JsonSerializable(typeof(TranscriptionResponse))]
+[JsonSerializable(typeof(EmbeddingResponse))]
+[JsonSerializable(typeof(GoogleEmbeddingResponse))]
+[JsonSerializable(typeof(GoogleEmbedding))]
+[JsonSerializable(typeof(List<GoogleEmbedding>))]
+
+// The types inside the answers which share their names with others:
+[JsonSerializable(typeof(MistralModel), TypeInfoPropertyName = "MistralModel")]
+[JsonSerializable(typeof(MistralModel[]), TypeInfoPropertyName = "MistralModelArray")]
+[JsonSerializable(typeof(SelfHostedModel), TypeInfoPropertyName = "SelfHostedModel")]
+[JsonSerializable(typeof(SelfHostedModel[]), TypeInfoPropertyName = "SelfHostedModelArray")]
+[JsonSerializable(typeof(FireworksChoice), TypeInfoPropertyName = "FireworksChoice")]
+[JsonSerializable(typeof(IList<FireworksChoice>), TypeInfoPropertyName = "IListFireworksChoice")]
+[JsonSerializable(typeof(PerplexityChoice), TypeInfoPropertyName = "PerplexityChoice")]
+[JsonSerializable(typeof(IList<PerplexityChoice>), TypeInfoPropertyName = "IListPerplexityChoice")]
+[JsonSerializable(typeof(AnthropicDelta), TypeInfoPropertyName = "AnthropicDelta")]
+[JsonSerializable(typeof(FireworksDelta), TypeInfoPropertyName = "FireworksDelta")]
+[JsonSerializable(typeof(PerplexityDelta), TypeInfoPropertyName = "PerplexityDelta")]
+internal sealed partial class ProviderJsonContext : JsonSerializerContext;

app/MindWork AI Studio/Provider/ProviderJsonOptions.cs

@@ -21,7 +21,7 @@ public static class ProviderJsonOptions
     /// <summary>
     /// The shared options.
     /// </summary>
-    public static readonly JsonSerializerOptions OPTIONS = new()
+    public static readonly JsonSerializerOptions OPTIONS = new JsonSerializerOptions
     {
         PropertyNamingPolicy = JsonNamingPolicy.SnakeCaseLower,
         Converters =
@@ -33,6 +33,7 @@ public static class ProviderJsonOptions
             new SubContentImageSourceConverter(),
             new SubContentImageUrlConverter(),
         },
-        AllowTrailingCommas = false
+        AllowTrailingCommas = false,
-    };
+        TypeInfoResolver = ProviderJsonContext.Default,
+    }.AsReadOnly();
 }

app/MindWork AI Studio/Provider/ProviderToolAdapters.cs

@@ -24,19 +24,18 @@ public static class ProviderToolAdapters
     /// </summary>
     /// <param name="definition">The tool to describe.</param>
     /// <param name="hostEnforcesStrict">Whether the host binds the model's tool calls to a strict schema. Only then is the tool sent in strict mode.</param>
-    public static object ToChatCompletionTool(ToolDefinition definition, bool hostEnforcesStrict)
+    public static ChatCompletionFunctionTool ToChatCompletionTool(ToolDefinition definition, bool hostEnforcesStrict)
     {
         var isStrict = definition.Function.Strict && hostEnforcesStrict;
-        return new
+        return new()
         {
-            type = "function",
+            Function = new()
-            function = new
             {
-                name = definition.Function.Name,
+                Name = definition.Function.Name,
-                description = definition.Function.DescriptionForLLM,
+                Description = definition.Function.DescriptionForLLM,
-                parameters = ToOpenAIParameters(definition, isStrict),
+                Parameters = ToOpenAIParameters(definition, isStrict),
-                strict = isStrict,
+                Strict = isStrict,
-            }
+            },
         };
     }
 

app/MindWork AI Studio/Tools/ContentStreamDocumentDetails.cs

@@ -5,8 +5,8 @@ namespace AIStudio.Tools;
 public sealed class ContentStreamDocumentDetails
 {
     [JsonPropertyName("page_number")]
-    public int? PageNumber { get; init; }
+    public int? PageNumber { get; set; }
 
     [JsonPropertyName("image")]
-    public ContentStreamPptxImageData? Image { get; init; }
+    public ContentStreamPptxImageData? Image { get; set; }
 }

app/MindWork AI Studio/Tools/ContentStreamDocumentMetadata.cs

@@ -6,5 +6,5 @@ namespace AIStudio.Tools;
 public sealed class ContentStreamDocumentMetadata : ContentStreamSseMetadata
 {
     [JsonPropertyName("Document")]
-    public ContentStreamDocumentDetails? Document { get; init; }
+    public ContentStreamDocumentDetails? Document { get; set; }
 }

app/MindWork AI Studio/Tools/ContentStreamErrorDetails.cs

@@ -7,23 +7,23 @@ namespace AIStudio.Tools;
 public sealed class ContentStreamErrorDetails
 {
     [JsonPropertyName("code")]
-    public string? Code { get; init; }
+    public string? Code { get; set; }
 
     [JsonPropertyName("message")]
-    public string? Message { get; init; }
+    public string? Message { get; set; }
 
     /// <summary>
     /// The page the failure belongs to, when the failure affects a single page only.
     /// </summary>
     [JsonPropertyName("page_number")]
-    public int? PageNumber { get; init; }
+    public int? PageNumber { get; set; }
 
     /// <summary>
     /// The format the runtime identified by looking at the content, e.g. when it contradicts the
     /// file extension.
     /// </summary>
     [JsonPropertyName("detected_format")]
-    public string? DetectedFormat { get; init; }
+    public string? DetectedFormat { get; set; }
 
     /// <summary>
     /// Gets the parsed error code.

app/MindWork AI Studio/Tools/ContentStreamErrorMetadata.cs

@@ -7,5 +7,5 @@ namespace AIStudio.Tools;
 public sealed class ContentStreamErrorMetadata : ContentStreamSseMetadata
 {
     [JsonPropertyName("Error")]
-    public ContentStreamErrorDetails? Error { get; init; }
+    public ContentStreamErrorDetails? Error { get; set; }
 }

app/MindWork AI Studio/Tools/ContentStreamPdfDetails.cs

@@ -7,5 +7,5 @@ namespace AIStudio.Tools;
 public sealed class ContentStreamPdfDetails
 {
     [JsonPropertyName("page_number")] 
-    public int? PageNumber { get; init; }
+    public int? PageNumber { get; set; }
 }

app/MindWork AI Studio/Tools/ContentStreamPdfMetadata.cs

@@ -7,5 +7,5 @@ namespace AIStudio.Tools;
 public sealed class ContentStreamPdfMetadata : ContentStreamSseMetadata
 {
     [JsonPropertyName("Pdf")] 
-    public ContentStreamPdfDetails? Pdf { get; init; }
+    public ContentStreamPdfDetails? Pdf { get; set; }
 }

app/MindWork AI Studio/Tools/ContentStreamPptxImageData.cs

@@ -5,17 +5,17 @@ namespace AIStudio.Tools;
 public sealed class ContentStreamPptxImageData
 {
     [JsonPropertyName("id")] 
-    public string? Id { get; init; }
+    public string? Id { get; set; }
 
     [JsonPropertyName("content")] 
-    public string? Content { get; init; }
+    public string? Content { get; set; }
 
     [JsonPropertyName("segment")] 
-    public int? Segment { get; init; }
+    public int? Segment { get; set; }
 
     [JsonPropertyName("is_end")] 
-    public bool IsEnd { get; init; }
+    public bool IsEnd { get; set; }
 
     [JsonPropertyName("media_type")]
-    public string? MediaType { get; init; }
+    public string? MediaType { get; set; }
 }

app/MindWork AI Studio/Tools/ContentStreamPresentationDetails.cs

@@ -7,8 +7,8 @@ namespace AIStudio.Tools;
 public sealed class ContentStreamPresentationDetails
 {
     [JsonPropertyName("slide_number")] 
-    public int? SlideNumber { get; init; }
+    public int? SlideNumber { get; set; }
 
     [JsonPropertyName("image")] 
-    public ContentStreamPptxImageData? Image { get; init; }
+    public ContentStreamPptxImageData? Image { get; set; }
 }

app/MindWork AI Studio/Tools/ContentStreamPresentationMetadata.cs

@@ -7,5 +7,5 @@ namespace AIStudio.Tools;
 public sealed class ContentStreamPresentationMetadata : ContentStreamSseMetadata
 {
     [JsonPropertyName("Presentation")] 
-    public ContentStreamPresentationDetails? Presentation { get; init; }
+    public ContentStreamPresentationDetails? Presentation { get; set; }
 }

app/MindWork AI Studio/Tools/ContentStreamPromptInjectionDetails.cs

@@ -17,12 +17,12 @@ namespace AIStudio.Tools;
 public sealed class ContentStreamPromptInjectionDetails
 {
     [JsonPropertyName("findings")]
-    public List<PromptInjectionFinding>? Findings { get; init; }
+    public List<PromptInjectionFinding>? Findings { get; set; }
 
     /// <summary>
     /// How many passages were filtered. Can exceed the number of findings, because the runtime
     /// caps how many it reports in detail while it filters every single one.
     /// </summary>
     [JsonPropertyName("redacted_count")]
-    public int RedactedCount { get; init; }
+    public int RedactedCount { get; set; }
 }

app/MindWork AI Studio/Tools/ContentStreamPromptInjectionMetadata.cs

@@ -7,5 +7,5 @@ namespace AIStudio.Tools;
 public sealed class ContentStreamPromptInjectionMetadata : ContentStreamSseMetadata
 {
     [JsonPropertyName("PromptInjection")]
-    public ContentStreamPromptInjectionDetails? PromptInjection { get; init; }
+    public ContentStreamPromptInjectionDetails? PromptInjection { get; set; }
 }

app/MindWork AI Studio/Tools/ContentStreamSpreadsheetDetails.cs

@@ -7,8 +7,8 @@ namespace AIStudio.Tools;
 public sealed class ContentStreamSpreadsheetDetails
 {
     [JsonPropertyName("sheet_name")] 
-    public string? SheetName { get; init; }
+    public string? SheetName { get; set; }
 
     [JsonPropertyName("row_number")] 
-    public int? RowNumber { get; init; }
+    public int? RowNumber { get; set; }
 }

app/MindWork AI Studio/Tools/ContentStreamSpreadsheetMetadata.cs

@@ -7,5 +7,5 @@ namespace AIStudio.Tools;
 public sealed class ContentStreamSpreadsheetMetadata : ContentStreamSseMetadata
 {
     [JsonPropertyName("Spreadsheet")] 
-    public ContentStreamSpreadsheetDetails? Spreadsheet { get; init; }
+    public ContentStreamSpreadsheetDetails? Spreadsheet { get; set; }
 }

app/MindWork AI Studio/Tools/ContentStreamSseEvent.cs

@@ -5,14 +5,14 @@ namespace AIStudio.Tools;
 public sealed class ContentStreamSseEvent
 {
     [JsonPropertyName("content")] 
-    public string? Content { get; init; }
+    public string? Content { get; set; }
     
     [JsonPropertyName("stream_id")] 
-    public string? StreamId { get; init; }
+    public string? StreamId { get; set; }
 
     [JsonPropertyName("metadata")] 
-    public ContentStreamSseMetadata? Metadata { get; init; }
+    public ContentStreamSseMetadata? Metadata { get; set; }
 
     [JsonPropertyName("token_count")]
-    public int? TokenCount { get; init; }
+    public int? TokenCount { get; set; }
 }

app/MindWork AI Studio/Tools/ContentStreamTextDetails.cs

@@ -6,5 +6,5 @@ namespace AIStudio.Tools;
 public sealed class ContentStreamTextDetails
 {
     [JsonPropertyName("line_number")]
-    public int? LineNumber { get; init; }
+    public int? LineNumber { get; set; }
 }

app/MindWork AI Studio/Tools/ContentStreamTextMetadata.cs

@@ -6,5 +6,5 @@ namespace AIStudio.Tools;
 public sealed class ContentStreamTextMetadata : ContentStreamSseMetadata
 {
     [JsonPropertyName("Text")]
-    public ContentStreamTextDetails? Text { get; init; }
+    public ContentStreamTextDetails? Text { get; set; }
 }

app/MindWork AI Studio/Tools/Databases/VectorStore/QdrantEdgeClientImplementation.cs

@@ -215,31 +215,35 @@ public sealed class QdrantEdgeClientImplementation(
         return client;
     }
 
-    // ReSharper disable NotAccessedPositionalProperty.Local
+    //
-    private sealed record EnsureVectorStoreRequest(string StoreName, string DataSourceName, int VectorSize);
+    // The requests are internal rather than private, so that the JSON context of the runtime can name them. It
+    // generates the contracts they get written with, and a context sees no private type of another class.
+    //
+    // ReSharper disable NotAccessedPositionalProperty.Global
+    internal sealed record EnsureVectorStoreRequest(string StoreName, string DataSourceName, int VectorSize);
 
-    private sealed record CheckVectorStoreRequest(string StoreName);
+    internal sealed record CheckVectorStoreRequest(string StoreName);
 
-    private sealed record InsertEmbeddingRequest(string StoreName, IReadOnlyList<VectorStoragePoint> Points);
+    internal sealed record InsertEmbeddingRequest(string StoreName, IReadOnlyList<VectorStoragePoint> Points);
 
     /// <param name="PointIds">The only points the search may return, or null for the whole store.</param>
-    private sealed record SearchEmbeddingRequest(string StoreName, IReadOnlyList<float> Vector, int MaxMatches, IReadOnlyList<string>? PointIds, IReadOnlyList<HiddenChunks> HiddenChunks);
+    internal sealed record SearchEmbeddingRequest(string StoreName, IReadOnlyList<float> Vector, int MaxMatches, IReadOnlyList<string>? PointIds, IReadOnlyList<HiddenChunks> HiddenChunks);
 
-    private sealed record RetrieveVectorsRequest(string StoreName, IReadOnlyList<string> PointIds);
+    internal sealed record RetrieveVectorsRequest(string StoreName, IReadOnlyList<string> PointIds);
 
-    private sealed record DeleteEmbeddingByFileRequest(string StoreName, string FilePath, string ParentFileId, IReadOnlyCollection<string> KeepPointIds);
+    internal sealed record DeleteEmbeddingByFileRequest(string StoreName, string FilePath, string ParentFileId, IReadOnlyCollection<string> KeepPointIds);
 
-    private sealed record RelocateEmbeddingFileRequest(string StoreName, string ParentFileId, string AbsolutePath, string FileName, string RelativePath, string Fingerprint);
+    internal sealed record RelocateEmbeddingFileRequest(string StoreName, string ParentFileId, string AbsolutePath, string FileName, string RelativePath, string Fingerprint);
 
-    private sealed record OptimizeVectorStoreRequest(string StoreName);
+    internal sealed record OptimizeVectorStoreRequest(string StoreName);
-    
+
-    private sealed record DeleteVectorStoreRequest(string StoreName);
+    internal sealed record DeleteVectorStoreRequest(string StoreName);
 
     /// <summary>
     /// Preparing a backup needs nothing but the request itself.
     /// </summary>
-    private sealed record PrepareBackupRequest;
+    internal sealed record PrepareBackupRequest;
 
-    private sealed record CopyStoreForBackupRequest(string BackupId, string StoreName);
+    internal sealed record CopyStoreForBackupRequest(string BackupId, string StoreName);
-    // ReSharper restore NotAccessedPositionalProperty.Local
+    // ReSharper restore NotAccessedPositionalProperty.Global
 }

app/MindWork AI Studio/Tools/Databases/VectorStore/VectorSearchResult.cs

@@ -27,7 +27,7 @@ public sealed record VectorSearchResult(
     /// <remarks>
     /// The vector store keeps only the pages of a chunk, cf. LocalIndexSearchService.SearchVectorsAsync.
     /// </remarks>
-    public ChunkLocation? StoredLocation { get; init; }
+    public ChunkLocation? StoredLocation { get; set; }
 
     /// <summary>
     /// Where the chunk is: what the index store keeps, or the pages alone when it could not say.

app/MindWork AI Studio/Tools/ERIClient/ERIClientBase.cs

@@ -9,7 +9,7 @@ public abstract class ERIClientBase(IERIDataSource dataSource) : IDisposable
 {
     protected readonly IERIDataSource DataSource = dataSource;
     
-    protected static readonly JsonSerializerOptions JSON_OPTIONS = new()
+    internal static readonly JsonSerializerOptions JSON_OPTIONS = new JsonSerializerOptions
     {
         WriteIndented = true,
         AllowTrailingCommas = true,
@@ -20,8 +20,9 @@ public abstract class ERIClientBase(IERIDataSource dataSource) : IDisposable
         Converters =
         {
             new JsonStringEnumConverter(JsonNamingPolicy.SnakeCaseUpper),
-        }
+        },
-    };
+        TypeInfoResolver = ERIClientJsonContext.Default,
+    }.AsReadOnly();
     
     protected readonly HttpClient HttpClient = ExternalHttpClientTimeout.CreateHttpClient(new Uri($"{dataSource.Hostname}:{dataSource.Port}"), ExternalHttpTrustPolicy.ALLOW_CUSTOM_ROOTS_WHEN_HOST_WHITELISTED);
     

app/MindWork AI Studio/Tools/ERIClient/ERIClientJsonContext.cs

@@ -0,0 +1,23 @@
+using System.Text.Json.Serialization;
+
+using AIStudio.Tools.ERIClient.DataModel;
+
+namespace AIStudio.Tools.ERIClient;
+
+/// <summary>
+/// The contracts with which System.Text.Json reads and writes the calls to ERI servers, built at compile time.
+/// </summary>
+[JsonSourceGenerationOptions(GenerationMode = JsonSourceGenerationMode.Metadata)]
+
+// The request:
+[JsonSerializable(typeof(RetrievalRequest))]
+
+// The answers:
+[JsonSerializable(typeof(List<AuthScheme>))]
+[JsonSerializable(typeof(AuthResponse))]
+[JsonSerializable(typeof(DataSourceInfo))]
+[JsonSerializable(typeof(List<EmbeddingInfo>))]
+[JsonSerializable(typeof(List<RetrievalInfo>))]
+[JsonSerializable(typeof(List<Context>))]
+[JsonSerializable(typeof(SecurityRequirements))]
+internal sealed partial class ERIClientJsonContext : JsonSerializerContext;

app/MindWork AI Studio/Tools/Rust/CountTokensRequest.cs

@@ -0,0 +1,6 @@
+namespace AIStudio.Tools.Rust;
+
+/// <summary>Request body used to count the tokens of a text in the Rust runtime.</summary>
+/// <param name="Text">The text to count.</param>
+/// <param name="TokenizerPath">Path of the tokenizer file to count with.</param>
+public sealed record CountTokensRequest(string Text, string TokenizerPath);

app/MindWork AI Studio/Tools/Rust/DeleteTokenizerRequest.cs

@@ -0,0 +1,5 @@
+namespace AIStudio.Tools.Rust;
+
+/// <summary>Request body used to delete the stored tokenizer of a model in the Rust runtime.</summary>
+/// <param name="ModelId">The model whose tokenizer gets deleted.</param>
+public sealed record DeleteTokenizerRequest(string ModelId);

app/MindWork AI Studio/Tools/Rust/PrepareImageForModelRequest.cs

@@ -0,0 +1,6 @@
+namespace AIStudio.Tools.Rust;
+
+/// <summary>Request body used to prepare a local image for a model in the Rust runtime.</summary>
+/// <param name="Path">Absolute path of the image.</param>
+/// <param name="MaxBytes">The size the prepared image may have at most.</param>
+public sealed record PrepareImageForModelRequest(string Path, long MaxBytes);

app/MindWork AI Studio/Tools/Rust/PrepareImageRequest.cs

@@ -0,0 +1,6 @@
+namespace AIStudio.Tools.Rust;
+
+/// <summary>Request body used to check and optionally optimize a local image in the Rust runtime.</summary>
+/// <param name="Path">Absolute path of the image.</param>
+/// <param name="Optimize">Whether the maximum-edge policy and re-encoding are applied.</param>
+public sealed record PrepareImageRequest(string Path, bool Optimize);

app/MindWork AI Studio/Tools/Rust/StoreTokenizerRequest.cs

@@ -0,0 +1,6 @@
+namespace AIStudio.Tools.Rust;
+
+/// <summary>Request body used to store a copy of a tokenizer file for a model in the Rust runtime.</summary>
+/// <param name="ModelId">The model the tokenizer belongs to.</param>
+/// <param name="FilePath">Absolute path of the tokenizer file.</param>
+public sealed record StoreTokenizerRequest(string ModelId, string FilePath);

app/MindWork AI Studio/Tools/Rust/ValidateTokenizerRequest.cs

@@ -0,0 +1,5 @@
+namespace AIStudio.Tools.Rust;
+
+/// <summary>Request body used to check a tokenizer file in the Rust runtime.</summary>
+/// <param name="FilePath">Absolute path of the tokenizer file.</param>
+public sealed record ValidateTokenizerRequest(string FilePath);

app/MindWork AI Studio/Tools/Security/PromptInjectionFinding.cs

@@ -15,17 +15,17 @@ public sealed record PromptInjectionFinding
     /// Which rule matched, e.g. "instruction_override".
     /// </summary>
     [JsonPropertyName("rule_id")]
-    public string RuleId { get; init; } = string.Empty;
+    public string RuleId { get; set; } = string.Empty;
 
     /// <summary>
     /// The rule's family, e.g. "exfiltration".
     /// </summary>
     [JsonPropertyName("category")]
-    public PromptInjectionFindingCategory Category { get; init; } = PromptInjectionFindingCategory.UNKNOWN;
+    public PromptInjectionFindingCategory Category { get; set; } = PromptInjectionFindingCategory.UNKNOWN;
 
     /// <summary>
     /// The passage as it appeared in the content, so the user can see what was removed.
     /// </summary>
     [JsonPropertyName("snippet")]
-    public string Snippet { get; init; } = string.Empty;
+    public string Snippet { get; set; } = string.Empty;
 }

app/MindWork AI Studio/Tools/Services/RustContentStreamJsonContext.cs

@@ -0,0 +1,24 @@
+using System.Text.Json.Serialization;
+
+namespace AIStudio.Tools.Services;
+
+/// <summary>
+/// The contracts with which System.Text.Json reads the events of a file extraction from the runtime, built at
+/// compile time.
+/// </summary>
+/// <remarks>
+/// A converter reads the metadata of an event as the type its JSON tells, so each of these types needs a
+/// contract of its own here. A test fails for one which is missing.
+/// </remarks>
+[JsonSourceGenerationOptions(GenerationMode = JsonSourceGenerationMode.Metadata)]
+[JsonSerializable(typeof(ContentStreamSseEvent))]
+[JsonSerializable(typeof(string))]
+[JsonSerializable(typeof(ContentStreamTextMetadata))]
+[JsonSerializable(typeof(ContentStreamPdfMetadata))]
+[JsonSerializable(typeof(ContentStreamSpreadsheetMetadata))]
+[JsonSerializable(typeof(ContentStreamPresentationMetadata))]
+[JsonSerializable(typeof(ContentStreamImageMetadata))]
+[JsonSerializable(typeof(ContentStreamDocumentMetadata))]
+[JsonSerializable(typeof(ContentStreamErrorMetadata))]
+[JsonSerializable(typeof(ContentStreamPromptInjectionMetadata))]
+internal sealed partial class RustContentStreamJsonContext : JsonSerializerContext;

app/MindWork AI Studio/Tools/Services/RustJsonContext.cs

@@ -0,0 +1,89 @@
+using System.Text.Json.Serialization;
+
+using AIStudio.Tools.Databases.VectorStore;
+using AIStudio.Tools.Rust;
+
+namespace AIStudio.Tools.Services;
+
+/// <summary>
+/// The contracts with which System.Text.Json reads and writes nearly every call to the runtime, built at
+/// compile time.
+/// </summary>
+/// <remarks>
+/// The calls to the vector store are generic: every query of its client needs the answer type with the type
+/// of its result, e.g., DatabaseQueryResponse&lt;bool?&gt;. A test fails for a request or an answer which is
+/// missing here.
+/// </remarks>
+[JsonSourceGenerationOptions(GenerationMode = JsonSourceGenerationMode.Metadata)]
+
+// The requests:
+[JsonSerializable(typeof(SelectSecretRequest))]
+[JsonSerializable(typeof(StoreSecretRequest))]
+[JsonSerializable(typeof(RustService.ShareFileRequest))]
+[JsonSerializable(typeof(PreviousDirectory))]
+[JsonSerializable(typeof(SelectFileOptions))]
+[JsonSerializable(typeof(SaveFileOptions))]
+[JsonSerializable(typeof(OpenPathRequest))]
+[JsonSerializable(typeof(OpenDocumentRequest))]
+[JsonSerializable(typeof(RegisterShortcutRequest))]
+[JsonSerializable(typeof(ValidateShortcutRequest))]
+[JsonSerializable(typeof(SetInterfaceSizeRequest))]
+[JsonSerializable(typeof(CreateMediaJobRequest))]
+[JsonSerializable(typeof(LogEventRequest))]
+[JsonSerializable(typeof(ValidateTokenizerRequest))]
+[JsonSerializable(typeof(StoreTokenizerRequest))]
+[JsonSerializable(typeof(DeleteTokenizerRequest))]
+[JsonSerializable(typeof(CountTokensRequest))]
+[JsonSerializable(typeof(PrepareImageRequest))]
+[JsonSerializable(typeof(PrepareImageForModelRequest))]
+
+// The answers:
+[JsonSerializable(typeof(RequestedSecret))]
+[JsonSerializable(typeof(StoreSecretResponse))]
+[JsonSerializable(typeof(DeleteSecretResponse))]
+[JsonSerializable(typeof(ShareFileResponse))]
+[JsonSerializable(typeof(ImagePrepareResponse))]
+[JsonSerializable(typeof(PreparedModelImage))]
+[JsonSerializable(typeof(TauriEvent))]
+[JsonSerializable(typeof(UpdateResponse))]
+[JsonSerializable(typeof(SetClipboardResponse))]
+[JsonSerializable(typeof(DirectorySelectionResponse))]
+[JsonSerializable(typeof(FileSelectionResponse))]
+[JsonSerializable(typeof(FilesSelectionResponse))]
+[JsonSerializable(typeof(FileSaveResponse))]
+[JsonSerializable(typeof(OpenPathResponse))]
+[JsonSerializable(typeof(OpenDocumentResponse))]
+[JsonSerializable(typeof(ShortcutRegistrationResult))]
+[JsonSerializable(typeof(ShortcutValidationResponse))]
+[JsonSerializable(typeof(ShortcutResponse))]
+[JsonSerializable(typeof(RuntimeInfoResponse))]
+[JsonSerializable(typeof(AppExitResponse))]
+[JsonSerializable(typeof(AppRestartResponse))]
+[JsonSerializable(typeof(InterfaceSizeResponse))]
+[JsonSerializable(typeof(CreateMediaJobResponse))]
+[JsonSerializable(typeof(MediaJobEvent))]
+[JsonSerializable(typeof(List<EnterpriseConfig>))]
+[JsonSerializable(typeof(GetLogPathsResponse))]
+[JsonSerializable(typeof(TokenizerResponse))]
+
+// The vector store, with the result of every query its client sends:
+[JsonSerializable(typeof(QdrantEdgeInfo))]
+[JsonSerializable(typeof(QdrantEdgeClientImplementation.EnsureVectorStoreRequest))]
+[JsonSerializable(typeof(QdrantEdgeClientImplementation.CheckVectorStoreRequest))]
+[JsonSerializable(typeof(QdrantEdgeClientImplementation.InsertEmbeddingRequest))]
+[JsonSerializable(typeof(QdrantEdgeClientImplementation.SearchEmbeddingRequest))]
+[JsonSerializable(typeof(QdrantEdgeClientImplementation.RetrieveVectorsRequest))]
+[JsonSerializable(typeof(QdrantEdgeClientImplementation.DeleteEmbeddingByFileRequest))]
+[JsonSerializable(typeof(QdrantEdgeClientImplementation.RelocateEmbeddingFileRequest))]
+[JsonSerializable(typeof(QdrantEdgeClientImplementation.OptimizeVectorStoreRequest))]
+[JsonSerializable(typeof(QdrantEdgeClientImplementation.DeleteVectorStoreRequest))]
+[JsonSerializable(typeof(QdrantEdgeClientImplementation.PrepareBackupRequest))]
+[JsonSerializable(typeof(QdrantEdgeClientImplementation.CopyStoreForBackupRequest))]
+[JsonSerializable(typeof(RustService.DatabaseOperationResponse))]
+[JsonSerializable(typeof(RustService.DatabaseQueryResponse<VectorStoreEnsureResult>))]
+[JsonSerializable(typeof(RustService.DatabaseQueryResponse<bool?>))]
+[JsonSerializable(typeof(RustService.DatabaseQueryResponse<List<VectorSearchResult>>))]
+[JsonSerializable(typeof(RustService.DatabaseQueryResponse<List<StoredVector>>))]
+[JsonSerializable(typeof(RustService.DatabaseQueryResponse<VectorStoreBackupPreparation>))]
+[JsonSerializable(typeof(RustService.DatabaseQueryResponse<long?>))]
+internal sealed partial class RustJsonContext : JsonSerializerContext;

app/MindWork AI Studio/Tools/Services/RustPromptInjectionJsonContext.cs

@@ -0,0 +1,16 @@
+using System.Text.Json.Serialization;
+
+using AIStudio.Tools.Rust;
+
+namespace AIStudio.Tools.Services;
+
+/// <summary>
+/// The contracts with which System.Text.Json reads and writes the calls to the prompt injection filter of the
+/// runtime, built at compile time.
+/// </summary>
+[JsonSourceGenerationOptions(GenerationMode = JsonSourceGenerationMode.Metadata)]
+[JsonSerializable(typeof(SanitizePromptInjectionsRequest))]
+[JsonSerializable(typeof(SanitizePromptInjectionsResponse))]
+[JsonSerializable(typeof(SanitizePromptInjectionsBatchRequest))]
+[JsonSerializable(typeof(SanitizePromptInjectionsBatchResponse))]
+internal sealed partial class RustPromptInjectionJsonContext : JsonSerializerContext;

app/MindWork AI Studio/Tools/Services/RustService.APIKeys.cs

@@ -63,7 +63,7 @@ public sealed partial class RustService
     private async Task<RequestedSecret> GetAPIKeyByKey(string secretKey, bool isTrying)
     {
         var secretRequest = new SelectSecretRequest(secretKey, Environment.UserName, isTrying);
-        var result = await this.http.PostAsJsonAsync("/secrets/get", secretRequest, this.jsonRustSerializerOptions);
+        var result = await this.http.PostAsJsonAsync("/secrets/get", secretRequest, JSON_OPTIONS);
         if (!result.IsSuccessStatusCode)
         {
             if(!isTrying)
@@ -71,7 +71,7 @@ public sealed partial class RustService
             return new RequestedSecret(false, new EncryptedText(string.Empty), TB("Failed to get the API key due to an API issue."));
         }
 
-        var secret = await result.Content.ReadFromJsonAsync<RequestedSecret>(this.jsonRustSerializerOptions);
+        var secret = await result.Content.ReadFromJsonAsync<RequestedSecret>(JSON_OPTIONS);
         if (secret.Success)
             this.logger!.LogDebug($"Successfully retrieved the API key for '{secretKey}'.");
         else if (isTrying)
@@ -106,14 +106,14 @@ public sealed partial class RustService
     private async Task<StoreSecretResponse> StoreEncryptedAPIKeyByKey(string secretKey, EncryptedText encryptedKey)
     {
         var request = new StoreSecretRequest(secretKey, Environment.UserName, encryptedKey);
-        var result = await this.http.PostAsJsonAsync("/secrets/store", request, this.jsonRustSerializerOptions);
+        var result = await this.http.PostAsJsonAsync("/secrets/store", request, JSON_OPTIONS);
         if (!result.IsSuccessStatusCode)
         {
             this.logger!.LogError($"Failed to store the API key for '{secretKey}' due to an API issue: '{result.StatusCode}'");
             return new StoreSecretResponse(false, TB("Failed to store the API key due to an API issue."));
         }
 
-        var state = await result.Content.ReadFromJsonAsync<StoreSecretResponse>(this.jsonRustSerializerOptions);
+        var state = await result.Content.ReadFromJsonAsync<StoreSecretResponse>(JSON_OPTIONS);
         if (!state.Success)
             this.logger!.LogError($"Failed to store the API key for '{secretKey}': '{state.Issue}'");
         else
@@ -149,14 +149,14 @@ public sealed partial class RustService
     private async Task<DeleteSecretResponse> DeleteAPIKeyByKey(string secretKey, bool isTrying = false)
     {
         var request = new SelectSecretRequest(secretKey, Environment.UserName, false);
-        var result = await this.http.PostAsJsonAsync("/secrets/delete", request, this.jsonRustSerializerOptions);
+        var result = await this.http.PostAsJsonAsync("/secrets/delete", request, JSON_OPTIONS);
         if (!result.IsSuccessStatusCode)
         {
             this.logger!.LogError($"Failed to delete the API key for '{secretKey}' due to an API issue: '{result.StatusCode}'");
             return new DeleteSecretResponse{Success = false, WasEntryFound = false, Issue = TB("Failed to delete the API key due to an API issue.")};
         }
 
-        var state = await result.Content.ReadFromJsonAsync<DeleteSecretResponse>(this.jsonRustSerializerOptions);
+        var state = await result.Content.ReadFromJsonAsync<DeleteSecretResponse>(JSON_OPTIONS);
         if (!state.Success && !isTrying)
             this.logger!.LogError($"Failed to delete the API key for '{secretKey}': '{state.Issue}'");
 

app/MindWork AI Studio/Tools/Services/RustService.App.cs

@@ -122,7 +122,7 @@ public sealed partial class RustService
 
     public async Task<RuntimeInfoResponse> GetRuntimeInfo()
     {
-        var response = await this.http.GetFromJsonAsync<RuntimeInfoResponse>("/system/runtime/info", this.jsonRustSerializerOptions);
+        var response = await this.http.GetFromJsonAsync<RuntimeInfoResponse>("/system/runtime/info", JSON_OPTIONS);
         return response;
     }
 
@@ -140,7 +140,7 @@ public sealed partial class RustService
                 return false;
             }
 
-            var result = await response.Content.ReadFromJsonAsync<AppExitResponse>(this.jsonRustSerializerOptions);
+            var result = await response.Content.ReadFromJsonAsync<AppExitResponse>(JSON_OPTIONS);
             if (result is null || !result.Success)
             {
                 this.logger?.LogError("Failed to exit the app: {Error}", result?.ErrorMessage ?? "Unknown error");
@@ -177,7 +177,7 @@ public sealed partial class RustService
                 return false;
             }
 
-            var result = await response.Content.ReadFromJsonAsync<AppRestartResponse>(this.jsonRustSerializerOptions);
+            var result = await response.Content.ReadFromJsonAsync<AppRestartResponse>(JSON_OPTIONS);
             if (result is null || !result.Success)
             {
                 this.logger?.LogError("Failed to restart the app: {Error}", result?.ErrorMessage ?? "Unknown error");
@@ -203,7 +203,7 @@ public sealed partial class RustService
     {
         try
         {
-            var response = await this.http.PostAsJsonAsync("/app/interface-size", request, this.jsonRustSerializerOptions);
+            var response = await this.http.PostAsJsonAsync("/app/interface-size", request, JSON_OPTIONS);
             var result = await this.ReadInterfaceSizeResponse(response, "set the interface size");
             if (result is not null)
                 this.logger?.LogInformation("Set the interface sizes of {ScreenCount} screens. AI Studio shows with the size '{Size}' at {CurrentPercent} % and a zoom of {Zoom:0.###} on the screen '{ScreenKey}'.", request.Screens.Count, result.Size, result.CurrentPercent, result.Zoom, result.ScreenKey);
@@ -243,7 +243,7 @@ public sealed partial class RustService
             return null;
         }
 
-        var result = await response.Content.ReadFromJsonAsync<InterfaceSizeResponse>(this.jsonRustSerializerOptions);
+        var result = await response.Content.ReadFromJsonAsync<InterfaceSizeResponse>(JSON_OPTIONS);
         if (result is null || !result.Success)
         {
             this.logger?.LogError("Failed to {Action}: {Error}", action, result?.ErrorMessage ?? "Unknown error");

app/MindWork AI Studio/Tools/Services/RustService.Clipboard.cs

@@ -28,7 +28,7 @@ public sealed partial class RustService
                 return;
             }
 
-            var state = await response.Content.ReadFromJsonAsync<SetClipboardResponse>(this.jsonRustSerializerOptions);
+            var state = await response.Content.ReadFromJsonAsync<SetClipboardResponse>(JSON_OPTIONS);
             if (!state.Success)
             {
                 this.logger!.LogError("Failed to copy the text to the clipboard.");

app/MindWork AI Studio/Tools/Services/RustService.Databases.cs

@@ -24,7 +24,7 @@ public sealed partial class RustService
             using var cts = CancellationTokenSource.CreateLinkedTokenSource(cancellationToken);
             cts.CancelAfter(TimeSpan.FromSeconds(45));
 
-            var databaseInfo = await this.http.GetFromJsonAsync<TDatabaseInfo>(infoPath, this.jsonRustSerializerOptions, cts.Token);
+            var databaseInfo = await this.http.GetFromJsonAsync<TDatabaseInfo>(infoPath, JSON_OPTIONS, cts.Token);
             return databaseInfo ?? unavailableFactory("The database information response was empty.");
         }
         catch (OperationCanceledException) when (cancellationToken.IsCancellationRequested)
@@ -52,10 +52,10 @@ public sealed partial class RustService
         using var cts = CancellationTokenSource.CreateLinkedTokenSource(cancellationToken);
         cts.CancelAfter(TimeSpan.FromMinutes(5));
 
-        using var response = await this.http.PostAsJsonAsync(path, request, this.jsonRustSerializerOptions, cts.Token);
+        using var response = await this.http.PostAsJsonAsync(path, request, JSON_OPTIONS, cts.Token);
         response.EnsureSuccessStatusCode();
 
-        var operation = await response.Content.ReadFromJsonAsync<DatabaseOperationResponse>(this.jsonRustSerializerOptions, cts.Token);
+        var operation = await response.Content.ReadFromJsonAsync<DatabaseOperationResponse>(JSON_OPTIONS, cts.Token);
         if (operation is not { Success: true })
             throw CreateDatabaseException(operation?.Issue, operation?.IssueCode, $"The {databaseName} operation failed.");
     }
@@ -65,10 +65,10 @@ public sealed partial class RustService
         using var cts = CancellationTokenSource.CreateLinkedTokenSource(cancellationToken);
         cts.CancelAfter(TimeSpan.FromMinutes(5));
 
-        using var response = await this.http.PostAsJsonAsync(path, request, this.jsonRustSerializerOptions, cts.Token);
+        using var response = await this.http.PostAsJsonAsync(path, request, JSON_OPTIONS, cts.Token);
         response.EnsureSuccessStatusCode();
 
-        var operation = await response.Content.ReadFromJsonAsync<DatabaseQueryResponse<TResult>>(this.jsonRustSerializerOptions, cts.Token);
+        var operation = await response.Content.ReadFromJsonAsync<DatabaseQueryResponse<TResult>>(JSON_OPTIONS, cts.Token);
         if (operation is not { Success: true })
             throw CreateDatabaseException(operation?.Issue, operation?.IssueCode, $"The {databaseName} query failed.");
 
@@ -94,7 +94,10 @@ public sealed partial class RustService
         };
     }
 
-    private sealed record DatabaseOperationResponse(bool Success, string Issue, string IssueCode);
+    //
+    // Internal rather than private, so that the JSON context of the runtime can name them:
+    //
+    internal sealed record DatabaseOperationResponse(bool Success, string Issue, string IssueCode);
 
-    private sealed record DatabaseQueryResponse<TResult>(bool Success, string Issue, string IssueCode, TResult? Data);
+    internal sealed record DatabaseQueryResponse<TResult>(bool Success, string Issue, string IssueCode, TResult? Data);
 }

app/MindWork AI Studio/Tools/Services/RustService.Enterprise.cs

@@ -39,7 +39,7 @@ public sealed partial class RustService
             throw new HttpRequestException($"Failed to query the enterprise configurations: '{result.StatusCode}'");
         }
 
-        var configs = await result.Content.ReadFromJsonAsync<List<EnterpriseConfig>>(this.jsonRustSerializerOptions);
+        var configs = await result.Content.ReadFromJsonAsync<List<EnterpriseConfig>>(JSON_OPTIONS);
         if (configs is null)
             throw new InvalidOperationException("Failed to parse the enterprise configurations from Rust.");
 

app/MindWork AI Studio/Tools/Services/RustService.Events.cs

@@ -35,7 +35,7 @@ public partial class RustService
                             continue;
                         
                         // Deserialize the Tauri event:
-                        var tauriEvent = JsonSerializer.Deserialize<TauriEvent>(line, this.jsonRustSerializerOptions);
+                        var tauriEvent = JsonSerializer.Deserialize<TauriEvent>(line, JSON_OPTIONS);
                         
                         // Forward relevant events to the message bus:
                         if (tauriEvent != default && tauriEvent.EventType

app/MindWork AI Studio/Tools/Services/RustService.FileSystem.cs

@@ -16,10 +16,10 @@ public sealed partial class RustService
                 var startDirectory = initialDirectory is null ? null : PathTools.FindNearestExistingPath(initialDirectory);
                 var result = startDirectory is null
                     ? await this.http.PostAsync($"/select/directory?title={encodedTitle}", null)
-                    : await this.http.PostAsJsonAsync($"/select/directory?title={encodedTitle}", new PreviousDirectory(startDirectory), this.jsonRustSerializerOptions);
+                    : await this.http.PostAsJsonAsync($"/select/directory?title={encodedTitle}", new PreviousDirectory(startDirectory), JSON_OPTIONS);
 
                 if (result.IsSuccessStatusCode)
-                    return await result.Content.ReadFromJsonAsync<DirectorySelectionResponse>(this.jsonRustSerializerOptions);
+                    return await result.Content.ReadFromJsonAsync<DirectorySelectionResponse>(JSON_OPTIONS);
 
                 this.logger!.LogError("Failed to select a directory: '{StatusCode}'", result.StatusCode);
                 return new DirectorySelectionResponse(true, string.Empty);
@@ -63,9 +63,9 @@ public sealed partial class RustService
                     Filter = FileTypes.ToFileDialogFilter(filter)
                 };
 
-                var result = await this.http.PostAsJsonAsync("/select/file", payload, this.jsonRustSerializerOptions);
+                var result = await this.http.PostAsJsonAsync("/select/file", payload, JSON_OPTIONS);
                 if (result.IsSuccessStatusCode)
-                    return await result.Content.ReadFromJsonAsync<FileSelectionResponse>(this.jsonRustSerializerOptions);
+                    return await result.Content.ReadFromJsonAsync<FileSelectionResponse>(JSON_OPTIONS);
 
                 this.logger!.LogError("Failed to select a file: '{StatusCode}'", result.StatusCode);
                 return new FileSelectionResponse(true, string.Empty);
@@ -87,9 +87,9 @@ public sealed partial class RustService
                     Filter = FileTypes.ToFileDialogFilter(filter)
                 };
 
-                var result = await this.http.PostAsJsonAsync("/select/files", payload, this.jsonRustSerializerOptions);
+                var result = await this.http.PostAsJsonAsync("/select/files", payload, JSON_OPTIONS);
                 if (result.IsSuccessStatusCode)
-                    return await result.Content.ReadFromJsonAsync<FilesSelectionResponse>(this.jsonRustSerializerOptions);
+                    return await result.Content.ReadFromJsonAsync<FilesSelectionResponse>(JSON_OPTIONS);
 
                 this.logger!.LogError("Failed to select files: '{StatusCode}'", result.StatusCode);
                 return new FilesSelectionResponse(true, Array.Empty<string>());
@@ -118,9 +118,9 @@ public sealed partial class RustService
                     Filter = FileTypes.ToFileDialogFilter(filter)
                 };
 
-                var result = await this.http.PostAsJsonAsync("/save/file", payload, this.jsonRustSerializerOptions);
+                var result = await this.http.PostAsJsonAsync("/save/file", payload, JSON_OPTIONS);
                 if (result.IsSuccessStatusCode)
-                    return await result.Content.ReadFromJsonAsync<FileSaveResponse>(this.jsonRustSerializerOptions);
+                    return await result.Content.ReadFromJsonAsync<FileSaveResponse>(JSON_OPTIONS);
 
                 this.logger!.LogError("Failed to select a file for writing operation: '{StatusCode}'", result.StatusCode);
                 return new FileSaveResponse(true, string.Empty);
@@ -133,7 +133,7 @@ public sealed partial class RustService
         HttpResponseMessage result;
         try
         {
-            result = await this.http.PostAsJsonAsync("/open/path", new OpenPathRequest(path), this.jsonRustSerializerOptions);
+            result = await this.http.PostAsJsonAsync("/open/path", new OpenPathRequest(path), JSON_OPTIONS);
         }
         catch (HttpRequestException e)
         {
@@ -154,7 +154,7 @@ public sealed partial class RustService
                 return new OpenPathResponse(false, string.Format(TB("The runtime file manager endpoint returned '{0}'."), result.StatusCode));
             }
 
-            var response = await result.Content.ReadFromJsonAsync<OpenPathResponse>(this.jsonRustSerializerOptions);
+            var response = await result.Content.ReadFromJsonAsync<OpenPathResponse>(JSON_OPTIONS);
             var normalizedResponse = response.Success
                 ? response
                 : new OpenPathResponse(false, string.IsNullOrWhiteSpace(response.Issue) ? TB("The runtime file manager endpoint failed without details.") : response.Issue);
@@ -187,7 +187,7 @@ public sealed partial class RustService
         HttpResponseMessage result;
         try
         {
-            result = await this.http.PostAsJsonAsync("/open/document", new OpenDocumentRequest(path, pageNumber), this.jsonRustSerializerOptions);
+            result = await this.http.PostAsJsonAsync("/open/document", new OpenDocumentRequest(path, pageNumber), JSON_OPTIONS);
         }
         catch (HttpRequestException e)
         {
@@ -208,7 +208,7 @@ public sealed partial class RustService
                 return new OpenDocumentResponse(false, false, string.Format(TB("The runtime document endpoint returned '{0}'."), result.StatusCode));
             }
 
-            var response = await result.Content.ReadFromJsonAsync<OpenDocumentResponse>(this.jsonRustSerializerOptions);
+            var response = await result.Content.ReadFromJsonAsync<OpenDocumentResponse>(JSON_OPTIONS);
             if (response.Success)
             {
                 //

app/MindWork AI Studio/Tools/Services/RustService.Image.cs

@@ -20,10 +20,10 @@ public sealed partial class RustService
         bool optimize,
         CancellationToken token = default)
     {
-        using var response = await this.http.PostAsJsonAsync("/image/prepare", new { path, optimize }, this.jsonRustSerializerOptions, token);
+        using var response = await this.http.PostAsJsonAsync("/image/prepare", new PrepareImageRequest(path, optimize), JSON_OPTIONS, token);
         response.EnsureSuccessStatusCode();
 
-        return await response.Content.ReadFromJsonAsync<ImagePrepareResponse>(this.jsonRustSerializerOptions, token)
+        return await response.Content.ReadFromJsonAsync<ImagePrepareResponse>(JSON_OPTIONS, token)
             ?? throw new InvalidDataException("The Rust image preparation returned an empty response.");
     }
 
@@ -44,10 +44,10 @@ public sealed partial class RustService
     {
         try
         {
-            using var response = await this.http.PostAsJsonAsync("/image/prepare-for-model", new { path, maxBytes }, this.jsonRustSerializerOptions, token);
+            using var response = await this.http.PostAsJsonAsync("/image/prepare-for-model", new PrepareImageForModelRequest(path, maxBytes), JSON_OPTIONS, token);
             response.EnsureSuccessStatusCode();
 
-            return await response.Content.ReadFromJsonAsync<PreparedModelImage>(this.jsonRustSerializerOptions, token)
+            return await response.Content.ReadFromJsonAsync<PreparedModelImage>(JSON_OPTIONS, token)
                 ?? PreparedModelImage.Failed(ModelImageErrorCode.UNKNOWN);
         }
         catch (Exception e) when (e is not OperationCanceledException)

app/MindWork AI Studio/Tools/Services/RustService.Log.cs

@@ -10,7 +10,7 @@ public sealed partial class RustService
     /// <returns>The paths of the log files.</returns>
     public async Task<GetLogPathsResponse> GetLogPaths()
     {
-        return await this.http.GetFromJsonAsync<GetLogPathsResponse>("/log/paths", this.jsonRustSerializerOptions);
+        return await this.http.GetFromJsonAsync<GetLogPathsResponse>("/log/paths", JSON_OPTIONS);
     }
 
     /// <summary>
@@ -33,7 +33,7 @@ public sealed partial class RustService
             // feed itself. The unobserved task exception handler in Program.cs remains the safety net here.
             //
             var request = new LogEventRequest(timestamp, level, category, message, exception, stackTrace);
-            _ = this.http.PostAsJsonAsync("/log/event", request, this.jsonRustSerializerOptions);
+            _ = this.http.PostAsJsonAsync("/log/event", request, JSON_OPTIONS);
         }
         catch
         {

app/MindWork AI Studio/Tools/Services/RustService.Media.cs

@@ -18,11 +18,11 @@ public partial class RustService
         using var response = await this.http.PostAsJsonAsync(
             "/media/jobs",
             new CreateMediaJobRequest(inputPath, outputPath, OpusBitrateBps: opusBitrateBps),
-            this.jsonRustSerializerOptions,
+            JSON_OPTIONS,
             token);
 
         response.EnsureSuccessStatusCode();
-        var result = await response.Content.ReadFromJsonAsync<CreateMediaJobResponse>(this.jsonRustSerializerOptions, token);
+        var result = await response.Content.ReadFromJsonAsync<CreateMediaJobResponse>(JSON_OPTIONS, token);
         return result?.JobId ?? throw new InvalidOperationException("The Rust runtime did not return a media job ID.");
     }
 
@@ -49,7 +49,7 @@ public partial class RustService
                 continue;
 
             var json = line["data:".Length..].Trim();
-            var mediaEvent = JsonSerializer.Deserialize<MediaJobEvent>(json, this.jsonRustSerializerOptions);
+            var mediaEvent = JsonSerializer.Deserialize<MediaJobEvent>(json, JSON_OPTIONS);
             if (mediaEvent is not null)
                 yield return mediaEvent;
 

app/MindWork AI Studio/Tools/Services/RustService.Retrieval.cs

@@ -112,7 +112,7 @@ public sealed partial class RustService
 
                 try
                 {
-                    var sseEvent = JsonSerializer.Deserialize<ContentStreamSseEvent>(jsonContent);
+                    var sseEvent = JsonSerializer.Deserialize<ContentStreamSseEvent>(jsonContent, CONTENT_STREAM_JSON_OPTIONS);
                     if (sseEvent is null)
                         continue;
 
@@ -364,7 +364,7 @@ public sealed partial class RustService
                 ContentStreamSseEvent? sseEvent = null;
                 try
                 {
-                    sseEvent = JsonSerializer.Deserialize<ContentStreamSseEvent>(jsonContent);
+                    sseEvent = JsonSerializer.Deserialize<ContentStreamSseEvent>(jsonContent, CONTENT_STREAM_JSON_OPTIONS);
                 }
                 catch (JsonException)
                 {
@@ -460,7 +460,7 @@ public sealed partial class RustService
     {
         try
         {
-            var errorMessage = JsonSerializer.Deserialize<string>(jsonContent);
+            var errorMessage = JsonSerializer.Deserialize<string>(jsonContent, CONTENT_STREAM_JSON_OPTIONS);
             if (string.IsNullOrWhiteSpace(errorMessage))
                 return false;
 

app/MindWork AI Studio/Tools/Services/RustService.Secrets.cs

@@ -65,14 +65,14 @@ public sealed partial class RustService
         var secretKey = SecretKey(secretId, storeType);
         var encryptedSecret = await this.encryptor!.Encrypt(secretData);
         var request = new StoreSecretRequest(secretKey, Environment.UserName, encryptedSecret);
-        var result = await this.http.PostAsJsonAsync("/secrets/store", request, this.jsonRustSerializerOptions);
+        var result = await this.http.PostAsJsonAsync("/secrets/store", request, JSON_OPTIONS);
         if (!result.IsSuccessStatusCode)
         {
             this.logger!.LogError($"Failed to store the secret data for '{secretKey}' due to an API issue: '{result.StatusCode}'");
             return new StoreSecretResponse(false, TB("Failed to store the secret data due to an API issue."));
         }
         
-        var state = await result.Content.ReadFromJsonAsync<StoreSecretResponse>(this.jsonRustSerializerOptions);
+        var state = await result.Content.ReadFromJsonAsync<StoreSecretResponse>(JSON_OPTIONS);
         if (!state.Success)
             this.logger!.LogError($"Failed to store the secret data for '{secretKey}': '{state.Issue}'");
 
@@ -104,7 +104,7 @@ public sealed partial class RustService
     private async Task<RequestedSecret> GetSecretByKey(string secretKey, bool isTrying)
     {
         var secretRequest = new SelectSecretRequest(secretKey, Environment.UserName, isTrying);
-        var result = await this.http.PostAsJsonAsync("/secrets/get", secretRequest, this.jsonRustSerializerOptions);
+        var result = await this.http.PostAsJsonAsync("/secrets/get", secretRequest, JSON_OPTIONS);
         if (!result.IsSuccessStatusCode)
         {
             if(isTrying)
@@ -114,7 +114,7 @@ public sealed partial class RustService
             return new RequestedSecret(false, new EncryptedText(string.Empty), TB("Failed to get the secret data due to an API issue."));
         }
 
-        var state = await result.Content.ReadFromJsonAsync<RequestedSecret>(this.jsonRustSerializerOptions);
+        var state = await result.Content.ReadFromJsonAsync<RequestedSecret>(JSON_OPTIONS);
         if (!state.Success)
         {
             //
@@ -138,14 +138,14 @@ public sealed partial class RustService
     private async Task<DeleteSecretResponse> DeleteSecretByKey(string secretKey)
     {
         var request = new SelectSecretRequest(secretKey, Environment.UserName, false);
-        var result = await this.http.PostAsJsonAsync("/secrets/delete", request, this.jsonRustSerializerOptions);
+        var result = await this.http.PostAsJsonAsync("/secrets/delete", request, JSON_OPTIONS);
         if (!result.IsSuccessStatusCode)
         {
             this.logger!.LogError($"Failed to delete the secret data for '{secretKey}' due to an API issue: '{result.StatusCode}'");
             return new DeleteSecretResponse{Success = false, WasEntryFound = false, Issue = TB("Failed to delete the secret data due to an API issue.")};
         }
         
-        var state = await result.Content.ReadFromJsonAsync<DeleteSecretResponse>(this.jsonRustSerializerOptions);
+        var state = await result.Content.ReadFromJsonAsync<DeleteSecretResponse>(JSON_OPTIONS);
         if (!state.Success)
             this.logger!.LogError($"Failed to delete the secret data for '{secretKey}': '{state.Issue}'");
         

app/MindWork AI Studio/Tools/Services/RustService.Security.cs

@@ -40,7 +40,8 @@ public sealed partial class RustService
             using var response = await this.http.PostAsJsonAsync(
                 "/security/prompt-injection/sanitize",
                 new SanitizePromptInjectionsRequest(text),
-                cancellationToken: timeoutTokenSource.Token);
+                PROMPT_INJECTION_JSON_OPTIONS,
+                timeoutTokenSource.Token);
 
             if (!response.IsSuccessStatusCode)
             {
@@ -48,7 +49,7 @@ public sealed partial class RustService
                 return null;
             }
 
-            return await response.Content.ReadFromJsonAsync<SanitizePromptInjectionsResponse>(timeoutTokenSource.Token);
+            return await response.Content.ReadFromJsonAsync<SanitizePromptInjectionsResponse>(PROMPT_INJECTION_JSON_OPTIONS, timeoutTokenSource.Token);
         }
         catch (Exception exception)
         {
@@ -82,7 +83,8 @@ public sealed partial class RustService
             using var response = await this.http.PostAsJsonAsync(
                 "/security/prompt-injection/sanitize-batch",
                 new SanitizePromptInjectionsBatchRequest(texts),
-                cancellationToken: timeoutTokenSource.Token);
+                PROMPT_INJECTION_JSON_OPTIONS,
+                timeoutTokenSource.Token);
 
             if (!response.IsSuccessStatusCode)
             {
@@ -90,7 +92,7 @@ public sealed partial class RustService
                 return null;
             }
 
-            var batchResponse = await response.Content.ReadFromJsonAsync<SanitizePromptInjectionsBatchResponse>(timeoutTokenSource.Token);
+            var batchResponse = await response.Content.ReadFromJsonAsync<SanitizePromptInjectionsBatchResponse>(PROMPT_INJECTION_JSON_OPTIONS, timeoutTokenSource.Token);
             if (batchResponse.Results is null || batchResponse.Results.Count != texts.Count)
             {
                 this.logger?.LogError("The prompt injection filter answered with {ResultCount} result(s) for {TextCount} text(s).", batchResponse.Results?.Count ?? 0, texts.Count);

app/MindWork AI Studio/Tools/Services/RustService.Share.cs

@@ -1,4 +1,4 @@
-// ReSharper disable NotAccessedPositionalProperty.Local
+// ReSharper disable NotAccessedPositionalProperty.Global
 using AIStudio.Tools.Rust;
 
 namespace AIStudio.Tools.Services;
@@ -14,14 +14,14 @@ public sealed partial class RustService
     {
         try
         {
-            using var response = await this.http.PostAsJsonAsync("/share/file", new ShareFileRequest(filePath), this.jsonRustSerializerOptions);
+            using var response = await this.http.PostAsJsonAsync("/share/file", new ShareFileRequest(filePath), JSON_OPTIONS);
             if (!response.IsSuccessStatusCode)
             {
                 this.logger?.LogError($"The Rust runtime rejected the share request: {response.StatusCode}.");
                 return new(ShareSheetOutcome.FAILED, $"The Rust runtime rejected the share request: {response.StatusCode}.");
             }
 
-            var result = await response.Content.ReadFromJsonAsync<ShareFileResponse>(this.jsonRustSerializerOptions);
+            var result = await response.Content.ReadFromJsonAsync<ShareFileResponse>(JSON_OPTIONS);
             if (result is null)
             {
                 this.logger?.LogError("The Rust runtime answered the share request without a result.");
@@ -50,5 +50,8 @@ public sealed partial class RustService
         }
     }
 
-    private sealed record ShareFileRequest(string FilePath);
+    /// <remarks>
+    /// Internal rather than private, so that the JSON context of the runtime can name it.
+    /// </remarks>
+    internal sealed record ShareFileRequest(string FilePath);
 }