Added Requesty as a provider (#1006)

Co-authored-by: Thorsten Sommer <SommerEngineering@users.noreply.github.com>

app/MindWork AI Studio/Provider/AlibabaCloud/ProviderAlibabaCloud.cs

@@ -66,7 +66,7 @@ public sealed class ProviderAlibabaCloud() : BaseProvider(LLMProviders.ALIBABA_C
         return Task.FromResult(TranscriptionResult.Failure());
     }
     
-    /// <inhertidoc />
+    /// <inheritdoc />
     public override async Task<IReadOnlyList<IReadOnlyList<float>>> EmbedTextAsync(Model embeddingModel, SettingsManager settingsManager, CancellationToken token = default, params List<string> texts)
     {
         var requestedSecret = await Program.RUST_SERVICE.GetAPIKey(this, SecretStoreType.EMBEDDING_PROVIDER);

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

@@ -191,7 +191,7 @@ public sealed class ProviderAnthropic() : BaseProvider(LLMProviders.ANTHROPIC, n
         return Task.FromResult(TranscriptionResult.Failure());
     }
     
-    /// <inhertidoc />
+    /// <inheritdoc />
     public override Task<IReadOnlyList<IReadOnlyList<float>>> EmbedTextAsync(Model embeddingModel, SettingsManager settingsManager, CancellationToken token = default, params List<string> texts)
     {
         throw this.CreateEmbeddingsNotSupportedException();

app/MindWork AI Studio/Provider/DeepSeek/ProviderDeepSeek.cs

@@ -66,7 +66,7 @@ public sealed class ProviderDeepSeek() : BaseProvider(LLMProviders.DEEP_SEEK, ne
         return Task.FromResult(TranscriptionResult.Failure());
     }
     
-    /// <inhertidoc />
+    /// <inheritdoc />
     public override Task<IReadOnlyList<IReadOnlyList<float>>> EmbedTextAsync(Model embeddingModel, SettingsManager settingsManager, CancellationToken token = default, params List<string> texts)
     {
         throw this.CreateEmbeddingsNotSupportedException();

app/MindWork AI Studio/Provider/Fireworks/ProviderFireworks.cs

@@ -68,7 +68,7 @@ public class ProviderFireworks() : BaseProvider(LLMProviders.FIREWORKS, new Uri(
         return await this.PerformStandardTranscriptionRequest(requestedSecret, transcriptionModel, audioFilePath, token: token);
     }
     
-    /// <inhertidoc />
+    /// <inheritdoc />
     public override Task<IReadOnlyList<IReadOnlyList<float>>> EmbedTextAsync(Model embeddingModel, SettingsManager settingsManager, CancellationToken token = default, params List<string> texts)
     {
         throw this.CreateEmbeddingsNotSupportedException();

app/MindWork AI Studio/Provider/GWDG/ProviderGWDG.cs

@@ -81,7 +81,7 @@ public sealed class ProviderGWDG() : BaseProvider(LLMProviders.GWDG, new Uri("ht
         return await this.PerformStandardTranscriptionRequest(requestedSecret, transcriptionModel, audioFilePath, token: token);
     }
     
-    /// <inhertidoc />
+    /// <inheritdoc />
     public override async Task<IReadOnlyList<IReadOnlyList<float>>> EmbedTextAsync(Model embeddingModel, SettingsManager settingsManager, CancellationToken token = default, params List<string> texts)
     {
         var requestedSecret = await Program.RUST_SERVICE.GetAPIKey(this, SecretStoreType.EMBEDDING_PROVIDER);

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

@@ -69,7 +69,7 @@ public class ProviderGoogle() : BaseProvider(LLMProviders.GOOGLE, new Uri("https
         return Task.FromResult(TranscriptionResult.Failure());
     }
     
-    /// <inhertidoc />
+    /// <inheritdoc />
     public override async Task<IReadOnlyList<IReadOnlyList<float>>> EmbedTextAsync(Model embeddingModel, SettingsManager settingsManager, CancellationToken token = default, params List<string> texts)
     {
         var requestedSecret = await Program.RUST_SERVICE.GetAPIKey(this, SecretStoreType.EMBEDDING_PROVIDER);

app/MindWork AI Studio/Provider/Groq/ProviderGroq.cs

@@ -72,7 +72,7 @@ public class ProviderGroq() : BaseProvider(LLMProviders.GROQ, new Uri("https://a
         return await this.PerformStandardTranscriptionRequest(requestedSecret, transcriptionModel, audioFilePath, token: token);
     }
     
-    /// <inhertidoc />
+    /// <inheritdoc />
     public override Task<IReadOnlyList<IReadOnlyList<float>>> EmbedTextAsync(Model embeddingModel, SettingsManager settingsManager, CancellationToken token = default, params List<string> texts)
     {
         throw this.CreateEmbeddingsNotSupportedException();

app/MindWork AI Studio/Provider/Helmholtz/ProviderHelmholtz.cs

@@ -69,7 +69,7 @@ public sealed class ProviderHelmholtz() : BaseProvider(LLMProviders.HELMHOLTZ, n
         return await this.PerformStandardTranscriptionRequest(requestedSecret, transcriptionModel, audioFilePath, token: token);
     }
     
-    /// <inhertidoc />
+    /// <inheritdoc />
     public override async Task<IReadOnlyList<IReadOnlyList<float>>> EmbedTextAsync(Model embeddingModel, SettingsManager settingsManager, CancellationToken token = default, params List<string> texts)
     {
         var requestedSecret = await Program.RUST_SERVICE.GetAPIKey(this, SecretStoreType.EMBEDDING_PROVIDER);

app/MindWork AI Studio/Provider/HuggingFace/ProviderHuggingFace.cs

@@ -217,7 +217,7 @@ public sealed class ProviderHuggingFace : BaseProvider
         return await this.PerformStandardTranscriptionRequest(requestedSecret, transcriptionModel, audioFilePath, token: token);
     }
     
-    /// <inhertidoc />
+    /// <inheritdoc />
     public override async Task<IReadOnlyList<IReadOnlyList<float>>> EmbedTextAsync(Model embeddingModel, SettingsManager settingsManager, CancellationToken token = default, params List<string> texts)
     {
         var requestedSecret = await Program.RUST_SERVICE.GetAPIKey(this, SecretStoreType.EMBEDDING_PROVIDER);

app/MindWork AI Studio/Provider/IONOS/ProviderIONOS.cs

@@ -74,7 +74,7 @@ public sealed class ProviderIONOS() : BaseProvider(LLMProviders.IONOS, new Uri("
         return Task.FromResult(TranscriptionResult.Failure());
     }
 
-    /// <inhertidoc />
+    /// <inheritdoc />
     public override async Task<IReadOnlyList<IReadOnlyList<float>>> EmbedTextAsync(Model embeddingModel, SettingsManager settingsManager, CancellationToken token = default, params List<string> texts)
     {
         var requestedSecret = await Program.RUST_SERVICE.GetAPIKey(this, SecretStoreType.EMBEDDING_PROVIDER);

app/MindWork AI Studio/Provider/LLMProviders.cs

@@ -19,6 +19,7 @@ public enum LLMProviders
     HETZNER = 16,
     IONOS = 17,
     LITE_LLM = 18,
+    REQUESTY = 19,
 
     FIREWORKS = 5,
     GROQ = 6,

app/MindWork AI Studio/Provider/LLMProvidersExtensions.cs

@@ -14,6 +14,7 @@ using AIStudio.Provider.Mistral;
 using AIStudio.Provider.OpenAI;
 using AIStudio.Provider.OpenRouter;
 using AIStudio.Provider.Perplexity;
+using AIStudio.Provider.Requesty;
 using AIStudio.Provider.SelfHosted;
 using AIStudio.Provider.X;
 using AIStudio.Settings;
@@ -62,6 +63,7 @@ public static class LLMProvidersExtensions
         LLMProviders.HETZNER => "Hetzner (Experimental)",
         LLMProviders.IONOS => "IONOS",
         LLMProviders.LITE_LLM => "LiteLLM",
+        LLMProviders.REQUESTY => "Requesty",
 
         LLMProviders.GROQ => "Groq",
         LLMProviders.FIREWORKS => "Fireworks.ai",
@@ -100,6 +102,7 @@ public static class LLMProvidersExtensions
         LLMProviders.HETZNER => "Hetzner",
         LLMProviders.IONOS => "IONOS",
         LLMProviders.LITE_LLM => "LiteLLM",
+        LLMProviders.REQUESTY => "Requesty",
 
         LLMProviders.GROQ => "Groq",
         LLMProviders.FIREWORKS => "Fireworks.ai",
@@ -170,6 +173,18 @@ public static class LLMProvidersExtensions
         // of a self-hosted model here and let the user assign the level themselves.
         LLMProviders.LITE_LLM => Confidence.USER_OPERATED_GATEWAY.WithSources("https://docs.litellm.ai/docs/data_security").WithLevel(settingsManager.GetConfiguredConfidenceLevel(llmProvider)),
 
+        // Requesty Ltd is based in London and works under the UK GDPR and the EU GDPR. Unless logging
+        // is switched off, it keeps requests for up to 30 days, and it may use the content of free
+        // accounts for training. Where a model runs depends on the model rather than on Requesty:
+        // names ending in "@eu" or in another European region stay in Europe, the others may not.
+        // That is why we state the region but leave the trust level unknown.
+        LLMProviders.REQUESTY => Confidence.UNKNOWN.WithRegion("Europe, United Kingdom").WithSources(
+            "https://www.requesty.ai/privacy",
+            "https://www.requesty.ai/privacy/subprocessors",
+            "https://www.requesty.ai/dpa",
+            "https://www.requesty.ai/terms"
+        ).WithLevel(settingsManager.GetConfiguredConfidenceLevel(llmProvider)),
+
         LLMProviders.SELF_HOSTED => Confidence.SELF_HOSTED.WithLevel(settingsManager.GetConfiguredConfidenceLevel(llmProvider)),
         
         LLMProviders.HELMHOLTZ => Confidence.GDPR_NO_TRAINING.WithRegion("Europe, Germany").WithSources("https://helmholtz.cloud/services/?serviceID=d7d5c597-a2f6-4bd1-b71e-4d6499d98570").WithLevel(settingsManager.GetConfiguredConfidenceLevel(llmProvider)),
@@ -197,6 +212,7 @@ public static class LLMProvidersExtensions
         LLMProviders.GWDG => true,
         LLMProviders.OPEN_ROUTER => true,
         LLMProviders.LITE_LLM => true,
+        LLMProviders.REQUESTY => true,
 
         //
         // Providers that do not support embeddings:
@@ -237,6 +253,7 @@ public static class LLMProvidersExtensions
         LLMProviders.HELMHOLTZ => true,
         LLMProviders.GROQ => true,
         LLMProviders.LITE_LLM => true,
+        LLMProviders.REQUESTY => true,
 
         //
         // Providers that support transcription but provide no OpenAI-compatible API yet:
@@ -319,6 +336,7 @@ public static class LLMProvidersExtensions
                 LLMProviders.HETZNER => new ProviderHetzner { InstanceName = instanceName, ConfiguredProviderId = configuredProviderId, AdditionalJsonApiParameters = expertProviderApiParameter, TokenizerPath = tokenizerPath, IsEnterpriseConfiguration = isEnterpriseConfiguration },
                 LLMProviders.IONOS => new ProviderIONOS { InstanceName = instanceName, ConfiguredProviderId = configuredProviderId, AdditionalJsonApiParameters = expertProviderApiParameter, TokenizerPath = tokenizerPath, IsEnterpriseConfiguration = isEnterpriseConfiguration },
                 LLMProviders.LITE_LLM => new ProviderLiteLLM(hostname) { InstanceName = instanceName, ConfiguredProviderId = configuredProviderId, AdditionalJsonApiParameters = expertProviderApiParameter, TokenizerPath = tokenizerPath, IsEnterpriseConfiguration = isEnterpriseConfiguration },
+                LLMProviders.REQUESTY => new ProviderRequesty { InstanceName = instanceName, ConfiguredProviderId = configuredProviderId, AdditionalJsonApiParameters = expertProviderApiParameter, TokenizerPath = tokenizerPath, IsEnterpriseConfiguration = isEnterpriseConfiguration },
 
                 LLMProviders.GROQ => new ProviderGroq { InstanceName = instanceName, ConfiguredProviderId = configuredProviderId, AdditionalJsonApiParameters = expertProviderApiParameter, TokenizerPath = tokenizerPath, IsEnterpriseConfiguration = isEnterpriseConfiguration },
                 LLMProviders.FIREWORKS => new ProviderFireworks { InstanceName = instanceName, ConfiguredProviderId = configuredProviderId, AdditionalJsonApiParameters = expertProviderApiParameter, TokenizerPath = tokenizerPath, IsEnterpriseConfiguration = isEnterpriseConfiguration },
@@ -357,6 +375,7 @@ public static class LLMProvidersExtensions
         LLMProviders.OPEN_ROUTER => "https://openrouter.ai/keys",
         LLMProviders.HETZNER => "https://experiments.hetzner.com",
         LLMProviders.IONOS => "https://cloud.ionos.com/compute/sign-up",
+        LLMProviders.REQUESTY => "https://app.requesty.ai/api-keys",
 
         LLMProviders.GROQ => "https://console.groq.com/",
         LLMProviders.FIREWORKS => "https://fireworks.ai/login",
@@ -384,6 +403,7 @@ public static class LLMProvidersExtensions
         LLMProviders.HUGGINGFACE => "https://huggingface.co/settings/billing",
         LLMProviders.HETZNER => "https://experiments.hetzner.com",
         LLMProviders.IONOS => "https://dcd.ionos.com/latest/?page=dcd-ai-model-hub",
+        LLMProviders.REQUESTY => "https://app.requesty.ai/",
 
         _ => string.Empty,
     };
@@ -404,6 +424,7 @@ public static class LLMProvidersExtensions
         LLMProviders.HUGGINGFACE => true,
         LLMProviders.HETZNER => true,
         LLMProviders.IONOS => true,
+        LLMProviders.REQUESTY => true,
 
         _ => false,
     };
@@ -492,6 +513,7 @@ public static class LLMProvidersExtensions
         LLMProviders.HETZNER => true,
         LLMProviders.IONOS => true,
         LLMProviders.LITE_LLM => true,
+        LLMProviders.REQUESTY => true,
 
         LLMProviders.GROQ => true,
         LLMProviders.FIREWORKS => true,
@@ -521,6 +543,7 @@ public static class LLMProvidersExtensions
         LLMProviders.OPEN_ROUTER => true,
         LLMProviders.HETZNER => true,
         LLMProviders.IONOS => true,
+        LLMProviders.REQUESTY => true,
 
         LLMProviders.GROQ => true,
         LLMProviders.FIREWORKS => true,

app/MindWork AI Studio/Provider/LLMProvidersIconExtensions.cs

@@ -31,6 +31,7 @@ public static class LLMProvidersIconExtensions
         LLMProviders.HETZNER => $"{ICON_ROOT}/hetzner.svg",
         LLMProviders.IONOS => $"{ICON_ROOT}/ionos.svg",
         LLMProviders.LITE_LLM => $"{ICON_ROOT}/litellm.svg",
+        LLMProviders.REQUESTY => $"{ICON_ROOT}/requesty.svg",
         LLMProviders.GROQ => $"{ICON_ROOT}/groq.svg",
         LLMProviders.FIREWORKS => $"{ICON_ROOT}/fireworks.svg",
         LLMProviders.HUGGINGFACE => $"{ICON_ROOT}/hugging-face.svg",

app/MindWork AI Studio/Provider/Mistral/ProviderMistral.cs

@@ -75,7 +75,7 @@ public sealed class ProviderMistral() : BaseProvider(LLMProviders.MISTRAL, new U
         return await this.PerformStandardTranscriptionRequest(requestedSecret, transcriptionModel, audioFilePath, token: token);
     }
 
-    /// <inhertidoc />
+    /// <inheritdoc />
     public override async Task<IReadOnlyList<IReadOnlyList<float>>> EmbedTextAsync(Provider.Model embeddingModel, SettingsManager settingsManager, CancellationToken token = default, params List<string> texts)
     {
         var requestedSecret = await Program.RUST_SERVICE.GetAPIKey(this, SecretStoreType.EMBEDDING_PROVIDER);

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

@@ -328,7 +328,7 @@ public sealed class ProviderOpenAI() : BaseProvider(LLMProviders.OPEN_AI, new Ur
         return await this.PerformStandardTranscriptionRequest(requestedSecret, transcriptionModel, audioFilePath, token: token);
     }
     
-    /// <inhertidoc />
+    /// <inheritdoc />
     public override async Task<IReadOnlyList<IReadOnlyList<float>>> EmbedTextAsync(Model embeddingModel, SettingsManager settingsManager, CancellationToken token = default, params List<string> texts)
     {
         var requestedSecret = await Program.RUST_SERVICE.GetAPIKey(this, SecretStoreType.EMBEDDING_PROVIDER);

app/MindWork AI Studio/Provider/OpenRouter/ProviderOpenRouter.cs

@@ -10,9 +10,6 @@ namespace AIStudio.Provider.OpenRouter;
 
 public sealed class ProviderOpenRouter() : BaseProvider(LLMProviders.OPEN_ROUTER, new Uri("https://openrouter.ai/api/v1/"), ExternalHttpTrustPolicy.SYSTEM_TRUST_ONLY, LOGGER)
 {
-    private const string PROJECT_WEBSITE = "https://github.com/MindWorkAI/AI-Studio";
-    private const string PROJECT_NAME = "MindWork AI Studio";
-
     private static readonly ILogger<ProviderOpenRouter> LOGGER = Program.LOGGER_FACTORY.CreateLogger<ProviderOpenRouter>();
 
     #region Implementation of IProvider
@@ -54,12 +51,7 @@ public sealed class ProviderOpenRouter() : BaseProvider(LLMProviders.OPEN_ROUTER
                                    AdditionalApiParameters = apiParameters
                                };
                            },
-                           headersAction: headers =>
-                           {
-                               // Set custom headers for project identification:
-                               headers.Add("HTTP-Referer", PROJECT_WEBSITE);
-                               headers.Add("X-Title", PROJECT_NAME);
-                           },
+                           headersAction: ProjectAttribution.Apply,
                            token: token))
             yield return content;
     }
@@ -78,7 +70,7 @@ public sealed class ProviderOpenRouter() : BaseProvider(LLMProviders.OPEN_ROUTER
         return Task.FromResult(TranscriptionResult.Failure());
     }
     
-    /// <inhertidoc />
+    /// <inheritdoc />
     public override async Task<IReadOnlyList<IReadOnlyList<float>>> EmbedTextAsync(Model embeddingModel, SettingsManager settingsManager, CancellationToken token = default, params List<string> texts)
     {
         var requestedSecret = await Program.RUST_SERVICE.GetAPIKey(this, SecretStoreType.EMBEDDING_PROVIDER);
@@ -120,12 +112,7 @@ public sealed class ProviderOpenRouter() : BaseProvider(LLMProviders.OPEN_ROUTER
                 .Select(n => new Model(n.Id, n.Name))
                 .Where(model => model.IsChatModel(this.Provider)),
             apiKeyProvisional,
-            requestConfigurator: (request, secretKey) =>
-            {
-                request.Headers.Authorization = new AuthenticationHeaderValue("Bearer", secretKey);
-                request.Headers.Add("HTTP-Referer", PROJECT_WEBSITE);
-                request.Headers.Add("X-Title", PROJECT_NAME);
-            },
+            requestConfigurator: ConfigureRequest,
             listingFactory: modelResponse => modelResponse.Data.Select(n => ModelListing.For(n.Id, n.ContextWindowTokens)),
             token: token);
     }
@@ -153,12 +140,13 @@ public sealed class ProviderOpenRouter() : BaseProvider(LLMProviders.OPEN_ROUTER
             "embeddings/models",
             modelResponse => modelResponse.Data.Select(n => new Model(n.Id, n.Name)),
             apiKeyProvisional,
-            requestConfigurator: (request, secretKey) =>
-            {
-                request.Headers.Authorization = new AuthenticationHeaderValue("Bearer", secretKey);
-                request.Headers.Add("HTTP-Referer", PROJECT_WEBSITE);
-                request.Headers.Add("X-Title", PROJECT_NAME);
-            },
+            requestConfigurator: ConfigureRequest,
             token: token);
     }
+
+    private static void ConfigureRequest(HttpRequestMessage request, string secretKey)
+    {
+        request.Headers.Authorization = new AuthenticationHeaderValue("Bearer", secretKey);
+        ProjectAttribution.Apply(request.Headers);
+    }
 }

app/MindWork AI Studio/Provider/Perplexity/ProviderPerplexity.cs

@@ -74,7 +74,7 @@ public sealed class ProviderPerplexity() : BaseProvider(LLMProviders.PERPLEXITY,
         return Task.FromResult(TranscriptionResult.Failure());
     }
     
-    /// <inhertidoc />
+    /// <inheritdoc />
     public override Task<IReadOnlyList<IReadOnlyList<float>>> EmbedTextAsync(Model embeddingModel, SettingsManager settingsManager, CancellationToken token = default, params List<string> texts)
     {
         throw this.CreateEmbeddingsNotSupportedException();

app/MindWork AI Studio/Provider/ProjectAttribution.cs

@@ -0,0 +1,39 @@
+using System.Net.Http.Headers;
+
+namespace AIStudio.Provider;
+
+/// <summary>
+/// The headers which tell a gateway that a request comes from AI Studio.
+/// </summary>
+/// <remarks>
+/// OpenRouter and Requesty read the same two headers: "HTTP-Referer" for the address of the app,
+/// and "X-Title" for its name. OpenRouter lists apps by them in its rankings (App Attribution), and
+/// Requesty tags the analytics of its users with them (Origin Headers), so a person can tell the
+/// requests of AI Studio apart from those of their other tools. OpenRouter calls the second header
+/// "X-OpenRouter-Title" by now and still reads "X-Title"; staying with the name both gateways
+/// understand is what lets them share this.
+///
+/// Neither header says anything about the user: both values are the same for every installation.
+/// </remarks>
+public static class ProjectAttribution
+{
+    /// <summary>
+    /// The address the gateways identify the app by.
+    /// </summary>
+    private const string PROJECT_WEBSITE = "https://github.com/MindWorkAI/AI-Studio";
+
+    /// <summary>
+    /// The name the gateways show for the app.
+    /// </summary>
+    private const string PROJECT_NAME = "MindWork AI Studio";
+
+    /// <summary>
+    /// Adds the attribution headers to a request.
+    /// </summary>
+    /// <param name="headers">The headers of the request.</param>
+    public static void Apply(HttpRequestHeaders headers)
+    {
+        headers.Add("HTTP-Referer", PROJECT_WEBSITE);
+        headers.Add("X-Title", PROJECT_NAME);
+    }
+}

app/MindWork AI Studio/Provider/Reasoning/ReasoningDispatcher.cs

@@ -108,6 +108,7 @@ public static class ReasoningDispatcher
             LLMProviders.HETZNER or
             LLMProviders.IONOS or
             LLMProviders.LITE_LLM or
+            LLMProviders.REQUESTY or
             LLMProviders.X or
             LLMProviders.DEEP_SEEK or
             LLMProviders.GROQ or

app/MindWork AI Studio/Provider/Requesty/ProviderRequesty.cs

@@ -0,0 +1,185 @@
+using System.Net.Http.Headers;
+using System.Runtime.CompilerServices;
+
+using AIStudio.Chat;
+using AIStudio.Models.Live;
+using AIStudio.Provider.OpenAI;
+using AIStudio.Settings;
+
+namespace AIStudio.Provider.Requesty;
+
+public sealed class ProviderRequesty() : BaseProvider(LLMProviders.REQUESTY, new Uri("https://router.requesty.ai/v1/"), ExternalHttpTrustPolicy.SYSTEM_TRUST_ONLY, LOGGER)
+{
+    private static readonly ILogger<ProviderRequesty> LOGGER = Program.LOGGER_FACTORY.CreateLogger<ProviderRequesty>();
+
+    #region Implementation of IProvider
+
+    /// <inheritdoc />
+    public override string Id => LLMProviders.REQUESTY.ToSecretId();
+
+    /// <inheritdoc />
+    public override string InstanceName { get; set; } = "Requesty";
+
+    /// <inheritdoc />
+    public override bool HasModelLoadingCapability => true;
+
+    /// <inheritdoc />
+    public override async IAsyncEnumerable<ContentStreamChunk> StreamChatCompletion(Model chatModel, ChatThread chatThread, SettingsManager settingsManager, [EnumeratorCancellation] CancellationToken token = default)
+    {
+        await foreach (var content in this.StreamOpenAICompatibleChatCompletion<ChatCompletionAPIRequest, ChatCompletionDeltaStreamLine, NoChatCompletionAnnotationStreamLine>(
+                           "Requesty",
+                           chatModel,
+                           chatThread,
+                           settingsManager,
+                           async (systemPrompt, apiParameters, tools) =>
+                           {
+                               // Build the list of messages:
+                               var messages = await chatThread.Blocks.BuildMessagesUsingNestedImageUrlAsync(this.CreateSettingsProvider(chatModel));
+
+                               return new ChatCompletionAPIRequest
+                               {
+                                   Model = chatModel.Id,
+
+                                   // Build the messages:
+                                   // - First of all the system prompt
+                                   // - Then none-empty user and AI messages
+                                   Messages = [systemPrompt, ..messages],
+
+                                   // Right now, we only support streaming completions:
+                                   Stream = true,
+                                   Tools = tools,
+                                   AdditionalApiParameters = apiParameters
+                               };
+                           },
+                           headersAction: ProjectAttribution.Apply,
+                           token: token))
+            yield return content;
+    }
+
+    #pragma warning disable CS1998 // Async method lacks 'await' operators and will run synchronously
+    /// <inheritdoc />
+    public override async IAsyncEnumerable<ImageURL> StreamImageCompletion(Model imageModel, string promptPositive, string promptNegative = FilterOperator.String.Empty, ImageURL referenceImageURL = default, [EnumeratorCancellation] CancellationToken token = default)
+    {
+        yield break;
+    }
+    #pragma warning restore CS1998 // Async method lacks 'await' operators and will run synchronously
+
+    /// <inheritdoc />
+    public override async Task<TranscriptionResult> TranscribeAudioAsync(Model transcriptionModel, string audioFilePath, SettingsManager settingsManager, CancellationToken token = default)
+    {
+        var requestedSecret = await Program.RUST_SERVICE.GetAPIKey(this, SecretStoreType.TRANSCRIPTION_PROVIDER);
+        return await this.PerformStandardTranscriptionRequest(requestedSecret, transcriptionModel, audioFilePath, token: token);
+    }
+
+    /// <inheritdoc />
+    public override async Task<IReadOnlyList<IReadOnlyList<float>>> EmbedTextAsync(Model embeddingModel, SettingsManager settingsManager, CancellationToken token = default, params List<string> texts)
+    {
+        var requestedSecret = await Program.RUST_SERVICE.GetAPIKey(this, SecretStoreType.EMBEDDING_PROVIDER);
+        return await this.PerformStandardTextEmbeddingRequest(requestedSecret, embeddingModel, token: token, texts: texts);
+    }
+
+    /// <inheritdoc />
+    public override Task<ModelLoadResult> GetTextModels(string? apiKeyProvisional = null, CancellationToken token = default)
+    {
+        return this.LoadModels(SecretStoreType.LLM_PROVIDER, apiKeyProvisional, token);
+    }
+
+    /// <inheritdoc />
+    public override Task<ModelLoadResult> GetImageModels(string? apiKeyProvisional = null, CancellationToken token = default)
+    {
+        return Task.FromResult(ModelLoadResult.FromModels([]));
+    }
+
+    /// <inheritdoc />
+    public override Task<ModelLoadResult> GetEmbeddingModels(string? apiKeyProvisional = null, CancellationToken token = default)
+    {
+        return this.LoadModelsOfRoute(SecretStoreType.EMBEDDING_PROVIDER, "models/embedding", apiKeyProvisional, token);
+    }
+
+    /// <inheritdoc />
+    public override Task<ModelLoadResult> GetTranscriptionModels(string? apiKeyProvisional = null, CancellationToken token = default)
+    {
+        return this.LoadModelsOfRoute(SecretStoreType.TRANSCRIPTION_PROVIDER, "models/transcription", apiKeyProvisional, token);
+    }
+
+    #endregion
+
+    /// <summary>
+    /// Loads the managed policies and the full model catalog, and offers both as one list.
+    /// </summary>
+    /// <remarks>
+    /// A managed policy, such as "claude-opus-5@eu", bundles several clouds which serve the same
+    /// model, and Requesty decides which of them answers a request. Requesty lists these policies on
+    /// a route of their own, and the catalog does not contain them. Both lists are read before
+    /// anything is reported, because what is reported replaces everything this instance said
+    /// before. When the managed route fails, the catalog alone is still offered.
+    /// </remarks>
+    /// <param name="storeType">Where the API key is stored.</param>
+    /// <param name="apiKeyProvisional">An API key which is not stored yet.</param>
+    /// <param name="token">The cancellation token to use.</param>
+    /// <returns>The chat models.</returns>
+    private async Task<ModelLoadResult> LoadModels(SecretStoreType storeType, string? apiKeyProvisional, CancellationToken token)
+    {
+        IList<RequestyModel> managedModels = [];
+        await this.LoadModelsResponse<RequestyModelsResponse>(
+            storeType,
+            "models/managed",
+            modelResponse =>
+            {
+                managedModels = modelResponse.Data;
+                return [];
+            },
+            apiKeyProvisional,
+            requestConfigurator: ConfigureRequest,
+            token: token);
+
+        return await this.LoadModelsResponse<RequestyModelsResponse>(
+            storeType,
+            "models",
+            modelResponse => managedModels.Concat(modelResponse.Data)
+                .DistinctBy(n => n.Id)
+                .Select(n => new Model(n.Id, null))
+                .Where(model => model.IsChatModel(this.Provider)),
+            apiKeyProvisional,
+            requestConfigurator: ConfigureRequest,
+            listingFactory: modelResponse => managedModels.Concat(modelResponse.Data)
+                .DistinctBy(n => n.Id)
+                .Select(n => ModelListing.For(n.Id, n.ContextWindowTokens)),
+            token: token);
+    }
+
+    /// <summary>
+    /// Loads the models Requesty offers for embedding or for transcription, each of which lives on
+    /// a route of its own.
+    /// </summary>
+    /// <remarks>
+    /// Nothing is reported from here: such a route answers with the models of its purpose alone,
+    /// and what is reported replaces everything an instance said before. The windows of the chat
+    /// models would go missing the moment somebody opens the embedding or transcription settings.
+    ///
+    /// Nothing is filtered either. The route is the statement: Requesty serves these models to
+    /// embed or to transcribe with, which is more than a name can say. Asking the registry on top
+    /// could only drop a model whose name we do not recognize.
+    /// </remarks>
+    /// <param name="storeType">Where the API key is stored.</param>
+    /// <param name="route">The route which lists the models, relative to the base URL.</param>
+    /// <param name="apiKeyProvisional">An API key which is not stored yet.</param>
+    /// <param name="token">The cancellation token to use.</param>
+    /// <returns>The models of the route.</returns>
+    private Task<ModelLoadResult> LoadModelsOfRoute(SecretStoreType storeType, string route, string? apiKeyProvisional, CancellationToken token)
+    {
+        return this.LoadModelsResponse<RequestyModelsResponse>(
+            storeType,
+            route,
+            modelResponse => modelResponse.Data.Select(n => new Model(n.Id, null)),
+            apiKeyProvisional,
+            requestConfigurator: ConfigureRequest,
+            token: token);
+    }
+
+    private static void ConfigureRequest(HttpRequestMessage request, string secretKey)
+    {
+        request.Headers.Authorization = new AuthenticationHeaderValue("Bearer", secretKey);
+        ProjectAttribution.Apply(request.Headers);
+    }
+}

app/MindWork AI Studio/Provider/Requesty/RequestyModel.cs

@@ -0,0 +1,10 @@
+using System.Text.Json.Serialization;
+
+namespace AIStudio.Provider.Requesty;
+
+/// <summary>
+/// A data model for a Requesty model from the API.
+/// </summary>
+/// <param name="Id">The model's ID.</param>
+/// <param name="ContextWindowTokens">How much the model reads and writes in one conversation, in tokens.</param>
+public readonly record struct RequestyModel(string Id, [property: JsonPropertyName("context_window")] int? ContextWindowTokens);

app/MindWork AI Studio/Provider/Requesty/RequestyModelsResponse.cs

@@ -0,0 +1,7 @@
+namespace AIStudio.Provider.Requesty;
+
+/// <summary>
+/// A data model for the response from the Requesty models endpoints.
+/// </summary>
+/// <param name="Data">The list of models.</param>
+public readonly record struct RequestyModelsResponse(IList<RequestyModel> Data);

app/MindWork AI Studio/Provider/SelfHosted/ProviderSelfHosted.cs

@@ -83,7 +83,7 @@ public sealed class ProviderSelfHosted(Host host, string hostname) : BaseProvide
         return await this.PerformStandardTranscriptionRequest(requestedSecret, transcriptionModel, audioFilePath, host, token);
     }
     
-    /// <inhertidoc />
+    /// <inheritdoc />
     public override async Task<IReadOnlyList<IReadOnlyList<float>>> EmbedTextAsync(Provider.Model embeddingModel, SettingsManager settingsManager, CancellationToken token = default, params List<string> texts)
     {
         var requestedSecret = await Program.RUST_SERVICE.GetAPIKey(this, SecretStoreType.EMBEDDING_PROVIDER, isTrying: true);

app/MindWork AI Studio/Provider/X/ProviderX.cs

@@ -67,7 +67,7 @@ public sealed class ProviderX() : BaseProvider(LLMProviders.X, new Uri("https://
         return Task.FromResult(TranscriptionResult.Failure());
     }
     
-    /// <inhertidoc />
+    /// <inheritdoc />
     public override Task<IReadOnlyList<IReadOnlyList<float>>> EmbedTextAsync(Model embeddingModel, SettingsManager settingsManager, CancellationToken token = default, params List<string> texts)
     {
         throw this.CreateEmbeddingsNotSupportedException();