Added an agent to select the appropriate data sources for any prompt (#284)

README.md

@@ -19,7 +19,7 @@ Things we are currently working on:
   - [ ] App: Implement the process to vectorize one local file using embeddings
   - [ ] Runtime: Integration of the vector database [LanceDB](https://github.com/lancedb/lancedb)
   - [ ] App: Implement the continuous process of vectorizing data
-  - [x] ~~App: Define a common retrieval context interface for the integration of RAG processes in chats (PR [#281](https://github.com/MindWorkAI/AI-Studio/pull/281))~~
+  - [x] ~~App: Define a common retrieval context interface for the integration of RAG processes in chats (PR [#281](https://github.com/MindWorkAI/AI-Studio/pull/281), [#284](https://github.com/MindWorkAI/AI-Studio/pull/284))~~
   - [ ] App: Define a common augmentation interface for the integration of RAG processes in chats
   - [x] ~~App: Integrate data sources in chats (PR [#282](https://github.com/MindWorkAI/AI-Studio/pull/282))~~
 

app/MindWork AI Studio.sln.DotSettings

@@ -5,6 +5,8 @@
 	<s:String x:Key="/Default/CodeStyle/Naming/CSharpNaming/Abbreviations/=LLM/@EntryIndexedValue">LLM</s:String>
 	<s:String x:Key="/Default/CodeStyle/Naming/CSharpNaming/Abbreviations/=LM/@EntryIndexedValue">LM</s:String>
 	<s:String x:Key="/Default/CodeStyle/Naming/CSharpNaming/Abbreviations/=MSG/@EntryIndexedValue">MSG</s:String>
+	<s:String x:Key="/Default/CodeStyle/Naming/CSharpNaming/Abbreviations/=RAG/@EntryIndexedValue">RAG</s:String>
+	<s:String x:Key="/Default/CodeStyle/Naming/CSharpNaming/Abbreviations/=UI/@EntryIndexedValue">UI</s:String>
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=groq/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=ollama/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=tauri_0027s/@EntryIndexedValue">True</s:Boolean></wpf:ResourceDictionary>

app/MindWork AI Studio/Agents/AgentBase.cs

@@ -1,3 +1,5 @@
+using System.Text.Json;
+
 using AIStudio.Chat;
 using AIStudio.Provider;
 using AIStudio.Settings;
@@ -9,6 +11,11 @@ namespace AIStudio.Agents;
 
 public abstract class AgentBase(ILogger<AgentBase> logger, SettingsManager settingsManager, DataSourceService dataSourceService, ThreadSafeRandom rng) : IAgent
 {
+    protected static readonly JsonSerializerOptions JSON_SERIALIZER_OPTIONS = new()
+    {
+        PropertyNamingPolicy = JsonNamingPolicy.SnakeCaseLower,
+    };
+    
     protected DataSourceService DataSourceService { get; init; } = dataSourceService;
     
     protected SettingsManager SettingsManager { get; init; } = settingsManager;

app/MindWork AI Studio/Agents/AgentDataSourceSelection.cs

@@ -0,0 +1,416 @@
+using System.Text;
+using System.Text.Json;
+
+using AIStudio.Chat;
+using AIStudio.Provider;
+using AIStudio.Settings;
+using AIStudio.Settings.DataModel;
+using AIStudio.Tools.ERIClient;
+using AIStudio.Tools.Services;
+
+namespace AIStudio.Agents;
+
+public sealed class AgentDataSourceSelection (ILogger<AgentDataSourceSelection> logger, ILogger<AgentBase> baseLogger, SettingsManager settingsManager, DataSourceService dataSourceService, ThreadSafeRandom rng) : AgentBase(baseLogger, settingsManager, dataSourceService, rng)
+{
+    private static readonly ContentBlock EMPTY_BLOCK = new()
+    {
+        Content = null,
+        ContentType = ContentType.NONE,
+        Role = ChatRole.AGENT,
+        Time = DateTimeOffset.UtcNow,
+    };
+    
+    private readonly List<ContentBlock> answers = new();
+    
+    #region Overrides of AgentBase
+
+    /// <inheritdoc />
+    protected override Type Type => Type.SYSTEM;
+    
+    /// <inheritdoc />
+    public override string Id => "Data Source Selection";
+
+    /// <inheritdoc />
+    protected override string JobDescription =>
+        """
+        You receive a system and a user prompt, as well as a list of possible data sources as input.
+        Your task is to select the appropriate data sources for the given task. You may choose none,
+        one, or multiple sources, depending on what best fits the system and user prompt. You need
+        to estimate and assess which source, based on its description, might be helpful in
+        processing the prompts.
+        
+        Your response is a JSON list in the following format:
+        
+        ```
+        [
+          {"id": "The data source ID", "reason": "Why did you choose this source?", "confidence": 0.87},
+          {"id": "The data source ID", "reason": "Why did you choose this source?", "confidence": 0.54}
+        ]
+        ```
+        
+        You express your confidence as a floating-point number between 0.0 (maximum uncertainty) and
+        1.0 (you are absolutely certain that this source is needed).
+        
+        The JSON schema is:
+        
+        ```
+        {
+          "$schema": "http://json-schema.org/draft-04/schema#",
+          "type": "array", 
+          "items": [
+            {
+              "type": "object",
+              "properties": {
+                "id": {
+                  "type": "string"
+                },
+                "reason": {
+                  "type": "string"
+                },
+                "confidence": {
+                  "type": "number"
+                }
+              },
+              "required": [
+                "id",
+                "reason",
+                "confidence"
+              ]
+            }
+          ]
+        }
+        ```
+        
+        When no data source is needed, you return an empty JSON list `[]`. You do not ask any
+        follow-up questions. You do not address the user. Your response consists solely of
+        the JSON list.
+        """;
+    
+    /// <inheritdoc />
+    protected override string SystemPrompt(string availableDataSources) => $"""
+                                                                      {this.JobDescription}
+                                                                      
+                                                                      {availableDataSources}
+                                                                      """;
+
+    /// <inheritdoc />
+    public override Settings.Provider? ProviderSettings { get; set; }
+    
+    /// <summary>
+    /// The data source selection agent does not work with context. Use
+    /// the process input method instead.
+    /// </summary>
+    /// <returns>The chat thread without any changes.</returns>
+    public override Task<ChatThread> ProcessContext(ChatThread chatThread, IDictionary<string, string> additionalData) => Task.FromResult(chatThread);
+
+    /// <inheritdoc />
+    public override async Task<ContentBlock> ProcessInput(ContentBlock input, IDictionary<string, string> additionalData)
+    {
+        if (input.Content is not ContentText text)
+            return EMPTY_BLOCK;
+        
+        if(text.InitialRemoteWait || text.IsStreaming)
+            return EMPTY_BLOCK;
+        
+        if(string.IsNullOrWhiteSpace(text.Text))
+            return EMPTY_BLOCK;
+        
+        if(!additionalData.TryGetValue("availableDataSources", out var availableDataSources) || string.IsNullOrWhiteSpace(availableDataSources))
+            return EMPTY_BLOCK;
+        
+        var thread = this.CreateChatThread(this.SystemPrompt(availableDataSources));
+        var time = this.AddUserRequest(thread, text.Text);
+        await this.AddAIResponseAsync(thread, time);
+        
+        var answer = thread.Blocks[^1];
+        
+        this.answers.Add(answer);
+        return answer;
+    }
+
+    // <inheritdoc />
+    public override Task<bool> MadeDecision(ContentBlock input) => Task.FromResult(true);
+
+    // <inheritdoc />
+    public override IReadOnlyCollection<ContentBlock> GetContext() => [];
+
+    // <inheritdoc />
+    public override IReadOnlyCollection<ContentBlock> GetAnswers() => this.answers;
+
+    #endregion
+
+    public async Task<List<SelectedDataSource>> PerformSelectionAsync(IProvider provider, IContent lastPrompt, ChatThread chatThread, AllowedSelectedDataSources dataSources, CancellationToken token = default)
+    {
+        logger.LogInformation("The AI should select the appropriate data sources.");
+
+        //
+        // 1. Which LLM provider should the agent use?
+        //
+
+        // We start with the provider currently selected by the user:
+        var agentProvider = this.SettingsManager.ConfigurationData.Providers.FirstOrDefault(x => x.Id == provider.Id);
+
+        // If the user preselected an agent provider, we try to use this one:
+        if (this.SettingsManager.ConfigurationData.AgentDataSourceSelection.PreselectAgentOptions)
+        {
+            var configuredAgentProvider = this.SettingsManager.ConfigurationData.Providers.FirstOrDefault(x => x.Id == this.SettingsManager.ConfigurationData.AgentDataSourceSelection.PreselectedAgentProvider);
+
+            // If the configured agent provider is available, we use it:
+            if (configuredAgentProvider != default)
+                agentProvider = configuredAgentProvider;
+        }
+
+        // Assign the provider settings to the agent:
+        logger.LogInformation($"The agent for the data source selection uses the provider '{agentProvider.InstanceName}' ({agentProvider.UsedLLMProvider.ToName()}, confidence={agentProvider.UsedLLMProvider.GetConfidence(this.SettingsManager).Level.GetName()}).");
+        this.ProviderSettings = agentProvider;
+
+        //
+        // 2. Prepare the current system and user prompts as input for the agent: 
+        //
+        var lastPromptContent = lastPrompt switch
+        {
+            ContentText text => text.Text,
+
+            // Image prompts may be empty, e.g., when the image is too large:
+            ContentImage image => await image.AsBase64(token),
+
+            // Other content types are not supported yet:
+            _ => string.Empty,
+        };
+
+        if (string.IsNullOrWhiteSpace(lastPromptContent))
+        {
+            logger.LogWarning("The last prompt is empty. The AI cannot select data sources.");
+            return [];
+        }
+
+        //
+        // 3. Prepare the allowed data sources as input for the agent:
+        //
+        var additionalData = new Dictionary<string, string>();
+        logger.LogInformation("Preparing the list of allowed data sources for the agent to choose from.");
+        
+        // Notice: We do not dispose the Rust service here. The Rust service is a singleton
+        // and will be disposed when the application shuts down:
+        var rustService = Program.SERVICE_PROVIDER.GetService<RustService>()!;
+        
+        var sb = new StringBuilder();
+        sb.AppendLine("The following data sources are available for selection:");
+        foreach (var ds in dataSources.AllowedDataSources)
+        {
+            switch (ds)
+            {
+                case DataSourceLocalDirectory localDirectory:
+                    sb.AppendLine($"- Id={ds.Id}, name='{localDirectory.Name}', type=local directory, path='{localDirectory.Path}'");
+                    break;
+
+                case DataSourceLocalFile localFile:
+                    sb.AppendLine($"- Id={ds.Id}, name='{localFile.Name}', type=local file, path='{localFile.FilePath}'");
+                    break;
+
+                case IERIDataSource eriDataSource:
+                    var eriServerDescription = string.Empty;
+
+                    try
+                    {
+                        //
+                        // Call the ERI server to get the server description:
+                        //
+                        using var eriClient = ERIClientFactory.Get(eriDataSource.Version, eriDataSource)!;
+                        var authResponse = await eriClient.AuthenticateAsync(eriDataSource, rustService, token);
+                        if (authResponse.Successful)
+                        {
+                            var serverDescriptionResponse = await eriClient.GetDataSourceInfoAsync(token);
+                            if (serverDescriptionResponse.Successful)
+                            {
+                                eriServerDescription = serverDescriptionResponse.Data.Description;
+
+                                // Remove all line breaks from the description:
+                                eriServerDescription = eriServerDescription.Replace("\n", " ").Replace("\r", " ");
+                            }
+                            else
+                                logger.LogWarning($"Was not able to retrieve the server description from the ERI data source '{eriDataSource.Name}'. Message: {serverDescriptionResponse.Message}");
+                        }
+                        else
+                            logger.LogWarning($"Was not able to authenticate with the ERI data source '{eriDataSource.Name}'. Message: {authResponse.Message}");
+                    }
+                    catch (Exception e)
+                    {
+                        logger.LogWarning($"The ERI data source '{eriDataSource.Name}' is not available. Thus, we cannot retrieve the server description. Error: {e.Message}");
+                    }
+
+                    //
+                    // Append the ERI data source to the list. Use the server description if available:
+                    //
+                    if (string.IsNullOrWhiteSpace(eriServerDescription))
+                        sb.AppendLine($"- Id={ds.Id}, name='{eriDataSource.Name}', type=external data source");
+                    else
+                        sb.AppendLine($"- Id={ds.Id}, name='{eriDataSource.Name}', type=external data source, description='{eriServerDescription}'");
+
+                    break;
+            }
+        }
+
+        logger.LogInformation("Prepared the list of allowed data sources for the agent.");
+        additionalData.Add("availableDataSources", sb.ToString());
+
+        //
+        // 4. Let the agent select the data sources:
+        //
+        var prompt = $"""
+                      The system prompt is:
+
+                      ```
+                      {chatThread.SystemPrompt}
+                      ```
+
+                      The user prompt is:
+
+                      ```
+                      {lastPromptContent}
+                      ```
+                      """;
+
+        // Call the agent:
+        var aiResponse = await this.ProcessInput(new ContentBlock
+        {
+            Time = DateTimeOffset.UtcNow,
+            ContentType = ContentType.TEXT,
+            Role = ChatRole.USER,
+            Content = new ContentText
+            {
+                Text = prompt,
+            },
+        }, additionalData);
+
+        if(aiResponse.Content is null)
+        {
+            logger.LogWarning("The agent did not return a response.");
+            return [];
+        }
+
+        switch (aiResponse)
+        {
+            
+            //
+            // 5. Parse the agent response:
+            //
+            case { ContentType: ContentType.TEXT, Content: ContentText textContent }:
+            {
+                //
+                // What we expect is a JSON list of SelectedDataSource objects:
+                //
+                var selectedDataSourcesJson = textContent.Text;
+                
+                //
+                // We know how bad LLM may be in generating JSON without surrounding text.
+                // Thus, we expect the worst and try to extract the JSON list from the text:
+                //
+                var json = this.ExtractJson(selectedDataSourcesJson);
+                
+                try
+                {
+                    var aiSelectedDataSources = JsonSerializer.Deserialize<List<SelectedDataSource>>(json, JSON_SERIALIZER_OPTIONS);
+                    return aiSelectedDataSources ?? [];
+                }
+                catch
+                {
+                    logger.LogWarning("The agent answered with an invalid or unexpected JSON format.");
+                    return [];
+                }
+            }
+            
+            case { ContentType: ContentType.TEXT }:
+                logger.LogWarning("The agent answered with an unexpected inner content type.");
+                return [];
+            
+            case { ContentType: ContentType.NONE }:
+                logger.LogWarning("The agent did not return a response.");
+                return [];
+            
+            default:
+                logger.LogWarning($"The agent answered with an unexpected content type '{aiResponse.ContentType}'.");
+                return [];
+        }
+    }
+    
+    /// <summary>
+    /// Extracts the JSON list from the given text. The text may contain additional
+    /// information around the JSON list. The method tries to extract the JSON list
+    /// from the text.
+    /// </summary>
+    /// <remarks>
+    /// Algorithm: The method searches for the first line that contains only a '[' character.
+    /// Then, it searches for the first line that contains only a ']' character. The method
+    /// returns the text between these two lines (including the brackets). When the method
+    /// cannot find the JSON list, it returns an empty string.
+    /// <br/><br/>
+    /// This overload is using strings instead of spans. We can use this overload in any
+    /// async method. Thus, it is a wrapper around the span-based method. Yes, we are losing
+    /// the memory efficiency of the span-based method, but we still gain the performance
+    /// of the span-based method: the entire search algorithm is span-based.
+    /// </remarks>
+    /// <param name="text">The text that may contain the JSON list.</param>
+    /// <returns>The extracted JSON list.</returns>
+    private string ExtractJson(string text) => ExtractJson(text.AsSpan()).ToString();
+
+    /// <summary>
+    /// Extracts the JSON list from the given text. The text may contain additional
+    /// information around the JSON list. The method tries to extract the JSON list
+    /// from the text.
+    /// </summary>
+    /// <remarks>
+    /// Algorithm: The method searches for the first line that contains only a '[' character.
+    /// Then, it searches for the first line that contains only a ']' character. The method
+    /// returns the text between these two lines (including the brackets). When the method
+    /// cannot find the JSON list, it returns an empty string.
+    /// </remarks>
+    /// <param name="text">The text that may contain the JSON list.</param>
+    /// <returns>The extracted JSON list.</returns>
+    private static ReadOnlySpan<char> ExtractJson(ReadOnlySpan<char> text)
+    {
+        var startIndex = -1;
+        var endIndex = -1;
+        var foundStart = false;
+        var foundEnd = false;
+        var lineStart = 0;
+        
+        for (var i = 0; i <= text.Length; i++)
+        {
+            // Handle the end of the line or the end of the text:
+            if (i == text.Length || text[i] == '\n')
+            {
+                if (IsCharacterAloneInLine(text, lineStart, i, '[') && !foundStart)
+                {
+                    startIndex = lineStart;
+                    foundStart = true;
+                }
+                else if (IsCharacterAloneInLine(text, lineStart, i, ']') && foundStart && !foundEnd)
+                {
+                    endIndex = i;
+                    foundEnd = true;
+                    break;
+                }
+                
+                lineStart = i + 1;
+            }
+        }
+        
+        if (foundStart && foundEnd)
+        {
+            // Adjust endIndex for slicing, ensuring it's within bounds:
+            return text.Slice(startIndex, Math.Min(text.Length, endIndex + 1) - startIndex);
+        }
+        
+        return ReadOnlySpan<char>.Empty;
+    }
+    
+    private static bool IsCharacterAloneInLine(ReadOnlySpan<char> text, int lineStart, int lineEnd, char character)
+    {
+        for (var i = lineStart; i < lineEnd; i++)
+            if (!char.IsWhiteSpace(text[i]) && text[i] != character)
+                return false;
+
+        return true;
+    }
+}

app/MindWork AI Studio/Agents/SelectedDataSource.cs

@@ -0,0 +1,9 @@
+namespace AIStudio.Agents;
+
+/// <summary>
+/// Represents a selected data source, chosen by the agent.
+/// </summary>
+/// <param name="Id">The data source ID.</param>
+/// <param name="Reason">The reason for selecting the data source.</param>
+/// <param name="Confidence">The confidence of the agent in the selection.</param>
+public readonly record struct SelectedDataSource(string Id, string Reason, float Confidence);

app/MindWork AI Studio/Chat/ChatThread.cs

@@ -1,3 +1,4 @@
+using AIStudio.Components;
 using AIStudio.Settings;
 using AIStudio.Settings.DataModel;
 
@@ -33,6 +34,11 @@ public sealed record ChatThread
     /// </summary>
     public DataSourceOptions DataSourceOptions { get; set; } = new();
 
+    /// <summary>
+    /// The AI-selected data sources for this chat thread.
+    /// </summary>
+    public IReadOnlyList<DataSourceAgentSelected> AISelectedDataSources { get; set; } = [];
+
     /// <summary>
     /// The name of the chat thread. Usually generated by an AI model or manually edited by the user.
     /// </summary>

app/MindWork AI Studio/Chat/ContentImage.cs

@@ -49,4 +49,62 @@ public sealed class ContentImage : IContent
     /// The image source.
     /// </summary>
     public required string Source { get; set; }
+
+    /// <summary>
+    /// Read the image content as a base64 string.
+    /// </summary>
+    /// <remarks>
+    /// The images are directly converted to base64 strings. The maximum
+    /// size of the image is around 10 MB. If the image is larger, the method
+    /// returns an empty string.
+    ///
+    /// As of now, this method does no sort of image processing. LLMs usually
+    /// do not work with arbitrary image sizes. In the future, we might have
+    /// to resize the images before sending them to the model.
+    /// </remarks>
+    /// <param name="token">The cancellation token.</param>
+    /// <returns>The image content as a base64 string; might be empty.</returns>
+    public async Task<string> AsBase64(CancellationToken token = default)
+    {
+        switch (this.SourceType)
+        {
+            case ContentImageSource.BASE64:
+                return this.Source;
+            
+            case ContentImageSource.URL:
+            {
+                using var httpClient = new HttpClient();
+                using var response = await httpClient.GetAsync(this.Source, HttpCompletionOption.ResponseHeadersRead, token);
+                if(response.IsSuccessStatusCode)
+                {
+                    // Read the length of the content:
+                    var lengthBytes = response.Content.Headers.ContentLength;
+                    if(lengthBytes > 10_000_000)
+                        return string.Empty;
+                    
+                    var bytes = await response.Content.ReadAsByteArrayAsync(token);
+                    return Convert.ToBase64String(bytes);
+                }
+
+                return string.Empty;
+            }
+
+            case ContentImageSource.LOCAL_PATH:
+                if(File.Exists(this.Source))
+                {
+                    // Read the content length:
+                    var length = new FileInfo(this.Source).Length;
+                    if(length > 10_000_000)
+                        return string.Empty;
+                    
+                    var bytes = await File.ReadAllBytesAsync(this.Source, token);
+                    return Convert.ToBase64String(bytes);
+                }
+
+                return string.Empty;
+            
+            default:
+                return string.Empty;
+        }
+    }
 }

app/MindWork AI Studio/Chat/ContentText.cs

@@ -1,5 +1,7 @@
 using System.Text.Json.Serialization;
 
+using AIStudio.Agents;
+using AIStudio.Components;
 using AIStudio.Provider;
 using AIStudio.Settings;
 using AIStudio.Tools.Services;
@@ -41,11 +43,19 @@ public sealed class ContentText : IContent
         if(chatThread is null)
             return;
 
+        var logger = Program.SERVICE_PROVIDER.GetService<ILogger<ContentText>>()!;
+        
         //
-        // Check if the user wants to bind any data sources to the chat:
+        // 1. Check if the user wants to bind any data sources to the chat:
         //
-        if (chatThread.DataSourceOptions.IsEnabled())
+        if (chatThread.DataSourceOptions.IsEnabled() && lastPrompt is not null)
         {
+            logger.LogInformation("Data sources are enabled for this chat.");
+            
+            // Across the different code-branches, we keep track of whether it
+            // makes sense to proceed with the RAG process:
+            var proceedWithRAG = true;
+            
             //
             // When the user wants to bind data sources to the chat, we
             // have to check if the data sources are available for the
@@ -61,16 +71,144 @@ public sealed class ContentText : IContent
             //
             if (chatThread.DataSourceOptions.AutomaticDataSourceSelection)
             {
-                // TODO: Start agent based on allowed data sources.
+                // Get the agent for the data source selection:
+                var selectionAgent = Program.SERVICE_PROVIDER.GetService<AgentDataSourceSelection>()!;
+                
+                // Let the AI agent do its work:
+                IReadOnlyList<DataSourceAgentSelected> finalAISelection = [];
+                var aiSelectedDataSources = await selectionAgent.PerformSelectionAsync(provider, lastPrompt, chatThread, dataSources, token);
+
+                // Check if the AI selected any data sources:
+                if(aiSelectedDataSources.Count is 0)
+                {
+                    logger.LogWarning("The AI did not select any data sources. The RAG process is skipped.");
+                    proceedWithRAG = false;
+                    
+                    // Send the selected data sources to the data source selection component.
+                    // Then, the user can see which data sources were selected by the AI.
+                    await MessageBus.INSTANCE.SendMessage(null, Event.RAG_AUTO_DATA_SOURCES_SELECTED, finalAISelection);
+                    chatThread.AISelectedDataSources = finalAISelection;
+                }
+                else
+                {
+                    // Log the selected data sources:
+                    var selectedDataSourceInfo = aiSelectedDataSources.Select(ds => $"[Id={ds.Id}, reason={ds.Reason}, confidence={ds.Confidence}]").Aggregate((a, b) => $"'{a}', '{b}'");
+                    logger.LogInformation($"The AI selected the data sources automatically. {aiSelectedDataSources.Count} data source(s) are selected: {selectedDataSourceInfo}.");
+
+                    //
+                    // Check how many data sources were hallucinated by the AI:
+                    //
+                    var totalAISelectedDataSources = aiSelectedDataSources.Count;
+                    
+                    // Filter out the data sources that are not available:
+                    aiSelectedDataSources = aiSelectedDataSources.Where(x => settings.ConfigurationData.DataSources.FirstOrDefault(ds => ds.Id == x.Id) is not null).ToList();
+                    
+                    // Store the real AI-selected data sources:
+                    finalAISelection = aiSelectedDataSources.Select(x => new DataSourceAgentSelected { DataSource = settings.ConfigurationData.DataSources.First(ds => ds.Id == x.Id), AIDecision = x, Selected = false }).ToList();
+                    
+                    var numHallucinatedSources = totalAISelectedDataSources - aiSelectedDataSources.Count;
+                    if(numHallucinatedSources > 0)
+                        logger.LogWarning($"The AI hallucinated {numHallucinatedSources} data source(s). We ignore them.");
+                    
+                    if (aiSelectedDataSources.Count > 3)
+                    {
+                        //
+                        // We have more than 3 data sources. Let's filter by confidence.
+                        // In order to do that, we must identify the lower and upper
+                        // bounds of the confidence interval:
+                        //
+                        var confidenceValues = aiSelectedDataSources.Select(x => x.Confidence).ToList();
+                        var lowerBound = confidenceValues.Min();
+                        var upperBound = confidenceValues.Max();
+                        
+                        //
+                        // Next, we search for a threshold so that we have between 2 and 3
+                        // data sources. When not possible, we take all data sources.
+                        //
+                        var threshold = 0.0f;
+                        
+                        // Check the case where the confidence values are too close:
+                        if (upperBound - lowerBound >= 0.01)
+                        {
+                            var previousThreshold = 0.0f;
+                            for (var i = 0; i < 10; i++)
+                            {
+                                threshold = lowerBound + (upperBound - lowerBound) * i / 10;
+                                var numMatches = aiSelectedDataSources.Count(x => x.Confidence >= threshold);
+                                if (numMatches <= 1)
+                                {
+                                    threshold = previousThreshold;
+                                    break;
+                                }
+		
+                                if (numMatches is <= 3 and >= 2)
+                                    break;
+                                
+                                previousThreshold = threshold;
+                            }
+                        }
+                        
+                        //
+                        // Filter the data sources by the threshold:
+                        //
+                        aiSelectedDataSources = aiSelectedDataSources.Where(x => x.Confidence >= threshold).ToList();
+                        foreach (var dataSource in finalAISelection)
+                            if(aiSelectedDataSources.Any(x => x.Id == dataSource.DataSource.Id))
+                                dataSource.Selected = true;
+                        
+                        logger.LogInformation($"The AI selected {aiSelectedDataSources.Count} data source(s) with a confidence of at least {threshold}.");
+                        
+                        // Transform the final data sources to the actual data sources:
+                        selectedDataSources = aiSelectedDataSources.Select(x => settings.ConfigurationData.DataSources.FirstOrDefault(ds => ds.Id == x.Id)).Where(ds => ds is not null).ToList()!;
+                    }
+                    
+                    // We have max. 3 data sources. We take all of them:
+                    else
+                    {
+                        // Transform the selected data sources to the actual data sources:
+                        selectedDataSources = aiSelectedDataSources.Select(x => settings.ConfigurationData.DataSources.FirstOrDefault(ds => ds.Id == x.Id)).Where(ds => ds is not null).ToList()!;
+                        
+                        // Mark the data sources as selected:
+                        foreach (var dataSource in finalAISelection)
+                            dataSource.Selected = true;
+                    }
+                    
+                    // Send the selected data sources to the data source selection component.
+                    // Then, the user can see which data sources were selected by the AI.
+                    await MessageBus.INSTANCE.SendMessage(null, Event.RAG_AUTO_DATA_SOURCES_SELECTED, finalAISelection);
+                    chatThread.AISelectedDataSources = finalAISelection;
+                }
+            }
+            else
+            {
+                //
+                // No, the user made the choice manually:
+                //
+                var selectedDataSourceInfo = selectedDataSources.Select(ds => ds.Name).Aggregate((a, b) => $"'{a}', '{b}'");
+                logger.LogInformation($"The user selected the data sources manually. {selectedDataSources.Count} data source(s) are selected: {selectedDataSourceInfo}.");
+            }
+
+            if(selectedDataSources.Count == 0)
+            {
+                logger.LogWarning("No data sources are selected. The RAG process is skipped.");
+                proceedWithRAG = false;
             }
             
             //
             // Trigger the retrieval part of the (R)AG process:
             //
+            if (proceedWithRAG)
+            {
+                
+            }
 
             //
             // Perform the augmentation of the R(A)G process:
             //
+            if (proceedWithRAG)
+            {
+                
+            }
         }
         
         // Store the last time we got a response. We use this later

app/MindWork AI Studio/Components/ChatComponent.razor

@@ -111,7 +111,7 @@
             
             @if (PreviewFeatures.PRE_RAG_2024.IsEnabled(this.SettingsManager))
             {
-                <DataSourceSelection @ref="@this.dataSourceSelectionComponent" PopoverTriggerMode="PopoverTriggerMode.BUTTON" PopoverButtonClasses="ma-3" LLMProvider="@this.Provider" DataSourceOptions="@this.GetCurrentDataSourceOptions()" DataSourceOptionsChanged="@(async options => await this.SetCurrentDataSourceOptions(options))"/>
+                <DataSourceSelection @ref="@this.dataSourceSelectionComponent" PopoverTriggerMode="PopoverTriggerMode.BUTTON" PopoverButtonClasses="ma-3" LLMProvider="@this.Provider" DataSourceOptions="@this.GetCurrentDataSourceOptions()" DataSourceOptionsChanged="@(async options => await this.SetCurrentDataSourceOptions(options))" DataSourcesAISelected="@this.GetAgentSelectedDataSources()"/>
             }
         </MudToolBar>
     </FooterContent>

app/MindWork AI Studio/Components/ChatComponent.razor.cs

@@ -305,6 +305,14 @@ public partial class ChatComponent : MSGComponentBase, IAsyncDisposable
         await this.ChatThreadChanged.InvokeAsync(this.ChatThread);
     }
 
+    private IReadOnlyList<DataSourceAgentSelected> GetAgentSelectedDataSources()
+    {
+        if (this.ChatThread is null)
+            return [];
+
+        return this.ChatThread.AISelectedDataSources;
+    }
+
     private DataSourceOptions GetCurrentDataSourceOptions()
     {
         if (this.ChatThread is not null)
@@ -481,6 +489,8 @@ public partial class ChatComponent : MSGComponentBase, IAsyncDisposable
 
         // Disable the stream state:
         this.isStreaming = false;
+        
+        // Update the UI:
         this.StateHasChanged();
     }
     
@@ -674,7 +684,7 @@ public partial class ChatComponent : MSGComponentBase, IAsyncDisposable
             this.currentWorkspaceId = this.ChatThread.WorkspaceId;
             this.currentWorkspaceName = await WorkspaceBehaviour.LoadWorkspaceName(this.ChatThread.WorkspaceId);
             this.WorkspaceName(this.currentWorkspaceName);
-            this.dataSourceSelectionComponent?.ChangeOptionWithoutSaving(this.ChatThread.DataSourceOptions);
+            this.dataSourceSelectionComponent?.ChangeOptionWithoutSaving(this.ChatThread.DataSourceOptions, this.ChatThread.AISelectedDataSources);
         }
         else
         {

app/MindWork AI Studio/Components/DataSourceAgentSelected.cs

@@ -0,0 +1,25 @@
+using AIStudio.Agents;
+using AIStudio.Settings;
+
+namespace AIStudio.Components;
+
+/// <summary>
+/// A data structure to combine the data source and the underlying AI decision.
+/// </summary>
+public sealed class DataSourceAgentSelected
+{
+    /// <summary>
+    /// The data source.
+    /// </summary>
+    public required IDataSource DataSource { get; set; }
+
+    /// <summary>
+    /// The AI decision, which led to the selection of the data source.
+    /// </summary>
+    public required SelectedDataSource AIDecision { get; set; }
+
+    /// <summary>
+    /// Indicates whether the data source is part of the final selection for the RAG process.
+    /// </summary>
+    public bool Selected { get; set; }
+}

app/MindWork AI Studio/Components/DataSourceSelection.razor

@@ -24,7 +24,7 @@
                         <MudText Typo="Typo.h5">Data Source Selection</MudText>
                     </CardHeaderContent>
                 </MudCardHeader>
-                <MudCardContent Style="max-height: 60vh; overflow: auto;">
+                <MudCardContent Style="min-width: 24em; max-height: 60vh; max-width: 45vw; overflow: auto;">
                     @if (this.waitingForDataSources)
                     {
                         <MudSkeleton Width="30%" Height="42px;"/>
@@ -38,8 +38,11 @@
                         {
                             <MudTextSwitch Label="AI-based data source selection" Value="@this.aiBasedSourceSelection" LabelOn="Yes, let the AI decide which data sources are needed." LabelOff="No, I manually decide which data source to use." ValueChanged="@this.AutoModeChanged"/>
                             <MudTextSwitch Label="AI-based data validation" Value="@this.aiBasedValidation" LabelOn="Yes, let the AI validate & filter the retrieved data." LabelOff="No, use all data retrieved from the data sources." ValueChanged="@this.ValidationModeChanged"/>
+                            
+                            @if (this.aiBasedSourceSelection is false || this.DataSourcesAISelected.Count == 0)
+                            {
                                 <MudField Label="Available Data Sources" Variant="Variant.Outlined" Class="mb-3" Disabled="@this.aiBasedSourceSelection">
-                                <MudList T="IDataSource" SelectionMode="MudBlazor.SelectionMode.MultiSelection" @bind-SelectedValues:get="@this.selectedDataSources" @bind-SelectedValues:set="@(x => this.SelectionChanged(x))" Style="max-height: 14em;">
+                                    <MudList T="IDataSource" SelectionMode="@this.GetListSelectionMode()" @bind-SelectedValues:get="@this.selectedDataSources" @bind-SelectedValues:set="@(x => this.SelectionChanged(x))" Style="max-height: 14em;">
                                         @foreach (var source in this.availableDataSources)
                                         {
                                             <MudListItem Value="@source">
@@ -49,6 +52,41 @@
                                     </MudList>
                                 </MudField>
                             }
+                            else
+                            {
+                                <MudExpansionPanels MultiExpansion="@false" Class="mt-3" Style="max-height: 14em;">
+                                    <ExpansionPanel HeaderIcon="@Icons.Material.Filled.TouchApp" HeaderText="Available Data Sources">
+                                        <MudList T="IDataSource" SelectionMode="MudBlazor.SelectionMode.SingleSelection" SelectedValues="@this.selectedDataSources" Style="max-height: 14em;">
+                                            @foreach (var source in this.availableDataSources)
+                                            {
+                                                <MudListItem Value="@source">
+                                                    @source.Name
+                                                </MudListItem>
+                                            }
+                                        </MudList>
+                                    </ExpansionPanel>
+                                    <ExpansionPanel HeaderIcon="@Icons.Material.Filled.Filter" HeaderText="AI-Selected Data Sources">
+                                        <MudList T="DataSourceAgentSelected" SelectionMode="MudBlazor.SelectionMode.MultiSelection" ReadOnly="@true" SelectedValues="@this.GetSelectedDataSourcesWithAI()" Style="max-height: 14em;">
+                                            @foreach (var source in this.DataSourcesAISelected)
+                                            {
+                                                <MudListItem Value="@source">
+                                                    <ChildContent>
+                                                        <MudText Typo="Typo.body1">
+                                                            @source.DataSource.Name
+                                                        </MudText>
+                                                        
+                                                        <MudProgressLinear Color="Color.Info" Min="0" Max="1" Value="@source.AIDecision.Confidence"/>
+                                                        <MudJustifiedText Typo="Typo.body2">
+                                                            @this.GetAIReasoning(source)
+                                                        </MudJustifiedText>
+                                                    </ChildContent>
+                                                </MudListItem>
+                                            }
+                                        </MudList>
+                                    </ExpansionPanel>
+                                </MudExpansionPanels>
+                            }
+                        }
                     }
                 </MudCardContent>
                 <MudCardActions>
@@ -79,7 +117,7 @@ else if (this.SelectionMode is DataSourceSelectionMode.CONFIGURATION_MODE)
             <MudTextSwitch Label="AI-based data source selection" Value="@this.aiBasedSourceSelection" LabelOn="Yes, let the AI decide which data sources are needed." LabelOff="No, I manually decide which data source to use." ValueChanged="@this.AutoModeChanged"/>
             <MudTextSwitch Label="AI-based data validation" Value="@this.aiBasedValidation" LabelOn="Yes, let the AI validate & filter the retrieved data." LabelOff="No, use all data retrieved from the data sources." ValueChanged="@this.ValidationModeChanged"/>
             <MudField Label="Available Data Sources" Variant="Variant.Outlined" Class="mb-3" Disabled="@this.aiBasedSourceSelection">
-                <MudList T="IDataSource" SelectionMode="MudBlazor.SelectionMode.MultiSelection" @bind-SelectedValues:get="@this.selectedDataSources" @bind-SelectedValues:set="@(x => this.SelectionChanged(x))">
+                <MudList T="IDataSource" SelectionMode="@this.GetListSelectionMode()" @bind-SelectedValues:get="@this.selectedDataSources" @bind-SelectedValues:set="@(x => this.SelectionChanged(x))">
                     @foreach (var source in this.availableDataSources)
                     {
                         <MudListItem Value="@source">

app/MindWork AI Studio/Components/DataSourceSelection.razor.cs

@@ -26,6 +26,9 @@ public partial class DataSourceSelection : ComponentBase, IMessageBusReceiver, I
     [Parameter]
     public EventCallback<DataSourceOptions> DataSourceOptionsChanged { get; set; }
 
+    [Parameter]
+    public IReadOnlyList<DataSourceAgentSelected> DataSourcesAISelected { get; set; } = [];
+    
     [Parameter]
     public string ConfigurationHeaderMessage { get; set; } = string.Empty;
     
@@ -58,7 +61,7 @@ public partial class DataSourceSelection : ComponentBase, IMessageBusReceiver, I
     protected override async Task OnInitializedAsync()
     {
         this.MessageBus.RegisterComponent(this);
-        this.MessageBus.ApplyFilters(this, [], [ Event.COLOR_THEME_CHANGED ]);
+        this.MessageBus.ApplyFilters(this, [], [ Event.COLOR_THEME_CHANGED, Event.RAG_AUTO_DATA_SOURCES_SELECTED ]);
         
         //
         // Load the settings:
@@ -129,9 +132,17 @@ public partial class DataSourceSelection : ComponentBase, IMessageBusReceiver, I
 
     #endregion
 
-    public void ChangeOptionWithoutSaving(DataSourceOptions options)
+    private SelectionMode GetListSelectionMode() => this.aiBasedSourceSelection ? MudBlazor.SelectionMode.SingleSelection : MudBlazor.SelectionMode.MultiSelection;
+    
+    private IReadOnlyCollection<DataSourceAgentSelected> GetSelectedDataSourcesWithAI() => this.DataSourcesAISelected.Where(n => n.Selected).ToList();
+
+    private string GetAIReasoning(DataSourceAgentSelected source) => $"AI reasoning (confidence {source.AIDecision.Confidence:P0}): {source.AIDecision.Reason}";
+    
+    public void ChangeOptionWithoutSaving(DataSourceOptions options, IReadOnlyList<DataSourceAgentSelected>? aiSelectedDataSources = null)
     {
         this.DataSourceOptions = options;
+        this.DataSourcesAISelected = aiSelectedDataSources ?? [];
+        
         this.aiBasedSourceSelection = this.DataSourceOptions.AutomaticDataSourceSelection;
         this.aiBasedValidation = this.DataSourceOptions.AutomaticValidation;
         this.areDataSourcesEnabled = !this.DataSourceOptions.DisableDataSources;
@@ -237,6 +248,13 @@ public partial class DataSourceSelection : ComponentBase, IMessageBusReceiver, I
                 this.showDataSourceSelection = false;
                 this.StateHasChanged();
                 break;
+            
+            case Event.RAG_AUTO_DATA_SOURCES_SELECTED:
+                if(data is IReadOnlyList<DataSourceAgentSelected> aiSelectedDataSources)
+                    this.DataSourcesAISelected = aiSelectedDataSources;
+                    
+                this.StateHasChanged();
+                break;
         }
         
         return Task.CompletedTask;

app/MindWork AI Studio/Components/Settings/SettingsPanelAgentDataSourceSelection.razor

@@ -0,0 +1,11 @@
+@inherits SettingsPanelBase
+
+<ExpansionPanel HeaderIcon="@Icons.Material.Filled.SelectAll" HeaderText="Agent: Data Source Selection Options">
+    <MudPaper Class="pa-3 mb-8 border-dashed border rounded-lg">
+        <MudText Typo="Typo.body1" Class="mb-3">
+            Use Case: this agent is used to select the appropriate data sources for the current prompt.
+        </MudText>
+        <ConfigurationOption OptionDescription="Preselect data source selection options?" LabelOn="Options are preselected" LabelOff="No options are preselected" State="@(() => this.SettingsManager.ConfigurationData.AgentDataSourceSelection.PreselectAgentOptions)" StateUpdate="@(updatedState => this.SettingsManager.ConfigurationData.AgentDataSourceSelection.PreselectAgentOptions = updatedState)" OptionHelp="When enabled, you can preselect some agent options. This is might be useful when you prefer a LLM."/>
+        <ConfigurationProviderSelection Data="@this.AvailableLLMProvidersFunc()" Disabled="@(() => !this.SettingsManager.ConfigurationData.AgentDataSourceSelection.PreselectAgentOptions)" SelectedValue="@(() => this.SettingsManager.ConfigurationData.AgentDataSourceSelection.PreselectedAgentProvider)" SelectionUpdate="@(selectedValue => this.SettingsManager.ConfigurationData.AgentDataSourceSelection.PreselectedAgentProvider = selectedValue)"/>
+    </MudPaper>
+</ExpansionPanel>

app/MindWork AI Studio/Components/Settings/SettingsPanelAgentDataSourceSelection.razor.cs

@@ -0,0 +1,3 @@
+namespace AIStudio.Components.Settings;
+
+public partial class SettingsPanelAgentDataSourceSelection : SettingsPanelBase;

app/MindWork AI Studio/Pages/Settings.razor

@@ -27,6 +27,7 @@
             <SettingsPanelSynonyms AvailableLLMProvidersFunc="() => this.availableLLMProviders" />
             <SettingsPanelMyTasks AvailableLLMProvidersFunc="() => this.availableLLMProviders" />
             <SettingsPanelAssistantBias AvailableLLMProvidersFunc="() => this.availableLLMProviders" />
+            <SettingsPanelAgentDataSourceSelection AvailableLLMProvidersFunc="() => this.availableLLMProviders" />
             <SettingsPanelAgentContentCleaner AvailableLLMProvidersFunc="() => this.availableLLMProviders" />
         </MudExpansionPanels>
     </InnerScrolling>

app/MindWork AI Studio/Program.cs

@@ -21,6 +21,7 @@ internal sealed class Program
     public static RustService RUST_SERVICE = null!;
     public static Encryption ENCRYPTION = null!;
     public static string API_TOKEN = null!;
+    public static IServiceProvider SERVICE_PROVIDER = null!;
     
     public static async Task Main(string[] args)
     {
@@ -117,6 +118,7 @@ internal sealed class Program
         builder.Services.AddSingleton<ThreadSafeRandom>();
         builder.Services.AddSingleton<DataSourceService>();
         builder.Services.AddTransient<HTMLParser>();
+        builder.Services.AddTransient<AgentDataSourceSelection>();
         builder.Services.AddTransient<AgentTextContentCleaner>();
         builder.Services.AddHostedService<UpdateService>();
         builder.Services.AddHostedService<TemporaryChatService>();
@@ -148,6 +150,10 @@ internal sealed class Program
         var programLogger = app.Services.GetRequiredService<ILogger<Program>>();
         programLogger.LogInformation("Starting the AI Studio server.");
         
+        // Store the service provider (DI). We need it later for some classes,
+        // which are not part of the request pipeline:
+        SERVICE_PROVIDER = app.Services;
+        
         // Initialize the encryption service:
         programLogger.LogInformation("Initializing the encryption service.");
         var encryptionLogger = app.Services.GetRequiredService<ILogger<Encryption>>();
@@ -196,5 +202,8 @@ internal sealed class Program
         };
         
         await serverTask;
+        
+        RUST_SERVICE.Dispose();
+        programLogger.LogInformation("The AI Studio server was stopped.");
     }
 }

app/MindWork AI Studio/Settings/DataModel/Data.cs

@@ -74,6 +74,8 @@ public sealed class Data
 
     public DataTextContentCleaner TextContentCleaner { get; init; } = new();
     
+    public DataAgentDataSourceSelection AgentDataSourceSelection { get; init; } = new();
+    
     public DataAgenda Agenda { get; init; } = new();
     
     public DataGrammarSpelling GrammarSpelling { get; init; } = new();

app/MindWork AI Studio/Settings/DataModel/DataAgentDataSourceSelection.cs

@@ -0,0 +1,14 @@
+namespace AIStudio.Settings.DataModel;
+
+public sealed class DataAgentDataSourceSelection
+{
+    /// <summary>
+    /// Preselect any text content cleaner options?
+    /// </summary>
+    public bool PreselectAgentOptions { get; set; }
+    
+    /// <summary>
+    /// Preselect a text content cleaner provider?
+    /// </summary>
+    public string PreselectedAgentProvider { get; set; } = string.Empty;
+}

app/MindWork AI Studio/Settings/DataModel/DataSourceERI_V1.cs

@@ -1,5 +1,6 @@
 // ReSharper disable InconsistentNaming
 
+using AIStudio.Assistants.ERI;
 using AIStudio.Tools.ERIClient.DataModel;
 
 namespace AIStudio.Settings.DataModel;
@@ -39,4 +40,7 @@ public readonly record struct DataSourceERI_V1 : IERIDataSource
 
     /// <inheritdoc />
     public DataSourceSecurity SecurityPolicy { get; init; } = DataSourceSecurity.NOT_SPECIFIED;
+    
+    /// <inheritdoc />
+    public ERIVersion Version { get; init; } = ERIVersion.V1;
 }

app/MindWork AI Studio/Settings/IERIDataSource.cs

@@ -1,3 +1,4 @@
+using AIStudio.Assistants.ERI;
 using AIStudio.Tools.ERIClient.DataModel;
 
 namespace AIStudio.Settings;
@@ -23,4 +24,9 @@ public interface IERIDataSource : IExternalDataSource
     /// The username to use for authentication, when the auth. method is USERNAME_PASSWORD.
     /// </summary>
     public string Username { get; init; }
+    
+    /// <summary>
+    /// The ERI specification to use.
+    /// </summary>
+    public ERIVersion Version { get; init; }
 }

app/MindWork AI Studio/Tools/Event.cs

@@ -23,6 +23,9 @@ public enum Event
     WORKSPACE_LOADED_CHAT_CHANGED,
     WORKSPACE_TOGGLE_OVERLAY,
     
+    // RAG events:
+    RAG_AUTO_DATA_SOURCES_SELECTED,
+    
     // Send events:
     SEND_TO_GRAMMAR_SPELLING_ASSISTANT,
     SEND_TO_ICON_FINDER_ASSISTANT,

app/MindWork AI Studio/wwwroot/changelog/v0.9.29.md

@@ -2,5 +2,6 @@
 - Added the possibility to select data sources for chats. This preview feature is hidden behind the RAG feature flag, check your app options in case you want to enable it.
 - Added an option to all data sources to select a local security policy. This preview feature is hidden behind the RAG feature flag.
 - Added an option to preselect data sources and options for new chats. This preview feature is hidden behind the RAG feature flag.
+- Added an agent to select the appropriate data sources for any prompt. This preview feature is hidden behind the RAG feature flag.
 - Improved confidence card for small spaces.
 - Fixed a bug in which 'APP_SETTINGS' appeared as a valid destination in the "send to" menu.