Initial commit: ClawdDotNet

Import des bestehenden Projektstands in Git.
- .NET 10 WinForms Anwendung (Multi-Agent / Tool-System)
- .gitignore fuer Build-Artefakte, Secrets und Runtime-Daten ergaenzt

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/ClawdDotNet.Core/Api/Models/ChatMessage.cs

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+using System.Text.Json.Serialization;
+
+namespace ClawdDotNet.Core.Api.Models;
+
+public sealed class ChatMessage
+{
+    [JsonPropertyName("role")]
+    public string Role { get; set; } = "";
+
+    [JsonPropertyName("content")]
+    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
+    public string? Content { get; set; }
+
+    [JsonPropertyName("tool_calls")]
+    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
+    public List<ToolCall>? ToolCalls { get; set; }
+
+    [JsonPropertyName("tool_call_id")]
+    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
+    public string? ToolCallId { get; set; }
+
+    public static ChatMessage System(string content) => new() { Role = "system", Content = content };
+    public static ChatMessage User(string content) => new() { Role = "user", Content = content };
+    public static ChatMessage Assistant(string content) => new() { Role = "assistant", Content = content };
+
+    public static ChatMessage AssistantWithToolCalls(List<ToolCall> toolCalls) => new()
+    {
+        Role = "assistant",
+        ToolCalls = toolCalls
+    };
+
+    public static ChatMessage ToolResponse(string toolCallId, string content) => new()
+    {
+        Role = "tool",
+        ToolCallId = toolCallId,
+        Content = content
+    };
+}

src/ClawdDotNet.Core/Api/Models/ChatRequest.cs

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+using System.Text.Json.Serialization;
+
+namespace ClawdDotNet.Core.Api.Models;
+
+public sealed class ChatRequest
+{
+    [JsonPropertyName("model")]
+    public string Model { get; set; } = "";
+
+    [JsonPropertyName("messages")]
+    public List<ChatMessage> Messages { get; set; } = new();
+
+    [JsonPropertyName("tools")]
+    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
+    public List<ToolDefinition>? Tools { get; set; }
+
+    [JsonPropertyName("tool_choice")]
+    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
+    public string? ToolChoice { get; set; }
+
+    [JsonPropertyName("temperature")]
+    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
+    public double? Temperature { get; set; }
+
+    [JsonPropertyName("max_tokens")]
+    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
+    public int? MaxTokens { get; set; }
+
+    [JsonPropertyName("stream")]
+    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingDefault)]
+    public bool Stream { get; set; }
+}

src/ClawdDotNet.Core/Api/Models/ChatResponse.cs

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+using System.Text.Json.Serialization;
+
+namespace ClawdDotNet.Core.Api.Models;
+
+public sealed class ChatResponse
+{
+    [JsonPropertyName("id")]
+    public string Id { get; set; } = "";
+
+    [JsonPropertyName("choices")]
+    public List<Choice> Choices { get; set; } = new();
+
+    [JsonPropertyName("usage")]
+    public Usage? Usage { get; set; }
+
+    [JsonPropertyName("model")]
+    public string? Model { get; set; }
+
+    [JsonPropertyName("error")]
+    public ApiError? Error { get; set; }
+}
+
+public sealed class Choice
+{
+    [JsonPropertyName("index")]
+    public int Index { get; set; }
+
+    [JsonPropertyName("message")]
+    public ChatMessage Message { get; set; } = new();
+
+    [JsonPropertyName("finish_reason")]
+    public string? FinishReason { get; set; }
+}
+
+public sealed class Usage
+{
+    [JsonPropertyName("prompt_tokens")]
+    public int PromptTokens { get; set; }
+
+    [JsonPropertyName("completion_tokens")]
+    public int CompletionTokens { get; set; }
+
+    [JsonPropertyName("total_tokens")]
+    public int TotalTokens { get; set; }
+}
+
+public sealed class ApiError
+{
+    [JsonPropertyName("message")]
+    public string Message { get; set; } = "";
+
+    [JsonPropertyName("code")]
+    public int? Code { get; set; }
+}

src/ClawdDotNet.Core/Api/Models/ModelInfo.cs

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+namespace ClawdDotNet.Core.Api.Models;
+
+/// <summary>
+/// Repräsentiert ein verfügbares LLM-Modell von OpenRouter.
+/// </summary>
+public sealed class ModelInfo
+{
+    /// <summary>OpenRouter Modell-ID (z.B. "anthropic/claude-sonnet-4-5")</summary>
+    public string Id { get; set; } = "";
+
+    /// <summary>Anzeigename des Modells</summary>
+    public string Name { get; set; } = "";
+
+    public override string ToString() => Id;
+}

src/ClawdDotNet.Core/Api/Models/ToolCall.cs

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+using System.Text.Json.Serialization;
+
+namespace ClawdDotNet.Core.Api.Models;
+
+public sealed class ToolCall
+{
+    [JsonPropertyName("id")]
+    public string Id { get; set; } = "";
+
+    [JsonPropertyName("type")]
+    public string Type { get; set; } = "function";
+
+    [JsonPropertyName("function")]
+    public ToolCallFunction Function { get; set; } = new();
+}
+
+public sealed class ToolCallFunction
+{
+    [JsonPropertyName("name")]
+    public string Name { get; set; } = "";
+
+    [JsonPropertyName("arguments")]
+    public string Arguments { get; set; } = "";
+}

src/ClawdDotNet.Core/Api/Models/ToolDefinition.cs

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+using System.Text.Json;
+using System.Text.Json.Serialization;
+
+namespace ClawdDotNet.Core.Api.Models;
+
+public sealed class ToolDefinition
+{
+    [JsonPropertyName("type")]
+    public string Type { get; set; } = "function";
+
+    [JsonPropertyName("function")]
+    public FunctionDefinition Function { get; set; } = new();
+}
+
+public sealed class FunctionDefinition
+{
+    [JsonPropertyName("name")]
+    public string Name { get; set; } = "";
+
+    [JsonPropertyName("description")]
+    public string Description { get; set; } = "";
+
+    [JsonPropertyName("parameters")]
+    public JsonElement Parameters { get; set; }
+}