Add ModelContextProtocol.Core package (#428)

src/ModelContextProtocol.Core/Protocol/ListPromptsResult.cs

@@ -0,0 +1,28 @@
+using System.Text.Json.Serialization;
+
+namespace ModelContextProtocol.Protocol;
+
+/// <summary>
+/// Represents a server's response to a <see cref="RequestMethods.PromptsList"/> request from the client, containing available prompts.
+/// </summary>
+/// <remarks>
+/// <para>
+/// This result is returned when a client sends a <see cref="RequestMethods.PromptsList"/> request to discover available prompts on the server.
+/// </para>
+/// <para>
+/// It inherits from <see cref="PaginatedResult"/>, allowing for paginated responses when there are many prompts.
+/// The server can provide the <see cref="PaginatedResult.NextCursor"/> property to indicate there are more
+/// prompts available beyond what was returned in the current response.
+/// </para>
+/// <para>
+/// See the <see href="https://github.com/modelcontextprotocol/specification/blob/main/schema/">schema</see> for details.
+/// </para>
+/// </remarks>
+public class ListPromptsResult : PaginatedResult
+{
+    /// <summary>
+    /// A list of prompts or prompt templates that the server offers.
+    /// </summary>
+    [JsonPropertyName("prompts")]
+    public List<Prompt> Prompts { get; set; } = [];
+}