初始提交

Workflows/CityParseExecutor.cs

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+using MAF1.Agents.FileCity;
+using Microsoft.Agents.AI.Workflows;
+using Microsoft.Extensions.AI;
+
+namespace MAF1.Workflows;
+
+/// <summary>
+/// 边条件模式：这里只解析，不做 if。走哪条边由 AddEdge 的 condition 决定。
+/// </summary>
+internal sealed class CityParseExecutor() : ChatProtocolExecutor(
+    "CityParse",
+    new ChatProtocolExecutorOptions { AutoSendTurnToken = false })
+{
+    protected override ProtocolBuilder ConfigureProtocol(ProtocolBuilder builder)
+    {
+        return base.ConfigureProtocol(builder).SendsMessage<CityExtraction>();
+    }
+
+    protected override async ValueTask TakeTurnAsync(
+        List<ChatMessage> messages,
+        IWorkflowContext context,
+        bool? emitEvents,
+        CancellationToken cancellationToken)
+    {
+        string text = string.Join(
+            Environment.NewLine,
+            messages
+                .Where(message => !string.IsNullOrWhiteSpace(message.Text))
+                .Select(message => message.Text));
+
+        await context.SendMessageAsync(FileCityAgent.Parse(text), cancellationToken: cancellationToken);
+    }
+}