From f0df939eaf9eb5b39bd23fa63edeb6baa3ea7824 Mon Sep 17 00:00:00 2001
From: Scott Stauffer <scott@fuseraft.com>
Date: Wed, 25 Mar 2026 23:39:28 -0500
Subject: [PATCH] Update function choice behavior

---
 src/Infrastructure/AgentFactory.cs | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/Infrastructure/AgentFactory.cs b/src/Infrastructure/AgentFactory.cs
index d5b5f61..255b5f9 100644
--- a/src/Infrastructure/AgentFactory.cs
+++ b/src/Infrastructure/AgentFactory.cs
@@ -45,7 +45,12 @@ public ChatCompletionAgent Create(AgentConfig config)
 
     private static OpenAIPromptExecutionSettings BuildExecutionSettings(ModelConfig model)
     {
-        var settings = new OpenAIPromptExecutionSettings();
+        var settings = new OpenAIPromptExecutionSettings
+        {
+            // Required for SK to include the tools array in the API request and
+            // auto-invoke kernel functions when the model returns tool calls.
+            FunctionChoiceBehavior = FunctionChoiceBehavior.Auto()
+        };
 
         if (model.Temperature.HasValue)
             settings.Temperature = model.Temperature.Value;