add reasoning effort in chart plot

src/Plugins/BotSharp.Plugin.ChartHandler/Functions/PlotChartFn.cs

@@ -36,10 +36,7 @@ public async Task<bool> Execute(RoleDialogModel message)
             Id = agent.Id,
             Name = agent.Name,
             Instruction = inst,
-            LlmConfig = new AgentLlmConfig
-            {
-                MaxOutputTokens = _settings?.ChartPlot?.MaxOutputTokens ?? 8192
-            },
+            LlmConfig = GetLlmConfig(),
             TemplateDict = new Dictionary<string, object>
             {
                 { "plotting_requirement", args?.PlottingRequirement ?? string.Empty },
@@ -147,4 +144,20 @@ private string GetChartPlotInstruction(string agentId)
 
         return (provider, model);
     }
+
+    private AgentLlmConfig GetLlmConfig()
+    {
+        var maxOutputTokens = _settings?.ChartPlot?.MaxOutputTokens ?? 8192;
+        var reasoningEffortLevel = _settings?.ChartPlot?.ReasoningEffortLevel ?? "minimal";
+
+        var state = _services.GetRequiredService<IConversationStateService>();
+        maxOutputTokens = int.TryParse(state.GetState("chart_plot_max_output_tokens"), out var tokens) ? tokens : maxOutputTokens;
+        reasoningEffortLevel = state.GetState("chart_plot_reasoning_effort_level").IfNullOrEmptyAs(reasoningEffortLevel);
+
+        return new AgentLlmConfig
+        {
+            MaxOutputTokens = maxOutputTokens,
+            ReasoningEffortLevel = reasoningEffortLevel
+        };
+    }
 }

src/Plugins/BotSharp.Plugin.ChartHandler/Settings/ChartHandlerSettings.cs

@@ -10,4 +10,5 @@ public class ChartPlotSetting
     public string? LlmProvider { get; set; }
     public string? LlmModel { get; set; }
     public int? MaxOutputTokens { get; set; }
+    public string? ReasoningEffortLevel { get; set; }
 }

src/Plugins/BotSharp.Plugin.ChartHandler/data/agents/6745151e-6d46-4a02-8de4-1c4f21c7da95/templates/util-chart-plot_instruction.liquid

@@ -19,7 +19,7 @@ You must strictly follow the "Hard Requirements", "Render Requirements", "Code R
     * Ensure the chart fully expands and scales to the entire screen when fullscreen is active.
     * fullscreenBtn must be a fully-formed object {show: true, name, title, icon: 'path://M3 3 H9 V5 H5 V9 H3 Z M15 3 H21 V9 H19 V5 H15 Z M3 15 H5 V19 H9 V21 H3 Z M19 15 H21 V21 H15 V19 H19 Z', onclick}.
     * When using "chart.setOption" to define the fullscreen button, DO NOT use "graphic". Include the fullscreenBtn object in toolbox.feature with name 'myFullscreen'.
-** Initialize the chart with explicit non-zero width (at least 800px) and non-zero height (at least 500px).
+** You must initialize the chart with explicit non-zero width (at least 800px) and non-zero height (at least 500px).
 
 
 ***** Render Requirements *****

src/WebStarter/appsettings.json

@@ -320,7 +320,9 @@
   "ChartHandler": {
     "ChartPlot": {
       "LlmProvider": "openai",
-      "LlmModel": "gpt-5"
+      "LlmModel": "gpt-5",
+      "MaxOutputTokens": 8192,
+      "ReasoningEffortLevel": "minimal"
     }
   },