Add ReasoningEffort.minimal value (#673)

Author: kurnakovv

specification/base/typespec/common/models.tsp

@@ -224,11 +224,12 @@ model ChatCompletionStreamOptions {
   
   Constrains effort on reasoning for
   [reasoning models](https://platform.openai.com/docs/guides/reasoning).
-  Currently supported values are `low`, `medium`, and `high`. Reducing
+  Currently supported values are `minimal`, `low`, `medium`, and `high`. Reducing
   reasoning effort can result in faster responses and fewer tokens used
   on reasoning in a response.
   """)
 union ReasoningEffort {
+  "minimal",
   "low",
   "medium",
   "high",

src/Generated/Models/Chat/ChatReasoningEffortLevel.cs

@@ -13,6 +13,7 @@ namespace OpenAI.Chat
     public readonly partial struct ChatReasoningEffortLevel : IEquatable<ChatReasoningEffortLevel>
     {
         private readonly string _value;
+        private const string MinimalValue = "minimal";
         private const string LowValue = "low";
         private const string MediumValue = "medium";
         private const string HighValue = "high";
@@ -24,6 +25,8 @@ public ChatReasoningEffortLevel(string value)
             _value = value;
         }
 
+        public static ChatReasoningEffortLevel Minimal { get; } = new ChatReasoningEffortLevel(MinimalValue);
+
         public static ChatReasoningEffortLevel Low { get; } = new ChatReasoningEffortLevel(LowValue);
 
         public static ChatReasoningEffortLevel Medium { get; } = new ChatReasoningEffortLevel(MediumValue);

src/Generated/Models/Responses/ResponseReasoningEffortLevel.cs

@@ -13,6 +13,7 @@ namespace OpenAI.Responses
     public readonly partial struct ResponseReasoningEffortLevel : IEquatable<ResponseReasoningEffortLevel>
     {
         private readonly string _value;
+        private const string MinimalValue = "minimal";
         private const string LowValue = "low";
         private const string MediumValue = "medium";
         private const string HighValue = "high";
@@ -24,6 +25,8 @@ public ResponseReasoningEffortLevel(string value)
             _value = value;
         }
 
+        public static ResponseReasoningEffortLevel Minimal { get; } = new ResponseReasoningEffortLevel(MinimalValue);
+
         public static ResponseReasoningEffortLevel Low { get; } = new ResponseReasoningEffortLevel(LowValue);
 
         public static ResponseReasoningEffortLevel Medium { get; } = new ResponseReasoningEffortLevel(MediumValue);