.NET: Bring some MEAI types to AF temporarily. (#426)

* Bring some MEAI types to AF temporarily.

* Exclude the copied files from code completion.

dotnet/src/Microsoft.Extensions.AI.Agents/ChatCompletion/ChatClientExtensions.cs

@@ -13,7 +13,7 @@ internal static class ChatClientExtensions
             chatBuilder.UseAgentInvocation();
         }
 
-        if (chatClient.GetService<FunctionInvokingChatClient>() is null)
+        if (chatClient.GetService<NewFunctionInvokingChatClient>() is null)
         {
             chatBuilder.UseFunctionInvocation();
         }

dotnet/src/Microsoft.Extensions.AI.Agents/MEAI/LoggingHelpers.cs

@@ -0,0 +1,40 @@
+// Copyright (c) Microsoft. All rights reserved.
+
+// WARNING:
+// This class has been temporarily copied here from MEAI, to allow prototyping
+// functionality that will be moved to MEAI in the future.
+// This file is not intended to be modified.
+
+#pragma warning disable CA1031 // Do not catch general exception types
+#pragma warning disable S108 // Nested blocks of code should not be left empty
+#pragma warning disable S2486 // Generic exceptions should not be ignored
+
+using System.Diagnostics.CodeAnalysis;
+using System.Text.Json;
+
+namespace Microsoft.Extensions.AI;
+
+/// <summary>Provides internal helpers for implementing logging.</summary>
+[ExcludeFromCodeCoverage]
+internal static class LoggingHelpers
+{
+    /// <summary>Serializes <paramref name="value"/> as JSON for logging purposes.</summary>
+    public static string AsJson<T>(T value, JsonSerializerOptions? options)
+    {
+        if (options?.TryGetTypeInfo(typeof(T), out var typeInfo) is true ||
+            AIJsonUtilities.DefaultOptions.TryGetTypeInfo(typeof(T), out typeInfo))
+        {
+            try
+            {
+                return JsonSerializer.Serialize(value, typeInfo);
+            }
+            catch
+            {
+            }
+        }
+
+        // If we're unable to get a type info for the value, or if we fail to serialize,
+        // return an empty JSON object. We do not want lack of type info to disrupt application behavior with exceptions.
+        return "{}";
+    }
+}

dotnet/src/Microsoft.Extensions.AI.Agents/MEAI/OpenTelemetryConsts.cs

@@ -0,0 +1,144 @@
+// Copyright (c) Microsoft. All rights reserved.
+
+// WARNING:
+// This class has been temporarily copied here from MEAI, to allow prototyping
+// functionality that will be moved to MEAI in the future.
+// This file is not intended to be modified.
+
+using System.Diagnostics.CodeAnalysis;
+
+namespace Microsoft.Extensions.AI;
+
+#pragma warning disable CA1716 // Identifiers should not match keywords
+#pragma warning disable S4041 // Type names should not match namespaces
+
+/// <summary>Provides constants used by various telemetry services.</summary>
+[ExcludeFromCodeCoverage]
+internal static class OpenTelemetryConsts
+{
+    public const string DefaultSourceName = "Experimental.Microsoft.Extensions.AI";
+
+    public const string SecondsUnit = "s";
+    public const string TokensUnit = "token";
+
+    public static class Event
+    {
+        public const string Name = "event.name";
+    }
+
+    public static class Error
+    {
+        public const string Type = "error.type";
+    }
+
+    public static class GenAI
+    {
+        public const string Choice = "gen_ai.choice";
+        public const string SystemName = "gen_ai.system";
+
+        public const string Chat = "chat";
+        public const string Embeddings = "embeddings";
+        public const string ExecuteTool = "execute_tool";
+
+        public static class Assistant
+        {
+            public const string Message = "gen_ai.assistant.message";
+        }
+
+        public static class Client
+        {
+            public static class OperationDuration
+            {
+                public const string Description = "Measures the duration of a GenAI operation";
+                public const string Name = "gen_ai.client.operation.duration";
+                public static readonly double[] ExplicitBucketBoundaries = [0.01, 0.02, 0.04, 0.08, 0.16, 0.32, 0.64, 1.28, 2.56, 5.12, 10.24, 20.48, 40.96, 81.92];
+            }
+
+            public static class TokenUsage
+            {
+                public const string Description = "Measures number of input and output tokens used";
+                public const string Name = "gen_ai.client.token.usage";
+                public static readonly int[] ExplicitBucketBoundaries = [1, 4, 16, 64, 256, 1_024, 4_096, 16_384, 65_536, 262_144, 1_048_576, 4_194_304, 16_777_216, 67_108_864];
+            }
+        }
+
+        public static class Conversation
+        {
+            public const string Id = "gen_ai.conversation.id";
+        }
+
+        public static class Operation
+        {
+            public const string Name = "gen_ai.operation.name";
+        }
+
+        public static class Output
+        {
+            public const string Type = "gen_ai.output.type";
+        }
+
+        public static class Request
+        {
+            public const string EmbeddingDimensions = "gen_ai.request.embedding.dimensions";
+            public const string FrequencyPenalty = "gen_ai.request.frequency_penalty";
+            public const string Model = "gen_ai.request.model";
+            public const string MaxTokens = "gen_ai.request.max_tokens";
+            public const string PresencePenalty = "gen_ai.request.presence_penalty";
+            public const string Seed = "gen_ai.request.seed";
+            public const string StopSequences = "gen_ai.request.stop_sequences";
+            public const string Temperature = "gen_ai.request.temperature";
+            public const string TopK = "gen_ai.request.top_k";
+            public const string TopP = "gen_ai.request.top_p";
+
+            public static string PerProvider(string providerName, string parameterName) => $"gen_ai.{providerName}.request.{parameterName}";
+        }
+
+        public static class Response
+        {
+            public const string FinishReasons = "gen_ai.response.finish_reasons";
+            public const string Id = "gen_ai.response.id";
+            public const string Model = "gen_ai.response.model";
+
+            public static string PerProvider(string providerName, string parameterName) => $"gen_ai.{providerName}.response.{parameterName}";
+        }
+
+        public static class System
+        {
+            public const string Message = "gen_ai.system.message";
+        }
+
+        public static class Token
+        {
+            public const string Type = "gen_ai.token.type";
+        }
+
+        public static class Tool
+        {
+            public const string Name = "gen_ai.tool.name";
+            public const string Description = "gen_ai.tool.description";
+            public const string Message = "gen_ai.tool.message";
+
+            public static class Call
+            {
+                public const string Id = "gen_ai.tool.call.id";
+            }
+        }
+
+        public static class Usage
+        {
+            public const string InputTokens = "gen_ai.usage.input_tokens";
+            public const string OutputTokens = "gen_ai.usage.output_tokens";
+        }
+
+        public static class User
+        {
+            public const string Message = "gen_ai.user.message";
+        }
+    }
+
+    public static class Server
+    {
+        public const string Address = "server.address";
+        public const string Port = "server.port";
+    }
+}