Restore deleted members as obsolete

src/Libraries/Microsoft.Extensions.AI.Abstractions/ChatCompletion/ChatOptions.cs

@@ -9,6 +9,16 @@ namespace Microsoft.Extensions.AI;
 /// <summary>Represents the options for a chat request.</summary>
 public class ChatOptions
 {
+    /// <summary>Gets or sets an optional identifier used to associate a request with an existing conversation.</summary>
+    /// <remarks>This property is obsolete. Use <see cref="ConversationId"/> instead.</remarks>
+    [System.Obsolete("Use ConversationId instead.")]
+    [System.ComponentModel.EditorBrowsable(System.ComponentModel.EditorBrowsableState.Never)]
+    public string? ChatThreadId
+    {
+        get => ConversationId;
+        set => ConversationId = value;
+    }
+
     /// <summary>Gets or sets an optional identifier used to associate a request with an existing conversation.</summary>
     public string? ConversationId { get; set; }
 

src/Libraries/Microsoft.Extensions.AI.Abstractions/ChatCompletion/ChatResponse.cs

@@ -63,6 +63,25 @@ public IList<ChatMessage> Messages
     /// <summary>Gets or sets the ID of the chat response.</summary>
     public string? ResponseId { get; set; }
 
+    /// <summary>Gets or sets an identifier for the state of the conversation.</summary>
+    /// <remarks>
+    /// Some <see cref="IChatClient"/> implementations are capable of storing the state for a conversation, such that
+    /// the input messages supplied to <see cref="IChatClient.GetResponseAsync"/> need only be the additional messages beyond
+    /// what's already stored. If this property is non-<see langword="null"/>, it represents an identifier for that state,
+    /// and it should be used in a subsequent <see cref="ChatOptions.ConversationId"/> instead of supplying the same messages
+    /// (and this <see cref="ChatResponse"/>'s message) as part of the <c>messages</c> parameter. Note that the value may
+    /// or may not differ on every response, depending on whether the underlying provider uses a fixed ID for each conversation
+    /// or updates it for each message.
+    /// </remarks>
+    /// <remarks>This method is obsolete. Use <see cref="ConversationId"/> instead.</remarks>
+    [Obsolete("Use ConversationId instead.")]
+    [System.ComponentModel.EditorBrowsable(System.ComponentModel.EditorBrowsableState.Never)]
+    public string? ChatThreadId
+    {
+        get => ConversationId;
+        set => ConversationId = value;
+    }
+
     /// <summary>Gets or sets an identifier for the state of the conversation.</summary>
     /// <remarks>
     /// Some <see cref="IChatClient"/> implementations are capable of storing the state for a conversation, such that

src/Libraries/Microsoft.Extensions.AI.Abstractions/ChatCompletion/ChatResponseUpdate.cs

@@ -116,6 +116,24 @@ public IList<AIContent> Contents
     /// </remarks>
     public string? MessageId { get; set; }
 
+    /// <summary>Gets or sets an identifier for the state of the conversation of which this update is a part.</summary>
+    /// <remarks>
+    /// Some <see cref="IChatClient"/> implementations are capable of storing the state for a conversation, such that
+    /// the input messages supplied to <see cref="IChatClient.GetStreamingResponseAsync"/> need only be the additional messages beyond
+    /// what's already stored. If this property is non-<see langword="null"/>, it represents an identifier for that state,
+    /// and it should be used in a subsequent <see cref="ChatOptions.ConversationId"/> instead of supplying the same messages
+    /// (and this streaming message) as part of the <c>messages</c> parameter. Note that the value may or may not differ on every
+    /// response, depending on whether the underlying provider uses a fixed ID for each conversation or updates it for each message.
+    /// </remarks>
+    /// <remarks>This method is obsolete. Use <see cref="ConversationId"/> instead.</remarks>
+    [Obsolete("Use ConversationId instead.")]
+    [System.ComponentModel.EditorBrowsable(System.ComponentModel.EditorBrowsableState.Never)]
+    public string? ChatThreadId
+    {
+        get => ConversationId;
+        set => ConversationId = value;
+    }
+
     /// <summary>Gets or sets an identifier for the state of the conversation of which this update is a part.</summary>
     /// <remarks>
     /// Some <see cref="IChatClient"/> implementations are capable of storing the state for a conversation, such that

src/Libraries/Microsoft.Extensions.AI.Abstractions/Embeddings/EmbeddingGeneratorExtensions.cs

@@ -87,6 +87,35 @@ public static TService GetRequiredService<TService>(
         return service;
     }
 
+    /// <summary>Generates an embedding vector from the specified <paramref name="value"/>.</summary>
+    /// <typeparam name="TInput">The type from which embeddings will be generated.</typeparam>
+    /// <typeparam name="TEmbeddingElement">The numeric type of the embedding data.</typeparam>
+    /// <param name="generator">The embedding generator.</param>
+    /// <param name="value">A value from which an embedding will be generated.</param>
+    /// <param name="options">The embedding generation options to configure the request.</param>
+    /// <param name="cancellationToken">The <see cref="CancellationToken"/> to monitor for cancellation requests. The default is <see cref="CancellationToken.None"/>.</param>
+    /// <returns>The generated embedding for the specified <paramref name="value"/>.</returns>
+    /// <exception cref="ArgumentNullException"><paramref name="generator"/> is <see langword="null"/>.</exception>
+    /// <exception cref="ArgumentNullException"><paramref name="value"/> is <see langword="null"/>.</exception>
+    /// <exception cref="InvalidOperationException">The generator did not produce exactly one embedding.</exception>
+    /// <remarks>
+    /// This operation is equivalent to using <see cref="GenerateAsync"/> and returning the
+    /// resulting <see cref="Embedding{T}"/>'s <see cref="Embedding{T}.Vector"/> property.
+    /// </remarks>
+    /// <remarks>
+    /// This method is obsolete. Use <see cref="GenerateVectorAsync{TInput, TEmbeddingElement}"/> instead.
+    /// </remarks>
+    [Obsolete("Use GenerateVectorAsync<TInput, TEmbeddingElement> instead.")]
+    [System.ComponentModel.EditorBrowsable(System.ComponentModel.EditorBrowsableState.Never)]
+    public static async Task<ReadOnlyMemory<TEmbeddingElement>> GenerateEmbeddingVectorAsync<TInput, TEmbeddingElement>(
+        this IEmbeddingGenerator<TInput, Embedding<TEmbeddingElement>> generator,
+        TInput value,
+        EmbeddingGenerationOptions? options = null,
+        CancellationToken cancellationToken = default)
+    {
+        return await GenerateVectorAsync(generator, value, options, cancellationToken).ConfigureAwait(false);
+    }
+
     /// <summary>Generates an embedding vector from the specified <paramref name="value"/>.</summary>
     /// <typeparam name="TInput">The type from which embeddings will be generated.</typeparam>
     /// <typeparam name="TEmbeddingElement">The numeric type of the embedding data.</typeparam>
@@ -112,6 +141,39 @@ public static async Task<ReadOnlyMemory<TEmbeddingElement>> GenerateVectorAsync<
         return embedding.Vector;
     }
 
+    /// <summary>Generates an embedding from the specified <paramref name="value"/>.</summary>
+    /// <typeparam name="TInput">The type from which embeddings will be generated.</typeparam>
+    /// <typeparam name="TEmbedding">The type of embedding to generate.</typeparam>
+    /// <param name="generator">The embedding generator.</param>
+    /// <param name="value">A value from which an embedding will be generated.</param>
+    /// <param name="options">The embedding generation options to configure the request.</param>
+    /// <param name="cancellationToken">The <see cref="CancellationToken"/> to monitor for cancellation requests. The default is <see cref="CancellationToken.None"/>.</param>
+    /// <returns>
+    /// The generated embedding for the specified <paramref name="value"/>.
+    /// </returns>
+    /// <exception cref="ArgumentNullException"><paramref name="generator"/> is <see langword="null"/>.</exception>
+    /// <exception cref="ArgumentNullException"><paramref name="value"/> is <see langword="null"/>.</exception>
+    /// <exception cref="InvalidOperationException">The generator did not produce exactly one embedding.</exception>
+    /// <remarks>
+    /// This operations is equivalent to using <see cref="IEmbeddingGenerator{TInput, TEmbedding}.GenerateAsync"/> with a
+    /// collection composed of the single <paramref name="value"/> and then returning the first embedding element from the
+    /// resulting <see cref="GeneratedEmbeddings{TEmbedding}"/> collection.
+    /// </remarks>
+    /// <remarks>
+    /// This method is obsolete. Use <see cref="GenerateAsync{TInput, TEmbedding}"/> instead.
+    /// </remarks>
+    [Obsolete("Use GenerateAsync<TInput, TEmbedding> instead.")]
+    [System.ComponentModel.EditorBrowsable(System.ComponentModel.EditorBrowsableState.Never)]
+    public static async Task<TEmbedding> GenerateEmbeddingAsync<TInput, TEmbedding>(
+        this IEmbeddingGenerator<TInput, TEmbedding> generator,
+        TInput value,
+        EmbeddingGenerationOptions? options = null,
+        CancellationToken cancellationToken = default)
+        where TEmbedding : Embedding
+    {
+        return await GenerateAsync(generator, value, options, cancellationToken).ConfigureAwait(false);
+    }
+
     /// <summary>Generates an embedding from the specified <paramref name="value"/>.</summary>
     /// <typeparam name="TInput">The type from which embeddings will be generated.</typeparam>
     /// <typeparam name="TEmbedding">The type of embedding to generate.</typeparam>