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.NET: Add CreateSessionAsync overload with taskId for A2AAgent session resumption (#3924)

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* Initial plan

* Add CreateSessionAsync overload with contextId and taskId parameters

Co-authored-by: westey-m <164392973+westey-m@users.noreply.github.com>

* Update dotnet/tests/Microsoft.Agents.AI.A2A.UnitTests/A2AAgentTests.cs

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Add parameter validation to CreateSessionAsync methods

Co-authored-by: westey-m <164392973+westey-m@users.noreply.github.com>

* Inline parameter validation in CreateSessionAsync methods

Co-authored-by: westey-m <164392973+westey-m@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: westey-m <164392973+westey-m@users.noreply.github.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
This commit is contained in:
Copilot
2026-02-16 14:13:40 +00:00
committed by GitHub
co-authored by westey-m Copilot copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
parent b68d0f93e3
commit 7ae4b7b537
2 changed files with 104 additions and 1 deletions
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dotnet/src/Microsoft.Agents.AI.A2A/A2AAgent.cs
+10 -1
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@@ -63,7 +63,16 @@ public sealed class A2AAgent : AIAgent
/// <param name="contextId">The context id to continue.</param>
/// <returns>A value task representing the asynchronous operation. The task result contains a new <see cref="AgentSession"/> instance.</returns>
public ValueTask<AgentSession> CreateSessionAsync(string contextId)
=> new(new A2AAgentSession() { ContextId = contextId });
=> new(new A2AAgentSession() { ContextId = Throw.IfNullOrWhitespace(contextId) });
/// <summary>
/// Get a new <see cref="AgentSession"/> instance using an existing context id and task id, to resume that conversation from a specific task.
/// </summary>
/// <param name="contextId">The context id to continue.</param>
/// <param name="taskId">The task id to resume from.</param>
/// <returns>A value task representing the asynchronous operation. The task result contains a new <see cref="AgentSession"/> instance.</returns>
public ValueTask<AgentSession> CreateSessionAsync(string contextId, string taskId)
=> new(new A2AAgentSession() { ContextId = Throw.IfNullOrWhitespace(contextId), TaskId = Throw.IfNullOrWhitespace(taskId) });
/// <inheritdoc/>
protected override ValueTask<JsonElement> SerializeSessionCoreAsync(AgentSession session, JsonSerializerOptions? jsonSerializerOptions = null, CancellationToken cancellationToken = default)