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Fix handoff function names (#178)

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* Fix handoff function names

Handoffs are including the agent name in the function name. But the agent name can include characters that are invalid for a function name, which results in errors. Replace them.

* Update dotnet/src/Microsoft.Agents.Orchestration/Handoff/HandoffActor.cs

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

---------

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
This commit is contained in:
Stephen Toub
2025-07-11 21:35:10 -04:00
committed by GitHub
Unverified
parent 94e00bd49a
commit 18299bc701
1 changed files with 12 additions and 2 deletions
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dotnet/src/Microsoft.Agents.Orchestration/Handoff/HandoffActor.cs
+12 -2
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@@ -2,6 +2,7 @@
using System;
using System.Collections.Generic;
using System.Text.RegularExpressions;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.Extensions.AI;
@@ -14,7 +15,7 @@ namespace Microsoft.Agents.Orchestration;
/// <summary>
/// An actor used with the <see cref="HandoffOrchestration{TInput,TOutput}"/>.
/// </summary>
internal sealed class HandoffActor : AgentActor
internal sealed partial class HandoffActor : AgentActor
{
private readonly ChatClientAgent _chatAgent;
private readonly HandoffLookup _handoffs;
@@ -155,7 +156,7 @@ internal sealed class HandoffActor : AgentActor
AIFunction handoffFunction =
AIFunctionFactory.Create(
() => this.Handoff(handoff.Key),
name: $"transfer_to_{handoff.Key}",
name: $"transfer_to_{InvalidNameCharsRegex().Replace(handoff.Key, "_")}",
description: handoff.Value.Description);
yield return handoffFunction;
@@ -181,4 +182,13 @@ internal sealed class HandoffActor : AgentActor
FunctionInvokingChatClient.CurrentContext.Terminate = true;
}
}
/// <summary>Regex that flags any character other than ASCII digits or letters or the underscore.</summary>
#if NET
[GeneratedRegex("[^0-9A-Za-z_]+")]
private static partial Regex InvalidNameCharsRegex();
#else
private static Regex InvalidNameCharsRegex() => s_invalidNameCharsRegex;
private static readonly Regex s_invalidNameCharsRegex = new("[^0-9A-Za-z_]+", RegexOptions.Compiled);
#endif
}