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.NET - Fix missing id on function_call_output in Foundry Hosting (#6246)

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* Fix missing id on function_call_output in Foundry Hosting

The Foundry storage layer was rejecting responses with
"ID cannot be null or empty (Parameter 'id')" because
function_call_output items emitted by OutputConverter had no id on
the wire.

OutputItemFunctionToolCallOutput's public ctor only sets CallId and
Output; Id is read-only and only the SDK's internal ctor populates
it. OutputItemBuilder<T>.ApplyAutoStamps fills ResponseId and
AgentReference but not Id, so the itemId passed to
AddOutputItem<T>(itemId) was used only for event sequencing and the
serialized item went out with id=null.

Switch to stream.OutputItemFunctionCallOutput(callId, output), the
SDK convenience method that uses the internal ctor and stamps the
id. Add a regression test asserting the added/done events carry a
non-empty matching Id.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* ci: free disk space and relocate NuGet cache on ubuntu runners

The ubuntu-latest dotnet-build/test jobs were hitting No space left on device because the runner image only ships ~14 GB free on /. The full multi-TFM build plus the dotnet pack + console-app install-check exhausts that easily.

Add a reusable composite action .github/actions/free-runner-disk-space that runs on Linux runners only and:

* removes pre-installed toolchains we never use here (Android SDK, GHC/Haskell, CodeQL, PyPy, Ruby, Go, boost, vcpkg, etc.), prunes docker images, and disables swap (reclaims ~25-30 GB on /)

* relocates the NuGet package cache to /mnt/nuget via NUGET_PACKAGES env, since /mnt has ~75 GB free on hosted runners

Wire the action into the four ubuntu-touching jobs in dotnet-build-and-test.yml (dotnet-build, dotnet-test, dotnet-foundry-hosted-it, dotnet-test-functions). The action self-guards with runner.os == 'Linux' so the matrix legs that run on windows are unaffected.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

---------

Co-authored-by: alliscode <25218250+alliscode@users.noreply.github.com>
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
This commit is contained in:
Ben Thomas
2026-06-01 11:43:45 -07:00
committed by GitHub
Unverified
parent 8091d052d8
commit b298113d15
4 changed files with 116 additions and 6 deletions
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dotnet/src/Microsoft.Agents.AI.Foundry.Hosting/OutputConverter.cs
+11 -6
View File
@@ -281,14 +281,19 @@ internal static class OutputConverter
var outputText = EncodeFunctionResultAsJsonStringPayload(functionResult.Result);
var itemId = GenerateItemId("fc");
var outputItem = new OutputItemFunctionToolCallOutput(
// Use the SDK's convenience method so the OutputItemFunctionToolCallOutput
// is constructed with a populated Id. The public OutputItemFunctionToolCallOutput
// ctor only sets CallId/Output (Id is read-only), and AddOutputItem<T>+EmitAdded
// does not auto-stamp Id — only ResponseId/AgentReference. Without this, the
// serialized item arrives at the Foundry storage layer with id=null and is
// rejected with "ID cannot be null or empty (Parameter 'id')".
foreach (var evt in stream.OutputItemFunctionCallOutput(
functionResult.CallId,
BinaryData.FromString(outputText));
BinaryData.FromString(outputText)))
{
yield return evt;
}
var outputBuilder = stream.AddOutputItem<OutputItemFunctionToolCallOutput>(itemId);
yield return outputBuilder.EmitAdded(outputItem);
yield return outputBuilder.EmitDone(outputItem);
break;
}