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Evaluation - Workflow Expected Outputs

This sample demonstrates evaluating a multi-agent workflow's final answer against a golden expected output using Foundry's reference-based Similarity evaluator.

What this sample demonstrates

  • Building a small researcher → editor workflow
  • Running the workflow and obtaining a Run
  • Calling run.EvaluateAsync(evaluator, expectedOutput: ...) to attach a ground-truth answer to the overall workflow item
  • Using FoundryEvals.Similarity, which requires a ground_truth value per item

The expectedOutput value is stamped onto the overall EvalItem.ExpectedOutput and is surfaced to Foundry as ground_truth in the JSONL payload sent to the Evals API.

Prerequisites

  • .NET 10 SDK or later
  • Azure authentication available to DefaultAzureCredential (for local development, run az login)

Set the following environment variables:

$env:FOUNDRY_PROJECT_ENDPOINT="https://your-foundry-service.services.ai.azure.com/api/projects/your-foundry-project"
$env:FOUNDRY_MODEL="gpt-4o-mini"

Run the sample

cd dotnet/samples/03-workflows/Evaluation
dotnet run --project .\Evaluation_WorkflowExpectedOutputs