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Applies to:


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Summary

Issue: Scores submitted via the Braintrust feedback API do not appear in the UI for existing traces, and instead create new trace entries with the provided span_id and root_span_id. Cause: The span_id used in the API payload does not match the actual id property in the raw trace data. Resolution: Use the correct id from the raw span data when submitting scores via the feedback API.

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Resolution Steps

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Step 1: Get the correct span ID

Navigate to the trace in the Braintrust UI and click the “Raw span and trace data” button to view the underlying JSON.

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Step 2: Identify the ID field

Locate the id property in the raw trace data JSON - this is the value you need to use in your API calls.

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Step 3: Update your API payload

Use the id from the raw data as the span_id in your feedback API payload: 
payload = {
    "events": [
        {
            "span_id": "correct-id-from-raw-data",
            "root_span_id": "correct-id-from-raw-data",
            "scores": 0.0,
            "metadata": feedback_update["metadata"],
            "_is_merge": True,
            "_merge_paths": merge_paths,
        }
    ]
}

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Step 4: Verify the score appears

Refresh the trace view in the UI to confirm the score is now attached to the existing trace instead of creating a new one.