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const evaluation = await tracia.spans.evaluate(spanId, options);
Submit an evaluation for a span. Evaluations allow you to score spans, providing feedback on response quality.

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Parameters

ParameterTypeRequiredDescription
spanIdstringYesThe span ID to evaluate
options.evaluatorstringYesThe evaluator key. Currently only quality is supported.
options.valuenumberYesThe evaluation score. Use Eval.POSITIVE (1) or Eval.NEGATIVE (0)
options.notestringNoOptional note explaining the evaluation

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Response

interface EvaluateResult {
  id: string;
  evaluatorKey: string;
  evaluatorName: string;
  value: number;
  source: string;
  note: string | null;
  createdAt: string;
}

​
Examples

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Binary Evaluation (Thumbs Up/Down)

import { Tracia, Eval } from 'tracia';

const tracia = new Tracia({ apiKey: process.env.TRACIA_API_KEY });

// Positive evaluation
await tracia.spans.evaluate('sp_abc123def456', {
  evaluator: 'quality',
  value: Eval.POSITIVE
});

// Negative evaluation
await tracia.spans.evaluate('sp_abc123def456', {
  evaluator: 'quality',
  value: Eval.NEGATIVE
});

​
Adding a Note

await tracia.spans.evaluate('sp_abc123def456', {
  evaluator: 'quality',
  value: Eval.NEGATIVE,
  note: 'Response was off-topic and did not address the user question'
});

​
User Feedback Integration

// Capture user feedback from your application
async function submitUserFeedback(spanId: string, isHelpful: boolean, comment?: string) {
  await tracia.spans.evaluate(spanId, {
    evaluator: 'quality',
    value: isHelpful ? Eval.POSITIVE : Eval.NEGATIVE,
    note: comment
  });
}

​
Error Handling

import { Tracia, TraciaError, TraciaErrorCode, Eval } from 'tracia';

try {
  await tracia.spans.evaluate('sp_abc123def456', {
    evaluator: 'quality',
    value: Eval.POSITIVE
  });
} catch (error) {
  if (error instanceof TraciaError) {
    if (error.code === TraciaErrorCode.NOT_FOUND) {
      console.error('Span not found');
    } else if (error.code === TraciaErrorCode.INVALID_REQUEST) {
      console.error('Invalid evaluation value');
    }
  }
}