Function settleModelStepOutcome

packages/runtime/src/model-adapter.ts:526–575

(evidence: ModelStepSettlementEvidence)

}

export function settleModelStepOutcome(evidence: ModelStepSettlementEvidence): ModelStepOutcome {
  const { aborted, failure, sawFinish, finishReason, usage, request } = evidence;
  if (aborted || failure?.kind === 'abort') {
    return failedStepOutcome(
      'aborted',
      failure ?? normalizeModelFailure(Object.assign(new Error('aborted'), { name: 'AbortError' })),
      request,
      usage,
    );
  }
  if (failure) {
    return failedStepOutcome(
      failure.retryable ? 'retryable-failure' : 'terminal-failure',
      failure,
      request,
      usage,
    );
  }
  if (!sawFinish || finishReason === 'other' || finishReason === 'unknown') {
    return failedStepOutcome(
      'truncated',
      modelStepFailure(
        'provider_unavailable',
        `Provider stream ended without finishing (${finishReason})`,
      ),
      request,
      usage,
    );
  }
  if (finishReason === 'content-filter' || finishReason === 'error') {
    return failedStepOutcome(
      'terminal-failure',
      modelStepFailure(
        finishReason === 'content-filter' ? 'unknown' : 'provider_unavailable',
        finishReason === 'content-filter'
          ? 'Provider stopped the stream on a content filter'
          : 'Provider stopped the stream with an error',
      ),
      request,
      usage,
    );
  }
  return {
    kind: 'completed',
    finishReason,
    ...(usage ? { usage } : {}),
    request,
    continuation: 'none',
  };
}

function modelStepFailure(kind: ModelFailureKind, message: string): ModelFailure {
  return { type: 'model_failure', kind, message, retryable: false };