Braintrust

Run fh add braintrust to install the current SDK and generate a managed, redacted observer plus its contract test. Attach stable job/agent/session/model metadata and keep evaluation datasets separate from production session storage.

import { createObservabilityObserver } from '@fabric-harness/sdk';
import { initLogger } from 'braintrust';

const logger = initLogger({ projectName: 'fabric-harness' });

const onEvent = createObservabilityObserver({
  integration: 'braintrust',
  correlation: { agentId: 'support', jobId: runId, submissionId, tenantId },
  send: (record) => logger.log({ input: record.event, metadata: record.correlation }),
});

const agent = await init({ onEvent });

Prompt, output, tool, and customer content capture must be explicitly enabled and redacted. Keep the Braintrust API key host-side and flush the client during process shutdown.

The default record contains event identity and correlation only. Set captureData: true only after reviewing the recursive key/secret redaction policy. A runnable fixture is in examples/with-observability.