How to Detect Prompt Injection

const result = await vettly.check({
  content: userPrompt,
  contentType: 'text',
  policyId: 'prompt-injection',
});

if (result.action === 'block') {
  return { error: 'Prompt rejected', reasons: result.categories };
}

const completion = await llm.complete(userPrompt);

const safety = await vettly.check({
  content: completion,
  contentType: 'text',
  policyId: 'llm-output',
});

{
  "flagged": true,
  "action": "block",
  "categories": {
    "harassment": 0.93,
    "hate": 0.02
  },
  "policy": "default",
  "latency_ms": 142
}