Bonus 1: Amazon Bedrock & GenAI cho backend developer

import { BedrockRuntimeClient, ConverseCommand } from "@aws-sdk/client-bedrock-runtime";

const bedrock = new BedrockRuntimeClient({ region: "us-east-1" });

async function askAI(question: string) {
  const response = await bedrock.send(new ConverseCommand({
    modelId: "anthropic.claude-sonnet-4-20250514",
    messages: [{ role: "user", content: [{ text: question }] }],
    inferenceConfig: { maxTokens: 2048, temperature: 0.3 },
  }));
  return response.output?.message?.content?.[0]?.text;
}

| Model | Mạnh về | Cost |
|-------|---------|------|
| Claude Sonnet 4.6 | Code, reasoning, analysis | $$ |
| Claude Haiku 4.5 | Nhanh, rẻ, chat đơn giản | $ |
| Llama 4 Maverick | Open-source alternative | $ |
| Amazon Nova Pro | General purpose, cost-effective | $ |

### Knowledge Base (RAG): AI trả lời từ document

```bash
aws bedrock-agent create-knowledge-base --name myapp-docs \
  --role-arn $ROLE_ARN \
  --knowledge-base-configuration '{"type":"VECTOR","vectorKnowledgeBaseConfiguration":{"embeddingModelArn":"arn:aws:bedrock:us-east-1::foundation-model/amazon.titan-embed-text-v2"}}' \
  --storage-configuration '{"type":"OPENSEARCH_SERVERLESS","opensearchServerlessConfiguration":{"collectionArn":"arn:aws:aoss:us-east-1:123456789012:collection/abc123","vectorIndexName":"myapp-index","fieldMapping":{"metadataField":"metadata","textField":"text"}}}'

### Agent: AI tự gọi Lambda

```typescript
// Lambda action group → Agent tự động gọi để thực hiện action
export const handler = async (event: any) => {
  if (event.function === "createTask") {
    const result = await createTask(event.parameters[0].value);
    return { functionResponse: { responseBody: { TASK: { body: JSON.stringify(result) } } } };
  }
};
// User: "Tạo task 'Deploy AWS series'" → Agent extract params → gọi Lambda → return kết quả

### Guardrails: kiểm soát output

```bash
aws bedrock create-guardrail --name myapp-guardrail \
  --content-policy '{"filters":[{"type":"SEXUAL","inputStrength":"HIGH","outputStrength":"HIGH"}]}' \
  --topic-policy '{"topics":[{"name":"InvestmentAdvice","definition":"Financial investment recommendations"}]}'

Bài sau: [Bonus 2: Tổng kết — AWS skill map & certification](/posts/aws/44-tong-ket-aws-skill-map-certification/)