Como usar
- Copie o comando e verifique o pacote antes de instalar no seu ambiente de agente.
- Consulte no original as ferramentas, credenciais e ambientes necessários.
- Descreva os dados de entrada e a entrega esperada; confira a saída com as fontes.
npx skills add https://github.com/secondsky/claude-skills --skill logging-best-practicesAntes de começar
- A instalação não inclui assinatura de modelo, franquia API ou acesso aos seus arquivos.
- Estrelas e instalações indicam atividade, não um teste independente de qualidade ou segurança.
Documento original do Skill
Renderizado do repositório de origem, preservando títulos, exemplos, código, tabelas, links e imagens.
Logging Best Practices
Implement secure, structured logging with proper levels and context.
Log Levels
| Level | Use For | Production |
|---|---|---|
| DEBUG | Detailed debugging | Off |
| INFO | Normal operations | On |
| WARN | Potential issues | On |
| ERROR | Errors with recovery | On |
| FATAL | Critical failures | On |
Structured Logging (Winston)
javascript
const winston = require('winston');
const logger = winston.createLogger({
level: process.env.LOG_LEVEL || 'info',
format: winston.format.combine(
winston.format.timestamp(),
winston.format.json()
),
defaultMeta: { service: 'api-service' },
transports: [
new winston.transports.Console(),
new winston.transports.File({ filename: 'error.log', level: 'error' })
]
});
// Usage
logger.info('User logged in', { userId: '123', ip: '192.168.1.1' });
logger.error('Payment failed', { error: err.message, orderId: '456' });Request Context
javascript
const { AsyncLocalStorage } = require('async_hooks');
const storage = new AsyncLocalStorage();
app.use((req, res, next) => {
const context = {
requestId: req.headers['x-request-id'] || uuid(),
userId: req.user?.id
};
storage.run(context, next);
});
function log(level, message, meta = {}) {
const context = storage.getStore() || {};
logger.log(level, message, { ...context, ...meta });
}PII Sanitization
javascript
const sensitiveFields = ['password', 'ssn', 'creditCard', 'token'];
function sanitize(obj) {
const sanitized = { ...obj };
for (const field of sensitiveFields) {
if (sanitized[field]) sanitized[field] = '[REDACTED]';
}
if (sanitized.email) {
sanitized.email = sanitized.email.replace(/(.{2}).*@/, '$1***@');
}
return sanitized;
}Best Practices
- Use structured JSON format
- Include correlation IDs across services
- Sanitize all PII before logging
- Use async logging for performance
- Implement log rotation
- Never log at DEBUG in production
Additional Implementations
See references/advanced-logging.md for:
- Python structlog setup
- Go zap high-performance logging
- ELK Stack integration
- AWS CloudWatch configuration
- OpenTelemetry tracing
Never Do
- Log passwords or tokens
- Use console.log in production
- Log inside tight loops
- Include stack traces for client errors
