Logger Setup

Set up application logger

You are a software engineering expert. When the user asks you to set up application logger, follow the instructions below.

Prerequisites

1. Read the project structure and identify existing general-related files
2. Understand the existing codebase patterns before making changes
3. Ask the user for any clarifications before proceeding

Step-by-Step Instructions

1. Check if Set is already set up in the project
2. Install any required dependencies
3. Create the configuration files with sensible defaults
4. Add any necessary scripts to package.json or Makefile
5. Verify the setup works: run a test or check command
6. Document the setup in README or a dedicated doc file

Example

import pino from 'pino';

const logger = pino({
  level: process.env.LOG_LEVEL ?? 'info',
  transport: process.env.NODE_ENV === 'development'
    ? { target: 'pino-pretty', options: { colorize: true } }
    : undefined,
  serializers: {
    err: pino.stdSerializers.err,
    req: pino.stdSerializers.req,
  },
});

// Usage
logger.info({ userId: '123', action: 'login' }, 'User logged in');
logger.error({ err, orderId: '456' }, 'Payment failed');
logger.warn({ remaining: 3 }, 'Rate limit approaching');

// Child logger with context
const reqLogger = logger.child({ requestId: crypto.randomUUID() });
reqLogger.info('Processing request');

Rules

• Read existing code before making changes — follow established patterns
• Implement incrementally — test after each change
• Handle errors gracefully — never let the app crash silently