@agntk/logger

Zero-dependency structured logging with namespace filtering, file output, and SSE support.

Install

npm install @agntk/logger

Quick Start

import { createLogger } from '@agntk/logger';

const log = createLogger('@myapp:feature');
log.info('Request processed', { userId: '123', durationMs: 45 });
log.warn('Rate limit approaching');
log.error('Failed to connect', { error: err.message });
log.debug('Cache hit', { key: 'user:123' });

Namespace Filtering

DEBUG=@agntk/core:* node app.js
DEBUG=@agntk/*,-@agntk/core:verbose node app.js

Transports

import { createConsoleTransport, createFileTransport, createSSETransport, addTransport } from '@agntk/logger';

addTransport(createConsoleTransport({ colorize: true }));
addTransport(createFileTransport({ path: './logs/agent.log' }));

Features

• Zero dependencies — Lightweight and fast
• Namespace filtering — Enable/disable loggers by pattern
• Transports — Console, file, and SSE output
• Formatters — Pretty, JSON, and SSE formats
• Timing — Built-in duration helpers

Documentation

See the main repository for full documentation.

License

MIT