Petru Paler
5ec3aba8b3
Add pino-based logger module for production observability: - JSON output to stdout for log aggregators (Loki, ELK) - Configurable via LOG_LEVEL environment variable (defaults to "info") - Log levels: error, warn, info, debug - Error objects serialized with type, message, and stack trace - Child logger support for bound context - ISO 8601 timestamps in all log entries Test coverage: 16 tests covering JSON format, log levels, error serialization, and child loggers. Total tests now: 553 passing across 31 test files. Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
27 lines
783 B
TypeScript
27 lines
783 B
TypeScript
// ABOUTME: Structured logging module using pino for JSON output to stdout.
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// ABOUTME: Configurable via LOG_LEVEL env var, outputs parseable logs for aggregators.
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import pino from "pino";
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/**
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* PhaseFlow logger configured per observability spec.
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*
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* Log levels: error, warn, info, debug
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* Output: JSON to stdout
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* Configuration: LOG_LEVEL env var (defaults to "info")
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*
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* Usage:
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* logger.info({ userId: "123" }, "User logged in");
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* logger.error({ err: error, userId: "123" }, "Operation failed");
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*/
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export const logger = pino({
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level: process.env.LOG_LEVEL || "info",
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formatters: {
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level: (label) => ({ level: label }),
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},
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timestamp: () => `,"timestamp":"${new Date().toISOString()}"`,
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messageKey: "message",
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});
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export type Logger = typeof logger;
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