SLF4J - Simple Logging Facade for Java. Standard logging API that abstracts underlying
implementation (Logback, Log4j2). Provides parameterized logging and MDC support.
USE WHEN: user mentions "slf4j", "java logging api", "parameterized logging",
asks about "how to log in Java", "logger facade", "MDC in java", "logging best practices java"
DO NOT USE FOR: Logback configuration - use `logback` instead, Log4j2 configuration - use Log4j2 skill,
Node.js logging - use `winston` or `pino` instead, Python logging - use `python-logging` instead