golem-logging-scala

Import golem.wasi.Logging and call methods like Logging.info, Logging.debug, or Logging.error directly with no setup required. The Logging object comes from golem-scala-core, which is already included in the project dependencies.

The Logging object supports six levels: trace, debug, info, warn, error, and critical. Each method maps directly to the corresponding level in the wasi:logging/logging WASI interface.

Yes, println and System.err.println work and are captured by Golem, appearing in golem agent stream output. However, they lack log levels and context, so Logging methods are preferred for structured, filterable output.

Run golem agent stream '<agent-id>' to watch live agent output, or use golem agent invoke with the agent ID and method to see logs during a specific invocation. All log entries are recorded in the agent's oplog.

Logging is treated as a side effect, so during replay after a crash recovery, log calls from replayed operations are skipped. This prevents duplicate log entries when the agent re-executes its history.