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+# Logging configuration guide
+
+This guide describes how to customise log output for Base node components.
+
+## Log levels
+
+- `error` – show only errors
+- `warn` – warnings and errors
+- `info` – default verbosity
+- `debug` – verbose logs for debugging
+
+Set environment variables to adjust levels:
+
+```bash
+LOG_LEVEL=debug
+OP_NODE_LOG_LEVEL=info