User guide / Diagnostics and logging

Bounds

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• The active file keeps at most 4 MiB, with one previous 4 MiB file beside it ending in .1.
• The owning process rotates, both while running and at startup when it inherits a full file, so a long-lived or often-restarted host cannot grow without bound.
• Before opening its own default log, an ide-mode process keeps the four newest logs of exited ide-mode processes and removes older ones with their .1 files. Logs of live processes are never pruned.
• Producers never wait for disk. Records go through a bounded queue to one background writer and are dropped rather than delaying input, rendering, protocol handling, or service events; a later record says how many were lost.
• Shutdown and panic paths flush within a bounded budget and never wait indefinitely.