Request: choosing what to log and what not to

## What situation should this cover? Adding logging to code — during a debug session or when building something new. ## What goes wrong without it? Two failure modes, both expensive. Too little: an incident where the logs cannot tell you what happened. Too much: cost, noise, and secrets or PII written to a log aggregator that a hundred people can read. ## Who would know this? Anyone who has been on call. Should cover: log decisions and boundaries rather than progress, include the identifiers needed to correlate, never log credentials or personal data, and the difference between a log, a metric, and a trace.