Logs remember what developers forget.
Useful events preserve context long after the deployment conversation has ended.
Interpretation
During an incident, memory is incomplete and assumptions are loud. Structured logs can preserve decisions, identifiers, and outcomes at the moment they occur. Log events that explain state transitions, not a flood of prose, and handle sensitive data as carefully as production data.
Practice
- Use structured fields with stable names.
- Log state changes and decisions with correlation context.
- Redact secrets and personal data by default.
Anti-pattern
Logging “something failed” without operation, identifier, or cause.