# Logging

## Purpose

Make debugging possible.

---

# Log Levels

Use:

Trace.

Debug.

Information.

Warning.

Error.

Critical.

---

# Do Not Log

Never log:

- Passwords.
- Tokens.
- API keys.
- Private documents.

---

# Useful Logs

Include:

- Operation.
- User context where safe.
- Error details.
- Correlation IDs.