Best Practices for App-Level logs in MongoDB

Keep logs structured — every log is a typed event

• Use an event_type field with enums like:
  • import_created
  • import_processed
  • memory_ingested
  • auto_tagged
  • error

Keep logs tied to entities

• Add references:
  • user_id
  • import_id
  • memory_id
  • prompt_id

Avoid logging excessively granular steps

• No need to log “normalized field X” unless debugging
• Focus on discrete lifecycle transitions

Keep them immutable

• Logs should be write-once and never edited