# Context engineering with memory notes

Store long term memory notes and state for multi-session workflows.

- Date: Jun 25, 2025
- Reading time: 17 min
- Level: Intermediate
- Tags: Agents SDK, Memory, State

## Takeaways
- Store short term state separately from long term memory.
- Attach TTLs and privacy labels to memory notes.
- Summarize memory before reuse.

## Define a state model

Create a schema for session state and keep it small and explicit.

## Memory notes

Store long term notes with a source, timestamp, and confidence.

## Privacy and retention

Expire memory notes and prevent sensitive data from persisting.