Write today's daily summary to memory/YYYY-MM-DD.md (use today's date).

Read recent conversation history and session logs to determine what happened today.

Include:
1. **Conversations** — key topics discussed with the user today
2. **Actions Taken** — tasks completed, files changed, emails sent, calendar events created
3. **Decisions** — important choices made and their reasoning
4. **Pending** — open items or follow-ups for tomorrow
5. **Lessons** — anything learned that future sessions should know

If nothing happened today (no conversations, no heartbeat activity), write nothing and exit silently.

After writing the daily summary, review the last 7 days of memory/ files and update MEMORY.md if any patterns, recurring topics, or important long-term context should be captured. Remove outdated info from MEMORY.md that's no longer relevant.