# Change: Copy attendees to summary frontmatter

## Why
The summary note should retain the final attendee list from the meeting note so the generated summary artifact can be filtered and reviewed without opening the meeting note.

## What Changes
- When the summary agent writes a summary note, copy attendees from the current meeting note into summary frontmatter.
- If the summary note already has an `attendees` frontmatter property, preserve that existing value.

## Impact
- Updates summary artifact frontmatter rendering.
- Adds focused summary tool tests.