## Why

The automatic summarizer and interactive agent window can encounter uncertainty, missing information, and repair conclusions that are useful to later work on the same meeting. Those observations currently depend on the active agent turn instead of being consistently preserved in the meeting's assistant context.

## What Changes

- Treat each assistant context file as meeting-specific memory shared by agents working on that meeting.
- Guide the automatic summarizer to record unexpected problems, missing information, and assumptions in assistant context.
- Guide the interactive agent window to consult assistant context when repairing a meeting or summary.
- Guide the interactive agent window to append its fixes and conclusions to assistant context for future work on that meeting.

## Capabilities

### New Capabilities

None.

### Modified Capabilities

- `meeting-summary`: Define the automatic summarizer's responsibility to persist uncertainty and problems in meeting-specific assistant context.
- `meeting-session`: Define how the interactive agent window uses and updates assistant context during meeting and summary repairs.

## Impact

- Summary-agent default instructions and their behavior tests.
- Interactive agent-window instructions and their behavior tests.
- Agent documentation describing assistant context usage.