summary

Summarize the alto.index data source: $ARGUMENTS

Valid sources: notes, reminders, contacts, calendar, messages, granola, voice-memos, safari-bookmarks, safari-history

Steps:

1. Check if ~/Documents/alto-index/$ARGUMENTS/ exists
2. If it exists, count the files and read the CLAUDE.md if present
3. Provide a summary:
   • total number of items
   • folder/list breakdown (for notes and reminders)
   • date range of content
   • notable items or patterns

If $ARGUMENTS is empty or invalid, list the available data sources with file counts.

Keep the summary concise - a few bullets per source, not a full dump.