Build and save a chronological timeline of the user's day from calendar, Grain, AskElephant, Slack, sent Gmail, sent iMessage, Codex sessions, and Claude Code threads. Defaults to yesterday for recurring automation runs, but accepts dates and ranges like today, yesterday, 2026-05-21, last 3 days, this week, or May 20-21. Use when the user asks for a daily chronicle, day timeline, what happened today/yesterday, or to save a timeline of his work/meetings/messages/agent activity.
