Show the user their brain's sync history.
Steps
- Read the merge log:
``bash cat ~/.claude/brain-repo/meta/merge-log.json 2>/dev/null ``
- If the file doesn't exist or is empty, tell the user: "No sync history yet."
- Otherwise, display the most recent entries in reverse chronological order. Default to 20 entries, but if $ARGUMENTS is a number, use that instead.
Format each entry as: `` [timestamp] machine_name (action): summary ``
Example: `` [2026-03-03T12:05:00Z] work-laptop (pull+merge): Merged 3 machine snapshots [2026-03-03T11:00:00Z] home-desktop (push): Exported brain snapshot [2026-03-02T09:30:00Z] work-laptop (evolve): Promoted 2 patterns to CLAUDE.md ``