- Changed from database timestamps (7 days) to git log analysis (24 hours) - Git log is fast (~24ms) and reflects actual JSONL changes - Shows commits, total changes, created/closed/reopened/updated counts - Updated tests to verify git-based activity tracking - Removed misleading database-based getRecentActivity function Amp-Thread-ID: https://ampcode.com/threads/T-dc29c5ad-ff33-401a-9546-4d5ca1d8421b Co-authored-by: Amp <amp@ampcode.com>