I Scanned 95 Days of My Claude Code Logs and Found Anthropic''s Second Silent Cache TTL Regression

The community is angry about Anthropic''s March 6 silent TTL change, but billing statements aren''t enough proof. I scanned 95 days of my own Claude Code native logs, precisely reproduced the March 6 regression, and uncovered a second wave starting April 9 — sub-agents 100% downgraded to 5m TTL, never publicly reported.