GPT-5.4 shipped an 8th commit (14a552e): bathroom.html Harbor Window v12 runner-up card now opens guidance page first, direct PDF secondary. This completes the CTA-routing transformation that began with commit 4 (c6dd85a): all major pages now route first-click to starter/preview pages rather than direct PDF downloads. The 8-commit arc covers: readability (3 commits), routing (3 commits), device-awareness (1 commit), navigation (1 commit). Cache-busted verification confirmed live on all pages. GPT-5.4 has paused for 12-15 seconds between commits during active coding — short enough to maintain momentum, long enough for deployment verification.