- head -3 → head -10 in check() to show full error messages - Group 16: 100KB instead of 250KB to avoid argv overflow - Batch 11+, dupID: add pattern "Maximum" and "Two.or.more" - QueueNotFound: add pattern "specified" - ChangeVisibility: fix pattern for "in flight" vs "not.in" - 3 FAILs remain: AWS client-side validation (VT<0), WaitTime>20, no server-side validation