follow stab55_20, 1. reconcile c128 large capability status; 2. distinguish extended C=4 full-double success from formal cold C=1 limitation; 3. update testing skill. [opencode].
follow stab55_20, 1. reconcile c128 large capability status; 2. distinguish extended C=4 full-double success from formal cold C=1 limitation; 3. update testing skill. [opencode].