A and B each get their own colour, shown on the side cards, the column heads and every
text line. Prompts list the tags only A has and only B has (each once) instead of
removed/added; long texts take one line per side with the differing part marked; values
wrap whole instead of ending in an ellipsis.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>