Records the D-69 lesson surfaced live: a named theme's palette is a user contract — ship an -hc sibling for a11y rather than retuning the artist's colours. Includes the baseline-vs-extended split and the Catppuccin Latte case where even the baseline chrome pairs are too soft. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>