ac colors orange teal sets your handle's letter colours through the existing /api/handle-colors (your own handle only, via your AC token): names or hex, cycling across the letters. The open backend's toolbox now names ac (whoami / publish / colors) and the fast tools — rg, fd, jq — so a model asked for this reaches for them instead of grepping the repo. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>