Live end-to-end test surfaced two bugs in youtube tagging: - `--replace-in-metadata artist .* NAME` matched twice and doubled the artist tag (e.g. "SLVMLORDSLVMLORD"). Anchor with ^.*$ to match once. - Use only the first artist when several are present (SLVMLORD, not "SLVMLORD, Travis Bradley, ...") for both the embedded tag and the spoken/echoed API messages. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>