- daily_art gains blurb + palette columns (idempotent migration).
- art._palette: Pillow median-cut to ~5 hex colors from the cached image (best-
effort → [] on any failure). art._blurb: a warm 2-3 sentence "what you're
looking at" note grounded in the Met catalogue (title/artist/bio/date/medium/
classification/culture/tags). Prompt leans on context/significance and the
title+tags for subject — explicitly NOT asserting literal composition (figure
counts/poses) it can't see, since the model can't view the image. Markdown
stripped from the output.
- pick_daily generates both (client optional → blurb skipped when absent); cycle
+ art CLI pass an LLM client. /api/art/today exposes blurb + palette.
- Backfilled the last 3 days on host (Veteran / Magnolia Vase / Bierstadt).
- scripts/art_blurb_palette_backfill.py for in-place backfill (no re-pick).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
