This star map is driven by an AI assistant over HTTP — you never inject JavaScript and never compute astronomy yourself; the app does it. Point the view by name with look: sun moon mercury venus mars jupiter saturn or any zodiac sign. Every view is a shareable URL hash — examples (absolute): https://zodiac-sky.pages.dev/#look=jupiter and https://zodiac-sky.pages.dev/#look=sun&sun=1&t=2026-08-12T18:00Z&…. Hash keys: look, t (ISO Z), m (celestial|local), v (lon,lat,az,alt,scale), pll (lat,lon), pn, hz (1|0), sun (1|0), rv (1|0), nt, nll, np. To drive a session a user watches, use the relay at https://zodiac-sky-session-production.up.railway.app: starting one needs POST /new (a GET won't start it); then drive with the same keys via GET or POST /s/<code>/apply and read GET /s/<code>/state (treat its scene as truth, not your last command). Full guide: /DRIVING.md and /llms.txt.