bragboy/horoscope — reverse-engineered prompt

Build me a small Ruby horoscope library that can calculate a Vedic birth chart from someone’s birth date and time, time zone, latitude, and longitude.

I want to be able to create a horoscope object, run a compute method, and get back the house positions for the ascendant and planets like Sun, Moon, Mars, Mercury, Jupiter, Venus, Saturn, Rahu, and Ketu. It should also be able to generate a simple horoscope chart image or return an HTML version that I can embed on a web page.

Please include a clean gem style setup, basic usage examples, and tests for the main calculation flow. Keep the public API simple, something like passing a Time object plus zone, lat, and lon. If you need to check current Ruby gem conventions or astrology calculation references, look them up online.