How I Built a Multi-System Astrology Bot in Python (And What Meta Banned Me For)
Every horoscope app reduces you to 1 of 12 sun signs. Real astrologers don't work like that — they cross-reference Western astrology, Vedic (Jyotish), Chinese Ba Zi, numerology, Human Design, and more. So I built a Telegram bot that does the same: one daily forecast synthesized from 13 systems, based on your full birth date.
It's been live for ~1 month. Small still — 83 users — but I want to share the parts that actually taught me something.
The Architecture: Why Combining 13 Systems Is a Data Problem, Not an Astrology Problem
Each system is a separate calculator. Western astrology needs ecliptic longitudes (I use Skyfield + NASA ephemeris). Vedic needs tithi (lunar day, 1-30) and nakshatra (27 lunar mansions). Ba Zi needs solar-term boundaries to assign the day-pillar element. Numerology needs digit-reductions with master-number exceptions (11, 22, 33 don't reduce before arithmetic).
Each one is finicky in its...
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