I built a zero-dependency sky engine in TypeScript, verified to 4.6 arcseconds

Today I shipped v0.1.0 of grahan, an MIT-licensed TypeScript library that computes Sun/Moon positions, sunrise/sunset, moon phases, and the Vedic panchang (tithi, nakshatra, yoga, karana, Rahu Kaal). Zero runtime dependencies. Runs in Node 18+, browsers, and edge runtimes.

npm install @grahan/vedic

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import { panchang } from '@grahan/vedic';