The engine
Positions computed in India. Sūrya within ~0.1 arc-minutes (p95), Candra within ~1 arc-minute of NASA/JPL Horizons. No foreign runtime. Rāṣṭrīya Pañcāṅga calibrated. Methodology published — Zenodo DOI 10.5281/zenodo.20024273. The full benchmark is on /accuracy.