Validation status
Specific evidence, no blanket accuracy claim
ChartLumen does not claim that astrology is scientifically predictive, nor that every supported output has completed a full professional reference-suite audit.
Automated release gates
Deterministic tests cover core planetary output, angle geometry, unknown-time omission, citation allowlists, privacy boundaries, route inventory, canonical host behavior, and safety redirects.
Reference scope
The Lahiri-aligned ayanamsa curve is checked against Swiss Ephemeris 2.10.03 across 1800–2200. The Ascendant and Midheaven are checked against independent horizon geometry for births from Reykjavik to Sydney: the calculated Ascendant sits on the rising eastern horizon and the Midheaven on the upper meridian, both within 0.01°. That is still limited validation, not a claim of equivalence across house systems, traditions, or other software.
Current limitation
Vedic mode remains a preview while a broader independent fixture suite and domain review are completed. Current method status: limited-validation.
Read the calculation methodology or use the corrections process for a reproducible discrepancy.