# Compatibility Notes - Moira 6.11.1 Python 3.10 through 3.14, dependencies, native bindings and existing REST request/response shapes remain unchanged from 6.11.0. ASC/DSC coordinates and their sampled latitude domains intentionally change where the old horizon geometry was wrong. Lunar corrections can restore previously omitted samples as well as remove impossible samples. MC/IC longitude conventions and the configured latitude grid are unchanged. Refraction is still opt-in at the engine boundary. The website's existing refraction-on request retains its declared -0.5667 degree geometric centre horizon. The unrefracted `90 - abs(declination)` limit must not be applied unchanged to that refracted product or to a finite-distance lunar direction. The existing sampling product remains a list of vertices. This patch does not introduce curve-cap connectors, a different map projection, or an exact endpoint materialization contract.