Internal module guide. This module is now part of @astrology/vedic; use the public package README for application setup.

transit module

Gochara (Vedic transits counted from the natal Moon sign), vedha, Sade Sati and solved transit windows. Public imports use the package root. See the package specification and task plan (V-09, V-10).

Run pnpm --filter @astrology/vedic build, check, and test after building dependencies (pnpm build:vedic builds all).

Snapshot mode

evaluateGochara(reference, movingSnapshot, rules, identity) admits the immutable reference (sidereal, Moon sign present, identical profile, rulebook hash and Binder engine — otherwise REFERENCE_VERSION_MISMATCH) and places each transiting body by Binder sign id from the natal Moon. Lagna houses are informational. Vedha keeps base and effective verdicts plus the obstructing body. Bindus are omitted unless requested and read from a supplied BAV view (null when unsupported).

Window mode

scanVedicTransits checks window, step and body limits before any read, samples a bounded grid through ProbePort.series, then bisects every sign change to the tolerance. A change in the sign of speed brackets stations and are subdivided so short re-entries are found. Retrograde re-entries are separate segments and Sade Sati phases; clipped first/last segments carry startedBeforeWindow / continuesAfterWindow. Gochara verdict and vedha tables come from the rulebook; PARASHARI_GOCHARA_RULES ships the Phaladeepika ch. 26 tables (Rahu and Ketu follow Saturn, Sun–Saturn and Moon–Mercury exempt).