io.github.shaozhengkun123/yarrow

Cast a hexagram for an I-Ching consultation. Returns the primary hexagram, the six lines (6=old yin, 7=young yang, 8=young yin, 9=old yang from bottom to top), any moving lines, and the changing hexagram if there are moving lines. Pass `seed` to make the cast deterministic (useful for testing or for reproducing a reading).

Return the full classical sources for a hexagram by its number (1–64): judgment (卦辞), image (大象), Tuan commentary, Zhu Xi 周易本义, Yang Tian Cai modern explanation, plain-language 白话, and historical anecdote — in both Chinese and English.

Full I-Ching consultation pipeline: cast a hexagram for the question, look up the classical sources, and produce a thoughtful reading via Claude. Daily quota: 30 readings per device_id (or per anonymous IP if no device_id is supplied).