Deterministic I Ching (六爻 / Liù Yáo) tools — classical rules computed by an engine, never guessed by AI.

确定性六爻工具：排盘按经典法度由引擎计算，AI 只做表达，不自算卦理。

• 🌐 yaomancy.com — 六爻金钱卦占卜 Web 应用，面向海外华人
• ⚙️ liuyao-engine — open-source hexagram engine (Apache-2.0): najia, six relations, six spirits, strength. No AI, no network; tables cross-validated against independent implementations.

装卦遵《卜筮正宗》、断法遵《增删卜易》。