Task 27
八字（四柱）· CONTROL以公司的上市日為「生辰」起四柱， 讀出日主與旺衰、定喜用神，再以當前流年／流月五行是否為喜用來決定 多／空手。LLM 寫命書，引擎照樣忽略它。 刻意毫無預測力 —— 這正是重點。
⚠️ Control / placebo agent — no economic mechanism. 八字 casts the company's natal chart from its listing date and runs the identical lookahead-free backtest as the real agents — to calibrate the suite's false-positive rate. The 命書 is written by the LLM and ignored by the engine. A single reading on a hand-picked winner can look great by selection bias; only the 480-draw null distribution is honest.