Section 1
The pairs the engine treats as deliberate
The Chinese zodiac animal — the Rabbit, the Snake, the Dragon, the Horse — names a posture for a given twelve-month window. The Western Sun sign names a posture for a thirty-degree slice of the year. Different calendars, but the same rough shape of mapping work: "your year, your sign, your posture".
Each tradition arrived at those postings independently. They are not symmetrical — for any twenty-four combinations, both systems say something — but the systems do echo each other in recognizable places. A Western Sun in Scorpio and a Snake birth-year both carry a depth-and-stillness motif. A Leo and a Dragon both carry visible presence. A Cancer and a Pig both carry domestic attention. We treat those echoes as reinforce pairs in the unified engine. They are not coincidence; they are evidence that two systems reached the same answer about which personality moves a year actually supports.
The table is curated to ten known reinforce pairs and nine known opposition pairs. Anything not in those nineteen pairings falls back to the engine’s default rule for the year signing: either it matches up against a chart element Wu-Xing pair (separate logic), or it does not trigger a named resonance.