一站奇門遁甲：JavaScript calendar adapter, plate implementation, interface and explanatory wording by 一站.
Calendar: lunar-javascript 1.7.7 (existing vendor/lunar-LICENSE.txt).

Conventions and differential reference: qimen-rs by SpenserCai.
https://github.com/SpenserCai/qimen-rs
MIT license reproduced in qimen-reference-LICENSE.txt.
Independent implementation cross-checked against its published example and plate tests; public reference fixtures retained only in development checks.

Traditional fixed tables are cultural/public-domain mathematical conventions.
《箋元遁甲句解煙波釣叟歌》:
https://www.shidianguji.com/zh/book/HY3334/chapter/1l0hek0lshgy7
Modern explanatory text on this page is original. No remote AI inference or chart-generation service is called.