问题拆分
A feature list hides the most important unknown: whether the two systems feel coherent during play instead of only in a design document.
记录预期结果和第一次失败的位置，并确保每次修改都可以撤销。
实践步骤
Write one sentence for the player action, one sentence for the imported rule, and one sentence for failure. Remove every feature that does not change that test.
使用原创占位素材和离线测试环境，开始前先备份。
验证与记录
Ask a fresh tester to complete the slice without explaining the implementation. Their confusion reveals missing feedback faster than another architecture diagram.
记录版本、步骤、结果和恢复方式，形成短小的现场笔记。