Run one Better Ralph iteration: PRD-driven autonomous coding. Read prd.json, pick next story, implement it, run checks, commit, mark story passed, append progress. Uses only standard OpenClaw tools (read, write, exec, git). Triggers on: run better ralph, better ralph iteration, do one ralph story, next prd story, ralph loop.

运行一次 Better Ralph 迭代：基于 PRD 的自主编码。读取 prd.json，选择下一条用户故事，实现它，运行检查，提交代码，标记故事为已完成，并追加进度。仅使用标准 OpenClaw 工具（read、write、exec、git）。触发条件：run better ralph、better ralph iteration、do one ralph story、next prd story、ralph loop