Decision playbooks for coding agents — 给 coding agent 的开发全链路决策手册。每个 SDLC 阶段一份选型矩阵：该装什么、用哪套设计系统、走 SDD 还是 TDD。
sdlc-playbook is a Claude Code agent skill that decision playbooks for coding agents — 给 coding agent 的开发全链路决策手册。每个 SDLC 阶段一份选型矩阵：该装什么、用哪套设计系统、走 SDD 还是 TDD。.
npx skills add xazaj/sdlc-playbook读取决策矩阵，针对用户手上这个界面给出一个建议。
决策矩阵： ~/.sdlc/stages/20-design/DECIDE.md（~ 为当前用户家目录）
~/.sdlc/bin/check-update.sh。它平时静默，只在知识库落后于远端时输出一行 —— 有输出就转告用户，然后继续。已节流，不会每次都发网络请求。本技能只管选方案。选定之后的具体视觉实现，交给 frontend-design 一类的实现技能。
不要把 DECIDE.md 整篇复述出来。
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