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Analyzes code changes, detects documentation drift, and evaluates change impact scope. Use when reviewing diffs, checking doc sync, or running pre-commit analysis. Automatically triggered after design-level changes or refactoring.
用 Codex 或 Claude 帮你安装 复制这段 Prompt，粘贴到 Codex、Claude 或其他助手里，让它检查 Skill 页面并帮你完成安装。
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| name | analyzing-changes |
| description | Analyzes code changes, detects documentation drift, and evaluates change impact scope. Use when reviewing diffs, checking doc sync, or running pre-commit analysis. Automatically triggered after design-level changes or refactoring. |
| compatibility | node>=18 |
| user-invocable | false |
| allowed-tools | Bash, Read, Grep |
| argument-hint | ["--mode working|staged|committed"] |
看清「改了什么、影响哪里、文档是否跟上」——是变更的体检，不是审查替代品。
| 场景 | 跑 | 判据 |
|---|---|---|
| 提交前（任何代码改动） | ✅ | 默认门禁 |
| 重构完成 | ✅ | 评估辐射面 |
| 设计级改动 | ✅ | DESIGN.md 是否同步 |
| PR review | ✅ | 替代手工 diff 计数 |
| 跨模块大改 | ✅ | 看依赖图是否成环 |
| 紧急 hotfix | ⚠ | 跑，但允许文档同步延后到稳定后 |
| 模式 | 时机 | 用途 |
|---|---|---|
working (默认) | 写代码过程中 | 自检，看「我现在的工作面有哪些待整理」 |
staged | git add 后、commit 前 | 提交闸，看「这一 commit 的合理性」 |
committed | commit 完成后 | review，看「上一段历史改了哪些范围」 |
| 警告 | 触发 | 处置 |
|---|---|---|
| 代码 >50 行 而 DESIGN.md 未更新 | 设计层面变化未留痕 | 补 DESIGN.md「改了什么/为何」段 |
| 代码 >30 行 而无测试更新 | 测试覆盖滞后 | 补单测/集成测；或在 PR 注明「该路径已有 E2E 覆盖」 |
| 新增文件而 README.md 未更新 | 用户视角文档滞后 | 补模块入口说明 |
| 配置变更未记录 | 部署可能踩坑 | CHANGELOG / DESIGN 留迁移说明 |
| 删除文件 | 引用可能未清理 | 全仓 grep 文件名/导出符号 |
工具产出三类信号：
拆 PR 的判据（基于 commit 角度）：
- 跨 ≥3 模块且无统一主题 → 拆
- 单 commit >500 行非生成代码 → 拆
- 一次同时改架构 + 实现 + 文档 → 通常合理（同主题）
node scripts/change_analyzer.js # working（默认）
node scripts/change_analyzer.js --mode staged # 暂存区
node scripts/change_analyzer.js --mode committed # 已提交
node scripts/change_analyzer.js -v # 详细
node scripts/change_analyzer.js --json # CI 用
工具给信号，人下结论。先读受影响模块 README/DESIGN，确认：
设计级改动须于 DESIGN.md 留痕：改了什么、为何改、影响何处。三段缺一不可。