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electron-debug

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通过 CDP（Chrome DevTools Protocol）将 Playwright 连接到 LiveAutoRecord 的 Electron 应用， 实现抓取 console 日志、注入 JS 执行、截图、DOM 交互等自动化调试能力。 适用场景：调试 Electron 渲染进程问题、捕获 console 输出、自动截图、 测试运行中 Electron 窗口的 UI 行为，或任何需要对 Electron 窗口进行浏览器自动化的任务。

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How to use this skill

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Source SKILL.md: https://github.com/WhiteMinds/LiveAutoRecord/blob/HEAD/.claude/skills/electron-debug/electron-debug/SKILL.md

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First, summarize what it does, its dependencies, license status if identifiable, and any risks. Show the exact files you propose to add under .agents/skills/electron-debug/. Do not write files or run scripts until I approve.

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Electron CDP 调试

通过 Chrome DevTools Protocol 将 Playwright 连接到运行中的 Electron 应用进行调试。

前置条件

  • 已安装 Playwright（通过 playwright-skill 或全局安装均可）
  • 9222 端口未被其他进程占用

工作流程

1. 启用 CDP

node .claude/skills/electron-debug/electron-debug/scripts/enable-cdp.cjs enable

自动在 apps/electron/src/index.ts 中插入 app.commandLine.appendSwitch('remote-debugging-port', '9222')。修改有标记，可完全还原。

2. 启动应用

pnpm app:dev

等待输出中出现 DevTools listening on ws://127.0.0.1:9222/...。看到 listening at http://localhost:8085 表示 HTTP 服务也已就绪。

3. 连接并抓取

从 playwright-skill 目录运行脚本（以便正确解析 require('playwright')）：

cd <playwright-skill-dir> && node <project>/.claude/skills/electron-debug/electron-debug/scripts/cdp-connect.cjs \
  --duration 5000 \
  --screenshot /tmp/electron.png \
  --eval "console.log('hello from Playwright')"

参数说明：

  • --port <N> — CDP 端口（默认 9222）
  • --duration <ms> — 监听 console 消息的时长（默认 5000）
  • --screenshot <path> — 保存截图的路径
  • --eval <code> — 在渲染进程中执行的 JS 代码

4. 清理

node .claude/skills/electron-debug/electron-debug/scripts/enable-cdp.cjs disable

然后停止 Electron 进程（Windows: taskkill //F //IM electron.exe，Unix: pkill -f electron）。

重要： 调试完成后务必还原 CDP 开关，避免将其提交到仓库。

自定义 Playwright 脚本

对于脚本未覆盖的场景，可编写自定义 Playwright 脚本。核心模式：

const { chromium } = require('playwright')

const res = await fetch('http://localhost:9222/json/version')
const { webSocketDebuggerUrl } = await res.json()
const browser = await chromium.connectOverCDP(webSocketDebuggerUrl)

const pages = browser.contexts()[0].pages()
const page = pages.find(p => p.url().includes('localhost:5173'))

// ... 自定义操作 ...

browser.disconnect() // 不要用 browser.close()，否则会关闭 Electron

执行方式：cd <playwright-skill-dir> && node run.js /tmp/my-script.js

常见问题

  • connectOverCDP 返回 "status 400" — 必须用 /json/version 返回的 ws:// URL，不能直接传 http://localhost:9222
  • 找不到页面 — 应用可能还没加载完，等待 HTTP 服务日志行出现
  • 端口被占用 — 改用 --port 9223，enable-cdp.cjs 也要传相同端口

更多 CDP 连接细节参见 references/cdp-notes.md。