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archive/inactive-skills/verify-on-browser/SKILL.md

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+---
+description: Control browser via Chrome DevTools Protocol - full CDP access
+---
+
+# Browser Control Skill
+
+Use the `browser` MCP server to control a browser with full CDP access. The core `cdp_send` tool can call ANY Chrome DevTools Protocol method.
+
+## Available Tools
+
+### `cdp_send` - Raw CDP Access
+Call any CDP method directly:
+```
+cdp_send(method: "Domain.method", params: {...})
+```
+
+### `screenshot` - Capture Page
+```
+screenshot(format: "png"|"jpeg", fullPage: true|false)
+```
+
+### `get_url` - Current URL
+```
+get_url()
+```
+
+### `close_browser` - Close Browser
+```
+close_browser()
+```
+
+## Common CDP Operations
+
+### Navigation
+```javascript
+// Navigate to URL
+cdp_send(method: "Page.navigate", params: { url: "https://example.com" })
+
+// Reload
+cdp_send(method: "Page.reload")
+
+// Go back/forward
+cdp_send(method: "Page.navigateToHistoryEntry", params: { entryId: 1 })
+```
+
+### DOM Manipulation
+```javascript
+// Get document root
+cdp_send(method: "DOM.getDocument")
+
+// Query selector (needs nodeId from getDocument)
+cdp_send(method: "DOM.querySelector", params: { nodeId: 1, selector: "h1" })
+
+// Get outer HTML
+cdp_send(method: "DOM.getOuterHTML", params: { nodeId: 5 })
+
+// Set attribute
+cdp_send(method: "DOM.setAttributeValue", params: { nodeId: 5, name: "class", value: "new-class" })
+```
+
+### JavaScript Execution
+```javascript
+// Evaluate expression
+cdp_send(method: "Runtime.evaluate", params: { expression: "document.title" })
+
+// Evaluate with return value
+cdp_send(method: "Runtime.evaluate", params: {
+  expression: "document.querySelectorAll('a').length",
+  returnByValue: true
+})
+
+// Call function on object
+cdp_send(method: "Runtime.callFunctionOn", params: {
+  objectId: "...",
+  functionDeclaration: "function() { return this.innerText; }"
+})
+```
+
+### Network
+```javascript
+// Enable network tracking (required first)
+cdp_send(method: "Network.enable")
+
+// Set cookies
+cdp_send(method: "Network.setCookie", params: {
+  name: "session",
+  value: "abc123",
+  domain: ".example.com"
+})
+
+// Get cookies
+cdp_send(method: "Network.getCookies")
+
+// Clear cache
+cdp_send(method: "Network.clearBrowserCache")
+
+// Set extra headers
+cdp_send(method: "Network.setExtraHTTPHeaders", params: {
+  headers: { "X-Custom": "value" }
+})
+
+// Block URLs
+cdp_send(method: "Network.setBlockedURLs", params: { urls: ["*.ads.com"] })
+```
+
+### Input Simulation
+```javascript
+// Click (dispatch mouse event)
+cdp_send(method: "Input.dispatchMouseEvent", params: {
+  type: "mousePressed",
+  x: 100,
+  y: 200,
+  button: "left",
+  clickCount: 1
+})
+
+// Type text
+cdp_send(method: "Input.insertText", params: { text: "Hello world" })
+
+// Key press
+cdp_send(method: "Input.dispatchKeyEvent", params: {
+  type: "keyDown",
+  key: "Enter"
+})
+```
+
+### Emulation
+```javascript
+// Set viewport
+cdp_send(method: "Emulation.setDeviceMetricsOverride", params: {
+  width: 375,
+  height: 812,
+  deviceScaleFactor: 3,
+  mobile: true
+})
+
+// Set geolocation
+cdp_send(method: "Emulation.setGeolocationOverride", params: {
+  latitude: 37.7749,
+  longitude: -122.4194,
+  accuracy: 100
+})
+
+// Set timezone
+cdp_send(method: "Emulation.setTimezoneOverride", params: { timezoneId: "America/New_York" })
+```
+
+### Performance & Debugging
+```javascript
+// Enable performance metrics
+cdp_send(method: "Performance.enable")
+
+// Get metrics
+cdp_send(method: "Performance.getMetrics")
+
+// Start profiler
+cdp_send(method: "Profiler.start")
+
+// Stop and get profile
+cdp_send(method: "Profiler.stop")
+
+// Enable debugger
+cdp_send(method: "Debugger.enable")
+
+// Set breakpoint
+cdp_send(method: "Debugger.setBreakpointByUrl", params: {
+  lineNumber: 10,
+  url: "https://example.com/script.js"
+})
+```
+
+### Storage
+```javascript
+// Get local storage
+cdp_send(method: "DOMStorage.getDOMStorageItems", params: {
+  storageId: { securityOrigin: "https://example.com", isLocalStorage: true }
+})
+
+// Clear storage
+cdp_send(method: "Storage.clearDataForOrigin", params: {
+  origin: "https://example.com",
+  storageTypes: "all"
+})
+```
+
+## CDP Protocol Reference
+
+For complete list of all domains and methods:
+https://chromedevtools.github.io/devtools-protocol/
+
+Common domains:
+- **Page** - Navigation, lifecycle, PDF generation
+- **DOM** - Document structure manipulation
+- **CSS** - Stylesheet manipulation
+- **Runtime** - JavaScript execution
+- **Network** - Request/response interception
+- **Input** - Keyboard/mouse simulation
+- **Emulation** - Device/viewport simulation
+- **Debugger** - JavaScript debugging
+- **Performance** - Performance metrics
+- **Storage** - localStorage, IndexedDB, cookies