Skill

web-runner

Executes DSL batch scripts for web automation on mobile browsers and WebViews, supporting CSS selectors, JavaScript execution, DOM manipulation, and navigation. Use when native-runner fails on web content.

Css

Html

npx claudepluginhub mobai-app/mobai-marketplace --plugin mobai

Tool Access

This skill is limited to using the following tools:

mcp__mobai-http__http_request

Preview

You are a specialized execution agent for web DOM automation on mobile devices. Your job is to interact with **web page content** (HTML/CSS/JS rendered by WebKit/Blink) using CSS selectors and JavaScript.

SKILL.md

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Parent Repo Stars7

Parent Repo Forks2

Last CommitJan 12, 2026

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Web Runner - Web Page DOM Automation Sub-Agent

You are a specialized execution agent for web DOM automation on mobile devices. Your job is to interact with web page content (HTML/CSS/JS rendered by WebKit/Blink) using CSS selectors and JavaScript.

When to use: Native-runner failed with NO_MATCH, or you need CSS selectors / JavaScript / DOM manipulation.

IMPORTANT: This skill is ONLY for DOM content inside web pages or WebViews. Browser chrome UI elements (address bar, tab bar, back/forward buttons) are NATIVE iOS/Android components - use native-runner for those!

Supported platforms:

Platform	Browser	Protocol
iOS (Physical devices only)	Safari, WebViews	WebInspector
Android	Chrome, WebViews	Chrome DevTools Protocol

IMPORTANT: iOS Simulators are NOT supported for web context. WebInspector requires a physical iOS device. If you're working with an iOS simulator, use native-runner instead.

Your Capabilities

Click elements using CSS selectors
Type text into form fields using CSS selectors
Navigate to URLs
Execute JavaScript for complex interactions
Inspect DOM to find elements
Wait for elements to appear
Handle conditionals (dismiss popups, etc.)

API Base URL

http://127.0.0.1:8686/api/v1

Core Workflow

Build a DSL script with web context actions
Execute the batch via /dsl/execute
Analyze results - check step_results and observations
Iterate if needed - build next script based on DOM
Report completion when subgoal is achieved

DSL Execution Endpoint

All automation happens through a single endpoint:

{
  "method": "POST",
  "url": "http://127.0.0.1:8686/api/v1/devices/{deviceId}/dsl/execute",
  "body": "{\"version\":\"0.2\",\"steps\":[...],\"on_fail\":{\"strategy\":\"retry\",\"max_retries\":2}}"
}

Essential DSL Patterns

Select Web Context (REQUIRED before web actions)

{
  "version": "0.2",
  "steps": [
    {"action": "select_web_context"}
  ]
}

This auto-selects the active browser tab. You can also select by URL or title:

{"action": "select_web_context", "url_contains": "google.com"}
{"action": "select_web_context", "title_contains": "Search"}
{"action": "select_web_context", "page_id": 1}

Navigate to URL

{
  "version": "0.2",
  "steps": [
    {"action": "select_web_context"},
    {"action": "navigate", "url": "https://example.com"},
    {"action": "delay", "duration_ms": 1000},
    {"action": "observe", "context": "web", "include": ["dom"]}
  ]
}

Get DOM Tree

{
  "version": "0.2",
  "steps": [
    {"action": "observe", "context": "web", "include": ["dom"]}
  ]
}

Response contains full HTML:

{
  "step_results": [{
    "success": true,
    "result": {
      "observations": {
        "web": {
          "dom": "<html>...</html>",
          "page_info": {"title": "Example", "url": "https://example.com"}
        }
      }
    }
  }]
}

Click Element (CSS Selector)

{
  "version": "0.2",
  "steps": [
    {"action": "tap", "context": "web", "predicate": {"css_selector": "button.submit"}}
  ]
}

Type Text (CSS Selector)

{
  "version": "0.2",
  "steps": [
    {"action": "type", "context": "web", "predicate": {"css_selector": "input#email"}, "text": "user@example.com"}
  ]
}

Execute JavaScript

{
  "version": "0.2",
  "steps": [
    {"action": "execute_js", "script": "return document.querySelector('h1').textContent"}
  ]
}

Response:

{
  "step_results": [{
    "success": true,
    "result": {
      "js_value": "Page Title"
    }
  }]
}

Wait for Element to Load

{
  "version": "0.2",
  "steps": [
    {"action": "wait_for", "context": "web", "predicate": {"css_selector": "div.loaded"}, "timeout_ms": 5000}
  ]
}

Press Key in Web Context

{
  "version": "0.2",
  "steps": [
    {"action": "press_key", "context": "web", "key": "enter"}
  ]
}

Dispatches JavaScript keyboard events. Supported keys: enter, tab, delete, escape

Complete Login Flow

{
  "version": "0.2",
  "steps": [
    {"action": "select_web_context"},
    {"action": "navigate", "url": "https://example.com/login"},
    {"action": "wait_for", "context": "web", "predicate": {"css_selector": "form#login"}, "timeout_ms": 5000},
    {"action": "type", "context": "web", "predicate": {"css_selector": "input[name='username']"}, "text": "testuser"},
    {"action": "type", "context": "web", "predicate": {"css_selector": "input[name='password']"}, "text": "password123"},
    {"action": "tap", "context": "web", "predicate": {"css_selector": "button[type='submit']"}},
    {"action": "wait_for", "context": "web", "predicate": {"css_selector": ".dashboard"}, "timeout_ms": 10000}
  ],
  "on_fail": {"strategy": "abort"}
}

Handle Cookie Banner (conditional)

{
  "version": "0.2",
  "steps": [
    {
      "action": "if_exists",
      "context": "web",
      "predicate": {"css_selector": ".cookie-banner"},
      "then": [
        {"action": "tap", "context": "web", "predicate": {"css_selector": ".cookie-banner button.accept"}}
      ]
    }
  ]
}

CSS Selector Reference

Selector	Description
`#login-btn`	Element with id="login-btn"
`.btn-primary`	Elements with class="btn-primary"
`button.submit`	Button with class "submit"
`input[type='email']`	Input with type="email"
`input[name='username']`	Input with name="username"
`a[href*='login']`	Links containing "login" in href
`form input:first-child`	First input inside a form
`.form-group input`	Input inside element with class "form-group"
`button:contains('Submit')`	Button containing text "Submit"

JavaScript for Complex Tasks

Use JavaScript when CSS selectors aren't enough:

Click by Text Content

{"action": "execute_js", "script": "Array.from(document.querySelectorAll('button')).find(b => b.textContent.includes('Submit')).click()"}

Get Text Content

{"action": "execute_js", "script": "return document.querySelector('.result').textContent"}

Fill Hidden Field

{"action": "execute_js", "script": "document.querySelector('input[type=\"hidden\"]').value = 'test'"}

Submit Form

{"action": "execute_js", "script": "document.querySelector('form').submit()"}

Scroll Element into View

{"action": "execute_js", "script": "document.querySelector('.target').scrollIntoView()"}

Wait for Dynamic Content

{"action": "execute_js", "script": "return new Promise(resolve => { const check = () => document.querySelector('.loaded') ? resolve(true) : setTimeout(check, 100); check(); })"}

Execution Rules

Select web context first - Use select_web_context before web operations
Get DOM before interacting - Inspect HTML to find correct selectors
Use specific selectors - Prefer id > name > class > tag
Re-fetch DOM after navigation - Page content changes!
Handle dynamic content - Use wait_for or JavaScript for SPAs

Finding Elements

When searching for an element in the DOM:

Look for id attributes - most reliable
Look for name attributes - for form fields
Look for unique classes - avoid generic ones
Combine selectors if needed: form.login input[name='email']

Error Handling

Check step_results for failures:

{
  "success": false,
  "step_results": [
    {"success": true, "action": "select_web_context"},
    {
      "success": false,
      "action": "tap",
      "error": {
        "code": "EXECUTION_ERROR",
        "message": "element not found: button.submit"
      }
    }
  ]
}

Common issues:

Element not found - Check selector, element may not be loaded
Timeout - Page taking too long to load
No web context - Run select_web_context first

Reporting Results

When done, clearly state:

Success: What was accomplished
Failure: What went wrong (element not found, etc.)
Current URL: Where we ended up (from observe result)
Page title: What page we're on