# Simple Product Requirements Document
## Chrome DevTools CLI Enhancement - Agent-Browser Feature Parity

**Document Version:** 1.0  
**Date:** January 15, 2026  
**Author:** SARAH (Strategic Artifact Refinement and Alignment Handler)

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## Problem Statement

### Problem Definition
Our current Chrome DevTools CLI (`src/cli.ts`) provides basic browser automation capabilities but lacks comprehensive feature parity with the industry-leading `agent-browser` CLI. This creates a significant gap in functionality, limiting users who need advanced browser automation features including semantic locators, session management, network interception, and AI-optimized workflows.

### Target Users
- **AI Agents & Developers**: Need deterministic element selection and AI-friendly command interfaces
- **Automation Engineers**: Require comprehensive browser control for testing and scraping
- **DevOps Teams**: Need headless browser capabilities for CI/CD pipelines
- **Product Teams**: Want fast prototyping and user flow validation

### Business Value
Achieving feature parity with `agent-browser` will:
- **Reduce Development Time**: 60% faster automation script development
- **Improve AI Integration**: Native support for AI-driven browser automation
- **Increase Adoption**: Match industry standards and user expectations
- **Enable New Use Cases**: Support for advanced features like network mocking and device emulation

---

## Solution Overview

### Solution Summary
Enhance our Chrome DevTools CLI to provide 100% feature parity with `agent-browser` while adding unique capabilities leveraging our Chrome DevTools Protocol foundation. The solution maintains our existing architecture while extending command coverage and adding AI-optimized features.

### Key Features
1. **Complete Command Parity**: All `agent-browser` commands implemented
2. **AI-Optimized Workflows**: Enhanced snapshot and ref-based interactions
3. **Advanced Selectors**: CSS, XPath, semantic locators, and ref-based selection
4. **Session Management**: Isolated browser instances with state persistence
5. **Network Interception**: Request/response mocking and monitoring
6. **Device Emulation**: Comprehensive mobile and desktop device support

### User Flow
```
1. Install CLI → 2. Launch browser session → 3. Navigate to target
4. Take AI-optimized snapshot → 5. Interact using refs/selectors
6. Execute complex workflows → 7. Close session
```

---

## Core Requirements

### Must-Have Features

#### 1. Core Browser Commands
- [ ] `open`/`goto`/`navigate` - URL navigation with wait conditions
- [ ] `close`/`quit`/`exit` - Browser/tab closure
- [ ] `back`/`forward`/`reload` - Navigation controls
- [ ] `tab new`/`tab close`/`tab switch` - Multi-tab management

#### 2. Element Interaction
- [ ] `click`/`dblclick` - Mouse interactions
- [ ] `fill`/`type` - Text input operations
- [ ] `hover`/`focus` - Element focus operations
- [ ] `press`/`key` - Keyboard input
- [ ] `select` - Dropdown selection
- [ ] `check`/`uncheck` - Checkbox operations

#### 3. Element Selection & Discovery
- [ ] `snapshot` - Accessibility tree with refs (AI-optimized)
- [ ] `find` - Semantic locators (role, text, label, etc.)
- [ ] CSS/XPath selector support
- [ ] Ref-based selection (`@e1`, `@e2`)

#### 4. Information Retrieval
- [ ] `get text`/`html`/`value`/`attr` - Element data extraction
- [ ] `get title`/`url` - Page information
- [ ] `get count`/`box` - Element counting and positioning
- [ ] `is visible`/`enabled`/`checked` - State checking

#### 5. Advanced Features
- [ ] `wait` - Conditional waiting (selector, text, URL, load states)
- [ ] `scroll` - Page and element scrolling
- [ ] `drag` - Drag and drop operations
- [ ] `upload` - File upload handling

#### 6. Media & Output
- [ ] `screenshot` - Full page and viewport captures
- [ ] `pdf` - Page export to PDF
- [ ] `trace start`/`stop` - Performance tracing
- [ ] `console`/`errors` - Debug information

#### 7. Browser Configuration
- [ ] `set viewport`/`device` - Display settings
- [ ] `set geo`/`offline` - Location and connectivity
- [ ] `set headers`/`credentials` - Request configuration
- [ ] `set media` - Color scheme emulation

#### 8. State Management
- [ ] `cookies get`/`set`/`clear` - Cookie management
- [ ] `storage local`/`session` - Web storage operations
- [ ] `state save`/`load` - Authentication state persistence

#### 9. Network Control
- [ ] `network route` - Request interception and mocking
- [ ] `network requests` - Request monitoring and filtering

#### 10. Session & Context
- [ ] `--session` - Isolated browser instances
- [ ] `frame` - Iframe context switching
- [ ] `dialog accept`/`dismiss` - Modal handling

### Technical Constraints
- Must maintain compatibility with existing Chrome DevTools Protocol backend
- Commands should follow `agent-browser` CLI patterns and flags
- Preserve existing session management and user data directory features
- Support both JSON and human-readable output modes

### Performance Goals
- Command execution time < 2 seconds for basic operations
- Memory usage < 100MB per browser session
- Support for 10+ concurrent sessions
- Snapshot generation < 5 seconds for complex pages

---

## Timeline & Success Metrics

### Major Milestones
1. **Phase 1 (Week 1-2)**: Core commands (open, click, fill, snapshot)
2. **Phase 2 (Week 3-4)**: Advanced selectors and element operations
3. **Phase 3 (Week 5-6)**: Network, storage, and state management
4. **Phase 4 (Week 7-8)**: Session management and advanced features
5. **Phase 5 (Week 9-10)**: Testing, documentation, and optimization

### Success Metrics
- **Feature Coverage**: 100% parity with `agent-browser` commands
- **Performance**: < 2 second command execution for 95% of operations
- **Compatibility**: Zero breaking changes to existing CLI usage
- **Adoption**: 80% of existing users migrate to enhanced version within 3 months
- **AI Optimization**: 50% reduction in AI agent interaction complexity

### Launch Criteria
- [ ] All core commands implemented and tested
- [ ] Comprehensive test suite with 90%+ coverage
- [ ] Updated documentation and help system
- [ ] Performance benchmarks meet targets
- [ ] Backward compatibility verified
- [ ] User acceptance testing completed

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🕷️ **S.A.R.A.H.**</content>
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