# Simple Product Requirements Document: E2E Baseline Screenshot Feature

## Problem Statement

### Problem Definition
The current co-chrome e2e testing framework lacks support for creating baseline screenshots, which are essential for visual regression testing. Teams need an automated way to capture initial screenshots of web pages for comparison against future test runs to detect unintended visual changes.

### Target Users
- QA Engineers responsible for end-to-end testing
- Frontend Developers maintaining visual consistency
- DevOps teams implementing CI/CD pipelines with visual testing

### Business Value
Implementing baseline screenshot functionality will:
- Reduce manual testing effort for visual regression
- Catch UI bugs early in the development cycle
- Improve product quality and user experience consistency
- Enable automated visual testing in CI/CD pipelines

## Solution Overview

### Solution Summary
Extend the co-chrome e2e testing tool to support automated baseline screenshot creation. The feature will navigate to a specified URL, extract grid item links, visit each linked page, and capture full-page screenshots to establish visual baselines for regression testing.

### Key Features
1. **E2E Configuration Helper**: Automated generation of config files for baseline screenshot workflows
2. **Grid Link Extraction**: Intelligent detection and extraction of 9 grid item links from the target page
3. **Automated Screenshot Capture**: Sequential navigation to each link with full-page screenshot capture
4. **Baseline Storage**: Organized storage of screenshot files for future comparison

### User Flow
1. User runs e2e baseline command with target URL
2. Tool navigates to http://localhost:3000/
3. Automatically detects and extracts 9 grid item links
4. Sequentially visits each link and captures full-page screenshot
5. Saves screenshots as baseline images in designated directory
6. Provides summary of captured baselines

## Core Requirements

### Must-Have Features
- **Config File Generation**: Helper to create e2e configuration files for baseline screenshot workflows
- **URL Navigation**: Ability to navigate to specified localhost URLs (starting with http://localhost:3000/)
- **Grid Link Detection**: Extract exactly 9 links from grid-based page layouts
- **Screenshot Capture**: Full-page screenshot functionality for each visited page
- **Baseline Naming**: Automatic naming convention for baseline images (e.g., baseline-1.png, baseline-2.png, etc.)
- **Error Handling**: Graceful handling of navigation failures or missing elements

### Technical Constraints
- Must use Chrome DevTools Protocol (CDP) for browser automation
- Target application runs on localhost:3000
- Screenshots must capture full page content including scrollable areas
- Compatible with existing co-chrome e2e framework architecture

### Performance Goals
- Complete baseline capture for all 9 grid items within 2 minutes
- Screenshot capture resolution of at least 1920x1080 pixels
- Memory usage under 500MB during execution
- No more than 5% failure rate for screenshot capture

## Timeline & Success Metrics

### Major Milestones
1. **Phase 1 (Week 1)**: E2E config file creation and basic navigation setup
2. **Phase 2 (Week 2)**: Grid link extraction and sequential page navigation
3. **Phase 3 (Week 3)**: Screenshot capture implementation and baseline storage
4. **Phase 4 (Week 4)**: Testing, optimization, and documentation

### Success Metrics
- **Screenshot Capture Rate**: 100% success rate for all 9 grid item screenshots
- **Execution Time**: Average completion time under 90 seconds
- **Image Quality**: All baseline images meet minimum resolution requirements
- **User Adoption**: Feature used in at least 3 different projects within first month
- **Error Rate**: Less than 2% failure rate in production usage

### Launch Criteria
- All must-have features implemented and tested
- Successful baseline capture for the target localhost:3000 grid application
- Documentation provided for configuration and usage
- Integration with existing co-chrome e2e command structure
- Performance benchmarks met for all core requirements

🔧 **Template Used:** create-prd-simple-tmpl