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**The 10 Principles at a Glance:**
| Principle | Weight | Key Question |
|-----------|--------|--------------|
| **Observability** | 15% | Can we see what's happening? |
| **Controllability** | 15% | Can we control the application? |
| **Algorithmic Simplicity** | 10% | Are behaviors predictable? |
| **Algorithmic Transparency** | 10% | Can we understand what it does? |
| **Algorithmic Stability** | 10% | Does behavior remain consistent? |
| **Explainability** | 10% | Is the interface understandable? |
| **Unbugginess** | 10% | How error-free is it? |
| **Smallness** | 10% | Are components appropriately sized? |
| **Decomposability** | 5% | Can we test parts in isolation? |
| **Similarity** | 5% | Is the tech stack familiar? |

**Grade Scale:**
- **A (90-100)**: Excellent testability
- **B (80-89)**: Good testability
- **C (70-79)**: Adequate testability
- **D (60-69)**: Below average
- **F (0-59)**: Poor testability
</default_to_action>

1. Navigate to URL → 2. Collect Metrics → 3. Score Principles
                                              ↓
4. Generate JSON ← 5. Calculate Grades ← 6. Apply Weights
         ↓
7. Generate HTML Report with Radar Chart
         ↓
8. Open in Browser (auto-opens)

tests/reports/
├── testability-results-<timestamp>.json  # Raw data
├── testability-report-<timestamp>.html   # Visual report
└── latest.json                           # Symlink

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// Combine testability with QX analysis
const qxAnalysis = await Task("QX Analysis", {
  target: 'https://example.com',
  integrateTestability: true
}, "qx-partner");

// Returns combined insights:
// - QX Score: 78/100
// - Testability Integration: Observability 72/100
// - Combined Insight: Low observability may mask UX issues

import { runTestabilityAssessment } from './testability';

const results = await runTestabilityAssessment('https://example.com');
console.log(`Overall: ${results.overallScore}/100 (${results.grade})`);
console.log('Recommendations:', results.recommendations);

// Run testability assessment
const assessment = await Task("Testability Assessment", {
  url: 'https://example.com',
  generateReport: true,
  openBrowser: true
}, "qe-quality-analyzer");

// Use with QX Partner for holistic analysis
const qxReport = await Task("Full QX Analysis", {
  target: 'https://example.com',
  integrateTestability: true,
  detectOracleProblems: true
}, "qx-partner");

claude mcp add vibium -- npx -y vibium

// Testability assessment using both engines
const assessment = {
  // Playwright: Comprehensive metrics
  playwright: await runPlaywrightAssessment(url),

  // Vibium: Stability metrics
  vibium: {
    elementStability: await measureAutoWaitDuration(url),
    visualConsistency: await compareScreenshots(url),
    accessibilityAttributes: await extractARIALabels(url)
  }
};

// Enhanced Observability Score
const observability =
  (assessment.playwright.consoleErrors * 0.6) +
  (assessment.vibium.elementStability * 0.4);

// 1. Element Stability Measurement
const browser = await browser_launch();
await browser_navigate({ url });
const startTime = Date.now();
const element = await browser_find({ selector: ".critical-element" });
const autoWaitDuration = Date.now() - startTime;
// Lower duration = better stability

// 2. Visual Consistency Check
const screenshot1 = await browser_screenshot();
await browser_navigate({ url }); // Reload
const screenshot2 = await browser_screenshot();
const visualDiff = compareImages(screenshot1.png, screenshot2.png);
// Lower diff = better stability

// 3. Accessibility Attribute Extraction
const elements = await browser_find({ selector: "button, a, input" });
const ariaLabels = elements.map(el => el.attributes["aria-label"]);
const semanticScore = (ariaLabels.filter(Boolean).length / elements.length) * 100;

aqe/testability/
├── assessments/*       - Assessment results by URL
├── historical/*        - Historical scores for trend analysis
├── recommendations/*   - Improvement recommendations
├── integration/*       - QX integration data
└── vibium/*           - Vibium-specific metrics (optional)

const testabilityFleet = await FleetManager.coordinate({
  strategy: 'testability-assessment',
  agents: [
    'qe-quality-analyzer',  // Primary assessment
    'qx-partner',           // UX integration
    'qe-visual-tester'      // Visual validation
  ],
  topology: 'sequential'
});