Data Safety Auditor

Purpose: Comprehensive audit tool that identifies data loss risks in Vue 3 + Pinia + IndexedDB + PouchDB applications with actionable remediation guidance.

Philosophy

This skill provides rigorous data safety analysis with:

• Zero tolerance for data loss - Identifies every potential failure point
• Complete coverage - Storage, sync, hydration, integrity, testing
• Evidence-based findings - Code locations, patterns, severity
• Actionable fixes - Specific remediation with code examples
• Test generation - Creates missing safety tests

What It Detects

CRITICAL Risks (Deployment Blockers)

• QUOTA_EXCEEDED - Storage full, data can't save
• SAFARI_ITP_EXPIRATION - 7-day data loss on Safari
• UNHANDLED_QUOTA_ERROR - QuotaExceededError not caught
• NO_CONFLICT_RESOLUTION - PouchDB conflicts not handled
• NON_ATOMIC_UPDATES - Multi-item updates can partially fail

HIGH Risks (Must Fix)

• HYDRATION_RACE_CONDITION - Pinia data loads after render
• NO_SYNC_ERROR_HANDLING - Sync failures silently fail
• INCOMPLETE_SYNC_UNDETECTED - Stranded data not detected
• RACE_CONDITION_SAME_KEY - Concurrent LocalForage writes
• UNHANDLED_STORAGE_ERROR - Storage calls have no try/catch

MEDIUM Risks (Should Fix)

• NO_CHECKSUM_VERIFICATION - Data corruption undetected
• NO_PRIVATE_MODE_HANDLING - Private mode data loss unhandled
• NO_PERSISTENT_STORAGE_REQUEST - PWA not requesting persist
• STORAGE_PARTITIONING_UNACCOUNTED - iframe storage isolated
• DRIVER_VALIDATION_MISSING - LocalForage driver not checked

LOW Risks (Consider Fixing)

• NO_PERSISTENCE_TESTS - Missing persistence test coverage
• NO_OFFLINE_TESTS - Offline sync not tested
• MISSING_SAFARI_TESTS - Safari-specific tests missing

Detection Categories

A. Browser-Specific Data Loss Vectors

• Storage quota limits and eviction policies per browser
• Safari ITP 7-day storage limitations
• Private/incognito mode behavior
• Storage partitioning impacts

B. Storage-Specific Patterns

• LocalForage race conditions
• Concurrent write conflicts
• Driver fallback behavior
• Configuration issues

C. Sync Patterns

• PouchDB/CouchDB conflict detection
• Network failure handling
• Incomplete sync detection
• Sync integrity verification

D. Vue/Pinia Risks

• Hydration race conditions
• beforeRestore/afterRestore hooks
• Object reference breakage
• Multiple persistence sources

E. Data Integrity Checks

• Schema validation on load
• Checksum verification
• Corruption detection
• Backup/recovery validation

F. Testing & Compliance

• Persistence test coverage
• Quota failure tests
• OWASP compliance
• GDPR data integrity

Usage

const auditor = new DataSafetyAuditor();

// Full project audit
const report = await auditor.auditVueApp('./src');
console.log(report.toConsole());

// Targeted audits
const quotaFindings = await auditor.checkQuotaRisks(codeAST);
const itpFindings = await auditor.checkSafariCompat(codeAST);
const piniaFindings = await auditor.checkPiniaPersistence(piniaStore);
const syncFindings = await auditor.checkSyncIntegrity(pouchdbCode);

// Generate missing tests
const tests = await auditor.generateTestSuite();

// Get detailed remediation
const fixes = await auditor.suggestRemediations(findings);

Report Formats

• Console - Colored, readable CLI output with severity indicators
• JSON - Machine-readable for CI/CD integration
• Markdown - Documentation and reports
• HTML - Interactive dashboard view

Deployment Gate

The auditor enforces deployment gates:

• CRITICAL findings = Deployment blocked
• HIGH findings = Warning, recommend fixing
• MEDIUM/LOW = Information only

When to Use

Use this skill when:

• Before deploying to production
• After adding new persistence features
• When debugging data loss issues
• During code review of storage code
• Setting up CI/CD quality gates
• Auditing third-party storage libraries

Integration

CI/CD Pipeline

const report = await auditor.auditVueApp('./src');
if (report.hasBlockers()) {
  console.error('DEPLOYMENT BLOCKED: Critical data safety issues found');
  process.exit(1);
}

Custom Rules

auditor.rules.addRule('MUST_USE_ENCRYPTION', (code) => {
  if (code.includes('sensitive_data') && !code.includes('crypto.subtle')) {
    return { severity: 'CRITICAL', msg: 'Sensitive data must be encrypted' };
  }
});

---

MANDATORY USER VERIFICATION REQUIREMENT

Policy: No Safety Claims Without User Confirmation

CRITICAL: Before claiming ANY data safety issue is "fixed", "resolved", or "safe", the following verification protocol is MANDATORY:

Step 1: Technical Verification

• Run full audit with all detectors
• Verify no CRITICAL or HIGH findings
• Take screenshots/evidence of clean audit

Step 2: User Verification Request

REQUIRED: Use the AskUserQuestion tool to explicitly ask the user to verify:

"I've completed the data safety audit. Before confirming your app is safe, please verify:
1. [Specific storage operations to test]
2. [Sync scenarios to test]
3. [Browser-specific tests to run]

Please confirm the data persists correctly, or let me know what's failing."

Step 3: Wait for User Confirmation

• DO NOT claim app is "data safe" until user confirms
• DO NOT approve deployment without user verification
• DO NOT skip any CRITICAL finding verification

Remember: The user is the final authority on data safety. No exceptions.