data-safety-auditor

# 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 beha