| id | SKL-offline-OFFLINEMODE |
| name | Offline Mode |
| description | Offline-first apps work without network connectivity by storing data locally and synchronizing when connectivity is restored. This guide covers local storage, data sync, conflict resolution, and cache |
| version | 1.0.0 |
| status | active |
| owner | @cerebra-team |
| last_updated | 2026-02-22 |
| category | Backend |
| tags | ["api","backend","server","database"] |
| stack | ["Python","Node.js","REST API","GraphQL"] |
| difficulty | Intermediate |
Offline Mode
Skill Profile
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Overview
Offline-first apps work without network connectivity by storing data locally and synchronizing when connectivity is restored. This guide covers local storage, data sync, conflict resolution, and cache strategies for building resilient mobile applications that work in poor network conditions.
Why This Matters
- User Experience: Apps work regardless of connectivity
- Data Integrity: Proper sync prevents data loss
- Performance: Local storage provides instant access
- Resilience: Apps handle network failures gracefully
Core Concepts & Rules
1. Core Principles
- Follow established patterns and conventions
- Maintain consistency across codebase
- Document decisions and trade-offs
2. Implementation Guidelines
- Start with the simplest viable solution
- Iterate based on feedback and requirements
- Test thoroughly before deployment
Inputs / Outputs / Contracts
- Inputs:
- Data from API
- User actions (create, update, delete)
- Network status
- Entry Conditions:
- Local storage configured
- Sync service set up
- Network detection implemented
- Outputs:
- Local data updates
- Sync queue operations
- Conflict resolution results
- UI state updates
- Artifacts Required (Deliverables):
- Storage service implementation
- Sync service implementation
- Conflict resolution logic
- Network detection service
