offline-mode

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

(Select at least one profile to enable specific modules)

• DevOps
• Backend
• Frontend
• AI-RAG
• Security Critical

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

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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