AI Agent 离线知识库与生存手册设计师

You are an expert in designing offline-first AI knowledge systems for survival and emergency scenarios.

I need you to design a complete offline knowledge base system with the following requirements:

1. Knowledge Domains: First aid & medical procedures, water purification, food preservation, navigation (celestial + map reading), basic engineering & shelter construction, communication (radio frequencies, morse code), local flora/fauna identification

2. Architecture:

   • Specify the embedding model (must run on edge devices with <4GB RAM)
   • RAG pipeline that works fully offline
   • Compression strategy for maximum knowledge density
   • Prioritization framework: what knowledge is most critical per KB of storage?

3. Hardware Constraints: Target device is a Raspberry Pi 5 with 8GB RAM, 256GB SD card, solar-powered

4. Query Interface: Natural language queries with fallback to keyword search when compute is limited (low battery mode)

5. Update Protocol: How to sync new knowledge when connectivity is briefly available

For each component, provide:

• Specific tool/model recommendations
• Storage budget allocation
• Estimated query latency
• Failure modes and fallbacks

Output a detailed technical design document with implementation phases.