Why on-device (or near-device) matters

For user-facing apps, latency and privacy are product features. The architecture should be designed around them.

System design highlights

• Prompting + retrieval tuned for mobile constraints
• Aggressive caching of stable context
• Guardrails for unsafe or low-confidence outputs

Practical lessons

• Measure tokens, not just time
• Keep the model interface stable and versioned
• Design fallbacks before you need them