SandSync is an offline-first AI storytelling app built for the PowerSync AI Hackathon 2026. An AI agent pipeline writes the stories, PowerSync keeps them on the device, and they sync when connectivity returns. The frontend demo and the repository are public.
Evidence · as of 16 Oct 2026
Problem
Offline-first apps need reliable sync and conflict handling without fragile glue code.
Experiment
Combine Supabase, PowerSync and an AI agent pipeline in a hackathon build.
Shipped artifact
A deployed frontend demo and a public repository.
Result
A working offline-first architecture built under hackathon constraints.
What we learned
The strongest hackathon projects show an architecture that could survive after the demo.
Proof assets