Every card is a runnable KingStack demo, from browser-only tooling to full-stack collaboration backed by the real application runtime.
Runtime
Full stack
Agent guidance
Repository-owned
Boundaries
Production-shaped
Reference features
Pick a feature and run the real implementation.
These are working examples, not screenshots. Each one runs the real implementation and the same architectural boundaries used by the application.
Optimistic UI
The interface and real post database side by side, with the production mutation pipeline between them. Add latency or reject a request to watch reconciliation and rollback.
Realtime collaboration
Two isolated clients on one screen, sharing presence and server events while optimistic writes reconcile.
Collaborative canvas
A fixed world where presence is published in world coordinates, so a cursor lands on the same gridline on a laptop and a phone.
Global wave pool
One server-authoritative wave field shared by everyone, with pointer trails and taps rendered through a compact Three.js surface.
Theme system
Change a handful of semantic CSS variables and watch a complete application interface update instantly—colors, surfaces, charts, spacing, and shape.