EventStream Lab

A local-only .NET 8 / ASP.NET Core SignalR proof for ordered event intake, bounded replay, backpressure, and stream diagnostics.

Status: native-validated public release (v1.0.0) Stack: .NET 8 / ASP.NET Core SignalR / C# Evidence: two screenshot groups, eight native browser captures

Core flow

1. subscribe a client to a named stream;
2. publish an event with a monotonically increasing sequence;
3. reject duplicates/out-of-order events;
4. flag sequence gaps;
5. request bounded replay;
6. retain only a bounded in-memory window;
7. report buffer depth, dropped events, gaps, and last sequence.

Public boundary

All events are generated fixtures. The default demo is local-only and has no production broker dependency.