SignalR.OpenApi

Developing SignalR.OpenApi — an ASP.NET Core library generating OpenAPI specs and SwaggerUI for SignalR hubs. Use when modifying hub discovery, OpenAPI document generation, SwaggerUI plugin JS, FluentValidation schema processing, or the sample app. Covers System.Text.Json polymorphic serialization gotchas, Swashbuckle plugin registration, form-urlencoded handling, and embedded resource serving.