Enforce SignalR Hub best practices for ASP.NET Core projects.
npx skills add https://github.com/CloudyWing/ai-dotfiles --skill csharp-signalr
Please help me install this Agent Skill. Skill: csharp-signalr Source: https://github.com/CloudyWing/ai-dotfiles/tree/main/skills/csharp-signalr Command: npx skills add https://github.com/CloudyWing/ai-dotfiles --skill csharp-signalr
Prevents common SignalR Hub implementation mistakes and ensures reliable, secure, and scalable real-time messaging by prescribing correct Hub lifetime, state management, authorization, error handling, and scale-out patterns.
Ask the AI to review or generate SignalR Hub code following csharp-signalr rules ensuring transient Hubs, no instance fields, external state storage, correct group management, JWT query handling for WebSockets, HubException usage for structured errors, and Redis or Azure backplane configuration for scale-out.
High-intent search queries and answers about installing and using this skill.
SignalR Hub instances are transient, so you cannot store per-connection state in instance fields. You must use external state stores like Redis, databases, or IMemoryCache to persist data across Hub method calls.
To authenticate SignalR WebSocket connections, you must handle JWT tokens passed through the query string. This approach ensures secure real-time messaging when standard headers are not supported by the WebSocket protocol.
The best way to scale out SignalR is to configure a Redis Backplane or use the Azure SignalR Service. These backplane strategies prevent cross-instance message loss and ensure reliable real-time messaging.
To send SignalR messages from outside a Hub, you should inject and use IHubContext. This pattern allows external services or controllers to push real-time updates to connected clients and manage group memberships.
To handle errors in SignalR Hubs, throw a HubException to return structured error details to the client. This prevents exposing sensitive server stack traces while allowing the client to process real-time messaging failures safely.
You use the SignalR OnConnected and OnDisconnected hooks to manage the connection lifecycle. These hooks are essential for tracking user presence, registering meaningful group names, and cleaning up resources when connections drop.
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