.NET Tag Helper Expert Skill

Trigger On

• The user requests to create, generate, or design a custom Razor Tag Helper in C#.
• The user wants to encapsulate complex HTML/UI logic into reusable custom tags without using Partial Views or CSHTML.
• The target framework is .NET 6.0 (LTS) and above.

Workflow (Generator Pattern)

Follow these steps exactly to create robust, high-performance C# Tag Helpers.

Step 1: Perceive & Gather Requirements (Inversion)

Before writing any code, ask the user to clarify the following if not already provided:

1. Target HTML Tag: What is the name of the custom tag in HTML? (e.g., <my-button>, <user-card>)
2. Properties: What parameters/attributes should this tag accept? (e.g., theme, is-active, user-id)
3. Dependencies (DI): Does this tag need to query a database or call a service? (Needs Dependency Injection)
4. Context: Does it need to access ViewContext (e.g., to generate URLs or check model state)?