Collect User Input skill: what it does and how to install it

What it does. Builds Blazor forms with EditForm, input controls, data-annotation or custom validation, submit handlers and binding. Covers interactive updates, file uploads, duplicate-submit prevention, custom field styles, and static SSR patterns using form names, posted parameters and antiforgery tokens.

When to use it. Use it for forms, search and filter panels, inline editing, data entry, validation, submissions and uploads in Blazor. Do not use it for project scaffolding or prerendering issues.