Individual skill

author-component

Create or review Blazor components (.razor files) with correct architecture. USE FOR: writing new Blazor components that do NOT involve JavaScript interop, implementing parameters and EventCallback, RenderFragment slots, component lifecycle (OnInitializedAsync, OnParametersSet), async patterns, IAsyncDisposable, CancellationToken, CSS isolation, code-behind. DO NOT USE FOR: creating new projects (use create-blazor-project), JavaScript interop or calling browser APIs from Blazor (use use-js-interop), forms and validation (use collect-user-input), prerendering issues (use support-prerendering), HTTP data fetching patterns (use fetch-and-send-data), coordinating state between unrelated components (use coordinate-components).

plugins/dotnet-blazor/skills/author-component/SKILL.md

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Matches the observed repository HEAD: Yes
Scanner rules are current: Yes
Repository scan complete: No
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Observed behavior: Network or broad shell
Last checked: Nov 4, 2026

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Repository stars (not skill ratings): 5,851
Repository last updated: Nov 6, 2026
License: MIT

Observed agent integration: No specific integration evidence. Standard SKILL.md installation does not imply verified compatibility.

agent-skills Repository topic
engineering Derived category
writing Derived category
data Derived category

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SKILL.mdcore · 3,344 bytes
references/async-programming-rules.mddoc · 6,981 bytes
references/breaking-down-components.mddoc · 3,236 bytes
references/component-disposal.mddoc · 2,801 bytes

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# Author Blazor Component

## Core Rules

- Data flows **down** via `[Parameter]`. Events flow **up** via `EventCallback<T>` (never `Action`/`Func`).
- Never mutate `[Parameter]` properties. Copy to a private field in `OnParametersSet`.
- Use `[Parameter] public T Prop { get; set; }` — never `required` or `init` (causes BL0007).
- Use `[EditorRequired]` for required parameters.
- Handle all states: loading, empty, loaded, error — each with `@if`/`@else`.
- Use `@key` on repeated elements in loops for efficient diffing.
- Use `IReadOnlyList<T>` (not `IEnumerable<T>`) for collection parameters.

## RenderFragment & Generics