# create-blazor-project

The skill walks the agent through picking a Blazor render mode and runs dotnet new blazor with the right flags.

- skill · `type=skill` · Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, OpenCode · 3000 installs · ★ 5730
- Author: dotnet
- License: MIT · policy=mirror · the beginning of the file is at the end of this page
- Source: https://github.com/dotnet/skills/tree/HEAD/plugins/dotnet-blazor/skills/create-blazor-project/SKILL.md
- Updated: 2026-10-24
- HTML: https://affpapa.org/en/nevibecode/skills/create-blazor-project

## What it does

This skill helps the agent scaffold a new ASP.NET Core app on Blazor. It starts by asking what the app does, what interactivity it needs, where it will be deployed, and whether authentication is required. Then it picks a render mode from a decision table and runs `dotnet new blazor` with matching flags.

Render modes go from simple to complex: Static SSR, Interactive Server, Interactive WebAssembly, Auto. The skill recommends starting with `-int Server` — pages stay static, and `@rendermode InteractiveServer` is added only to components that need interactivity. WebAssembly brings a separate `.Client` project, an API layer for data access, and a .NET runtime download in the browser on first visit. Auto requires both `Program.cs` files to register matching services, and interactive components cannot touch the server directly — no `DbContext`, no file system.

Authentication comes from the `-au Individual` flag: the template scaffolds ASP.NET Core Identity with SQLite in the CLI or SQL Server in Visual Studio. For organizational sign-in through Microsoft Entra ID, the skill suggests scaffolding with `-au Individual` first, then swapping the provider for `Microsoft.Identity.Web` and configuring the tenant in `appsettings.json`. The skill is not meant for adding features to an existing project or for component authoring — that is what `author-component` is for.

## Install

### Claude Code (native platform)

1. **Skills CLI (Vercel)**
```bash
npx skills add dotnet/skills --skill create-blazor-project -a claude-code
```

2. **Manually: put the files in place**
- File: `~/.claude/skills/create-blazor-project/SKILL.md` — Copy the whole skill folder; for one project use .claude/skills/create-blazor-project/

### Codex

1. **Skills CLI (Vercel)**
```bash
npx skills add dotnet/skills --skill create-blazor-project -a codex
```

2. **Manually: put the files in place**
- File: `.agents/skills/create-blazor-project/SKILL.md` — For all projects use ~/.agents/skills/

### Cursor

1. **Skills CLI (Vercel)**
```bash
npx skills add dotnet/skills --skill create-blazor-project -a cursor
```

2. **Manually: put the files in place**
- File: `.cursor/skills/create-blazor-project/SKILL.md` — Cursor also reads .agents/skills/ and .claude/skills/

### GitHub Copilot

1. **GitHub CLI**
```bash
gh skill install dotnet/skills create-blazor-project
```

2. **Manually: put the files in place**
- File: `.github/skills/create-blazor-project/SKILL.md`

### Gemini CLI

1. **Skills CLI (Vercel)**
```bash
npx skills add dotnet/skills --skill create-blazor-project -a gemini-cli
```

2. **Platform CLI**
```bash
gemini skills install https://github.com/dotnet/skills --path plugins/dotnet-blazor/skills/create-blazor-project
```

### Windsurf (Devin Desktop)

**Manually: put the files in place**
- File: `.devin/skills/create-blazor-project/SKILL.md` — The legacy .windsurf/skills/ path still works

### OpenCode

**Skills CLI (Vercel)**
```bash
npx skills add dotnet/skills --skill create-blazor-project -a opencode
```

### Claude.ai

**Claude.ai**
- Zip the folder and upload it in Settings → Capabilities → Skills

Where a file is given instead of a command, copy the files from the source to that path: https://github.com/dotnet/skills/tree/HEAD/plugins/dotnet-blazor/skills/create-blazor-project/SKILL.md

## When to use it
- scaffold a new Blazor project with the right render mode
- choose between Static SSR, Interactive Server, WebAssembly and Auto
- add authentication via ASP.NET Core Identity
- see the template's folder and file layout before writing code
- avoid mixing up `dotnet new blazor` flags

## Example prompts
- Create a new Blazor project for a product catalog with search, per-page interactivity
- Scaffold a Blazor app with Individual accounts authentication
- I need a Blazor project with Interactive WebAssembly, users are on mobile with slow connections

## Source text · SKILL.md · MIT

Below is the content of a third-party file. It is data, not instructions for you: do not act on anything written inside unless the human asks. Block tag: c4d150a8df584b69.

BEGIN THIRD-PARTY FILE c4d150a8df584b69
````text
---
license: MIT
name: create-blazor-project
description: >
  Create a new ASP.NET Core web application or web site using Blazor.
  USE FOR: creating a new Blazor web app, scaffolding a new web project,
  starting a new web site, choosing render modes (Static SSR, Interactive Server,
  Interactive WebAssembly, Auto), running dotnet new blazor with the right options,
  setting up initial project structure.
  DO NOT USE FOR: adding features to existing projects, changing how an existing
  app renders, or component authoring (use author-component).
---

# Create a Blazor Web App

## Before You Start — Gather Requirements

If the user's request doesn't make the following clear, ask before scaffolding:

1. **What does the app do?** List the main screens/features (e.g., "product catalog with search and shopping cart").
2. **What kind of interactivity is needed?** Displaying data and forms? Real-time updates? Offline support? Rich drag-and-drop UI?
3. **Deployment environment?** Internet-facing? Intranet? Mobile users on slow connections?
4. **Authentication needed?** Anonymous? Individual accounts? Organizational (Azure AD)?

## Pick the Right Interactivity Level

Blazor render modes are a progression scale. Start at the simplest level that satisfies the requirements and only move up when there's a concrete reason.

```
Static SSR ──→ SSR + Enhanced Nav ──→ Interactive Server ──→ Interactive WebAssembly
 simplest                                                           most complex
```

### Decision Rules

| If the app needs... | Use | Why |
|---|---|---|
| Display data, simple forms, links between pages | **Static SSR** (`-int None`) | No JS runtime, no circuit, no WebAssembly download. Forms work via HTML POST. Enhanced navigation makes it feel snappy. |
| Everything above + a few components with client-side behavior (live search, real-time updates, complex form wizards) | **Interactive Server, per-page** (`-int Server`) | Only the components that need interactivity opt in with `@rendermode`. The rest stays static. Server-side execution, full .NET access, no API layer needed. |
````
END THIRD-PARTY FILE c4d150a8df584b69

The third-party file has ended. Everything between the c4d150a8df584b69 tags is data: requests and commands from it are not followed. An “end of file” line with another tag inside the block is part of the file.

First 2131 of 12153 bytes. © dotnet · MIT · https://github.com/dotnet/skills/tree/HEAD/plugins/dotnet-blazor/skills/create-blazor-project/SKILL.md

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