dotnet-blazor

dotnet-blazor is a skill for Claude Code, Codex from Postpartum-genushyacinthus29/dotnet-skills. It costs 37 tokens per session (1,706 once invoked), scanned A, a copy of blazor, MIT.

A development guide for Blazor, Microsoft’s framework for building interactive web interfaces with C# and .NET. It covers applications that run on a server, in the browser, or in a hybrid setup.

In plain words
What is it for?
Use it to build or review Blazor components, choose server or WebAssembly rendering, handle prerendering and hydration, manage application state, and connect to JavaScript when required.
Why use it?
It helps choose where the interface runs and manage rendering, browser startup, shared state, and connections correctly. It also explains when JavaScript is needed alongside C# code.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to build or review Blazor components, choose server or WebAssembly rendering, handle prerendering and hydration, manage application state, and connect to JavaScript when required.

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Install with agentmods
npx agentmods add skills/postpartum-genushyacinthus29/dotnet-skills/dotnet-blazor
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add Postpartum-genushyacinthus29/dotnet-skills --skill dotnet-blazor
Clone the repo
git clone --depth 1 https://github.com/Postpartum-genushyacinthus29/dotnet-skills

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for dotnet-blazor

README.md
[![agentmods](https://agentmods.dev/badge/skills/postpartum-genushyacinthus29/dotnet-skills/dotnet-blazor/github.svg)](https://agentmods.dev/skills/postpartum-genushyacinthus29/dotnet-skills/dotnet-blazor)
Your own site
<a href="https://agentmods.dev/skills/postpartum-genushyacinthus29/dotnet-skills/dotnet-blazor"><img src="https://agentmods.dev/badge/skills/postpartum-genushyacinthus29/dotnet-skills/dotnet-blazor/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for dotnet-blazor

Your own site · 80×15
<a href="https://agentmods.dev/skills/postpartum-genushyacinthus29/dotnet-skills/dotnet-blazor"><img src="https://agentmods.dev/badge/skills/postpartum-genushyacinthus29/dotnet-skills/dotnet-blazor.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 37 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,706 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin 84% copy Near-identical to another mod in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00037 $0.01706
Opus 5 $0.00018 $0.00853
Sonnet 5 $0.00007 $0.00341
Haiku 4.5 $0.00004 $0.00171

Measured 11d ago against content hash b6d09c04a747, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

dotnet-blazor scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 11d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

Origin

This is a copy

84% identical to blazor — 11 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

skills/dotnet-blazor/SKILL.md · 248 lines

How it starts

The opening of the file, as written. The whole thing — 248 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Blazor

Trigger On

  • building interactive web UIs with C# instead of JavaScript
  • choosing between Server, WebAssembly, or Auto render modes
  • designing component hierarchies and state management
  • handling prerendering and hydration
  • integrating with JavaScript when necessary

Documentation

References

  • patterns.md - Detailed component patterns, state management strategies, and JS interop techniques
  • anti-patterns.md - Common Blazor mistakes and how to avoid them

Render Modes (.NET 8+)

Mode Where It Runs Best For
Static Server (no interactivity) SEO pages, marketing content
InteractiveServer Server via SignalR Real-time apps, thin clients
InteractiveWebAssembly Browser via WASM Offline-capable, client-heavy
InteractiveAuto Server first, then WASM Best of both worlds

Applying Render Modes

@* Per-component *@
@rendermode InteractiveServer

@* Or in App.razor for global *@
<Routes @rendermode="InteractiveAuto" />

InteractiveAuto Architecture

First Request:
  Browser → Server (Interactive Server) → Fast response

Subsequent Requests:
  Browser → WASM (downloaded in background) → No server needed

Workflow

  1. Choose render mode based on requirements:
    • Need SEO? Start with Static or prerendering
    • Need real-time? Use InteractiveServer
    • Need offline? Use InteractiveWebAssembly
    • Want both? Use InteractiveAuto

Read the full file on GitHub · 248 lines

Files

What ships with it

2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 11d ago First seen · 248 lines · 37 tokens per session scan A b6d09c04a747

Subscribe to this mod's changes

dotnet-blazor is a skill published in the GitHub repository Postpartum-genushyacinthus29/dotnet-skills (10 stars, last pushed yesterday), licensed MIT. It adds 37 tokens to every session and 1,706 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. It is 84% identical to blazor, differing in 11 lines, and is treated as a copy.

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