agentmods.dev

Omni.Blazor: Skill for Codex

.agents/skills/building-omni-blazor-apps/SKILL.md

building-omni-blazor-apps is a skill for Codex from afernandes/Omni.Blazor. It costs 71 tokens per session (836 once invoked), scanned A, original, MIT.

A guide for building Blazor applications with Omni.Blazor, a .NET component library for user-interface elements such as forms, dashboards, navigation, and data screens.

In plain words
What is it for?
Use it to create or review application screens, including forms, CRUD pages, dashboards, navigation, overlays, and migrations that use Omni.Blazor.
Why use it?
It helps select components that match the installed library version and use their documented APIs instead of guessing how they work.

Skill for Codex

Written for Codex: agents/openai.yaml present. Also seen: installed under .agents/ (shared by several agents); mentions AGENTS.md.

This is afernandes/Omni.Blazor's own configuration. It tells Codex how to work on Omni.Blazor itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything Omni.Blazor configures →

not rated 4repo yesterday A scan 71 tokens original MIT
View source ↗ afernandes/Omni.Blazor afernandes.github.io
Reuse

Borrowing it

Nothing to install: this file belongs to afernandes/Omni.Blazor. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/afernandes/Omni.Blazor/main/.agents/skills/building-omni-blazor-apps/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/afernandes/Omni.Blazor

Made for: 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 building-omni-blazor-apps

README.md
[![agentmods](https://agentmods.dev/badge/skills/afernandes/omni.blazor/building-omni-blazor-apps/github.svg)](https://agentmods.dev/skills/afernandes/omni.blazor/building-omni-blazor-apps)
Your own site
<a href="https://agentmods.dev/skills/afernandes/omni.blazor/building-omni-blazor-apps"><img src="https://agentmods.dev/badge/skills/afernandes/omni.blazor/building-omni-blazor-apps/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 building-omni-blazor-apps

Your own site · 80×15
<a href="https://agentmods.dev/skills/afernandes/omni.blazor/building-omni-blazor-apps"><img src="https://agentmods.dev/badge/skills/afernandes/omni.blazor/building-omni-blazor-apps.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 71 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 836 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 original No closer match found 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 $0.00071 $0.00836
Opus 5 $0.00036 $0.00418
Sonnet 5 $0.00014 $0.00167
Haiku 4.5 $0.00007 $0.00084

Measured 10d ago against content hash 48384cecd1b3, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

building-omni-blazor-apps 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 10d 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.

.agents/skills/building-omni-blazor-apps/SKILL.md · 71 lines

How it starts

The opening of the file, as written. The whole thing — 71 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Build applications with Omni.Blazor

Use Omni.Blazor as the application's UI vocabulary while preserving the consumer project's architecture, language, render mode, and product conventions.

Required workflow

  1. Resolve the consumer's actual AndersonN.Omni.Blazor version. Check direct and centrally managed package references; when necessary, inspect restored assets to resolve variables, ranges, or floating versions.
  2. Select a catalog that matches that version. Follow catalog and versioning. Do not use an old global MCP catalog for a newer package or main documentation for an older package.
  3. Search by user intent, then inspect each chosen component's exact API. If a component uses a typed schema, builder, or provider, inspect the corresponding configuration API as well. Never infer a parameter, event, slot, enum member, service method, or CSS class from its name.
  4. Read component selection when alternatives overlap. Read application patterns when composing a complete screen or flow.
  5. Implement the smallest coherent UI that satisfies the request. Preserve existing application structure and keep business rules, authorization, persistence, and orchestration outside Razor presentation code.
  6. Validate at the level affected by the change. Build the consuming project. For overlays, focus, keyboard behavior, JavaScript interop, responsive layout, or render-mode-sensitive behavior, exercise the rendered application in a browser.

Catalog rules

  • Prefer the omni-blazor MCP tools when their catalog version matches the resolved package: call get_catalog_info, then search_components and get_component.
  • Use search_configuration_apis and get_configuration_api for schema-driven forms, grids, filters, charts, schedulers, Kanban, Gantt, diagrams, or imports.
  • In a source checkout, llms.txt is the discovery index and docs/components.json / llms-full.txt are the public contract. Do not browse component source merely to discover its API.
  • Treat source inspection as implementation diagnosis, not as permission to use internal members.
  • OmniAiConversation belongs to the optional AndersonN.Omni.Blazor.Ai package; confirm that dependency before using it.

Read the full file on GitHub · 71 lines

Files

What ships with it

4 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. 10d ago First seen · 71 lines · 71 tokens per session scan A 48384cecd1b3

Subscribe to this mod's changes

building-omni-blazor-apps is a skill published in the GitHub repository afernandes/Omni.Blazor (4 stars, last pushed yesterday), licensed MIT. It adds 71 tokens to every session and 836 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

C# and .NETFrontendLanguages
Related

Other skills, from other repositories

avalonia-viewmodels-zafiro

Optimal ViewModel and Wizard creation patterns for Avalonia using Zafiro and ReactiveUI.

sickn33/agentic-awesome-skills · 26 tokens

avalonia-zafiro-development

Mandatory skills, conventions, and behavioral rules for Avalonia UI development using the Zafiro toolkit.

sickn33/agentic-awesome-skills · 27 tokens

convert-blazor-server-to-webapp

Guides conversion of a pre-.NET 8 Blazor Server app into a .NET 8+ Blazor Web App. USE FOR: migrating apps that use AddServerSideBlazor and MapBlazorHub to the AddRazorComponents/MapRazorComponents model, converting Host.cshtml to an App.razor root component, replacing blazor.server.js with blazor.web.js, migrating…

dotnet/skills · 176 tokens

create-blazor-project

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…

dotnet/skills · 104 tokens

coordinate-components

Share state between components that don't have a direct parent-child parameter relationship, using cascading values, scoped services with change events, or CascadingValueSource via DI. USE WHEN the user needs a CascadingParameter or CascadingValue that works across render mode boundaries, a shopping cart or…

dotnet/skills · 182 tokens

use-js-interop

Add, review, or fix JavaScript interop in Blazor components. USE FOR: calling JavaScript from Blazor, calling .NET from JavaScript, collocated .razor.js modules, IJSRuntime, IJSObjectReference lifecycle, DotNetObjectReference, ElementReference, timing rules for when JS is available, IAsyncDisposable disposal of JS…

dotnet/skills · 114 tokens