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using-agent-skills

using-agent-skills is a skill for Claude Code from peterblazejewicz/claude-plugins. It costs 89 tokens per session (5,440 once invoked), scanned A, original, MIT.

A guide that helps choose among 23 .NET and C# development skills. .NET is Microsoft's software platform, and C# is its main programming language.

In plain words
What is it for?
Use it at the start of a .NET or C# task, especially when the right specialist skill is unclear. It covers technologies and tools including .NET 8, C# 12, xUnit, EF Core, Avalonia, and FluentValidation.
Why use it?
It helps an agent select a suitable workflow for tasks such as defining, planning, building, testing, reviewing, or shipping modern .NET projects.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: mentions CLAUDE.md; mentions Claude Code.

Part of the dotnet-skills plugin — 24 skills, 9 commands, 4 agents shipped together

not rated 8repo 4mo ago A scan 89 tokens original MIT

Good fit Use it at the start of a .NET or C# task, especially when the right specialist skill is unclear. It covers technologies and tools including .NET 8, C# 12, xUnit, EF Core, Avalonia, and FluentValidation.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/peterblazejewicz/claude-plugins/using-agent-skills
View source ↗ peterblazejewicz/claude-plugins
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 peterblazejewicz/claude-plugins --skill using-agent-skills
Clone the repo
git clone --depth 1 https://github.com/peterblazejewicz/claude-plugins

Made for: Claude Code.

Or install dotnet-skills, the plugin that ships this one along with the rest of its 24 skills, 9 commands, 4 agents.

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 using-agent-skills

README.md
[![agentmods](https://agentmods.dev/badge/skills/peterblazejewicz/claude-plugins/using-agent-skills/github.svg)](https://agentmods.dev/skills/peterblazejewicz/claude-plugins/using-agent-skills)
Your own site
<a href="https://agentmods.dev/skills/peterblazejewicz/claude-plugins/using-agent-skills"><img src="https://agentmods.dev/badge/skills/peterblazejewicz/claude-plugins/using-agent-skills/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 using-agent-skills

Your own site · 80×15
<a href="https://agentmods.dev/skills/peterblazejewicz/claude-plugins/using-agent-skills"><img src="https://agentmods.dev/badge/skills/peterblazejewicz/claude-plugins/using-agent-skills.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 89 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 5,440 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 $0.00089 $0.05440
Opus 5.5 $0.00036 $0.02176
Sonnet 5.5 $0.00018 $0.01088
Haiku 4.5 $0.00009 $0.00544

Measured 2mo ago against content hash bf9d8b793b90, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

using-agent-skills 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 2mo 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.

plugins/dotnet-skills/skills/using-agent-skills/SKILL.md · 299 lines

How it starts

The opening of the file, as written. The whole thing — 299 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Using dotnet-skills

Overview

dotnet-skills is a collection of 23 engineering workflow skills organized by development phase, targeted at modern .NET (8+ LTS, C# 12+). Each skill encodes a specific process with concrete dotnet CLI commands, NuGet-ecosystem tooling, and .NET-specific anti-patterns. This meta-skill helps you discover and apply the right skill for your current task.

The plugin is an indirect fork of addyosmani/agent-skills (MIT © 2025 Addy Osmani) with targeted adaptations — see the plugin's README.md and NOTICE.md. The companion avalonia-dev plugin in this marketplace covers structural Avalonia/MAUI reviews (design tokens, project layout, phased migration) and pairs naturally with the frontend-ui-engineering-avalonia skill defined here.

How Skills Activate

Two activation paths, both native to Claude Code plugins:

  1. Natural-language triggering — Each skill's YAML description is keyword-dense with .NET vocabulary (.NET 8, C# 12, xUnit, EF Core, Avalonia, dotnet test, FluentValidation, ProblemDetails, …). When your prompt matches, Claude Code offers the skill. You don't type anything special — just describe what you want.
  2. Explicit listing — Run /dotnet-skills to see every available skill grouped by phase, with natural-language trigger examples for each. Useful when you don't know the name yet, or when browsing what's possible.

Read the full file on GitHub · 299 lines

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. 2mo ago First seen · 299 lines · 89 tokens per session scan A bf9d8b793b90

Subscribe to this mod's changes

using-agent-skills is a skill published in the GitHub repository peterblazejewicz/claude-plugins (8 stars, last pushed 4mo ago), licensed MIT. It adds 89 tokens to every session and 5,440 once invoked, about $0.0004 per session on Opus 5.5. 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.

Building agentsClaude Codeagentic-aiavaloniacopilotdeveloper-experience
Related

using-agent-skills compared with skills from other repositories

using-agent-skills next to 6 skills from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
using-agent-skillspeterblazejewicz/claude-pluginsSkill84mo agoMITA89Claude Code
github-review-prfeiskyer/claude-code-settingsSkill1.7k2d agoMITA90Claude Code
grill-mefeiskyer/claude-code-settingsSkill1.7k2d agoMITA58Claude Code
gsap-pluginscalesthio/OpenMontageSkill78k4d agoAGPL-3.0A91Claude Code, Codex
gsap-scrolltriggercalesthio/OpenMontageSkill78k4d agoAGPL-3.0A68Claude Code, Codex
docs-managearabold/docs-mcp-serverSkill1.9k6d agoMITA68Claude Code, Codex
nanobanana-skillfeiskyer/claude-code-settingsSkill1.7k2d agoMITA109Claude Code