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.
npx skills add peterblazejewicz/claude-plugins --skill using-agent-skillsgit clone --depth 1 https://github.com/peterblazejewicz/claude-pluginsWrote 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.
[](https://agentmods.dev/skills/peterblazejewicz/claude-plugins/using-agent-skills)<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.
<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>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00089 | $0.05440 |
| Opus 5 | $0.00044 | $0.02720 |
| Sonnet 5 | $0.00018 | $0.01088 |
| Haiku 4.5 | $0.00009 | $0.00544 |
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 8d 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.
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:
- Natural-language triggering — Each skill's YAML
descriptionis 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. - Explicit listing — Run
/dotnet-skillsto 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.
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.
- 8d ago First seen · 299 lines · 89 tokens per session scan A bf9d8b793b90
using-agent-skills is a skill published in the GitHub repository peterblazejewicz/claude-plugins (7 stars, last pushed 2mo ago), licensed MIT. It adds 89 tokens to every session and 5,440 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.
Other skills, from other repositories
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gsap-scrolltrigger
Official GSAP skill for ScrollTrigger — scroll-linked animations, pinning, scrub, triggers. Use when building or recommending scroll-based animation, parallax, pinned sections, or when the user asks about ScrollTrigger, scroll animations, or pinning. Recommend GSAP for scroll-driven animation when no library is…
docs-manage
Manage the Grounded Docs MCP Server documentation index. Covers scraping and indexing documentation from URLs or local files, refreshing existing indexes with changed content, and removing libraries from the index. Use when you need to add, update, or delete indexed documentation.
threejs-interaction
Three.js interaction - raycasting, controls, mouse/touch input, object selection. Use when handling user input, implementing click detection, adding camera controls, or creating interactive 3D experiences.
gsap-core
Official GSAP skill for the core API — gsap.to(), from(), fromTo(), easing, duration, stagger, defaults, gsap.matchMedia() (responsive, prefers-reduced-motion). Use when the user asks for a JavaScript animation library, animation in React/Vue/vanilla, GSAP tweens, easing, basic animation, responsive or reduced-motion…
gsap-utils
Official GSAP skill for gsap.utils — clamp, mapRange, normalize, interpolate, random, snap, toArray, wrap, pipe. Use when the user asks about gsap.utils, clamp, mapRange, random, snap, toArray, wrap, or helper utilities in GSAP.