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 christian289/dotnet-with-claudecode --skill implementing-2d-graphicsgit clone --depth 1 https://github.com/christian289/dotnet-with-claudecodeWrote 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/christian289/dotnet-with-claudecode/implementing-2d-graphics)<a href="https://agentmods.dev/skills/christian289/dotnet-with-claudecode/implementing-2d-graphics"><img src="https://agentmods.dev/badge/skills/christian289/dotnet-with-claudecode/implementing-2d-graphics/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/christian289/dotnet-with-claudecode/implementing-2d-graphics"><img src="https://agentmods.dev/badge/skills/christian289/dotnet-with-claudecode/implementing-2d-graphics.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 1 finding, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium Excessive Agency · line 4 Skill selects an external model or provider that may use a different account or billing plan than the operator expects. Undisclosed model switches can cause unexpected cost or quota consumption.Fix: Remove the model/provider override or disclose it prominently and require explicit operator approval before invoking an external coding CLI or billed model.
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 | $0.00038 | $0.01936 |
| Opus 5 | $0.00019 | $0.00968 |
| Sonnet 5 | $0.00008 | $0.00387 |
| Haiku 4.5 | $0.00004 | $0.00194 |
Grade A, and why
implementing-2d-graphics 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 9d 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 — 264 lines — stays where its author put it; the contents beside it link to each section on GitHub.
WPF 2D Graphics Patterns
Implement vector-based visual elements using WPF's 2D graphics system.
1. Graphics Hierarchy
UIElement
└── Shape (FrameworkElement) ← Participates in layout, supports events
├── Ellipse
├── Rectangle
├── Line
├── Polyline
├── Polygon
└── Path
Drawing ← Lightweight, no events
├── GeometryDrawing
├── ImageDrawing
├── VideoDrawing
└── GlyphRunDrawing
2. Shape Basics
2.1 Basic Shapes
<!-- Ellipse -->
<Ellipse Width="100" Height="100"
Fill="Blue"
Stroke="Black"
StrokeThickness="2"/>
<!-- Rectangle -->
<Rectangle Width="100" Height="50"
Fill="Red"
Stroke="Black"
StrokeThickness="1"
RadiusX="10" RadiusY="10"/>
<!-- Line -->
<Line X1="0" Y1="0" X2="100" Y2="100"
Stroke="Green"
StrokeThickness="3"/>
<!-- Polyline (connected lines) -->
<Polyline Points="0,0 50,50 100,0 150,50"
Stroke="Purple"
StrokeThickness="2"
Fill="Transparent"/>
<!-- Polygon (closed shape) -->
<Polygon Points="50,0 100,100 0,100"
Fill="Yellow"
Stroke="Orange"
StrokeThickness="2"/>
2.2 Path and Geometry
<!-- Path: complex shapes -->
<Path Fill="LightBlue" Stroke="DarkBlue" StrokeThickness="2">
<Path.Data>
<PathGeometry>
<PathFigure StartPoint="10,10" IsClosed="True">
<LineSegment Point="100,10"/>
<ArcSegment Point="100,100" Size="50,50"
SweepDirection="Clockwise"/>
<LineSegment Point="10,100"/>
</PathFigure>
</PathGeometry>
</Path.Data>
</Path>
<!-- Mini-Language syntax -->
<Path Data="M 10,10 L 100,10 A 50,50 0 0 1 100,100 L 10,100 Z"
Fill="LightGreen" Stroke="DarkGreen"/>
2.3 Path Mini-Language
| Command | Description | Example |
|---|---|---|
| M | MoveTo (start point) | M 10,10 |
| L | LineTo (straight line) | L 100,100 |
| H | Horizontal LineTo | H 100 |
| V | Vertical LineTo | V 100 |
| A | ArcTo (arc) | A 50,50 0 0 1 100,100 |
| C | Cubic Bezier | C 20,20 40,60 100,100 |
| Q | Quadratic Bezier | Q 50,50 100,100 |
| Z | ClosePath | Z |
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.
- 9d ago First seen · 264 lines · 38 tokens per session scan A 5fdf2d777485
implementing-2d-graphics is a skill published in the GitHub repository christian289/dotnet-with-claudecode (41 stars, last pushed 1mo ago), licensed MIT. It adds 38 tokens to every session and 1,936 once invoked, about $0.0002 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 2026-08-30.
Other skills, from other repositories
microsoft-extensions-ai
Build provider-agnostic .NET AI integrations with Microsoft.Extensions.AI, IChatClient, embeddings, middleware, structured output, vector search, and evaluation. USE FOR: building or reviewing .NET code that uses Microsoft.Extensions.AI, Microsoft.Extensions.AI.Abstractions, IChatClient, IEmbeddingGenerator…
semantic-kernel
Build AI-enabled .NET applications with Semantic Kernel using services, plugins, prompts, and function-calling patterns that remain testable and maintainable. USE FOR: adding AI-driven prompts, plugins, or orchestration to a .NET app; reviewing kernel construction, service registration, or plugin usage; building…
sep
Use Sep for high-performance separated-value parsing and writing in .NET, including delimiter inference, explicit parser/writer options, and low-allocation row/column workflows. USE FOR: delimited data needs are performance-sensitive and allocation-aware; project needs explicit control over separator inference…
managedcode-markitdown
Use ManagedCode.MarkItDown when a .NET application needs deterministic document-to-Markdown conversion for ingestion, indexing, summarization, or content-processing workflows. USE FOR: ManagedCode.MarkItDown integration; document ingestion flows; Office or rich-text conversion to Markdown; indexing and summarization…
maui-essentials-ai
Adopt Microsoft.Maui.Essentials.AI for local/on-device MAUI AI. USE FOR: Apple Intelligence chat, IChatClient, iOS/macOS/Mac Catalyst 26+ checks, fallback UI, NLEmbeddingGenerator, local tool invocation, privacy/offline UX. DO NOT USE FOR: source-generated tools, cloud-only AI, UI debugging.
mlnet
Use ML.NET to train, evaluate, or integrate machine-learning models into .NET applications with realistic data preparation, inference, and deployment expectations. USE FOR: ML.NET integration; local model training or retraining; inference pipelines, model loading, evaluation, and deployment review. DO NOT USE FOR…