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 creating-wpf-animationsgit 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/creating-wpf-animations)<a href="https://agentmods.dev/skills/christian289/dotnet-with-claudecode/creating-wpf-animations"><img src="https://agentmods.dev/badge/skills/christian289/dotnet-with-claudecode/creating-wpf-animations/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/creating-wpf-animations"><img src="https://agentmods.dev/badge/skills/christian289/dotnet-with-claudecode/creating-wpf-animations.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 5 findings, up to high
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 →
- high Prompt Injection · line 41 Hidden instructions were detected in comments or invisible text. These could contain malicious directives. Manual review is recommended.Fix: Audit all comments and invisible characters. Remove any instructions that direct the agent to perform unauthorized actions. Use plain, reviewable content.
- high Prompt Injection · line 104 Hidden instructions were detected in comments or invisible text. These could contain malicious directives. Manual review is recommended.Fix: Audit all comments and invisible characters. Remove any instructions that direct the agent to perform unauthorized actions. Use plain, reviewable content.
- high Prompt Injection · line 129 Hidden instructions were detected in comments or invisible text. These could contain malicious directives. Manual review is recommended.Fix: Audit all comments and invisible characters. Remove any instructions that direct the agent to perform unauthorized actions. Use plain, reviewable content.
- high Prompt Injection · line 186 Hidden instructions were detected in comments or invisible text. These could contain malicious directives. Manual review is recommended.Fix: Audit all comments and invisible characters. Remove any instructions that direct the agent to perform unauthorized actions. Use plain, reviewable content.
- 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 | $0.00032 | $0.02275 |
| Opus 5.5 | $0.00013 | $0.00910 |
| Sonnet 5.5 | $0.00006 | $0.00455 |
| Haiku 4.5 | $0.00003 | $0.00228 |
Grade A, and why
creating-wpf-animations 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.
How it starts
The opening of the file, as written. The whole thing — 332 lines — stays where its author put it; the contents beside it link to each section on GitHub.
WPF Animation Patterns
WPF animations create visual effects by changing property values over time.
1. Animation Components
Storyboard (container)
├── Timeline (time control)
│ ├── Animation (value change)
│ │ ├── DoubleAnimation
│ │ ├── ColorAnimation
│ │ └── ...
│ └── AnimationUsingKeyFrames (keyframes)
│ ├── DoubleAnimationUsingKeyFrames
│ └── ...
└── EasingFunction (acceleration/deceleration)
2. Basic Animation (XAML)
2.1 DoubleAnimation
<Button Content="Hover Me" Width="100">
<Button.Style>
<Style TargetType="Button">
<Style.Triggers>
<Trigger Property="IsMouseOver" Value="True">
<Trigger.EnterActions>
<BeginStoryboard>
<Storyboard>
<!-- Width animation -->
<DoubleAnimation
Storyboard.TargetProperty="Width"
To="150"
Duration="0:0:0.3"/>
</Storyboard>
</BeginStoryboard>
</Trigger.EnterActions>
<Trigger.ExitActions>
<BeginStoryboard>
<Storyboard>
<DoubleAnimation
Storyboard.TargetProperty="Width"
To="100"
Duration="0:0:0.3"/>
</Storyboard>
</BeginStoryboard>
</Trigger.ExitActions>
</Trigger>
</Style.Triggers>
</Style>
</Button.Style>
</Button>
2.2 ColorAnimation
<Border x:Name="AnimatedBorder" Background="Blue" Width="100" Height="100">
<Border.Triggers>
<EventTrigger RoutedEvent="MouseEnter">
<BeginStoryboard>
<Storyboard>
<!-- Background color animation -->
<ColorAnimation
Storyboard.TargetProperty="(Border.Background).(SolidColorBrush.Color)"
To="Red"
Duration="0:0:0.5"/>
</Storyboard>
</BeginStoryboard>
</EventTrigger>
<EventTrigger RoutedEvent="MouseLeave">
<BeginStoryboard>
<Storyboard>
<ColorAnimation
Storyboard.TargetProperty="(Border.Background).(SolidColorBrush.Color)"
To="Blue"
Duration="0:0:0.5"/>
</Storyboard>
</BeginStoryboard>
</EventTrigger>
</Border.Triggers>
</Border>
What ships with it
1 file 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.
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.
- 2mo ago First seen · 332 lines · 32 tokens per session scan A abe66cbea3ee
creating-wpf-animations is a skill published in the GitHub repository christian289/dotnet-with-claudecode (41 stars, last pushed 3mo ago), licensed MIT. It adds 32 tokens to every session and 2,275 once invoked, about $0.0001 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 2026-08-30.
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