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 linuxdevel/Avalonia-skills --skill avalonia-custom-controlsgit clone --depth 1 https://github.com/linuxdevel/Avalonia-skillsWrote 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/linuxdevel/avalonia-skills/avalonia-custom-controls)<a href="https://agentmods.dev/skills/linuxdevel/avalonia-skills/avalonia-custom-controls"><img src="https://agentmods.dev/badge/skills/linuxdevel/avalonia-skills/avalonia-custom-controls/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/linuxdevel/avalonia-skills/avalonia-custom-controls"><img src="https://agentmods.dev/badge/skills/linuxdevel/avalonia-skills/avalonia-custom-controls.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 | $0.00038 | $0.02086 |
| Opus 5.5 | $0.00015 | $0.00834 |
| Sonnet 5.5 | $0.00008 | $0.00417 |
| Haiku 4.5 | $0.00004 | $0.00209 |
Grade A, and why
avalonia-custom-controls 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 — 235 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Avalonia Custom Controls
Overview
Three control types: UserControl (XAML composition, app-specific), TemplatedControl (lookless, restyled per theme), Control (custom drawing with Render override). Choose by reusability needs.
Choosing a Control Type
| Type | Inherit from | Use when |
|---|---|---|
| UserControl | UserControl |
App-specific view/page, composed of existing controls |
| TemplatedControl | TemplatedControl |
Reusable, restyled control for libraries/themes |
| Basic control | Control |
Custom drawing (charts, gauges, games) |
| Panel | Panel |
Custom layout algorithm |
UserControl
<!-- MyCard.axaml -->
<UserControl xmlns="https://github.com/avaloniaui"
x:Class="MyApp.Controls.MyCard">
<Border CornerRadius="8" Padding="16">
<ContentPresenter Content="{Binding}"/>
</Border>
</UserControl>
// MyCard.axaml.cs
public partial class MyCard : UserControl
{
public MyCard() => InitializeComponent();
}
TemplatedControl
public class RatingControl : TemplatedControl
{
public static readonly StyledProperty<int> ValueProperty =
AvaloniaProperty.Register<RatingControl, int>(nameof(Value), defaultValue: 0);
public int Value
{
get => GetValue(ValueProperty);
set => SetValue(ValueProperty, value);
}
}
Default template in Themes/Generic.axaml:
<ControlTheme x:Key="{x:Type local:RatingControl}" TargetType="local:RatingControl">
<Setter Property="Template">
<ControlTemplate>
<StackPanel Orientation="Horizontal">
<!-- template content -->
</StackPanel>
</ControlTemplate>
</Setter>
</ControlTheme>
StyledProperty vs DirectProperty
| StyledProperty | DirectProperty | |
|---|---|---|
| Styling support | Yes | No |
| Binding | All priorities | LocalValue only |
| Value inheritance | Yes | No |
| Per-instance storage | Prioritized list | Field |
| Use when | Needs styling, most cases | High-perf, won't be styled |
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 Changed · +21 lines d97ac76df57e
- 2mo ago First seen · 214 lines · 38 tokens per session scan A 9c6cca9e6749
avalonia-custom-controls is a skill published in the GitHub repository linuxdevel/Avalonia-skills (48 stars, last pushed 10d ago), licensed MIT. It adds 38 tokens to every session and 2,086 once invoked, about $0.0002 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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