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-xamlgit 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-xaml)<a href="https://agentmods.dev/skills/linuxdevel/avalonia-skills/avalonia-xaml"><img src="https://agentmods.dev/badge/skills/linuxdevel/avalonia-skills/avalonia-xaml/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-xaml"><img src="https://agentmods.dev/badge/skills/linuxdevel/avalonia-skills/avalonia-xaml.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 | $0.00040 | $0.01957 |
| Opus 5.5 | $0.00016 | $0.00783 |
| Sonnet 5.5 | $0.00008 | $0.00391 |
| Haiku 4.5 | $0.00004 | $0.00196 |
Grade A, and why
avalonia-xaml 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 — 211 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Avalonia XAML
Overview
Avalonia uses .axaml extension (not .xaml) to avoid Visual Studio WPF tooling conflicts. XAML is optional; full code-only UI is supported. (12.0+) compiled bindings are ON by default (AvaloniaUseCompiledBindingsByDefault=true): {Binding} maps to CompiledBinding, so x:DataType is required wherever bindings are used. In 11.x compiled bindings are opt-in ({CompiledBinding} / x:CompileBindings="True"). Escape hatch: {ReflectionBinding Path} or x:CompileBindings="False".
File Structure
Every .axaml file requires the Avalonia root namespace and language namespace:
<Window xmlns="https://github.com/avaloniaui"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:vm="using:MyApp.ViewModels"
x:Class="MyApp.MainWindow"
x:DataType="vm:MainWindowViewModel"
Title="My App"
Width="800" Height="450">
<TextBlock Text="{Binding Greeting}" />
</Window>
Corresponding code-behind:
// MainWindow.axaml.cs
using Avalonia.Controls;
namespace MyApp;
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
}
}
XML Namespaces
Namespace Syntax
| Syntax | Use case | Example |
|---|---|---|
using: |
Same solution assemblies (preferred) | xmlns:vm="using:MyApp.ViewModels" |
clr-namespace: |
External assemblies (requires ;assembly=) |
xmlns:ctrl="clr-namespace:MyLib.Controls;assembly=MyLib" |
| URI | Framework namespaces | xmlns="https://github.com/avaloniaui" |
Common Namespaces
| Prefix | URI / Syntax | Purpose |
|---|---|---|
| (default) | https://github.com/avaloniaui |
All Avalonia controls |
x: |
http://schemas.microsoft.com/winfx/2006/xaml |
XAML language features |
vm: |
using:MyApp.ViewModels |
ViewModel types |
conv: |
using:MyApp.Converters |
Converter classes |
sys: |
using:System |
System types (Math, String, etc.) |
Markup Extensions
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 · +13 lines edc28f56dbc9
- 2mo ago First seen · 198 lines · 40 tokens per session scan A 9782cfef0dcc
avalonia-xaml is a skill published in the GitHub repository linuxdevel/Avalonia-skills (48 stars, last pushed 10d ago), licensed MIT. It adds 40 tokens to every session and 1,957 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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