What is designing-avalonia-customcontrol-architecture?

A guide for structuring custom controls in Avalonia UI, a .NET framework for building desktop applications. It explains where control code and visual themes belong and how theme resources are connected.

Use it when creating Avalonia custom-control libraries or designing reusable controls with AXAML themes.

It helps keep a custom control’s behavior separate from its appearance and avoids misplaced or inconsistent style files.

How christian289/dotnet-with-claudecode configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to christian289/dotnet-with-claudecode. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/christian289/dotnet-with-claudecode/main/.claude/skills/designing-avalonia-customcontrol-architecture/SKILL.md

Clone the repo

git clone --depth 1 https://github.com/christian289/dotnet-with-claudecode

Made for: Claude Code.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/christian289/dotnet-with-claudecode/designing-avalonia-customcontrol-architecture/github.svg)](https://agentmods.dev/skills/christian289/dotnet-with-claudecode/designing-avalonia-customcontrol-architecture)

Your own site

<a href="https://agentmods.dev/skills/christian289/dotnet-with-claudecode/designing-avalonia-customcontrol-architecture"><img src="https://agentmods.dev/badge/skills/christian289/dotnet-with-claudecode/designing-avalonia-customcontrol-architecture/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/christian289/dotnet-with-claudecode/designing-avalonia-customcontrol-architecture"><img src="https://agentmods.dev/badge/skills/christian289/dotnet-with-claudecode/designing-avalonia-customcontrol-architecture.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 43 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 598 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

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	$0.00043	$0.00598
Opus 5	$0.00022	$0.00299
Sonnet 5	$0.00009	$0.00120
Haiku 4.5	$0.00004	$0.00060

Measured 12d ago against content hash 4a236aba499b, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

designing-avalonia-customcontrol-architecture 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 12d 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.

.claude/skills/designing-avalonia-customcontrol-architecture/SKILL.md · 61 lines

How it starts

The opening of the file, as written. The whole thing — 61 lines — stays where its author put it; the contents beside it link to each section on GitHub.

6.5 Writing AXAML Code

When generating AXAML code, use CustomControl with ControlTheme for Stand-Alone Control Style
Purpose: Theme separation and minimizing style dependencies

6.5.1 AvaloniaUI Custom Control Library Project Structure

Recommended Project Structure:

YourAvaloniaSolution
├── YourCustomControlProject1/
│    ├── Properties/
│    │   ├── AssemblyInfo.cs            ← AssemblyInfo.cs definition
│    ├── Themes/
│    │   ├── Generic.axaml            ← ControlTheme definition
│    │   ├── CustomButton1.axaml       ← Individual control theme
│    │   └── CustomTextBox1.axaml      ← Individual control theme
│    ├── CustomButton1.cs
│    └── CustomTextBox1.cs
└── YourCustomControlProject2/
    ├── Properties/
    │   ├── AssemblyInfo.cs            ← AssemblyInfo.cs definition
    ├── Themes/
    │   ├── Generic.axaml            ← ControlTheme definition
    │   ├── CustomButton2.axaml       ← Individual control theme
    │   └── CustomTextBox2.axaml      ← Individual control theme
    ├── CustomButton2.cs
    └── CustomTextBox2.cs

6.6 ⚠️ Distinguishing ResourceInclude vs MergeResourceInclude

ResourceInclude: Used in regular ResourceDictionary files (Generic.axaml, Styles, etc.)
MergeResourceInclude: Used only in Application.Resources (App.axaml)

Advantages:

Complete separation of theme and logic based on ControlTheme
Flexible style variations through CSS Classes
State management via Pseudo Classes (:pointerover, :pressed, etc.)
Theme modularization through ResourceInclude
Work can be split by file for team collaboration

6.5.2 Key Differences Between WPF and AvaloniaUI

Item	WPF	AvaloniaUI
File Extension	.xaml	.axaml
Style Definition	Style + ControlTemplate	ControlTheme
State Management	Trigger, DataTrigger	Pseudo Classes, Style Selector
CSS Support	❌	✅ (Classes attribute)
Resource Merging	MergedDictionaries + ResourceDictionary	MergedDictionaries + ResourceInclude
Dependency Props	DependencyProperty	StyledProperty, DirectProperty

Read the full file on GitHub · 61 lines

Files

What ships with it

14 files 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.

Changes

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.

12d ago First seen · 61 lines · 43 tokens per session scan A 4a236aba499b

Subscribe to this mod's changes

designing-avalonia-customcontrol-architecture is a skill published in the GitHub repository christian289/dotnet-with-claudecode (41 stars, last pushed 1mo ago), licensed MIT. It adds 43 tokens to every session and 598 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.

Claude Code Planning Web3 and blockchain dotnet wpf

system-text-json-net11

Imperative guidance for the System.Text.Json APIs added in .NET 11: the built-in JsonNamingPolicy.PascalCase naming policy, and the strongly-typed JsonSerializerOptions.GetTypeInfo () and JsonSerializerOptions.TryGetTypeInfo (out JsonTypeInfo ? info) metadata accessors. USE ONLY when the user is targeting net11.0 or…

managedcode/dotnet-skills · 178 tokens

lightningcad

Use when doing architectural facade panel layout and detailing in AutoCAD or ZWCAD — panel numbering, shop drawing generation, material optimization. LightningCAD: building envelope detailing plugin for AutoCAD/ZWCAD.

znlgis/opengis-skills · 45 tokens

reogrid

Use when embedding an Excel-like spreadsheet control in .NET WinForms/WPF applications — formula engine, cell editing, clipboard, undo/redo. ReoGrid: .NET spreadsheet component with NPOI-based Excel read/write.

znlgis/opengis-skills · 50 tokens

mapsui

Use when embedding interactive 2D maps in .NET desktop (WinForms/WPF) or mobile (MAUI) applications — tile layers, vector features, map controls. Mapsui: cross-platform .NET map component library.

znlgis/opengis-skills · 49 tokens

vela

Compiler-exact code search for .NET solutions - find where a symbol is defined, every reference to it, who calls it, and what a change would break. Covers C#, VB, Razor Pages, MVC views and Blazor components, which grep and every other code-intelligence tool miss. Deterministic, built on Roslyn, never modifies the…

dbhq-uk/vela-skill · 164 tokens

dotnet-analyzer-code-intelligence

Navigate and understand C# code through symbol queries, type hierarchies, call graphs, and semantic analysis using Roslyn-powered MCP tools. Use when the user asks to find references, go to definition, understand type inheritance, explore call hierarchies, get symbol info, analyze code metrics, or traverse syntax…

CartapenaBark/DotNetAnalyzer · 226 tokens

dotnet-with-claudecode: Skill for Claude Code