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XerahS: Skill for Claude Code

.ai/skills/avalonia-guidelines/SKILL.md

avalonia-guidelines is a skill for Claude Code, Codex from ShareX/XerahS. It costs 39 tokens per session (735 once invoked), scanned A, original, GPL-3.0.

A reference for building user interfaces with the Avalonia framework, including XAML, controls, data binding, MVVM, styling, layout, and navigation. MVVM is a way to separate screen presentation from application logic.

In plain words
What is it for?
Use it when creating Avalonia screens, connecting them to data, building reusable controls, or designing layouts that adapt to different sizes.
Why use it?
It helps developers find consistent ways to structure and style Avalonia interfaces.

Skill for Claude CodeCodex

Which agent this was written for is unclear — body not stored (licence); the path alone says nothing.

This is ShareX/XerahS's own configuration. It tells Claude Code and Codex how to work on XerahS itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything XerahS configures →

not rated 347repo +5 changed 5d ago A scan SkillSpector: warn 39 tokens GPL-3.0
View source ↗ ShareX/XerahS xerahs.com
Reuse

Borrowing it

Nothing to install: this file belongs to ShareX/XerahS. 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/ShareX/XerahS/develop/.ai/skills/avalonia-guidelines/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/ShareX/XerahS

Made for: Claude Code, Codex.

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.

agentmods badge for avalonia-guidelines

README.md
[![agentmods](https://agentmods.dev/badge/skills/sharex/xerahs/avalonia-guidelines/github.svg)](https://agentmods.dev/skills/sharex/xerahs/avalonia-guidelines)
Your own site
<a href="https://agentmods.dev/skills/sharex/xerahs/avalonia-guidelines"><img src="https://agentmods.dev/badge/skills/sharex/xerahs/avalonia-guidelines/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.

agentmods 80×15 button for avalonia-guidelines

Your own site · 80×15
<a href="https://agentmods.dev/skills/sharex/xerahs/avalonia-guidelines"><img src="https://agentmods.dev/badge/skills/sharex/xerahs/avalonia-guidelines.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 39 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 735 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. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 8 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 73
    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 215
    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 261
    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 623
    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 787
    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 967
    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 1036
    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 MCP Rug Pull · line 221
    npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.
    Fix: Pin the version: npx @scope/[email protected]
How audits are shown
Origin unknown 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00039 $0.00735
Opus 5.5 $0.00016 $0.00294
Sonnet 5.5 $0.00008 $0.00147
Haiku 4.5 $0.00004 $0.00073

Measured 5d ago against content hash a86a2da91cdf, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

avalonia-guidelines 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 5d 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.

.ai/skills/avalonia-guidelines/SKILL.md · 61 lines

The source is not reproduced here

Licensed GPL-3.0

The repository is licensed GPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

Read it on GitHub

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.

  1. 5d ago Changed · -1,318 lines · +13 tokens per session a86a2da91cdf
  2. 2mo ago Changed · -46 tokens per session c7683630d3ee
  3. 2mo ago First seen · 1,379 lines · 72 tokens per session scan A bc5e771177d8

Subscribe to this mod's changes

avalonia-guidelines is a skill published in the GitHub repository ShareX/XerahS (347 stars, last pushed 2d ago), licensed GPL-3.0. It adds 39 tokens to every session and 735 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.

Design and UXFrontendavaloniasharexxerahs
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