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 formatting-culture-aware-datagit 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/formatting-culture-aware-data)<a href="https://agentmods.dev/skills/christian289/dotnet-with-claudecode/formatting-culture-aware-data"><img src="https://agentmods.dev/badge/skills/christian289/dotnet-with-claudecode/formatting-culture-aware-data/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/formatting-culture-aware-data"><img src="https://agentmods.dev/badge/skills/christian289/dotnet-with-claudecode/formatting-culture-aware-data.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 2 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 27 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 | $0.00025 | $0.01677 |
| Opus 5 | $0.00013 | $0.00839 |
| Sonnet 5 | $0.00005 | $0.00335 |
| Haiku 4.5 | $0.00003 | $0.00168 |
Grade A, and why
formatting-culture-aware-data 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 11d 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 — 245 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Culture-Aware Data Formatting in WPF
Format dates, numbers, and currency based on user's culture preferences.
1. Culture Formatting Overview
| Data Type | en-US | ko-KR | de-DE |
|---|---|---|---|
| Date (d) | 1/21/2026 | 2026-01-21 | 21.01.2026 |
| Currency (C) | $1,234.56 | ₩1,235 | 1.234,56 € |
| Number (N2) | 1,234.56 | 1,234.56 | 1.234,56 |
| Percent (P) | 75.00% | 75.00% | 75,00 % |
2. XAML Formatting
2.1 Date Formatting
<!-- Short date (culture-aware) -->
<TextBlock Text="{Binding Date, StringFormat={}{0:d}}"/>
<!-- Long date -->
<TextBlock Text="{Binding Date, StringFormat={}{0:D}}"/>
<!-- Custom format (not culture-aware) -->
<TextBlock Text="{Binding Date, StringFormat={}{0:yyyy-MM-dd}}"/>
<!-- Date and time -->
<TextBlock Text="{Binding Date, StringFormat={}{0:g}}"/>
2.2 Number Formatting
<!-- Number with 2 decimal places -->
<TextBlock Text="{Binding Amount, StringFormat={}{0:N2}}"/>
<!-- Number with no decimals -->
<TextBlock Text="{Binding Count, StringFormat={}{0:N0}}"/>
<!-- Fixed decimal places -->
<TextBlock Text="{Binding Value, StringFormat={}{0:F2}}"/>
2.3 Currency Formatting
<!-- Currency (culture-aware symbol and format) -->
<TextBlock Text="{Binding Price, StringFormat={}{0:C}}"/>
<!-- Currency with no decimals -->
<TextBlock Text="{Binding Price, StringFormat={}{0:C0}}"/>
2.4 Percent Formatting
<!-- Percent (multiplies by 100) -->
<TextBlock Text="{Binding Rate, StringFormat={}{0:P}}"/>
<!-- Percent with 1 decimal -->
<TextBlock Text="{Binding Rate, StringFormat={}{0:P1}}"/>
3. Code Formatting
3.1 Using Current Culture
// Uses Thread.CurrentThread.CurrentCulture
var dateStr = DateTime.Now.ToString("d");
var currencyStr = price.ToString("C");
var numberStr = amount.ToString("N2");
3.2 Specific Culture
var koKr = new CultureInfo("ko-KR");
var deDE = new CultureInfo("de-DE");
// Korean formatting
var dateKr = DateTime.Now.ToString("d", koKr); // 2026-01-21
var currencyKr = price.ToString("C", koKr); // ₩1,234
// German formatting
var dateDE = DateTime.Now.ToString("d", deDE); // 21.01.2026
var currencyDE = price.ToString("C", deDE); // 1.234,56 €
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.
- 11d ago First seen · 245 lines · 25 tokens per session scan A 21b7080be5a6
formatting-culture-aware-data is a skill published in the GitHub repository christian289/dotnet-with-claudecode (41 stars, last pushed 1mo ago), licensed MIT. It adds 25 tokens to every session and 1,677 once invoked, about $0.0001 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.
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