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 configuring-wpf-dev-pack-languagegit 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/configuring-wpf-dev-pack-language)<a href="https://agentmods.dev/skills/christian289/dotnet-with-claudecode/configuring-wpf-dev-pack-language"><img src="https://agentmods.dev/badge/skills/christian289/dotnet-with-claudecode/configuring-wpf-dev-pack-language/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/configuring-wpf-dev-pack-language"><img src="https://agentmods.dev/badge/skills/christian289/dotnet-with-claudecode/configuring-wpf-dev-pack-language.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00088 | $0.01297 |
| Opus 5.5 | $0.00035 | $0.00519 |
| Sonnet 5.5 | $0.00018 | $0.00259 |
| Haiku 4.5 | $0.00009 | $0.00130 |
Grade A, and why
configuring-wpf-dev-pack-language 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 1mo 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 — 133 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Configuring wpf-dev-pack Language
This skill writes (or updates) a per-project preference file that tells
the wpf-dev-pack plugin which language to respond in. A SessionStart
hook (hooks/LanguagePreferenceLoader.cs) reads the file on every new
conversation and emits a directive into the system context, so the
preference takes effect automatically.
When to use
- The default language of a response does not match what the user wants (typical case: an English-speaking contributor in a project where wpf-dev-pack was originally tuned for Korean responses, or vice versa).
- The user wants to switch language mid-project.
When NOT to use
- The user only wants a one-off language switch for the next response — just have them phrase the next message in the target language. Do not write a file for a one-shot.
- The wpf-dev-pack plugin is not installed in the current project — the SessionStart hook will not run without the plugin.
Workflow
Copy this checklist and track progress:
Configure Progress:
- [ ] Step 1: Detect current state of .claude/wpf-dev-pack.local.md
- [ ] Step 2: Resolve target language (argument or AskUserQuestion)
- [ ] Step 3: Write or update .claude/wpf-dev-pack.local.md
- [ ] Step 4: Confirm and explain when the change takes effect
Step 1 — Detect current state
Check whether .claude/wpf-dev-pack.local.md exists in the current
project root. If it does, read its YAML frontmatter and find any
existing language: value so the user can see what they are replacing.
If the file does not exist, that is fine — Step 3 will create it.
Step 2 — Resolve target language
If $0 is provided, treat it as a BCP-47
language code (the IETF standard built on ISO 639 language codes):
$0 value |
Meaning |
|---|---|
ko, ko-KR |
Korean |
en, en-US, en-GB |
English |
ja, ja-JP |
Japanese |
zh, zh-CN, zh-TW |
Chinese |
| (other) | Pass through — the hook will display the raw code |
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.
- 1mo ago First seen · 133 lines · 88 tokens per session scan A 946a06e72ab3
configuring-wpf-dev-pack-language is a skill published in the GitHub repository christian289/dotnet-with-claudecode (41 stars, last pushed 2mo ago), licensed MIT. It adds 88 tokens to every session and 1,297 once invoked, about $0.0004 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 2026-09-03.
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