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 make-wpf-chatclientgit 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/make-wpf-chatclient)<a href="https://agentmods.dev/skills/christian289/dotnet-with-claudecode/make-wpf-chatclient"><img src="https://agentmods.dev/badge/skills/christian289/dotnet-with-claudecode/make-wpf-chatclient/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/make-wpf-chatclient"><img src="https://agentmods.dev/badge/skills/christian289/dotnet-with-claudecode/make-wpf-chatclient.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 | $0.00097 | $0.05080 |
| Opus 5.5 | $0.00039 | $0.02032 |
| Sonnet 5.5 | $0.00019 | $0.01016 |
| Haiku 4.5 | $0.00010 | $0.00508 |
Grade C, and why
make-wpf-chatclient scanned grade C with 1 finding 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.
Hidden instructionshighPrompt injection
Directives inside HTML comments, invisible characters or bidirectional overrides are read by the model and not by the person reviewing the file.
<!-- Input: Enter=send, Shift+Enter=newline --> How it starts
The opening of the file, as written. The whole thing — 505 lines — stays where its author put it; the contents beside it link to each section on GitHub.
WPF Chat Client Generator (one-button)
If $0 is empty, use the AskUserQuestion tool to ask: "Enter the chat feature name (e.g., Chat, Assistant, Copilot)". Do NOT proceed until a valid name is provided. Use the response as the feature name for all subsequent steps.
This is the self-contained, one-button scaffolder: a single invocation emits an entire working streaming chat client and wires it into the app via ViewModel First (Mappings.xaml + DI). It composes the four component scaffolders and adds the glue (input behavior, auto-scroll behavior, view, view-model, DI) they don't cover. It defaults to a mock provider with no MCP, so the generated app builds and streams a reply with no API key and no server.
- Replace
{Namespace}with the project's root namespace,{Project}with the*.WpfApppath, and{ViewModels}with the*.ViewModelsproject. - Target app must be a
make-wpf-projectsolution (.WpfApp+.ViewModels), CommunityToolkit.Mvvm + GenericHost. (Prism users: substituteBindableBase/DelegateCommand/RegisterForNavigationperview-viewmodel-wiring-prism.md.)
This skill is the one-button equivalent of running, in one pass,
make-wpf-markdown-presenter+make-wpf-chat-bubble-template+make-wpf-chatclient-factory+make-wpf-chat-orchestrator, plus the view, view-model, and behaviors below. The full rationale for every piece lives in the knowledge topics listed under "Related".
⚠️ Verify SDK signatures with HandMirror before emitting provider/MCP code
The factory and orchestrator call version-sensitive APIs across several SDKs.
Before emitting them, verify signatures with HandMirror
(inspect_nuget_package / inspect_nuget_package_type): Microsoft.Extensions.AI,
ModelContextProtocol, and any real providers you enable (OpenAI, OllamaSharp,
Anthropic.SDK, Google.GenAI, System.ClientModel). The mock path needs none of these.
Workflow
Copy this checklist and emit each file in order:
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 · 505 lines · 97 tokens per session scan C 1ea3beb02d26
make-wpf-chatclient is a skill published in the GitHub repository christian289/dotnet-with-claudecode (41 stars, last pushed 2mo ago), licensed MIT. It adds 97 tokens to every session and 5,080 once invoked, about $0.0004 per session on Opus 5.5. A static security scan graded it C with 1 finding (hidden instructions). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.
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