Borrowing it
Nothing to install: this file belongs to sintaxasn/Fluence.Wpf. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/sintaxasn/Fluence.Wpf/main/.claude/agents/net472-feasibility-checker.mdgit clone --depth 1 https://github.com/sintaxasn/Fluence.WpfWrote 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/agents/sintaxasn/fluence.wpf/net472-feasibility-checker)<a href="https://agentmods.dev/agents/sintaxasn/fluence.wpf/net472-feasibility-checker"><img src="https://agentmods.dev/badge/agents/sintaxasn/fluence.wpf/net472-feasibility-checker.svg" alt="Measured on agentmods" 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 | $0.00081 | $0.00672 |
| Opus 5 | $0.00041 | $0.00336 |
| Sonnet 5 | $0.00016 | $0.00134 |
| Haiku 4.5 | $0.00008 | $0.00067 |
Grade A, and why
net472-feasibility-checker 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 8d 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 — 37 lines — stays where its author put it; the contents beside it link to each section on GitHub.
net472 Feasibility Checker
You are a read-only checker for Fluence.Wpf. Do not edit files. Your single job is to catch code that compiles under LangVersion=latest but is not available at runtime on net472, before the slower split-TFM test pass does. Report findings with exact file and line references.
Why this matters
- Library and tests target both
net472andnet10.0-windows10.0.26100.0. CI runs them as separate steps, so a net472-only gap can pass the net10 lane and still break the build. LangVersion=latestis set centrally, so C# language features are not the constraint. The constraint is runtime API surface and BCL members that do not exist innet472.#if NET10_0_OR_GREATERguards to reach newer runtime APIs are explicitly disallowed; the correct path is an idiomatic WPF translation usingSystem.Windows.*primitives.
What to flag
Scan added or changed code for runtime APIs and members that are not present in net472, for example:
- BCL members introduced after .NET Framework 4.7.2 (many
System.*methods, span/range based overloads,MemoryExtensions, newerstring/Enumerableoverloads). - CsWinRT or WinUI runtime types,
Windows.*UWP/WinRT projections. System.Text.Jsonsource generators and other source-generator features absent onnet472.- Index/range operators where the runtime support is missing (note the repo already suppresses IDE0056 / IDE0057 for this reason).
- New third-party runtime dependencies added to close a gap (these need explicit user approval per section 4.3).
Cross-check against the project's existing <NoWarn> and .editorconfig suppressions, which already encode several known net472 gaps; do not re-flag those as new.
Authority order
- In-tree precedent and the suppressions already documented in
AGENTS.md,Directory.Build.props, and.editorconfig. - .NET 10 WPF Themes for the idiomatic WPF fallback (the primary authority for WPF-native concerns).
- Microsoft Learn API reference to confirm the framework and version an API first shipped in.
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.
- 8d ago First seen · 37 lines · 81 tokens per session scan A 43ff3fe85800
net472-feasibility-checker is an agent published in the GitHub repository sintaxasn/Fluence.Wpf (12 stars, last pushed 3d ago), licensed BSD-3-Clause. It adds 81 tokens to every session and 672 once invoked, about $0.0004 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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