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 vchelaru/FlatRedBall2 --skill multiplatform-conversiongit clone --depth 1 https://github.com/vchelaru/FlatRedBall2Wrote 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/vchelaru/flatredball2/multiplatform-conversion)<a href="https://agentmods.dev/skills/vchelaru/flatredball2/multiplatform-conversion"><img src="https://agentmods.dev/badge/skills/vchelaru/flatredball2/multiplatform-conversion/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/vchelaru/flatredball2/multiplatform-conversion"><img src="https://agentmods.dev/badge/skills/vchelaru/flatredball2/multiplatform-conversion.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 | $0.00097 | $0.05899 |
| Opus 5.5 | $0.00039 | $0.02360 |
| Sonnet 5.5 | $0.00019 | $0.01180 |
| Haiku 4.5 | $0.00010 | $0.00590 |
Grade A, and why
multiplatform-conversion 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 yesterday.
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 — 247 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Multi-Platform (Desktop + KNI BlazorGL)
References:
templates/frb2-multiplatform/(minimal — proves the wiring, not the content story) andsamples/PlatformKing/(content-rich — TMX, JSON, PNG animations). Read PlatformKing first when porting any non-trivial game.
One engine, one Common
Both heads run on KNI and reference the same engine (src/FlatRedBall2.csproj / NuGet FlatRedBall2.Kni). There is no backend switch: Game1 and all game code are shared verbatim, and branch at runtime on OperatingSystem.IsBrowser() only where a browser genuinely differs.
Project layout
Projects, mirroring templates/frb2-multiplatform/:
GameName/
GameName.Common/ net10.0 game code + Content/, one csproj, default globbing
GameName.Desktop/ net10.0 Program.cs, KNI SDL2.GL
GameName.BlazorGL/ net10.0 Blazor WASM host
GameName.slnx
The Game subclass (Game1) lives in Common so both heads instantiate the same type. Heads own only their entry points and platform-specific csproj wiring.
Asset placement
Assets belong in Common/Content/ by default. Only move to platform-specific folders if they won't work elsewhere (e.g., platform-specific UI sizes, backend-incompatible shader variants). Most art, audio, and data stay in Common/ so both Desktop and BlazorGL draw from a single source — no duplication.
Common
One GameName.Common.csproj: net10.0, default compile items, the nkast.Xna.Framework* packages the game code uses, and a ProjectReference (or FlatRedBall2.Kni package) to the engine. Both heads reference it. See samples/PlatformKing/PlatformKing.Common/ (minimal) and samples/Solitaire/Solitaire.Common/ (Gum content items).
Desktop head: <KniPlatform>DesktopGL</KniPlatform> plus nkast.Xna.Framework* and nkast.Kni.Platform.SDL2.GL. BlazorGL head: <KniPlatform>BlazorGL</KniPlatform> plus nkast.Kni.Platform.Blazor.GL (below).
Landmine: list every ProjectReference target as its own <Project Path> in the .slnx. Visual Studio's IDE-hosted NuGet restore only walks ProjectReferences among projects that are themselves listed as solution members — a project that exists on disk and is correctly referenced but missing from the .slnx builds fine via dotnet build/CLI msbuild (both walk the full reference closure regardless of solution membership) but fails with NU1105 ("not part of the current solution") the moment someone opens the .slnx in Visual Studio. So list the engine projects (FlatRedBall2.Kni, AnimationChain.Common, and FlatRedBall2.BlazorGL for a BlazorGL head) alongside the game's own. tests/FlatRedBall2.Tests/Packaging/SolutionMembershipTests.cs checks this for every .slnx in this repo; there's no equivalent check for a downstream game project, so verify it by hand when scaffolding one.
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.
- yesterday Changed · -14 lines · -7 tokens per session 025d3461a9ca
- 4d ago Changed · +1 lines fe0022ce2949
- 7d ago Changed · +6 lines 91154f46f545
- 13d ago Changed · +44 lines · +16 tokens per session c64c61dad26f
- 1mo ago Changed · +2 lines b187e2571b5c
- 1mo ago First seen · 208 lines · 88 tokens per session scan A b9b1437e31f0
multiplatform-conversion is a skill published in the GitHub repository vchelaru/FlatRedBall2 (15 stars, last pushed yesterday), licensed MIT. It adds 97 tokens to every session and 5,899 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 2026-09-04.
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