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 agentmods add skills/vchelaru/flatredball2/animation-editor-testingnpx skills add vchelaru/FlatRedBall2 --skill animation-editor-testinggit 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/animation-editor-testing)<a href="https://agentmods.dev/skills/vchelaru/flatredball2/animation-editor-testing"><img src="https://agentmods.dev/badge/skills/vchelaru/flatredball2/animation-editor-testing.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 | $0.00043 | $0.02998 |
| Opus 5 | $0.00022 | $0.01499 |
| Sonnet 5 | $0.00009 | $0.00600 |
| Haiku 4.5 | $0.00004 | $0.00300 |
Grade A, and why
animation-editor-testing 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 — 86 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Animation Editor — Testing
Headless-test discipline for the Avalonia Animation Editor. Tool layout lives in the animation-editor skill. Browser/WASM smoke lives in animation-editor-browser-verify (do not mirror Core/App suites there).
dotnet test tools/AnimationEditorAvalonia/tests/AnimationEditor.Core.Tests/
dotnet test tools/AnimationEditorAvalonia/tests/AnimationEditor.Views.Tests/
dotnet test tools/AnimationEditorAvalonia/tests/AnimationEditor.App.Tests/
Pick the right layer (do not duplicate)
| Layer | Project | Use when | Do not use for |
|---|---|---|---|
| Core | AnimationEditor.Core.Tests |
Commands, undo Descriptions, selection/state, pure logic |
Layout, pointer routing, pixels |
| Headless control | AnimationEditor.Views.Tests ([AvaloniaFact]) |
A single AnimationEditor.Views control in isolation (e.g. ProjectPanelControl), using FakeFolder/FakeFile doubles — no MainWindow/DI |
Cross-control wiring, MainWindow integration, real service graph |
| Headless integration | AnimationEditor.App.Tests ([AvaloniaFact], TestServices) |
Desktop visual tree through MainWindow, input routing, real DI-wired services — the bug involves wiring, not just one control |
Re-proving Core math or a single control's own logic; Browser/WASM |
| Browser smoke | AnimationEditor.Browser.Ui (Playwright) |
Browser-only gaps (WASM boot, Browser host wiring, Debug automation bridge). See that folder’s README | Cloning Core/App/Views tests; primary label gate |
Default: Core [Fact]. Reach for [AvaloniaFact] only when the behavior under test genuinely is UI. Reach for Browser Playwright only when Headless/desktop cannot catch it — a small smoke set, not a 1:1 port.
[AvaloniaFact] is a last resort
[AvaloniaFact] (from Avalonia.Headless.XUnit) runs the test on a headless Avalonia UI thread. It is slow and deadlocks on anything that blocks the UI thread waiting for the UI — a code path reaching Window.ShowDialog hangs forever with nothing to close the dialog. The MainWindow constructor also overwrites injected delegates (AppCommands.ConfirmAsync, PromptStringAsync, FileDialogService), so a stub installed before construction is silently lost.
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 First seen · 86 lines · 43 tokens per session scan A 5048f7c1c0be
animation-editor-testing is a skill published in the GitHub repository vchelaru/FlatRedBall2 (14 stars, last pushed yesterday), licensed MIT. It adds 43 tokens to every session and 2,998 once invoked, about $0.0002 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 2026-09-04.
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