Borrowing it
Nothing to install: this file belongs to vchelaru/FlatRedBall2. 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/vchelaru/FlatRedBall2/main/.claude/skills/animation-editor-testing/SKILL.mdgit 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/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/animation-editor-testing"><img src="https://agentmods.dev/badge/skills/vchelaru/flatredball2/animation-editor-testing.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 | $0.00056 | $0.03832 |
| Opus 5.5 | $0.00022 | $0.01533 |
| Sonnet 5.5 | $0.00011 | $0.00766 |
| Haiku 4.5 | $0.00006 | $0.00383 |
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 16d 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 — 112 lines — stays where its author put it; the contents beside it link to each section on GitHub.
AnimationEditor — Testing
Headless-test discipline for the Avalonia AnimationEditor. Tool layout lives in the animation-editor skill.
scripts/test-ae.py # build, then every AE test (~1 min)
scripts/test-ae.py --filter "FullyQualifiedName~Grid" # same, filtered
test-ae.py builds once, runs every test project in parallel with App.Tests split into shards, prints only failures, and exits nonzero on any. It works from any worktree and can run in several worktrees at once: build outputs, temp folders and settings roots are all per worktree or per test.
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 |
| Windows Sandbox | AnimationEditor.Sandbox.Tests |
What only a real install proves: Velopack hooks, registry, file association, uninstall. See below | Anything a headless test can reach |
Default: Core [Fact]. Reach for [AvaloniaFact] only when the behavior under test genuinely is UI.
Windows Sandbox tests run only when asked
dotnet test tools/AnimationEditorAvalonia/tests/AnimationEditor.Sandbox.Tests builds a Velopack Setup.exe (or uses AE_SANDBOX_SETUP_EXE) and runs each scenario in a fresh Windows Sandbox. The project is left out of the .slnx, test-ae.py, and CI on purpose, because a scenario takes minutes; keep it out. Tests skip on machines without Sandbox (Windows Home, or the optional feature off), and fail fast if a sandbox is already open, since Windows allows one at a time.
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.
- 16d ago Changed · +56 tokens per session 31d1c8dfc0b7
- 18d ago Changed · +3 lines · -43 tokens per session cf488dccdded
- 26d ago Changed · +5 lines 64dd40e86512
- 1mo ago Changed · +18 lines de4433240bf7
- 1mo ago Changed 357014b91be6
- 1mo ago Changed 29e3692dc4b1
- 1mo ago First seen · 86 lines · 43 tokens per session scan A 5048f7c1c0be
animation-editor-testing is a skill published in the GitHub repository vchelaru/FlatRedBall2 (15 stars, last pushed today), licensed MIT. It adds 56 tokens to every session and 3,832 once invoked, about $0.0002 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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