Executor is a shared integration layer that lets AI agents use tools from MCP servers, OpenAPI specifications, GraphQL APIs, and custom JavaScript functions through one catalog. It centralizes credentials and per-tool access policies so MCP-compatible agents can reuse the same integrations.
Borrowing it
Nothing to install: this file belongs to UsefulSoftwareCo/executor. 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/UsefulSoftwareCo/executor/main/.agents/skills/wrdn-effect-vitest-tests/SKILL.mdgit clone --depth 1 https://github.com/UsefulSoftwareCo/executorWrote 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/usefulsoftwareco/executor/wrdn-effect-vitest-tests)<a href="https://agentmods.dev/skills/usefulsoftwareco/executor/wrdn-effect-vitest-tests"><img src="https://agentmods.dev/badge/skills/usefulsoftwareco/executor/wrdn-effect-vitest-tests/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/usefulsoftwareco/executor/wrdn-effect-vitest-tests"><img src="https://agentmods.dev/badge/skills/usefulsoftwareco/executor/wrdn-effect-vitest-tests.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 | $0.00029 | $0.00200 |
| Opus 5.5 | $0.00012 | $0.00080 |
| Sonnet 5.5 | $0.00006 | $0.00040 |
| Haiku 4.5 | $0.00003 | $0.00020 |
Grade A, and why
wrdn-effect-vitest-tests 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 2mo 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.
Copies of this mod
1 near-identical copy found in the catalogue:
- wrdn-effect-vitest-tests — 100% identical, 0 lines differ
What it actually says
Use @effect/vitest for tests in this repo.
Fix Shape
- Import
describe,it,expect, and helpers from@effect/vitest. - Import utility helpers from
@effect/vitest/utilswhen needed. - Do not import from raw
vitestexcept in config or tooling files. - Do not put
expect(...)behindif, ternary, logical, or switch branches. - Split conditional behavior into separate tests, or assert the branch condition and expected value explicitly.
Bad
if (result.ok) {
expect(result.value).toBe("x");
}
Good
expect(result).toEqual({ ok: true, value: "x" });
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.
- 2mo ago First seen · 30 lines · 29 tokens per session scan A d3835d20da79
wrdn-effect-vitest-tests is a skill published in the GitHub repository UsefulSoftwareCo/executor (4,297 stars, last pushed today), licensed MIT. It adds 29 tokens to every session and 200 once invoked, about $0.0001 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 2026-08-30.
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