vitest

vitest is a command for coding agents from el-feo/ai-context. It costs 14 tokens per session (140 once invoked), scanned A, original, MIT.

A command for setting up Vitest, a JavaScript and TypeScript testing framework, or moving an existing Jest project to it.

In plain words
What is it for?
Use it to migrate tests from Jest to Vitest or configure Vitest in a project.
Why use it?
It provides guidance for changing testing tools or starting with Vitest without working out the configuration and migration steps alone.

Command

Part of the js-ts plugin — 3 skills, 1 command shipped together

Install

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.

agentmods
npx agentmods add commands/el-feo/ai-context/vitest
Clone the repo
git clone --depth 1 https://github.com/el-feo/ai-context

Or install js-ts, the plugin that ships this one along with the rest of its 3 skills, 1 command.

Wrote 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.

agentmods badge for vitest

README.md
[![agentmods](https://agentmods.dev/badge/commands/el-feo/ai-context/vitest.svg)](https://agentmods.dev/commands/el-feo/ai-context/vitest)
Your own site
<a href="https://agentmods.dev/commands/el-feo/ai-context/vitest"><img src="https://agentmods.dev/badge/commands/el-feo/ai-context/vitest.svg" alt="Measured on agentmods" height="20"></a>
Per session 14 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 140 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5 $0.00014 $0.00140
Opus 5 $0.00007 $0.00070
Sonnet 5 $0.00003 $0.00028
Haiku 4.5 $0.00001 $0.00014

Measured 4d ago against content hash b0e8e7cb3d91, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

vitest 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 4d 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.

plugins/js-ts/commands/vitest.md · 23 lines

What it actually says

This routes to specialized skill containing migration tools, configuration patterns, and troubleshooting guides.

<success_criteria>

  • Skill successfully invoked
  • Arguments passed correctly to skill </success_criteria>
Changes

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.

  1. 4d ago First seen · 23 lines · 14 tokens per session scan A b0e8e7cb3d91

Subscribe to this mod's changes

vitest is a command published in the GitHub repository el-feo/ai-context (12 stars, last pushed 1mo ago), licensed MIT. It adds 14 tokens to every session and 140 once invoked, about $0.0001 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.