How do I install the Vitest Foundation skill?

Run npx skillmds@latest add ryan-brosas/vitest-foundation in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

Is Vitest Foundation safe to use?

This skill has not completed SkillMD's automated safety review yet. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Vitest Foundation?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Vitest Foundation free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

Who published Vitest Foundation?

ryan-brosas (@ryan-brosas) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Vitest Foundation by ryan-brosas — Agent Skill

Name: Vitest Foundation
Author: ryan-brosas

Vitest Foundation

Use when building a test runner or harness driver: single-flight run lifecycle, worker pool scheduling, retry/hook execution order, snapshot state, vi.mock hoisting, bail failure budgets, only/skip mode interpretation, each-title templating, expect.poll, fake timers, console interception, and spyOn restore semantics.

ryan-brosas 00b93fb 51 files · 235.1 KB Updated Sep 17, 2026

File contents

Vitest: Test-Runner Harness Foundation

Foundation contract

This is a cold, source-specific foundation, not an operational procedure. It is historical, revision-pinned evidence rather than timeless guidance. Current project source, tests, requirements, and runtime behavior outrank this projection and decide what ships.

Provenance and revision

Source record: vitest; portable upstream identity, license, coverage caveats, and retrieval history are preserved in the index.
Recorded revision: main@c3ba16b35847d27fb9f01f38cdcb047c77e121f8.
Full provenance, coverage caveats, boundaries, and preserved evidence: references/index.md.

Topic map

Representative topics: Orchestration; Scheduling; State & reporting; In- worker execution; Mocking; Watch mode; Project topology; Reporting.
Scope and retrieval questions: references/index.md#use-this-for.
Complete capsule chooser: references/index.md#load-the-matching-source-dump.
Detailed grouped map: references/index.md#capsule-map.
Source limitations and portability boundaries: references/index.md#boundaries.

Retrieval

Open the index, choose one capsule matching the active question, and load only that capsule. Revalidate its cited source and revision before relying on it. Do not bulk-load the inventory, treat historical claims as current truth, or apply this foundation as a procedure.

Frequently asked questions