vitest

Vitest fast unit testing framework powered by Vite with Jest-compatible API. Use when writing tests, mocking, configuring coverage, or working with test filtering and fixtures.

Quality

78%

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Securityby

Passed

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tessl review fix ./.agents/skills/vitest/SKILL.md

The canonical home for this skill is vitest in antfu/skills

Quality

Content

71%Weight 40%Scale 1-5

Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.

A well-organized overview skill that excels at progressive disclosure by routing to real reference files via clean tables. Its weakness is actionability in the body itself, which is navigational rather than executable.

Suggestions

Add one short copy-paste starter (e.g. a minimal vitest.config.ts and a sample test) in the body so the skill is actionable without opening a reference.

Trim the "Key Features" bullet list since each item is already represented in the topic tables, reducing redundancy.

Note in the version line how to check the installed Vitest version so the beta/2026-06-22 framing stays actionable.

Dimension	Reasoning	Score
Conciseness	The body is lean with no padding and assumes Claude knows what a testing framework is; the "Key Features" bullets and intro are tight, though they overlap slightly with the table descriptions.	4 / 5
Actionability	The body is an index that navigates to concrete references rather than providing executable code or commands itself; guidance is concrete via links but the body alone lacks copy-paste-ready instruction.	3 / 5
Workflow Clarity	As a single-purpose reference-routing skill it has a clear, unambiguous purpose and well-organized sections, though there is no multi-step process to validate.	4 / 5
Progressive Disclosure	A clear overview with well-signaled one-level-deep references organized into Core/Features/Advanced tables; every referenced path corresponds to a real file in references/, giving easy navigation.	5 / 5
	Total	16 / 20 Passed

Description

85%Weight 40%Scale 1-5

Based on the skill's description, can an agent find and select it at the right time? Clear, specific descriptions lead to better discovery.

A strong description that states both what Vitest is and when to use it, with concrete capability and trigger coverage. Minor specificity gains are possible by adding synonyms like snapshots or Jest migration.

Dimension	Reasoning	Score
Specificity	Names the domain (Vitest/Vite, Jest-compatible API) and lists several concrete capabilities including "writing tests, mocking, configuring coverage," and "test filtering and fixtures," with only minor gaps in coverage.	4 / 5
Completeness	It clearly answers "what" (fast unit testing framework powered by Vite, Jest-compatible API) and explicitly answers "when" with concrete trigger phrases via the "Use when..." clause.	5 / 5
Trigger Term Quality	The "Use when" clause surfaces natural phrases users would say (writing tests, mocking, configuring coverage, test filtering, fixtures), though a few common synonyms like snapshots or Jest migration are missing.	4 / 5
Distinctiveness Conflict Risk	Vitest-specific framing with Vite/Jest-compatible framing carves a clear niche, and the triggers are tied to that niche, minimizing overlap with other testing skills.	5 / 5
	Total	18 / 20 Passed

Validation

100%

Warnings & errors only

Checks the skill against the spec for correct structure and formatting. All validation checks must pass before discovery and implementation can be scored.

Validation — 16 / 16 Passed

Validation for skill structure

No warnings or errors.

Repository: compozy/compozy
Path: .agents/skills/vitest/SKILL.md
Commit: e8df3c2

Reviewed: 1 day ago

Table of Contents

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