vitest-dev SKILL.md skillA
vitest-dev from bjornmelin/dev-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add bjornmelin/dev-skills/vitest-dev@v0.1.0Pins v0.1.0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- bjornmelin/dev-skills
- Path
skills/vitest-dev/SKILL.md- Versions recorded
- 3
- Latest version
- v0.1.0, committed Aug 3, 2026
- First version recorded
- Jan 26, 2026
- Size
- 9,159 bytes
- Repository stars
- 8
- License
- none declared
Generic Vitest/TypeScript testing: write or repair tests, triage flakes, tune monorepo config, and reduce local/CI test time.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# vitest-dev A Claude Code skill for producing **high-signal, low-flake, fast** Vitest suites (TypeScript + Next.js 16) and for shaping Vitest configuration for optimal **local DX** and **CI throughput**. ## Core outcomes 1. **Correctness first**: tests encode business behavior (not implementation details). 2. **Deterministic**: no network, no clocks, no global leakage, no order dependencies. 3. **Fast**: - fast feedback locally (watch mode + smart filtering) - scalable CI (parallel workers + sharding + cache + machine-readable reports) 4. **Actionable failures**: failures localize root cause quickly. ## Default operating procedure When asked to add or improve tests: 1. **Map the unit under test** - Identify public API / observable behavior - Identify boundaries: I/O, time, randomness, network, database, filesystem, env, global state 2. **Choose the lightest test that gives confidence** - Pure unit test (no framework/runtime) → preferred - Component test in `jsdom` (React) when DOM behavior is essential - Integration test in Node when multiple modules must cooperate …
Read the whole file at its exact version.
How to install
mdr add bjornmelin/dev-skills/vitest-dev@sha256:f917d64950b558a6The line at the top of this page pins the label v0.1.0, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_wgvsqt2mdb4ns26p)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 3 versions of this file, between Jan 26, 2026 and Aug 3, 2026, about one every 95 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| v0.1.0 latest | 2026-08-03 | 4037041 | 9,159 B | A | view · diff |
| v0.1.0 | 2026-07-28 | 3aaa44b | 9,204 B | A | view · diff |
| v0.1.0 | 2026-01-26 | 735ce96 | 9,125 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (9159 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
bjornmelin/dev-skills · 8 stars · license none declared · pushed 2026-10-27 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_wgvsqt2mdb4ns26p GET https://markdownregistry.com/api/v1/resolve?ref=bjornmelin/dev-skills/vitest-dev GET https://markdownregistry.com/api/v1/blob/f917d64950b558a691829cf3a87e37a56bae43b1f42e1134b7021929b2502c86
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.