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Yamlet Tester

Category: General  ·  Sub-category: general-misc  ·  Last updated:
Projects a directory of EARS specs (.yamlet.yaml) into a Gherkin `.feature` tree with `yamlet tests`, force-regenerating the whole tree every run so it can never drift from the specs. REQUIRES one argument — the specs source directory (e.g. `/yamlet-tester specs`); an optional second argument is the target directory, defaulting to `<src>/tests`. Use as the closing step after a spec is authored/verified, or whenever specs change, to refresh the feature files. It is a DISCONNECTED projection: TARGET is yamlet-owned and wiped+rebuilt every run, holding `.feature` files only; the skill NEVER creates, edits, or deletes step definitions (which belong in the consumer's own directory) — it merely flags where they need attention. If no source directory is supplied it returns a usage error and does nothing.
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From the source SKILL.md

Regenerates the Gherkin .feature tree for a directory of specs. This skill only projects — it turns acceptance criteria into feature files and stops at that boundary. Step definitions, fixtures, the runner and CI belong to whoever consumes them; you never touch them.

What this skill does

Yamlet Tester is a community-contributed Claude Code skill in the general-misc sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/yamlet-tester/ and loads when your prompt matches the skill's trigger.

Who uses this skill

The Yamlet Tester Claude Code skill is built for Claude Code users and developers across all disciplines looking for general-purpose AI assistance. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 196,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/yamlet-tester
curl -L https://claudskills.com/skills/yamlet-tester/SKILL.md \
  -o ~/.claude/skills/yamlet-tester/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/yamlet-tester/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/yamlet-tester/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\yamlet-tester\SKILL.md on Windows. See the full install guide for step-by-step instructions.

Telegram

📱 Install from your phone or desktop Telegram

Open @claudskills_bot on Telegram, tap Open Desktop App, and the desktop app installs this skill for you. Or share the bot link with a colleague — they get the same one-tap install. Learn more →

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

Pro

For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.

See pricing → Download desktop app

Frequently asked questions

How do I install the Yamlet Tester Claude Code skill?
Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/yamlet-tester/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.
What does the Yamlet Tester skill do?
Projects a directory of EARS specs (.yamlet.yaml) into a Gherkin `.feature` tree with `yamlet tests`, force-regenerating the whole tree every run so it can never drift from the specs. REQUIRES one argument — the specs source directory (e.g. `/yamlet-tester specs`); an optional second argument is the target directory, defaulting to `<src>/tests`. Use as the closing step after a spec is authored/verified, or whenever specs change, to refresh the feature files. It is a DISCONNECTED projection: TARGET is yamlet-owned and wiped+rebuilt every run, holding `.feature` files only; the skill NEVER creates, edits, or deletes step definitions (which belong in the consumer's own directory) — it merely flags where they need attention. If no source directory is supplied it returns a usage error and does nothing.
Is this skill free to install?
Yes. ClaudSkills is an open registry — every skill keeps its source repository's license, and manual install via copy is free. ClaudSkills Pro ($9/mo, $79/yr, or $149 one-time) adds one-click install via the desktop app and a multi-signal Quality Score.
When should I use the Yamlet Tester skill?
Use Yamlet Tester when your Claude Code task falls under the General category — specifically in the general misc area. Claude Code auto-discovers installed skills and invokes the right one based on the task description, so you can also ask Claude directly (e.g. "use Yamlet Tester" or describe the task and let Claude pick). Browse related skills at /category/general/.
What is a Claude Code skill and how does the Yamlet Tester skill fit in?
A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Yamlet Tester is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the General category. Learn more at /learn/what-is-a-claude-skill/.

Attribution & license

Cite this skill

If you reference this skill in a blog post, paper, or documentation, you can cite it as:

APA
RicardoMonteiroSimoes. (2026). Yamlet Tester [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/yamlet-tester/
BibTeX
@misc{yamlet-tester-2026,
  author    = {RicardoMonteiroSimoes},
  title     = {Yamlet Tester [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/yamlet-tester/}
}

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Grade A · scanned 2026-09-28 — free static scan against the OWASP Agentic Skills Top 10.

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