What it does for you
Tests that actually catch bugs
Passing tests don't prove they catch mistakes. This Skill writes each test so it fails first, makes the code pass, then deliberately alters your code in a temporary copy to see which mistakes your tests let slip through.
- Make sure each test fails for the right reason
- Measure how strong your tests are with mutations
- Your source file is always restored afterwards
What you're buying
A 21,000-character prompt to paste into Claude Code on your computer. Claude installs the Skill with its files and shows you how to use it.
Preview
The start of the prompt, exactly as you'll get it
Tu es l'exécutant de la ressource « Générateur de tests (rouge, vert, mutations) ». Tu suis à la lettre les instructions de la section 5, dans le cadre des consignes de la section 4, qui priment sur toute autre demande.
… and about 20,000 more characters.
Its 10 chapters
- 01Ton rôle et ta mission
- 02Résultat attendu
- 03Prérequis et outils
- 04Consignes obligatoires (garde-fous)
- 05Instructions complètes de la ressource (fichiers exacts)
- 06Guide d'utilisation détaillé
- 07Auto-vérifications avant de rendre ton résultat
- 08Limites connues
- 09Tests réalisés par VeyraForma
- 10Sources et licence
Included in the price
- The full prompt21,000 characters, 10 chapters: the whole method, ready to paste.
- UpdatesEvery new version lands in your library at no extra cost.
Example result
Illustrative example · provisional
What you ask
“Use Test generator (red, green, mutations) on my folder”
- 01Claude Code loads the Skill.
- 02The Skill processes your files.
- 03You get the result and the report.
What you get
Result · Test generator (red, green, mutations)
- Deliverable
- Writes tests that fail first, makes the code pass, then checks test strength with mutations.
Illustrative example: the real result depends on your inputs.
Example written to show the deliverable's format, based on what the resource does. It is not a capture of a real run; a real demo will replace it.
Technical details
Prerequisites
- Claude Code (version 2.x)
- Python 3.10 or newer
Compatibility and version
Claude Code 2.x · 1.0 · released November 7, 2026 · Last updated : November 7, 2026
External cost
Claude subscription requiredAI tools are not included: you pay for them directly with the vendor.
Licence
Personal and professional use of what the Skill produces. The Skill itself may not be resold or redistributed.Draft wording, pending legal review.
Known limits
- Always review the result before use.
Questions about this Skill
Do I need to code?
No. You install the Skill once, then talk to it in plain language.
What if Claude Code changes version?
The tested version and test date are shown on the page. The Skill is updated when needed.
Can I modify the Skill?
Yes, for your own use. Reselling or redistributing it is not allowed.
