property-mutation-testing-expert SKILL.md skillA
property-mutation-testing-expert from roedyrustam/vibes-plug is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add roedyrustam/vibes-plug/property-mutation-testing-expert@v4.2.0Pins v4.2.0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- roedyrustam/vibes-plug
- Path
skills/property-mutation-testing-expert/SKILL.md- Versions recorded
- 2
- Latest version
- v4.2.0, committed Oct 3, 2026
- First version recorded
- Oct 3, 2026
- Size
- 12,526 bytes
- Repository stars
- 122
- License
- MIT
Expert guide for property-based testing (fast-check, Hypothesis) and mutation testing (Stryker, mutmut) — AI-generated test properties, invariant discovery, mutation score optimization, and test suite quality verification / Panduan ahli property-based testing (fast-check, Hypothesis) dan mutation testing (Stryker, mutmut) — properti tes yang dihasilkan AI, penemuan invarian, optimasi skor mutasi, dan verifikasi kualitas suite tes.
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
# property-mutation-testing-expert — vibes-plug Skill [English](#english) | [Bahasa Indonesia](#bahasa-indonesia) --- <a name="english"></a> ## English ### Orchestration & Integration Connects and orchestrates with `e2e-testing-expert`, `autonomous-tdd-debugger`, `ai-code-review-autonomous`, `formal-spec-z3-verifier`, `anti-slop`, `typescript-expert`, `python-programming-expert`, and `production-ready-hardener` to enforce mathematically rigorous test quality across the entire codebase. ### Description Production guide for two advanced testing techniques that frontier AI models unlock at unprecedented scale: (1) Property-Based Testing — generating thousands of randomized test inputs guided by algebraic properties and invariants, catching edge cases that example-based tests miss; and (2) Mutation Testing — systematically introducing bugs into the codebase and verifying that the test suite catches every one of them, measuring the actual "kill rate" of your tests. Together, these techniques expose false confidence in code coverage percentages. ### Trigger Conditions Activate this skill when: …
Read the whole file at its exact version.
How to install
mdr add roedyrustam/vibes-plug/property-mutation-testing-expert@sha256:323308aacf79d63eThe line at the top of this page pins the label v4.2.0, 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_nkcig4numaeuc47h)
5 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, all committed on Oct 3, 2026.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| v4.2.0 latest | 2026-10-03 | d8cca2a | 12,526 B | A | view · diff |
| v4.1.0 | 2026-10-03 | 47606ed | 12,526 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 (12526 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
roedyrustam/vibes-plug · 122 stars · license MIT · pushed 2026-11-07 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_nkcig4numaeuc47h GET https://markdownregistry.com/api/v1/resolve?ref=roedyrustam/vibes-plug/property-mutation-testing-expert GET https://markdownregistry.com/api/v1/blob/323308aacf79d63e4afde924508f6d4e7ca1777cb977acddfbe119158ccbe5f9
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.
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