dual-testing SKILL.md skillA
dual-testing from mryll/skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add mryll/skills/dual-testing@v1.1.0Pins v1.1.0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- mryll/skills
- Path
skills/dual-testing/SKILL.md- Versions recorded
- 4
- Latest version
- v1.1.0, committed Jun 4, 2026
- First version recorded
- Apr 20, 2026
- Size
- 10,888 bytes
- Repository stars
- 9
- License
- MIT
Language-agnostic strategy for testing code at the boundary with external infrastructure (databases, APIs, queues): integration tests with real infrastructure (e.g. Testcontainers) prove the full chain works for happy paths; unit/slice tests with mocks prove error-handling and mapping logic (domain error to status, input validation, infra failure). Works in any language/framework — Go, .NET/C#, Java, Python, TypeScript and more — with concrete references for Go, .NET (ASP.NET Core) and Java…
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
# Dual Testing A language-agnostic strategy for code at the boundary between your application and external infrastructure: **integration tests prove the full chain works for happy paths; unit/slice tests prove the error-handling and mapping logic.** It aligns with the Testing Honeycomb / Test Diamond philosophy — boundary code is dominated by interaction complexity, so lean on integration for wiring and on fast mock-based tests for the branchy error logic. The strategy is the same in every language. Only the tooling changes. Concrete per-language references are listed at the bottom; if none matches your language, the **Adapt When No Reference Exists** algorithm tells you how to apply it anyway. ## Definitions - **Integration test** — exercises the real application boundary plus a real external dependency (real database, broker, etc., typically via Testcontainers). Proves the wiring and the happy-path behavior end to end. …
Read the whole file at its exact version.
How to install
mdr add mryll/skills/dual-testing@sha256:c63da4580f7b261fThe line at the top of this page pins the label v1.1.0, 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_kcnvhb2eviv7suru)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 4 versions of this file, between Apr 20, 2026 and Jun 4, 2026, about one every 15 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| v1.1.0 latest | 2026-06-04 | f65156e | 10,888 B | A | view · diff |
| v1.0.2 | 2026-06-01 | 64425a4 | 10,291 B | A | view · diff |
| v1.0.1 | 2026-05-07 | 6ac915e | 10,250 B | A | view · diff |
| v1.0.0 | 2026-04-20 | 3c6942c | 10,250 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 (10888 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
mryll/skills · 9 stars · license MIT · pushed 2026-10-16 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_kcnvhb2eviv7suru GET https://markdownregistry.com/api/v1/resolve?ref=mryll/skills/dual-testing GET https://markdownregistry.com/api/v1/blob/c63da4580f7b261f8e10234abe68e39172da7bb4d4f927fb0c637b138428ea53
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.