generate-testability-wrappers SKILL.md skillA
generate-testability-wrappers from dotnet/skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add dotnet/skills/generate-testability-wrappers@git:20260903.30b30efPins git:20260903.30b30ef in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- dotnet/skills
- Path
plugins/dotnet-test/skills/generate-testability-wrappers/SKILL.md- Versions recorded
- 5
- Latest version
- git:20260903.30b30ef, committed Sep 3, 2026
- First version recorded
- Jul 7, 2026
- Size
- 15,658 bytes
- Repository stars
- 5,836
- License
- MIT
DO NOT USE when the target already consumes an injected interface or built-in abstraction such as IFileSystem or TimeProvider, even if the request says "generate a wrapper"; no new wrapper is needed. Use only when C# source calls an ambient/static dependency and no injectable seam exists: first-time TimeProvider, IHttpClientFactory, or System.IO.Abstractions adoption; minimal Environment/Console/Process wrappers; IProcessRunner; DI registration; or an ambient seam that preserves a static API.…
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
# Generate Testability Wrappers Generate wrapper interfaces, default implementations, and DI service registration code for untestable static dependencies. For statics that already have .NET built-in abstractions (`TimeProvider`, `IHttpClientFactory`), guide adoption of the built-in. For statics without built-in alternatives, generate custom minimal wrappers. ## When to Use - After running `detect-static-dependencies` and identifying which statics to wrap - When the user asks to make a class testable by replacing statics with injected abstractions - When adopting `TimeProvider` (.NET 8+) or `System.IO.Abstractions` - When creating a custom wrapper for `Environment.*`, `Console.*`, or `Process.*` - When a released static API needs an ambient seam because signatures cannot change ## When Not to Use - The user wants to find statics first (use `detect-static-dependencies`) - The user wants to bulk-replace call sites (use `migrate-static-to-wrapper`) - The static is already behind an interface If the target already consumes an injected interface or built-in abstraction, stop: do not add a second wrapper, project, registration, or test around that seam. …
Read the whole file at its exact version.
How to install
mdr add dotnet/skills/generate-testability-wrappers@sha256:58aac0affca5c0a5The line at the top of this page pins the label git:20260903.30b30ef, 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_xrcuoqp3ipb33r7m)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between Jul 7, 2026 and Sep 3, 2026, about one every 14 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260903.30b30ef latest | 2026-09-03 | 30b30ef | 15,658 B | A | view · diff |
| git:20260828.2b9056b | 2026-08-28 | 2b9056b | 15,081 B | A | view · diff |
| git:20260827.d3921f7 | 2026-08-27 | d3921f7 | 14,962 B | A | view · diff |
| git:20260731.573938d | 2026-07-31 | 573938d | 11,280 B | A | view · diff |
| git:20260707.1270722 | 2026-07-07 | 1270722 | 8,841 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 (15658 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
dotnet/skills · 5,836 stars · license MIT · pushed 2026-11-06 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_xrcuoqp3ipb33r7m GET https://markdownregistry.com/api/v1/resolve?ref=dotnet/skills/generate-testability-wrappers GET https://markdownregistry.com/api/v1/blob/58aac0affca5c0a56dab9e8e751f52ac4014533150355b734d6b5597ac8acec1
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.