How do I install the Generate Testability Wrappers Claude Code skill?

Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/generate-testability-wrappers/SKILL.md and restart Claude Code. Both flows are detailed at https://claudskills.com/install/.

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.

ClaudSkills / Dev Tools / tools-misc

Generate Testability Wrappers

Category: Dev Tools · Sub-category: tools-misc · Last updated: 2026-05-21

type:generator

Generate wrapper interfaces and DI registration for hard-to-test static dependencies in C#. Produces IFileSystem, IEnvironmentProvider, IConsole, IProcessRunner wrappers, or guides adoption of TimeProvider and IHttpClientFactory. USE FOR: generate wrapper for static, create IFileSystem wrapper, wrap DateTime.Now, make static testable, make class testable, create abstraction for File.*, generate DI registration, TimeProvider adoption, IHttpClientFactory setup, testability wrapper, mock-friendly interface, mock time in tests, create the right abstraction to mock, how to mock DateTime, test code using File.ReadAllText, what abstraction for Environment, how to make statics injectable, adopt System.IO.Abstractions, make file calls testable. DO NOT USE FOR: detecting statics (use detect-static-dependencies), migrating call sites (use migrate-static-to-wrapper), general interface design not about testability.

From the source SKILL.md

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.

What this skill does

Generate Testability Wrappers is a community-contributed Claude Code skill in the tools-misc sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/generate-testability-wrappers/ and loads when your prompt matches the skill's trigger.

Who uses this skill

The Generate Testability Wrappers Claude Code skill is built for developers, power users, and teams automating repetitive workflows and improving developer experience. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 70,000+ 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/generate-testability-wrappers
curl -L https://claudskills.com/skills/generate-testability-wrappers/SKILL.md \
  -o ~/.claude/skills/generate-testability-wrappers/SKILL.md

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

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

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

Attribution & license

License: MIT

Cite this skill

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

APA

ClaudSkills. (2026). Generate Testability Wrappers [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/generate-testability-wrappers/

BibTeX

@misc{generate-testability-wrappers-2026,
  author    = {ClaudSkills},
  title     = {Generate Testability Wrappers [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/generate-testability-wrappers/}
}

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