Loading skill
Install any skill in seconds. Free to start, no credit card required.
Get Started Free →managedcode/migrate-static-to-wrapper
Replace existing static dependency call sites with a wrapper or built-in abstraction that already exists or is registered in DI. Codemod-style bulk replacement of DateTime.Now/UtcNow to TimeProvider, File.ReadAllText to IFileSystem, and similar, across a bounded scope (file, project, namespace), adding constructor injection to affected classes and updating their unit tests to use a test double. USE FOR: replace DateTime.UtcNow/DateTime.Now with TimeProvider and add the constructor parameter, mig
Passed 17 of 21 test cases with the skill, and 16 of 21 without it.
and 1 more in the full report
4 fixed15 passed either way1 still failing3 broke
Tokens, turns and time describe resource use, not a dollar price.
One of 4 test cases the skill fixed. Same model, same prompt, with and without the skill.
After completing the mechanical code replacements for static dependencies in `NotificationService.cs`, what verification command should be executed?
| Checked | Without skill | With skill |
|---|---|---|
| Runs dotnet build to confirm compilation succeeds. | Missed | Passed |
The instructions your model reads when the skill loads.
Perform mechanical, codemod-style replacement of static dependency call sites with calls to injected wrapper interfaces or built-in abstractions. Operates on a bounded scope (single file, project, or namespace) so migrations can be done incrementally.
generate-testability-wrappers) or built-in abstractions identifiedDateTime.UtcNow → TimeProvider.GetUtcNow() across a projectFile.* → IFileSystem.File.* across a namespacegenerate-testability-wrappers first)detect-static-dependencies)| Input | Required | Description |
|---|---|---|
| Static pattern | Yes | What to replace (e.g., DateTime.UtcNow, File.ReadAllText) |
| Replacement abstraction | Yes | What to use instead (e.g., TimeProvider, IFileSystem) |
| Scope | Yes | File path, project (.csproj), namespace, or directory to migrate |
| Injection strategy | No | constructor (default), primary-constructor, or ambient |
Before modifying any code:
Confirm the wrapper/abstraction exists: Check that the interface or built-in abstraction is available in the project. For TimeProvider, verify the target framework is .NET 8+ or Microsoft.Bcl.TimeProvider is referenced. For System.IO.Abstractions, verify the NuGet package is referenced.
Confirm DI registration exists: Check Program.cs or Startup.cs for the service registration. If missing, add it before proceeding.
Identify all files in scope: List the .cs files that will be modified. Exclude test projects, obj/, bin/, and generated code.
test cases passed, vs 16 / 21 without
Published skills whose descriptions closely match this one, with their headline benchmark lift.
More skills from the same source and nearby in the registry, with their headline benchmark lift.