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Find and fix async/await anti-patterns in C# code — blocking calls, async void, missing cancellation, fire-and-forget. Use when reviewing async code, diagnosing deadlocks or thread-pool starvation, or when the user asks about async correctness.
Codex 또는 Claude로 설치 이 Prompt를 복사해 Codex, Claude 또는 다른 어시스턴트에 붙여 넣으면 Skill 페이지를 검토하고 설치를 진행할 수 있습니다.
SOC 직업 분류 기준
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Plan and execute an upgrade of a project or solution to a newer .NET version (e.g. .NET 8 to .NET 10). Use when the user asks to upgrade, migrate, or modernize the target framework.
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Generate an xUnit test suite for a class, endpoint, or file. Use when the user asks for tests, test coverage, or to test something they just wrote.
Audit NuGet dependencies for vulnerabilities, deprecated packages, and outdated versions across the solution. Use when the user asks about package health, security vulnerabilities in dependencies, or updating packages.
Summarize uncommitted changes and flag risks. Use when the user asks what changed, wants a commit message, or asks to review their diff.
| name | async-hygiene |
| description | Find and fix async/await anti-patterns in C# code — blocking calls, async void, missing cancellation, fire-and-forget. Use when reviewing async code, diagnosing deadlocks or thread-pool starvation, or when the user asks about async correctness. |
Scan the target scope (default: whole solution) for each anti-pattern, in this order, and fix with the standard remedy:
| Anti-pattern | Find | Fix |
|---|---|---|
| Sync-over-async | .Result, .Wait(), .GetAwaiter().GetResult() | Make the caller async and await |
async void | any non-event-handler | Return Task |
| Missing CancellationToken | async public methods without a token parameter | Add CancellationToken cancellationToken = default and thread it through |
| Fire-and-forget | unawaited Task-returning calls | Await, or route through a background service with error handling |
Task.Run in ASP.NET request path | Task.Run( in Api project | Remove — the request is already on a thread-pool thread |
| Async lambda passed to sync delegate | async lambda to Action<> | Change delegate type or restructure |
Unnecessary async/await wrapper | method whose only await is the final return | Return the Task directly (unless in a using/try) |
| Blocking I/O in async method | File.ReadAllText, Thread.Sleep inside async | Use async equivalents (ReadAllTextAsync, Task.Delay) |
Process: grep for each pattern → read the surrounding code (some hits are legitimate, e.g. Main, console tools) → fix true positives → dotnet build → report a table of what changed and any hits deliberately left alone with reasoning.
