Your agent's minimal API accepts anything: turn on .NET 10 validation and test the 400s
Annotating a request record does nothing until AddValidation is called, and nothing tells you so. Four tests catch it, in about 15 minutes.
8 min read
Dotnet
Your agent's tests pass until midnight: inject TimeProvider and ban the system clock
Agent-written C# reaches for DateTime.UtcNow by default. A fake clock, three boundary tests and one analyzer rule fix it in about 20 minutes.
8 min read
Make the C# compiler reject an agent's half-finished enum change
A build setting, one test and a ten-line script turn a new enum member into a failing build everywhere it matters. About 15 minutes to set up.
11 min read