[stphnwlsh]

Summary

Until now nothing we wrote logged anything. This gives each request a clear trail, the same as CleanMinimalApi #66.

• LoggingBehaviour wraps every use case and logs how it ended, at Information, with the request name and its time in milliseconds: handled, failed validation (with the property names, never the values) or found nothing. It's registered before ValidationBehaviour, so it sees validation failures too. The messages are [LoggerMessage] source-generated, and the time comes from TimeProvider.
• Unexpected tool errors are logged. ToolErrorFilter turns them into a tool error for the model, so nothing else ever saw them. It now logs them as Error, with the exception and the tool's name. Resources and prompts already get logged by the MCP SDK when ProtocolErrorFilter lets an exception through.
• Information is the default level, and appsettings.local.json lowers it to Debug.
• TimeProvider.System is registered with TryAddSingleton in both AddApplication and AddInfrastructure, so each layer works on its own without registering the clock twice.
• FakeLogger (Microsoft.Extensions.Diagnostics.Testing, MIT) checks the messages in the behaviour and filter tests.
• The serilog, mediator, time-provider, errors-and-exceptions, unit-tests and api-conventions skills describe all of this.

[github-actions]

Build Pipeline

✅ Ready to merge. Every stage passed.

Stage	Result	Details
Build	🟢 Passed	Version 2026.11.03.145-pr-37 · Template package 204 KB
Test	🟢 Passed	232 passed · 0 failed · 0 skipped · Template installs, builds and passes its tests
Coverage	🟢 Passed	100% (771 of 771 lines) · Needs 95%
Static Analysis	🟢 Passed	No open CodeQL alerts
Dependency Review	🟢 Passed	0 vulnerable packages · 0 licence problems
Container Scan	🟢 Passed	Image starts and answers · No open Trivy alerts

_{Commit 73cd8be · Full run}