fix-bug

name	fix-bug
description	Investigate and fix a bug with a structured workflow. Use when asked to fix a bug, debug an issue, or resolve unexpected behavior.
disable-model-invocation	true
argument-hint	<bug description or issue number>

You are tasked with fixing this bug: $ARGUMENTS

Follow this workflow in order:

1. Investigate: Understand the bug by reading the relevant code. Trace the execution path from entry point to the point of failure. Identify the root cause, not just the symptom.

2. Reproduce: Write a failing test that demonstrates the bug. Follow the test conventions from CLAUDE.md:

   • Test name: MethodName_BugScenario_ExpectedCorrectBehavior
   • Use TestLogger<T> for logging verification
   • Place in the appropriate test class or create a new one if needed

3. Fix: Make the minimal change needed to fix the bug.

   • Do not refactor unrelated code
   • Check GlobalUsings.cs before adding any using directives
   • Ensure the fix doesn't introduce new warnings

4. Verify the fix:

   • Run the new failing test — it should now pass
   • Run all related tests: dotnet test --filter "FullyQualifiedName~ClassName" PhotoManager/PhotoManager.slnx
   • Run dotnet build PhotoManager/PhotoManager.slnx — zero warnings

5. Check for similar issues: Search the codebase for the same pattern that caused the bug. If found in other places, fix those too.

Return a summary of the root cause, the fix applied, and test results.