Fix design documentation issues found in formal review

[Copilot]

Pull Request

Description

Performed formal code reviews on all 6 review-sets defined in .reviewmark.yaml. Five review-sets passed with no issues. The NuGetCaching-Design review-set identified 2 documentation issues which are fixed in this PR.

Review Results

Review Set	Verdict
Purpose	✅ PASS
NuGetCaching-Architecture	✅ PASS
NuGetCaching-Design	⚠️ CONDITIONAL PASS (2 issues fixed)
NuGetCaching-AllRequirements	✅ PASS
NuGetCaching-NuGetCache	✅ PASS
NuGetCaching-PathHelpers	✅ PASS

Fix 1: Missing requirement traceability in nuget-cache.md

The EnsureCachedAsync method design explicitly described the behaviour that satisfies Caching-Lib-NotFound (throwing InvalidOperationException when no source provides the package), but the traceability statement at the end of the method section omitted this requirement. Updated the statement to include Caching-Lib-NotFound.

Fix 2: Remove test folder layout from introduction.md

The design document contained a "Test code mirrors the source structure" section listing the test file hierarchy. Test details do not belong in design documentation, so this section has been removed.

Full review reports for all 6 review-sets are saved in .agent-logs/ and are not committed to the repository.

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Code quality improvement

Related Issues

Pre-Submission Checklist

Before submitting this pull request, ensure you have completed the following:

Build and Test

• Code builds successfully: dotnet build --configuration Release
• All unit tests pass: dotnet test --configuration Release
• Code produces zero warnings

Code Quality

• Code formatting is correct: dotnet format --verify-no-changes
• New code has appropriate XML documentation comments
• Static analyzer warnings have been addressed

Quality Checks

Please run the following checks before submitting:

• All linters pass: ./lint.sh (Unix/macOS) or cmd /c lint.bat / ./lint.bat (Windows)

Testing

• Added unit tests for new functionality
• Updated existing tests if behavior changed
• All tests follow the AAA (Arrange, Act, Assert) pattern
• Test coverage is maintained or improved

Documentation

• Updated README.md (if applicable)
• Updated ARCHITECTURE.md (if applicable)
• Added code examples for new features (if applicable)
• Updated requirements.yaml (if applicable)

Additional Notes

Changes are documentation-only. No code or requirements were modified. All other review-sets (Purpose, NuGetCaching-Architecture, NuGetCaching-AllRequirements, NuGetCaching-NuGetCache, NuGetCaching-PathHelpers) passed with no findings.

[Copilot]

Pull request overview

Updates NuGet caching design documentation to address traceability and scope issues identified in a formal review.

Changes:

• Adds missing requirement traceability (Caching-Lib-NotFound) to the EnsureCachedAsync design section.
• Removes test folder layout details from design introduction to keep documentation focused on design (not test structure).

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
docs/design/nuget-caching/nuget-cache.md	Adds missing requirement traceability reference for the “package not found” behavior.
docs/design/introduction.md	Removes test layout section to keep design docs scoped to architecture/design.

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