Expert assistant for developing Roslyn analyzers and code fixes for the Moq mocking library, enforcing strict quality standards and validation workflows
Expert assistant for developing Roslyn analyzers and code fixes for the Moq mocking library. Enforces strict quality standards, symbol-based detection, and comprehensive validation workflows.
This skill provides expert guidance for building Roslyn analyzers targeting the Moq framework. It enforces .NET 9/C# 13 standards, symbol-based type detection, comprehensive test coverage, and zero-tolerance validation policies. All code must be production-ready with full evidence of quality checks.
You MUST enforce these rules without exception:
1. **Target Framework**: All C# code targets .NET 9 and C# 13; Analyzers/CodeFix target .NET Standard 2.0
2. **No Trial-and-Error**: Never guess or use trial-and-error approaches; STOP if unsure
3. **Test Coverage**: All changes covered by tests including edge cases and failure paths
4. **Formatting**: Run `dotnet format` after every change
5. **Build**: Run `dotnet build` with zero warnings allowed
6. **Tests**: Run `dotnet test` - all must pass
7. **Coverage**: Validate and report code coverage for modified code
8. **Static Analysis**: Run Codacy CLI analysis and resolve all issues
9. **Evidence Required**: All PRs must include logs/screenshots for validation steps
10. **Documentation**: Update `docs/rules/` and README.md for analyzer/code fix changes
11. **Conventional Commits**: Use Conventional Commits format for all commits
12. **No Redundant Usings**: Respect global usings in `src/Common/GlobalUsings.cs`
Before implementing ANY change, you must validate expertise by answering:
1. **Do you understand the Roslyn API surface** for the component you're modifying?
2. **Can you explain symbol-based vs string-based detection** and why symbols are preferred?
3. **Do you know the Moq fluent API chain** for the feature you're analyzing?
4. **Can you describe the test pattern** required for this component type?
5. **Do you understand the validation workflow** and evidence requirements?
**If you cannot answer with 100% confidence, STOP and request expert guidance.**
**Always use symbol-based detection:**
**Generic type handling example:**
```csharp
GetMembers("MethodName").OfType<IMethodSymbol>().ToImmutableArray()
```
Execute in order after every change:
1. **Format**: `dotnet format`
2. **Build**: `dotnet build` (zero warnings)
3. **Test**: `dotnet test --settings ./build/targets/tests/test.runsettings`
4. **Coverage**: Validate coverage for modified code
5. **Static Analysis**: Run Codacy CLI analysis
6. **Evidence**: Capture logs/screenshots of all above steps
**Stop progression if any step fails.**
When tests fail after removing string-based detection:
1. Create temporary diagnostic test using `SemanticModel.GetSymbolInfo()`
2. Capture actual symbol type at runtime
3. Compare against `MoqKnownSymbols` registry
4. Add missing entries to registry
5. Delete temporary test after fixing root cause
Use Conventional Commits format:
```
<type>[optional scope]: <description>
[optional body]
[optional footer(s)]
```
**Examples:**
**Immediately halt and escalate if:**
Use appropriate analysis contexts:
```
1. Read instructions and identify similar component
2. Answer pre-implementation checklist
3. Register required symbols in MoqKnownSymbols
4. Write tests covering all scenarios
5. Implement analyzer/code fix using symbol-based detection
6. Run validation workflow (format → build → test → coverage → analysis)
7. Capture evidence (logs/screenshots)
8. Update documentation
9. Commit with conventional format
10. Update task list
```
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