Task 9.2: Final integration and comprehensive documentation

[jbrinkman]

Task 9.2: Final Integration and Documentation

This PR completes task 9.2 from the project specification, delivering comprehensive documentation, sample configurations, and final end-to-end testing for the DotNet API Diff tool.

📋 Task Requirements Completed

✅ Create comprehensive README with usage examples
✅ Add sample configuration files and GitHub workflow examples
✅ Perform final end-to-end testing with real-world assemblies
✅ Git Workflow: Create branch feature/task-9.2-documentation, commit, push, and create PR
✅ Requirements: 2.3, 4.1, 4.2, 4.3

🚀 Key Enhancements

Enhanced Documentation

• Comprehensive README: Complete rewrite with detailed usage examples, CI/CD integration guides, and troubleshooting
• Real-world examples: NuGet package release checks, multi-target framework analysis, pre-release validation
• Exit codes documentation: Clear mapping of exit codes to semantic versioning practices
• Advanced usage scenarios: Custom report formats, programmatic usage, build tool integration

Sample Configurations & Workflows

• samples/basic-config.json: Basic configuration for simple libraries
• samples/enterprise-config.json: Advanced configuration for large enterprise libraries
• samples/strict-breaking-changes.json: Strict breaking change detection
• samples/lenient-changes.json: Lenient configuration for pre-release versions
• samples/namespace-filtering.json: Advanced namespace filtering examples
• samples/github-workflow-api-check.yml: Complete GitHub Actions workflow for API compatibility checking
• samples/github-api-diff-config.json: GitHub-specific configuration

Technical Improvements

• Fixed console output formatting: Resolved Spectre.Console rendering issues for proper table display
• Enhanced dependency injection: Fixed TypeRegistrar to properly handle service resolution
• Updated test compatibility: All tests now work with enhanced constructor signatures
• Improved error handling: Better format string handling for all output formats

🧪 End-to-End Testing Results

Successfully tested all functionality with real test assemblies:

Console Output ✅

┌───────────────────────┬─────────────────────┐
│ API Comparison Report │               Value │
├───────────────────────┼─────────────────────┤
│ Source Assembly       │  TestAssemblyV1.dll │
│ Target Assembly       │  TestAssemblyV2.dll │
│ Comparison Date       │ 2025-07-25 13:04:08 │
│ Total Differences     │                  21 │
│ Breaking Changes      │                  10 │
└───────────────────────┴─────────────────────┘

JSON Output ✅

• Structured data with complete change details
• Proper serialization of all comparison results
• Machine-readable format for CI/CD integration

Markdown Output ✅

• GitHub-friendly documentation format
• Collapsible signature details
• Professional report formatting

Configuration Loading ✅

• All sample configurations load successfully
• Command-line options properly override config settings
• Filtering and exclusion rules work correctly

Exit Codes ✅

• Exit Code 0: No breaking changes
• Exit Code 1: Non-breaking changes only
• Exit Code 2: Breaking changes detected
• Exit Code 4: Configuration errors
• Exit Code 99: Unexpected errors

📊 Test Results Summary

• 21 total differences detected between test assemblies
• 10 breaking changes identified correctly
• 11 non-breaking additions properly classified
• All output formats working correctly
• Configuration files loading and applying successfully
• Command-line filtering functioning as expected

🔧 Technical Details

Files Modified/Added

• README.md - Comprehensive documentation rewrite
• samples/*.json - Sample configuration files
• samples/github-workflow-api-check.yml - GitHub Actions workflow
• src/DotNetApiDiff/Reporting/ConsoleFormatter.cs - Fixed console rendering
• src/DotNetApiDiff/Commands/TypeRegistrar.cs - Enhanced DI resolution
• src/DotNetApiDiff/Commands/CompareCommand.cs - Improved output handling
• Multiple test files - Updated for new constructor signatures

Breaking Changes

None - all changes are additive or internal improvements.

Dependencies

No new dependencies added. Enhanced usage of existing Spectre.Console and Microsoft.Extensions.* packages.

🎯 Ready for Production

This PR delivers a fully functional, well-documented API diff tool ready for:

• ✅ Production use in development workflows
• ✅ CI/CD pipeline integration
• ✅ Automated semantic versioning decisions
• ✅ Enterprise-scale API compatibility checking

The tool now provides comprehensive documentation, sample configurations, and robust end-to-end testing, making it easy for teams to adopt and integrate into their development processes.