Pull updates from template repo and add macOS platform support

[Copilot]

Pull Request

Description

Syncs SpdxTool with the latest TemplateDotNetTool patterns and adds macOS as a fully tested and requirements-tracked platform.

Template Sync

Agent guidance (AGENTS.md + .github/agents/)

• Added "Agent Selection Guide" (bug→developer, feature→requirements→developer→test, etc.)
• Added "Test Source Filters" section documenting windows@, ubuntu@, macos@, net8.0@, dotnet8.x@ prefixes
• Added "Requirements" enforcement section (policy + dotnet reqstream --enforce command)
• code-quality-agent.md: added Requirements Traceability as quality gate Add support for variables in workflow files. #4; added lint.sh/lint.bat convenience commands
• requirements-agent.md: added "Requirements Format" section; fixed first bullet to "Creating new requirements"
• software-developer.md: added "Link to requirements in requirements.yaml" to self-validation guidance

Workflows

• build_on_push.yaml: renamed workflow from Build → Build on Push
• build.yaml: reordered quality-check steps to markdownlint → cspell → yamllint; simplified OS_SHORT sed to sed 's/-latest//' matching the template pattern

Config / IDE

• .editorconfig: removed duplicate [*.{cs,vb}] section with redundant dotnet_sort_system_directives_first / dotnet_separate_import_directive_groups entries
• .vscode/tasks.json: new file with standard tasks (build, validate, format, lint-all, verify-requirements, etc.)

Documentation

• README.md: added "Continuous Compliance" feature bullet and ## License section with CLA sentence; [link-license] uses absolute URL for correct rendering on nuget.org

Test project

• DemaConsulting.SpdxTool.Tests.csproj: moved Implicit Usings ItemGroup before test-framework deps; added explanatory comments for coverlet.collector

macOS Platform Support

• Added macos-latest to build, integration-test (3 OS × 3 .NET = 9 combos), and targets-integration-test matrices in build.yaml
• OS_SHORT uses sed 's/-latest//' producing windows, ubuntu, macos — automatically handles any future platforms without sed chain changes
• Added macos@TestName source-filter prefix to requirements.yaml header
• Added SpdxTool-Plt-MacOS requirement linked to macos@SpdxTool_Validate and all five MSBuild targets tests
• Updated AGENTS.md CI/CD section: Windows/Linux → Windows/Linux/macOS

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

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
• Self-validation tests pass:
  dotnet run --project src/DemaConsulting.SpdxTool --configuration Release --framework net10.0
--no-build -- --validate
• 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:

• Spell checker passes: cspell "**/*.{md,cs}"
• Markdown linter passes: markdownlint "**/*.md"
• YAML linter passes: yamllint .

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

macOS CI jobs will initially show the SpdxTool-Plt-MacOS requirement as unsatisfied until the first macOS CI run produces TRX results — this is expected behaviour per the requirements.yaml header note about platform-specific requirements requiring CI evidence.

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[Copilot]

Pull request overview

This PR syncs SpdxTool with updated TemplateDotNetTool patterns and extends CI + requirements traceability to treat macOS as a first-class supported platform.

Changes:

• Add macOS to CI build/integration/targets test matrices and introduce a macOS platform requirement with test evidence links.
• Sync agent guidance docs and workflow step ordering to match the template patterns.
• Add standard VS Code tasks and minor documentation/config cleanups (README license section, .editorconfig dedupe, test project csproj ordering).

Reviewed changes

Copilot reviewed 11 out of 11 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
test/DemaConsulting.SpdxTool.Tests/DemaConsulting.SpdxTool.Tests.csproj	Reorders implicit usings ItemGroup and clarifies coverlet collector behavior.
requirements.yaml	Adds macos@ source filter docs and introduces SpdxTool-Plt-MacOS requirement linked to platform evidence tests.
README.md	Adds “Continuous Compliance” bullet and a License section with absolute license link.
AGENTS.md	Adds agent selection guide, requirements enforcement notes, source filter guidance, and updates CI/CD platform wording.
.vscode/tasks.json	Adds common VS Code tasks (build/validate/format/lint/req enforcement).
.github/workflows/build_on_push.yaml	Renames workflow to “Build on Push”.
.github/workflows/build.yaml	Reorders quality steps, adds macOS to matrices, and simplifies OS short-name derivation.
.github/agents/software-developer.md	Adds reminder to link work back to requirements.yaml.
.github/agents/requirements-agent.md	Updates guidance to focus on creating requirements and documents required format.
.github/agents/code-quality-agent.md	Adds requirements traceability as a quality gate and documents lint helpers.
.editorconfig	Removes redundant per-language section to reduce duplication.

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