Add CLAUDE.md with codebase documentation for Claude Code

[cskwork]

This file provides architectural guidance and development instructions for future Claude Code instances working in this repository.

🤖 Generated with Claude Code

Description

Please include a summary of the change and which issue is fixed. Please also include relevant motivation and context. List any dependencies that are required for this change.

Fixes # (issue)

Type of change

Please delete options that are not relevant.

• [ ] 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)
• [ ] This change requires a documentation update

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce.

Checklist:

• [ ] I have performed a self-review of my own code
• [ ] I have made corresponding changes to the documentation
• [ ] My changes generate no new warnings or errors
• [ ] New and existing unit tests pass locally with my changes