refactor: remove CONTRIBUTING.md and integrate development guidelines into CLAUDE.md

[okotaku]

Summary

• Remove CONTRIBUTING.md as development is AI-first with human review
• Integrate comprehensive development guidelines into CLAUDE.md
• Establish CLAUDE.md as the single source of truth for development practices

Changes Made

🗑️ Removed CONTRIBUTING.md

• Deleted human-oriented contribution guide as development is now AI-first
• Claude Code handles primary development with human guidance and review

📝 Enhanced CLAUDE.md

Development Philosophy Section

• Define AI-first development approach
• Claude Code performs primary development (code generation, bug fixes, features, refactoring)
• Humans provide guidance and review (requirements, strategic direction, quality assurance)
• Quality gates ensure reliability through automated testing, linting, and type checking

Project Standards Integration

• Code Quality Requirements: All quality gates that must pass
• Commit Standards: Conventional commit format requirements
• Development Workflow: 5-step process from requirements to integration
• Code Patterns: Established patterns to follow (Python 3.12+, type hints, docstrings, etc.)
• Project Structure Guidelines: Clean organization principles

🔄 Updated README.md

• Changed Contributing section to reference CLAUDE.md instead of CONTRIBUTING.md
• Emphasize AI-first development approach
• Direct developers to CLAUDE.md for comprehensive guidelines

Benefits

✅ Single Source of Truth: All development guidelines consolidated in CLAUDE.md
✅ AI-First Alignment: Documentation matches the actual development workflow
✅ Simplified Structure: Removes redundant human-oriented contribution guide
✅ Enhanced AI Context: Claude Code has comprehensive project context in one place
✅ Clear Workflow: Well-defined process for AI development with human oversight

New Development Workflow

1. Requirements Gathering: Human provides clear requirements and context
2. AI Implementation: Claude Code generates code following project patterns
3. Quality Verification: Run all quality gates to ensure standards
4. Human Review: Human reviews changes for correctness and alignment
5. Integration: Merge changes after successful review

Test Plan

• Verify CLAUDE.md contains all necessary development guidelines
• Confirm README.md properly references CLAUDE.md
• Test that no references to CONTRIBUTING.md remain
• Validate markdown formatting and linting passes
• Ensure comprehensive project context is available for AI development

🤖 Generated with Claude Code