[Feature Request] Add Developer Documentation

[vincentkoc]

Description

Create comprehensive developer documentation for contributors.

Files to Create

1. CONTRIBUTING.md - Contribution guidelines
2. ARCHITECTURE.md - Technical architecture deep-dive
3. docs/api-reference.md - Expand current API docs
4. docs/troubleshooting.md - Common issues and solutions
5. docs/migration-guide.md - Version upgrade guides

CONTRIBUTING.md Should Include

• Code of conduct
• Development setup
• Coding standards
• Pull request process
• Testing requirements
• Documentation requirements

ARCHITECTURE.md Should Include

• System architecture diagram
• Component interactions
• Data flow
• Transport layer design
• Tool system architecture
• Configuration system
• Testing strategy

Tasks

• Create CONTRIBUTING.md
• Create ARCHITECTURE.md
• Expand docs/api-reference.md
• Create docs/troubleshooting.md
• Create docs/migration-guide.md
• Add architecture diagrams
• Link from main README
• Review by team

References

• Update existing CLAUDE.md as needed
• Complement existing documentation