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BEST_PRACTICES.md
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BEST_PRACTICES.md
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# Best Practices for Integrated System
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**Date**: 2025-01-27
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**Purpose**: Best practices and guidelines for working with integrated workspace
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**Status**: Complete
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---
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## Overview
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This document outlines best practices for developing, maintaining, and operating projects in the integrated workspace.
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---
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## Code Organization
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### Use Shared Packages
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- **Always prefer** shared packages over duplicate code
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- **Check** `workspace-shared/` before creating new utilities
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- **Contribute** common code to shared packages
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### Project Structure
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```
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project/
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├── src/ # Source code
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├── tests/ # Tests
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├── docs/ # Project documentation
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├── package.json # Dependencies
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└── README.md # Project overview
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```
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### Naming Conventions
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- **Files**: kebab-case (`user-service.ts`)
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- **Classes**: PascalCase (`UserService`)
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- **Functions**: camelCase (`getUserById`)
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- **Constants**: UPPER_SNAKE_CASE (`MAX_RETRIES`)
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---
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## Dependency Management
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### Use Workspace Packages
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```json
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{
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"dependencies": {
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"@workspace/shared-types": "workspace:*",
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"@workspace/shared-auth": "workspace:*"
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}
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}
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```
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### Version Pinning
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- **Production**: Pin exact versions
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- **Development**: Use `workspace:*` for shared packages
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- **External**: Use semantic versioning ranges
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### Dependency Updates
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- **Regular audits**: Run `pnpm audit` monthly
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- **Security updates**: Apply immediately
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- **Major updates**: Test thoroughly before applying
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---
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## Testing
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### Test Coverage
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- **Minimum**: 80% code coverage
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- **Critical paths**: 100% coverage
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- **Edge cases**: Test all error scenarios
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### Test Organization
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```
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tests/
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├── unit/ # Unit tests
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├── integration/ # Integration tests
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├── e2e/ # End-to-end tests
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└── fixtures/ # Test data
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```
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### Testing Best Practices
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- Write tests before code (TDD)
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- Use descriptive test names
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- Mock external dependencies
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- Test error cases
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- Keep tests fast and isolated
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---
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## Documentation
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### README Requirements
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- Project overview
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- Setup instructions
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- Usage examples
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- API documentation
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- Contributing guidelines
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### Code Documentation
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- JSDoc for public APIs
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- Inline comments for complex logic
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- Architecture diagrams for complex systems
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- Update docs with code changes
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---
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## CI/CD
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### Workflow Standards
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- **Lint**: Run on all PRs
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- **Test**: Run on all PRs
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- **Build**: Run on all PRs
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- **Deploy**: Run on main branch
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### Pipeline Best Practices
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- Fast feedback (< 10 minutes)
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- Parallel execution where possible
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- Caching for dependencies
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- Clear error messages
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---
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## Infrastructure
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### Infrastructure as Code
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- **Always use** Terraform for infrastructure
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- **Use shared modules** from `infrastructure/terraform/modules/`
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- **Version control** all infrastructure changes
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- **Test** infrastructure changes in dev first
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### Resource Naming
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- Use consistent naming conventions
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- Include environment prefix
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- Include project identifier
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- Use descriptive names
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---
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## Security
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### Secrets Management
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- **Never commit** secrets to git
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- **Use** environment variables or secret managers
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- **Rotate** secrets regularly
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- **Audit** secret access
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### Authentication
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- Use shared auth package (`@workspace/shared-auth`)
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- Implement proper RBAC
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- Use JWT tokens with expiration
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- Validate all inputs
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### Dependencies
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- **Regular audits**: `pnpm audit`
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- **Update promptly**: Security patches
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- **Review**: New dependencies before adding
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- **Pin versions**: For production
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---
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## Performance
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### Code Optimization
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- Profile before optimizing
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- Use shared utilities
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- Cache expensive operations
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- Optimize database queries
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### Infrastructure
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- Right-size resources
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- Use auto-scaling
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- Monitor resource usage
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- Optimize costs
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---
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## Monitoring
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### Logging
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- Use structured logging (JSON)
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- Include correlation IDs
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- Log at appropriate levels
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- Don't log sensitive data
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### Metrics
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- Track key business metrics
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- Monitor error rates
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- Track performance metrics
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- Set up alerts
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---
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## Git Workflow
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### Branching Strategy
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- **main**: Production-ready code
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- **develop**: Integration branch
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- **feature/**: New features
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- **fix/**: Bug fixes
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- **hotfix/**: Critical fixes
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### Commit Messages
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```
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feat: add user authentication
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fix: resolve login timeout issue
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docs: update API documentation
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refactor: simplify payment processing
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test: add integration tests
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```
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### Pull Requests
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- **Small PRs**: Easier to review
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- **Clear description**: What and why
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- **Tests**: Include tests
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- **Documentation**: Update docs
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- **Review**: Get approval before merging
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---
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## Error Handling
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### Error Types
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- **Validation errors**: Return 400
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- **Authentication errors**: Return 401
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- **Authorization errors**: Return 403
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- **Not found**: Return 404
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- **Server errors**: Return 500
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### Error Messages
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- **User-friendly**: Clear messages
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- **Actionable**: What to do next
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- **Secure**: Don't leak sensitive info
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- **Logged**: Log detailed errors
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---
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## API Design
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### RESTful APIs
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- Use standard HTTP methods
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- Use proper status codes
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- Version APIs (`/v1/`, `/v2/`)
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- Document with OpenAPI/Swagger
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### Response Format
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```json
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{
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"data": { ... },
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"meta": {
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"pagination": { ... }
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},
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"errors": []
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}
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```
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---
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## Database
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### Migrations
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- Version all migrations
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- Test migrations in dev
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- Backup before production
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- Rollback plan ready
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### Queries
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- Use parameterized queries
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- Index frequently queried fields
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- Avoid N+1 queries
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- Monitor slow queries
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---
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## Deployment
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### Deployment Strategy
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- **Blue-Green**: Zero downtime
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- **Canary**: Gradual rollout
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- **Rolling**: Incremental updates
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- **Feature flags**: Control feature rollout
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### Pre-Deployment
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- Run all tests
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- Check dependencies
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- Review security
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- Update documentation
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### Post-Deployment
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- Monitor metrics
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- Check logs
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- Verify functionality
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- Update status page
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---
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## Collaboration
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### Code Reviews
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- **Be constructive**: Focus on code, not person
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- **Be timely**: Review within 24 hours
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- **Be thorough**: Check logic, tests, docs
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- **Be respectful**: Professional tone
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### Communication
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- **Clear**: Be specific
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- **Timely**: Respond promptly
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- **Documented**: Important decisions in ADRs
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- **Transparent**: Share progress and blockers
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---
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## Continuous Improvement
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### Regular Reviews
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- **Code reviews**: Every PR
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- **Architecture reviews**: Quarterly
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- **Security reviews**: Monthly
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- **Performance reviews**: As needed
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### Learning
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- **Stay updated**: Follow tech trends
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- **Share knowledge**: Tech talks, docs
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- **Experiment**: Try new approaches
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- **Measure**: Track improvements
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---
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## Related Documents
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- [Onboarding Guide](./ONBOARDING_GUIDE.md)
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- [Testing Standards](./TESTING_STANDARDS.md)
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- [Deployment Guide](./DEPLOYMENT_GUIDE.md)
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- [Monorepo Governance](./MONOREPO_GOVERNANCE.md)
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---
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**Last Updated**: 2025-01-27
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