care-api/.specify/memory/constitution.md

📋 CONSTITUTION - care-api

Project: KiviCare REST API WordPress Plugin
Domain: Healthcare Management System Integration
Created: 2025-09-12

🎯 Project Mission

Develop a comprehensive REST API WordPress plugin that provides secure, authenticated access to all KiviCare healthcare management system functionalities, enabling seamless third-party integrations and custom applications.

🔧 Technical Principles

Architecture

• WordPress Plugin Pattern: Native WordPress plugin with hooks/filters
• REST API First: All functionality exposed via REST endpoints
• Security by Design: JWT authentication, input validation, prepared statements
• Test-Driven Development: Comprehensive unit, integration, and contract tests

Code Standards

• WordPress Coding Standards (WPCS): Mandatory adherence
• PSR-4 Autoloading: Modern PHP class loading
• Documentation: PHPDoc comments for all public methods
• Security: Never trust user input, sanitize everything

Data Layer

• KiviCare Schema: Work with existing 35-table structure
• WordPress Database API: Use $wpdb for all database operations
• Prepared Statements: Prevent SQL injection vulnerabilities
• Data Validation: Strict input/output validation

🏥 Domain Expertise

Healthcare Context

• Patient Management: Demographics, medical history, privacy (HIPAA considerations)
• Appointment Scheduling: Complex scheduling rules, conflicts, notifications
• Clinical Documentation: Encounters, prescriptions, medical records
• Billing Integration: Services, bills, insurance claims

KiviCare Entities

Core: Patients, Doctors, Appointments, Clinics
Clinical: Encounters, Prescriptions, Services, Bills
System: Users, Roles, Settings, Logs

🔒 Security Requirements

Authentication

• JWT Tokens: Secure, stateless authentication
• Refresh Tokens: Long-lived session management
• Role-based Access: Different permissions per user type
• API Rate Limiting: Prevent abuse and DoS attacks

Data Protection

• Input Sanitization: All user inputs cleaned
• Output Encoding: Prevent XSS attacks
• SQL Injection Prevention: Only prepared statements
• Audit Logging: Track all data access/modifications

🧪 Quality Assurance

Testing Strategy

• Unit Tests: 80%+ code coverage minimum
• Integration Tests: Database operations, WordPress integration
• Contract Tests: API endpoint validation
• Security Tests: Authentication, authorization, input validation

Performance Standards

• Response Times: < 200ms for 95% of requests
• Memory Usage: Efficient resource management
• Database Queries: Optimized, indexed queries only
• Caching Strategy: Implement where appropriate

📐 API Design Principles

RESTful Design

• Resource-based URLs: /patients/{id}, /appointments/{id}
• HTTP Methods: GET, POST, PUT, DELETE semantic usage
• Status Codes: Proper HTTP response codes
• Consistent Naming: kebab-case for URLs, camelCase for JSON

Response Format

{
  "success": true,
  "data": {},
  "message": "Operation completed",
  "meta": {
    "timestamp": "ISO8601",
    "version": "1.0.0"
  }
}

🚀 Deployment Principles

WordPress Integration

• Plugin Activation: Proper setup/teardown hooks
• Database Migrations: Version-controlled schema changes
• WordPress Updates: Compatibility testing required
• Multisite Support: Consider network installations

Production Readiness

• Error Handling: Graceful failure modes
• Logging: Structured logs for monitoring
• Configuration: Environment-based settings
• Backup Strategy: Data protection procedures

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Constitution Version: 1.0
Last Updated: 2025-09-12
Next Review: Major feature additions