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Next Steps

Story Manager Handoff​

For Story Manager Implementation: You now have a comprehensive brownfield PRD for implementing role-based authentication and multi-tenant data siloing in the EMTB Tax Claim Management System.

Key Integration Requirements Validated:

  • Database schema enhancement must preserve existing data relationships
  • NestJS authorization infrastructure must integrate seamlessly with current Auth0 setup
  • Frontend role-based UI must maintain existing user experience patterns
  • All security implementations must be thoroughly tested for tenant isolation

Existing System Constraints Based on Project Analysis:

  • Monorepo structure (apps/api, apps/frontend) requires coordinated deployment
  • PostgreSQL + Prisma ORM setup enables database-level tenant isolation
  • Current Auth0 integration provides authentication foundation for role enhancement
  • Next.js + MUI frontend allows for role-based component rendering

First Story to Implement: Story 1.1 - Database Schema Enhancement for Tenant Isolation

  • Critical Integration Checkpoint: Verify all existing data relationships remain intact
  • Risk Mitigation: Complete database backup before migration execution
  • Success Validation: All existing API queries return correct data sets post-migration

System Integrity Focus: Throughout implementation, maintain existing tax claim functionality while layering security controls incrementally.

Developer Handoff​

For Development Team Starting Implementation:

Reference Documents:

  • This comprehensive brownfield PRD defining role-based authentication requirements
  • Existing coding standards analyzed from NestJS + TypeScript + Prisma architecture
  • Project brief (docs/brief.md) containing full business context

Integration Requirements with Existing Codebase:

  • Database Integration: Add tenant_id columns using Prisma migrations while preserving existing relationships
  • API Integration: Implement NestJS guards and decorators that layer onto existing controllers without breaking signatures
  • Frontend Integration: Enhance Auth0 provider and create role-aware MUI components maintaining existing layouts
  • Testing Integration: Extend existing Jest test suites with role-based and tenant isolation test scenarios

Key Technical Decisions Based on Real Project Constraints:

  • Use Prisma middleware for automatic tenant filtering to minimize code changes
  • Leverage existing Auth0 JWT token structure for role and tenant claim extraction
  • Implement database-level tenant isolation for maximum security with PostgreSQL constraints
  • Maintain existing Swagger API documentation while adding security schema definitions

Existing System Compatibility Requirements:

  • Zero API Breaking Changes: All existing endpoints must maintain request/response formats
  • Database Migration Safety: All tenant_id additions must preserve existing data integrity
  • Frontend Compatibility: Role-based UI rendering must not break existing component layouts
  • Authentication Flow Preservation: Auth0 integration must remain unchanged for existing users

Implementation Sequencing for Risk Minimization:

  1. Database Foundation (Story 1.1) - Schema changes with full rollback capability
  2. Authorization Infrastructure (Story 1.2) - NestJS security components without enforcement
  3. Tenant Context (Story 1.3) - Automatic data filtering with comprehensive logging
  4. Endpoint Security (Story 1.4) - Gradual role enforcement with feature flags
  5. Frontend Enhancement (Story 1.5) - Role-based UI with existing experience preservation
  6. Security Validation (Story 1.6) - Comprehensive testing and monitoring
ChangeDateVersionDescriptionAuthor
Initial Creation2025-09-08v1.0Complete brownfield PRD for RBAC and data siloing implementationJohn (Product Manager)