> Document Version: 1.0 Document Owner: Acme Inc Next Review Date: 2027-03-19

Last updated: 2026-03-19

Project: nextjs-saas-example

Company: Acme Inc

## Related Documents

- Data Flow Map (`DATAFLOWMAP.md`)
- Privacy Policy (`PRIVACY_POLICY.md`)

> This document provides a visual representation of how personal data flows through the application. The diagram below is rendered using Mermaid and can be viewed directly on GitHub, GitLab, or any Mermaid-compatible renderer.

## Visual Data Flow

    graph LR
      User[User] -->|error data, stack traces, user context| Sentry[Sentry]
      User[User] -->|email, password hash, session data| Supabase[Supabase]
      User[User] -->|user prompts, conversation history, generated content| OpenAI[OpenAI]
      User[User] -->|user behavior, session recordings, feature flag usage| PostHog[PostHog]
      User[User] -->|user data as defined in schema| Prisma[Prisma]
      User[User] -->|email addresses, email content| Resend[Resend]
      User[User] -->|payment information, billing address, email| Stripe[Stripe]
      User[User] -->|payment information, billing address, email| stripe_ios[stripe-ios]
      OpenAI[OpenAI] -->|logs| Sentry[Sentry]

## Legend

Symbol | Meaning
--- | ---
User | End user of the application
Arrow labels | Types of personal data transmitted
Service nodes | Third-party or internal services processing data

## Data Flow Details

### Collection Points

Source | Data Collected | Mechanism
--- | --- | ---
User registration/login | email, password hash, session data, user metadata | via @supabase/supabase-js
AI-powered feature usage | user prompts, conversation history, generated content | via openai
Email subscription/contact forms | email addresses, email content | via resend
Payment checkout | payment information, billing address, email, transaction history | via stripe
Payment checkout | payment information, billing address, email, transaction history | via stripe-ios

### Third-Party Data Sharing

Recipient | Category | Data Shared
--- | --- | ---
@sentry/node | Error Monitoring | error data, stack traces, user context, device information, IP address
openai | AI Service | user prompts, conversation history, generated content
posthog | Analytics | user behavior, session recordings, feature flag usage, device information
resend | Email Service | email addresses, email content
stripe | Payment Processing | payment information, billing address, email, transaction history
stripe-ios | Payment Processing | payment information, billing address, email, transaction history

## Service Inventory

Service | Category | Data Processed
--- | --- | ---
Sentry | monitoring | error data, stack traces, user context, device information, IP address
Supabase | auth | email, password hash, session data, user metadata
OpenAI | ai | user prompts, conversation history, generated content
PostHog | analytics | user behavior, session recordings, feature flag usage, device information
Prisma | database | user data as defined in schema
Resend | email | email addresses, email content
Stripe | payment | payment information, billing address, email, transaction history
stripe-ios | payment | payment information, billing address, email, transaction history

## How to Use This Diagram

1. GitHub/GitLab: The Mermaid diagram renders automatically in markdown preview
2. VS Code: Install the "Markdown Preview Mermaid Support" extension
3. Export: Use Mermaid Live Editor to export as SVG or PNG
4. CI/CD: Use `@mermaid-js/mermaid-cli` to generate images in your pipeline

For questions about this data flow diagram, contact legal@acme.com.

This data flow diagram was generated by Codepliant based on automated code analysis. Review and verify all data flows for accuracy. This document does not constitute legal advice.