graph LR
  subgraph Core_Apps
    Oppulence[Oppulence - Monetization]
    Canvas[Oppulence Canvas - Recovery]
    BillFlow[BillFlow AP - Payables UI]
  end

  subgraph Data_Plane
    CanvasAPI[Canvas API]
    Worker[Canvas Worker]
    UnifiedAPI[Developer Platform - Unified API]
    Sync[Stripe Sync Engine]
    Storage[Oppulence Storage]
    Bus[Event Bus - Queue]
  end

  subgraph Data_Stores
    PG[(Postgres)]
    CH[(ClickHouse)]
    Obj[(Object Storage)]
  end

  subgraph External
    Stripe[Stripe]
    Email[Email Inbox]
    Vendors[Vendor Portals]
    Accounting[QBO Xero NetSuite]
    Bank[Bank ACH]
  end

  Oppulence --> CanvasAPI
  Canvas --> CanvasAPI
  BillFlow --> UnifiedAPI
  BillFlow --> Storage
  Oppulence --> UnifiedAPI
  Canvas --> UnifiedAPI

  CanvasAPI --> Bus
  Bus --> Worker

  Sync <--> Stripe
  Sync --> PG
  Sync --> CH

  Storage --> PG
  Storage <--> Obj
  Email --> Storage
  Vendors --> Storage

  UnifiedAPI <--> Accounting
  UnifiedAPI <--> Bank

  CanvasAPI --> Sync
  BillFlow --> Sync
  Oppulence --> Sync

graph TD
  Stripe[Stripe] -- Webhooks --> Sync[Stripe Sync Engine]
  Sync -- Normalized events --> Bus[Event Bus / Queue]
  Sync -- SQL writes --> PG[(Postgres)]
  Sync -- Analytics writes --> CH[(ClickHouse)]

  Email[Email Inbox] -- Forward/IMAP --> Storage[Oppulence Storage]
  Vendors[Vendor Portals] -- API pulls --> Storage
  Storage -- OCR/Extraction --> BillFlow[BillFlow AP]

  BillFlow -- HTTP API --> UnifiedAPI[Developer Platform]
  UnifiedAPI -- OAuth + REST --> Accounting[QBO Xero NetSuite]
  UnifiedAPI -- ACH/Bank APIs --> Bank[Bank ACH]

  Oppulence[Oppulence] -- HTTP API --> CanvasAPI[Canvas API]
  CanvasAPI -- Events --> Bus
  Bus -- Jobs --> Worker[Canvas Worker]

  CanvasAPI -- Query --> Sync
  BillFlow -- Query --> Sync
  CanvasAPI -- Docs/Contracts --> Storage

sequenceDiagram
  autonumber
  actor Customer
  participant Oppulence
  participant Stripe
  participant Sync as Stripe Sync Engine
  participant Bus as Event Bus / Queue
  participant CanvasAPI
  participant Worker as Canvas Worker
  participant Notify as Comms - Email SMS
  participant Unified as Developer Platform

  Customer->>Oppulence: Checkout / invoice
  Oppulence->>Stripe: Create charge/invoice
  Stripe-->>Sync: Webhook events
  Sync->>Bus: Publish normalized events
  Bus-->>CanvasAPI: Deliver billing events
  CanvasAPI->>Bus: Enqueue recovery workflow
  Bus-->>Worker: Run recovery job
  Worker->>Notify: Dunning / payment updates
  Worker->>Unified: Post status to accounting/CRM

sequenceDiagram
  autonumber
  actor Vendor
  actor Approver
  participant Email as Email Portal
  participant Storage as Oppulence Storage
  participant BillFlow
  participant Sync as Stripe Sync Engine
  participant Unified as Developer Platform
  participant Accounting as QBO Xero NetSuite
  participant Bank as Bank ACH

  Vendor->>Email: Send invoice
  Email->>Storage: Forward/upload
  Storage-->>BillFlow: Extracted invoice data
  BillFlow->>Sync: Match to Stripe charges
  BillFlow->>Approver: Request approval
  Approver->>BillFlow: Approve / reject
  BillFlow->>Unified: Initiate payment + sync
  Unified->>Bank: Pay vendor
  Unified->>Accounting: Create/update bill