Architecture

src/apowerb/
├── main.py              FastAPI entry point, middleware, startup
├── models.py            SQLAlchemy ORM models
│
├── auth/                Authentication and MFA
├── users/               User management
├── routers/             API endpoints
│   └── webhook_handlers/  Gmail and Outlook push handlers
├── integrations/        Third-party OAuth (Google, Microsoft, GitHub, Slack)
├── core/                Business logic — agents, ADK execution, hub, RAG streaming
│   └── extensions/      Extension loader and registry
├── tools_store/         Tool registry and the tool portfolio
├── skills_store/        Skills
├── agent_store/         Agent persistence
├── sqlgen/              Text-to-SQL generation
├── bi/                  Datasets, charts, dashboards
├── scheduler/           Orchestrator clients (Mage, th2etl), webhook renewal,
│                        background runs, backlog worker
├── storage/             S3 abstraction
├── helpers/             Database, security, encryption, notification bus, migrations
├── schema/              Pydantic schemas
├── configs/             Settings, model pricing, logging
├── middleware/
└── cli/                 Typer commands