# sanjay0208/aipos architecture

> Architecture diagram of the GitHub repository sanjay0208/aipos, generated by GitDiagram from its file tree, README and a sample of source files (last updated 2026-08-14). It is an AI-made overview: check details against the source.

- Interactive diagram: https://gitdiagram.com/sanjay0208/aipos
- Repository: https://github.com/sanjay0208/aipos

## Overview

#### 1. Purpose and Current Scope
AIPOS is intended as an AI-native personal operating system for memory, planning, knowledge, automation, and third-party integrations. The checked-in implementation is currently a small FastAPI backend foundation: health routing, application configuration/logging, and SQLAlchemy user persistence. The README’s broader React, AI, memory, planner, and integration architecture is aspirational rather than present in this tree.

#### 2. Backend Entry Point and API Composition
The runnable backend entry point is `backend/app/main.py`, which should construct the FastAPI application and attach its API router. Routing is layered from the application-level router through versioned endpoints:
- `backend/app/api/router.py`
- `backend/app/api/v1/__init__.py`
- `backend/app/api/v1/health.py`

The health endpoint is the only visible public capability, establishing the initial API/versioning boundary for future domains.

#### 3. Duplicate Application Package Boundary
Two near-identical package trees exist:
- `app/api/router.py`
- `app/core/config.py`
- `backend/app/api/router.py`

Only `backend/app/` contains `main.py`, database code, and Python dependency manifests, so it appears to be the executable backend. The top-level `app/` is likely an incomplete duplicate or an earlier scaffold. Engineers should avoid adding parallel features to both until ownership/import behavior is reconciled.

#### 4. Core Runtime and Cross-Cutting Services
Configuration and logging are centralized in:
- `backend/app/core/config.py`
- `backend/app/core/logging.py`
- `backend/app/main.py`

These form the runtime boundary between environment-driven deployment settings and application code. `.env.example` indicates environment configuration is expected; `backend/pyproject.toml` and `backend/requirements.txt` define the Python/FastAPI runtime dependency boundary.

#### 5. Persistence Layer
Database concerns are separated from HTTP handlers:
- `backend/app/database/base.py`
- `backend/app/database/session.py`
- `backend/app/database/models/user.py`

`base.py` provides SQLAlchemy model metadata/base infrastructure; `session.py` owns database engine/session lifecycle; `user.py` is the initial durable domain model. API/domain services should depend on sessions/models through this layer rather than create database connections inside route handlers.

#### 6. Primary Control and Data Flow
Current request flow is: process starts in `backend/app/main.py` → FastAPI includes `backend/app/api/router.py` → versioned routing dispatches to `backend/app/api/v1/health.py` → response returns through FastAPI middleware/logging.

The expected persistence flow for future authenticated/domain APIs is: versioned handler → service/domain logic not yet present → SQLAlchemy session from `backend/app/database/session.py` → mapped models such as `backend/app/database/models/user.py` → PostgreSQL. No authentication, AI orchestration, Redis, Qdrant, MinIO, or external API adapters are implemented in the supplied tree.

#### 7. Deployment and External Infrastructure
`docker-compose.yml` is the repository’s visible local orchestration boundary. The stated target stack includes PostgreSQL and Redis, with Qdrant/MinIO and providers such as Gmail, Calendar, GitHub, Maps, and Weather planned, but no corresponding service clients or integration modules are present. Docker Compose should therefore be treated as infrastructure scaffolding, not evidence that those product stages are implemented.

Main entry points: [`backend/app/main.py`](https://github.com/sanjay0208/aipos/blob/main/backend/app/main.py) (FastAPI app), [`backend/app/database/session.py`](https://github.com/sanjay0208/aipos/blob/main/backend/app/database/session.py) (Database sessions), [`backend/app/api/router.py`](https://github.com/sanjay0208/aipos/blob/main/backend/app/api/router.py) (API router), [`backend/app/core/logging.py`](https://github.com/sanjay0208/aipos/blob/main/backend/app/core/logging.py) (Logging)

## Diagram (Mermaid)

```mermaid
flowchart TD

subgraph group_runtime["Backend Runtime"]
  node_main["FastAPI app<br/>application entry<br/>[main.py]"]
  node_config["Configuration<br/>runtime config<br/>[config.py]"]
  node_logging["Logging<br/>cross-cutting service<br/>[logging.py]"]
  node_dependencies["Python dependencies<br/>runtime manifest<br/>[pyproject.toml]"]
end

subgraph group_api["HTTP API"]
  node_api_router["API router<br/>route composition<br/>[router.py]"]
  node_v1_router["Versioned API<br/>v1 routing boundary<br/>[__init__.py]"]
  node_health["Health endpoint<br/>public endpoint<br/>[health.py]"]
end

subgraph group_persistence["Persistence"]
  node_db_base["SQLAlchemy base<br/>model metadata<br/>[base.py]"]
  node_db_session["Database sessions<br/>engine and session lifecycle<br/>[session.py]"]
  node_user_model["User model<br/>durable domain model<br/>[user.py]"]
end

subgraph group_infra["Local Infrastructure"]
  node_postgres[("PostgreSQL<br/>database service")]
  node_compose["Docker Compose<br/>local orchestration<br/>[docker-compose.yml]"]
end

node_duplicate_app["Top-level app scaffold<br/>duplicate package boundary<br/>[router.py]"]

node_dependencies -.->|"defines runtime"| node_main
node_config -->|"configures"| node_main
node_logging -->|"observes"| node_main
node_main -->|"includes"| node_api_router
node_api_router -->|"dispatches"| node_v1_router
node_v1_router -->|"routes to"| node_health
node_health -.->|"request logging"| node_logging
node_db_session -->|"uses metadata"| node_db_base
node_user_model -->|"maps through"| node_db_base
node_db_session -->|"persists"| node_user_model
node_db_session -.->|"connects to"| node_postgres
node_compose -.->|"orchestrates"| node_postgres
node_duplicate_app -.->|"parallel scaffold"| node_api_router

click node_main "https://github.com/sanjay0208/aipos/blob/main/backend/app/main.py"
click node_config "https://github.com/sanjay0208/aipos/blob/main/backend/app/core/config.py"
click node_logging "https://github.com/sanjay0208/aipos/blob/main/backend/app/core/logging.py"
click node_api_router "https://github.com/sanjay0208/aipos/blob/main/backend/app/api/router.py"
click node_v1_router "https://github.com/sanjay0208/aipos/blob/main/backend/app/api/v1/__init__.py"
click node_health "https://github.com/sanjay0208/aipos/blob/main/backend/app/api/v1/health.py"
click node_db_base "https://github.com/sanjay0208/aipos/blob/main/backend/app/database/base.py"
click node_db_session "https://github.com/sanjay0208/aipos/blob/main/backend/app/database/session.py"
click node_user_model "https://github.com/sanjay0208/aipos/blob/main/backend/app/database/models/user.py"
click node_compose "https://github.com/sanjay0208/aipos/blob/main/docker-compose.yml"
click node_dependencies "https://github.com/sanjay0208/aipos/blob/main/backend/pyproject.toml"
click node_duplicate_app "https://github.com/sanjay0208/aipos/blob/main/app/api/router.py"

classDef toneNeutral fill:#f8fafc,stroke:#334155,stroke-width:1.5px,color:#0f172a
classDef toneBlue fill:#dbeafe,stroke:#2563eb,stroke-width:1.5px,color:#172554
classDef toneAmber fill:#fef3c7,stroke:#d97706,stroke-width:1.5px,color:#78350f
classDef toneMint fill:#dcfce7,stroke:#16a34a,stroke-width:1.5px,color:#14532d
classDef toneRose fill:#ffe4e6,stroke:#e11d48,stroke-width:1.5px,color:#881337
classDef toneIndigo fill:#e0e7ff,stroke:#4f46e5,stroke-width:1.5px,color:#312e81
classDef toneTeal fill:#ccfbf1,stroke:#0f766e,stroke-width:1.5px,color:#134e4a
class node_main,node_config,node_logging,node_dependencies toneBlue
class node_api_router,node_v1_router,node_health toneAmber
class node_db_base,node_db_session,node_user_model toneMint
class node_postgres,node_compose toneRose
class node_duplicate_app toneNeutral
```

## Components

### Backend Runtime

- [FastAPI app](https://github.com/sanjay0208/aipos/blob/main/backend/app/main.py): application entry · Executable backend composition point. · `backend/app/main.py`
- [Configuration](https://github.com/sanjay0208/aipos/blob/main/backend/app/core/config.py): runtime config · `backend/app/core/config.py`
- [Logging](https://github.com/sanjay0208/aipos/blob/main/backend/app/core/logging.py): cross-cutting service · `backend/app/core/logging.py`
- [Python dependencies](https://github.com/sanjay0208/aipos/blob/main/backend/pyproject.toml): runtime manifest · `backend/pyproject.toml`

### HTTP API

- [API router](https://github.com/sanjay0208/aipos/blob/main/backend/app/api/router.py): route composition · `backend/app/api/router.py`
- [Versioned API](https://github.com/sanjay0208/aipos/blob/main/backend/app/api/v1/__init__.py): v1 routing boundary · `backend/app/api/v1/__init__.py`
- [Health endpoint](https://github.com/sanjay0208/aipos/blob/main/backend/app/api/v1/health.py): public endpoint · Only implemented public capability. · `backend/app/api/v1/health.py`

### Persistence

- [SQLAlchemy base](https://github.com/sanjay0208/aipos/blob/main/backend/app/database/base.py): model metadata · `backend/app/database/base.py`
- [Database sessions](https://github.com/sanjay0208/aipos/blob/main/backend/app/database/session.py): engine and session lifecycle · `backend/app/database/session.py`
- [User model](https://github.com/sanjay0208/aipos/blob/main/backend/app/database/models/user.py): durable domain model · `backend/app/database/models/user.py`

### Local Infrastructure

- **PostgreSQL**: database service · Target durable store for domain APIs.
- [Docker Compose](https://github.com/sanjay0208/aipos/blob/main/docker-compose.yml): local orchestration · Infrastructure scaffolding, not implemented product stages. · `docker-compose.yml`

### Other components

- [Top-level app scaffold](https://github.com/sanjay0208/aipos/blob/main/app/api/router.py): duplicate package boundary · Incomplete parallel package; avoid adding mirrored features. · `app/api/router.py`

## Connections

- Python dependencies → FastAPI app: defines runtime
- Configuration → FastAPI app: configures
- Logging → FastAPI app: observes
- FastAPI app → API router: includes
- API router → Versioned API: dispatches
- Versioned API → Health endpoint: routes to
- Health endpoint → Logging: request logging
- Database sessions → SQLAlchemy base: uses metadata
- User model → SQLAlchemy base: maps through
- Database sessions → User model: persists
- Database sessions → PostgreSQL: connects to
- Docker Compose → PostgreSQL: orchestrates
- Top-level app scaffold → API router: parallel scaffold