FastAPI Scaffolding

FastAPI Scaffolding

Instructions

1. Create or update the backend folder structure with these directories:

   • app/
     • main.py (entry point with health endpoint)
     • routers/ (for API endpoints)
     • services/ (for business logic)
     • schemas/ (for Pydantic models)
     • deps/ (for dependency injection)

2. Generate main.py with:

   • FastAPI app initialization
   • Health check endpoint at GET /health
   • CORS middleware configuration
   • Include routers setup

3. Create a chat router placeholder in routers/chat.py

   • Include basic route registration
   • Setup for POST /chat endpoint

4. Ensure proper Uvicorn configuration in requirements.txt and startup command

   • Include uvicorn, fastapi in dependencies
   • Provide proper startup command: uvicorn app.main:app --host 0.0.0.0 --port 7860

5. Follow deterministic, clean Python code standards

   • Use proper type hints
   • Follow PEP 8 style guidelines
   • Include proper error handling

Examples

Input: "Create FastAPI backend structure" Output: Creates the complete directory structure with main.py containing:

from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware
from app.routers import chat

app = FastAPI(title="Physical AI & Humanoid Robotics RAG API")

app.add_middleware(
    CORSMiddleware,
    allow_origins=["*"],  # Configure appropriately for production
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)

@app.get("/health")
async def health_check():
    return {"status": "healthy"}

app.include_router(chat.router, prefix="/api/v1")