⚡ Live Sandbox: AI Dev Tool: AGENTSmd AINative SaaS (5h1p)

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```python
# AI Dev Tool: FastAPI Pydantic v2 Micro-SaaS Boilerplate
# ======================================================

"""
Production-ready FastAPI Pydantic v2 Micro-SaaS boilerplate.
Includes support for PostgreSQL Vector Search Extension and Cloudflare Workers D1.
"""

from fastapi import FastAPI, Depends
from fastapi.responses import JSONResponse
from pydantic import BaseModel
from typing import List, Optional
import psycopg2
import psycopg2.extras
import json
from cloudflare import Cloudflare

# Initialize FastAPI app
app = FastAPI()

# Define Pydantic models
class User(BaseModel):
    """User model"""
    id: int
    name: str
    email: str

class Item(BaseModel):
    """Item model"""
    id: int
    name: str
    description: str

# Define PostgreSQL database connection
def get_db():
    """Get PostgreSQL database connection"""
    conn = psycopg2.connect(
        host="localhost",
        database="mydatabase",
        user="myuser",
        password="mypassword"
    )
    return conn

# Define Cloudflare Workers D1 client
def get_cf_client():
    """Get Cloudflare Workers D1 client"""
    cf = Cloud

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