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```python
# AI Dev Tool: PostgreSQL Vector Search Extension with Hono Cloudflare Workers
# Description: A production-ready starter boilerplate for building scalable vector search applications
# using PostgreSQL and Hono Cloudflare Workers.
import os
import psycopg2
import numpy as np
from hono import Hono
from typing import List, Dict
# Define the PostgreSQL connection parameters
POSTGRES_HOST = os.environ.get('POSTGRES_HOST')
POSTGRES_DB = os.environ.get('POSTGRES_DB')
POSTGRES_USER = os.environ.get('POSTGRES_USER')
POSTGRES_PASSWORD = os.environ.get('POSTGRES_PASSWORD')
# Define the Hono Cloudflare Workers configuration
HONO_WORKER_URL = os.environ.get('HONO_WORKER_URL')
HONO_WORKER_TOKEN = os.environ.get('HONO_WORKER_TOKEN')
# Create a PostgreSQL connection
def create_postgres_connection() -> psycopg2.Connection:
"""
Creates a connection to the PostgreSQL database.
# ... full runnable version includes tests & documentation
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