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Preview Code

```python
# AI Dev Tool: Cloudflare Worker PostgreSQL Vector Search Extension
# Description: A production-ready starter boilerplate for building scalable vector search applications
# using Cloudflare Workers, PostgreSQL, and the Hono framework.

import os
import json
from typing import Dict, List
from hone import Hono
from hone.plugins import PostgreSQLPlugin
from cloudflare import CloudflareWorker

# Define the PostgreSQL connection settings
POSTGRESQL_HOST = os.environ.get("POSTGRESQL_HOST")
POSTGRESQL_PORT = os.environ.get("POSTGRESQL_PORT")
POSTGRESQL_USER = os.environ.get("POSTGRESQL_USER")
POSTGRESQL_PASSWORD = os.environ.get("POSTGRESQL_PASSWORD")
POSTGRESQL_DB = os.environ.get("POSTGRESQL_DB")

# Define the Cloudflare Worker settings
CLOUDFLARE_ACCOUNT_ID = os.environ.get("CLOUDFLARE_ACCOUNT_ID")
CLOUDFLARE_API_TOKEN = os.environ.get("CLOUDFLARE_API_TOKEN")

# Create a new Hono instance with PostgreSQL plugin
hono = Hono()
# ... full runnable version includes tests & documentation