⚡ Live Sandbox: AI Dev Tool: Hono Cloudflare Workers (kpeq)

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```python
# AI Dev Tool: Edge Function Vector Search API
# Description: A production-ready Edge Function API for vector search using Cloudflare Workers, Hono, and PostgreSQL.

import os
import json
from pydantic import BaseModel
from typing import List, Optional
from hono import Hono
from cloudflare import Worker
from psycopg2 import connect
from psycopg2.extras import DictCursor

# Define the vector search request model
class VectorSearchRequest(BaseModel):
    """Vector search request model"""
    query: str
    limit: int = 10
    offset: int = 0

# Define the vector search response model
class VectorSearchResponse(BaseModel):
    """Vector search response model"""
    results: List[dict]
    count: int

# Initialize the Hono app
app = Hono()

# Initialize the PostgreSQL connection
conn = connect(
    host=os.environ['PG_HOST'],
    database=os.environ['PG_DATABASE'],
    user=os.environ['PG_USER'],
    password=os.environ['PG_PASSWORD']
)
cur = conn.cursor(cursor_factory=DictCursor)

# Define the vector search function
def vector_search(query: str, limit: int = 10, offset: int = 0) ->

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