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```typescript
// AI Dev Tool: PostgreSQL Vector Search Extension for Hono Cloudflare Workers
// ========================================================================
// This is a production-ready developer code asset that integrates PostgreSQL
// Vector Search Extension with Hono Cloudflare Workers for efficient and
// scalable search functionality.

import { Hono } from 'hono';
import { PostgreSQL } from 'postgres';
import { VectorSearch } from 'postgresql-vector-search';

// Define the PostgreSQL connection parameters
const POSTGRES_HOST = 'your_host';
const POSTGRES_PORT = 5432;
const POSTGRES_USER = 'your_user';
const POSTGRES_PASSWORD = 'your_password';
const POSTGRES_DB = 'your_db';

// Define the Hono Cloudflare Workers app
const app = new Hono();

// Define the PostgreSQL client
const postgres = new PostgreSQL({
  host: POSTGRES_HOST,
  port: POSTGRES_PORT,
  user: POSTGRES_USER,
  password: POSTGRES_PASSWORD,
  database: POSTGRES_DB,
});

// Define the Vector Search extension
const vectorSearch = new VectorSearch(postgres);

// Define the search API endpoint
app.get('/search', async (c) => {
  // Get the search query from the request parameters
  const query = c.req.query('q');

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