How to vibe codeHunter

Prerequisites

• Node.jsfree

  Required runtime for running Next.js and TypeScript backend logic

• GitHubfree

  Code repository and deployment source control

• Resendfree tier available

  Transactional email API for sending application alerts

AI coding tools

• Claude Code

  Best-in-class terminal coding agent for scaffolding multi-file Next.js apps, writing complex backend SMTP validation scripts, and debugging database queries.

• Cursor

  Ideal for fine-tuning React UI components, Tailwind tables, and sequence builder interfaces with side-by-side diff reviews.

Build guide

1. 01Scaffold Next.js App and Database Schema

   Initialize the Next.js project with Tailwind CSS, shadcn/ui, and configure Turso SQLite connection for users, domains, leads, and sequences.

   Create a new Next.js 16 project with TypeScript, Tailwind CSS, and App Router. Set up Turso (libSQL) database client configuration with Drizzle ORM. Define database schemas for users, domains, contacts, email_verifications, and outreach_sequences with proper relational foreign keys, indexes, and timestamps. Implement better-auth for email/password authentication.

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2. 02Build Domain Search and Email Pattern Engine

   Implement the core search logic that accepts a company website, parses public DNS MX records, and applies common email naming patterns (e.g., {first}.{last}@domain.com).

   Build a Domain Search feature in Next.js. Create a server action that takes a domain name, checks a local cache table, and if missing, performs a basic web fetch or uses an AI extraction tool to identify employee names and roles. Implement pattern matching algorithms to generate probable email permutations (e.g., first.last@domain, flast@domain) and save discovered contacts to the database.

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3. 03Implement Email Verifier with SMTP Handshake

   Develop a backend verification utility that checks syntax, queries MX records, and connects to target mail servers to verify mailbox existence.

   Create an Email Verifier module using Node.js net/dns modules. The function must: 1. Validate email syntax with regex; 2. Query MX records for the domain; 3. Connect to the primary mail server via SMTP port 25; 4. Issue HELO, MAIL FROM, and RCPT TO commands to check if the mailbox responds with 250 OK without sending an actual email. Handle timeouts, greylisting gracefully, and return status codes (valid, invalid, risky, unknown) while updating the user's credit quota.

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4. 04Build Lead Discover and Search Interface

   Create a searchable dashboard view for exploring saved leads with filtering by department, location, and seniority.

   Build a Discover leads dashboard page using shadcn/ui data tables and filters. Include multi-select filters for departments, countries, and seniorities. Connect the table to a backend API route that queries the contacts table with dynamic SQL WHERE clauses, pagination, and sorting. Add a 'Save to Leads' button that adds records to the user's personal list.

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5. 05Construct Cold Email Sequence Manager

   Build an outreach sequence creator supporting multi-step campaigns, delays, tracking, and recipient limits.

   Build a Sequences feature in the Next.js app. Create database tables for sequences, sequence_steps (step number, delay days, email template subject/body), and sequence_recipients (tracking status: queued, sent, opened, replied). Build a visual builder UI allowing users to add steps and personalize templates using variables like {{first_name}} and {{company}}.

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6. 06Implement Background Sequence Dispatcher

   Set up a robust cron worker or background job runner to dispatch scheduled sequence emails respecting daily sending quotas.

   Write a background worker script using Node.js and node-cron (to be deployed on Railway) that polls the sequence_recipients table every minute for due steps. The worker must fetch active sequence messages, personalize them with recipient data, dispatch them via configured SMTP/Resend integrations, log delivery status, and handle rate-limiting and daily send caps per account.

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Cost vs paying for Hunter