How to vibe codeLeadpages

Prerequisites

• Node.jsfree

  Runtime for local development and package management

• GitHubfree

  Source control and deployment pipeline integration

AI coding tools

• Claude Code

  Best-in-class multi-file agentic coding agent for scaffolding complex layout engines and edge middleware

• Cursor

  Ideal for iterative UI work and precise CSS grid component adjustments

Build guide

1. 01Scaffold Next.js App & Database Schema

   Initialize the Next.js project with Tailwind CSS, configure Turso database tables for pages, variants, leads, and analytics events, and set up better-auth.

   Initialize a new Next.js 16 project with Tailwind CSS and TypeScript. Set up Turso for database storage using the libSQL client. Create database schemas for users, pages (containing slug, user_id, html_content, and json_ast), page_variants (for A/B testing split weights), form_submissions, and analytics_events. Integrate better-auth for secure user authentication supporting email/password sign-in. Ensure all database migration scripts are written cleanly and tested locally.

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2. 02Build Prompt-to-Page AI Generator

   Integrate the Vercel AI SDK and Anthropic API to generate responsive, branded landing page HTML/Tailwind templates from simple user text prompts.

   Build an AI page generation module using the Vercel AI SDK and Anthropic API. Create an API endpoint '/api/generate-page' that accepts a user prompt and optional brand kit parameters (primary color, font family). The LLM must output a clean, semantic HTML structure styled with Tailwind CSS classes, complete with a hero section, feature grid, testimonial block, and an embedded lead capture form. Include a schema validator to ensure the generated markup contains no malicious scripts and adheres to mobile-responsive standards.

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3. 03Implement Zero-Flicker Edge A/B Testing Middleware

   Create Cloudflare Workers / Next.js edge middleware that intercepts incoming requests, assigns variant cookies instantly, and returns the correct variant HTML without client-side flicker.

   Develop edge middleware in Next.js that handles dynamic A/B test routing for published landing pages. When a visitor requests a custom page slug, the middleware inspects active variants stored in Turso, assigns a variant cookie using weighted probabilities if none exists, and injects the corresponding variant HTML payload directly at the edge before rendering, guaranteeing zero client-side layout shift or rendering flicker. Record an impression event for the assigned variant.

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4. 04Construct Multi-Armed Bandit Traffic Routing (Smart Traffic)

   Implement a statistical multi-armed bandit routing algorithm that shifts traffic dynamically to higher-converting page variants based on conversion rates.

   Implement a Multi-Armed Bandit (Thompson Sampling) traffic allocation algorithm for landing page variants. Create a background service or edge function that evaluates conversion metrics (impressions vs. form submissions) for each page variant daily. Update the traffic split weights dynamically so that higher-converting variants receive a progressively higher percentage of incoming visitors, maximizing total conversions automatically.

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5. 05Add Heatmap Telemetry and Form Collection

   Build a lightweight client-side script that captures click coordinates and scroll depths using navigator.sendBeacon, alongside robust form capture endpoints.

   Create a lightweight, non-blocking telemetry script injected into published pages that tracks click coordinates (X, Y mapped to DOM selectors) and maximum scroll depth percentage. Use 'navigator.sendBeacon' to batch and transmit telemetry data to '/api/telemetry' without impacting page load speed. Build the backend aggregator to store click and scroll distributions, and create an admin dashboard view displaying click heatmaps overlaid on the page preview.

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6. 06Integrate Dynamic Text Replacement & Webhooks

   Implement URL query parameter parsing to enable ad-to-page message matching and webhook dispatching for captured leads.

   Build a Dynamic Text Replacement (DTR) engine that parses incoming URL search parameters (e.g., ?keyword=running+shoes) and swaps matching placeholders in the page headline and CTA copy at request time. Create a webhook integration service that dispatches captured lead form submissions securely to external endpoints (such as Slack or custom webhooks) instantly upon submission.

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Cost vs paying for Leadpages