PRD Generator — Multi-Model Edition

Status: Polished portfolio project. Originally built late 2025, refreshed for May 2026 (current models, dependency hygiene). Functional locally; not deployed and not actively maintained — model IDs and SDK APIs will drift over time.

A Next.js app for generating Product Requirements Documents through a chat interface, with side-by-side comparison across Claude, GPT, Gemini, and Grok. Pick your favourite model's output, edit individual sections, export as Markdown or PDF.

Features

• Conversational PRD generation — short clarifying-question chat, then one-shot PRD output
• Multi-model comparison — fan out the same prompt to up to 4 models in parallel and pick the winner
• Section-level editing — refine a single section without re-running the whole PRD
• Multi-modal input — text plus image uploads (sketches, wireframes, screenshots)
• Markdown + PDF export
• Credit system + Stripe checkout — free daily session, paid packs (Beer Edition pricing)

Tech stack

• Frontend: Next.js 15, React 19, Tailwind CSS 4
• Backend: Next.js API routes
• Database: SQLite via Prisma (zero-setup local demo — change provider in prisma/schema.prisma to postgresql for production)
• Auth: NextAuth v5 (beta) with GitHub OAuth
• AI providers: Anthropic, OpenAI, Google Gemini, xAI Grok
• Payments: Stripe

Quick start

git clone https://github.com/drftstatic/PRD_Generator.git
cd PRD_Generator
npm install
cp .env.example .env       # then edit — see "Required env vars" below
npx prisma migrate dev --name init
npm run dev

Open http://localhost:3000.

Required env vars

The minimum to get a working chat + one-model generation:

• NEXTAUTH_SECRET — openssl rand -base64 32
• GITHUB_CLIENT_ID + GITHUB_CLIENT_SECRET — register an OAuth app with callback http://localhost:3000/api/auth/callback/github
• One of: ANTHROPIC_API_KEY, OPENAI_API_KEY, GOOGLE_AI_API_KEY, XAI_API_KEY

Stripe keys are optional unless you want to test paid credit purchases. See .env.example for the full list.

Project structure

prisma/
  schema.prisma          # SQLite schema (User, PRDSession, PRD, Credit, etc.)
src/
  app/
    api/                 # auth, generate-prd, conversation, credits, checkout, webhooks, upload
    page.tsx             # chat UI
    prds/[sessionId]/    # PRD comparison + section editor
  components/            # PRDViewer, SectionEditor, ImageUpload
  hooks/                 # useCredits, usePRDGeneration
  lib/
    ai-providers.ts      # multi-provider orchestration
    prd-template.ts      # PRD structure + system prompt
    pdf-generator.ts     # Puppeteer-based PDF export
    auth.ts, prisma.ts
  config/
    models.json          # Model registry — edit here to add/remove models

Updating the model registry

All available models are listed in src/config/models.json. To add or swap a model, edit the JSON — no code changes required:

{
  "providers": {
    "anthropic": {
      "models": ["claude-opus-4-7", "claude-sonnet-4-6"],
      "display_names": ["Claude Opus 4.7", "Claude Sonnet 4.6"],
      "api_key_env": "ANTHROPIC_API_KEY"
    }
  }
}

The current registry was last verified May 2026. Provider model IDs drift quickly — check each provider's docs before deploying anything that depends on this code.

Pricing tiers (Beer Edition)

Tier	Sessions	Price	Per session
On the House	1/day	Free	$0
Tall Boy	1	$2	$2.00
Sixer	6	$6	$1.00
Twelve Pack	12	$10	$0.83
Case	24	$18	$0.75

One session = up to 4 PRD generations across different models.

API routes

Route	Purpose
POST /api/auth/[...nextauth]	NextAuth
POST /api/conversation	Clarifying-question chat
POST /api/generate-prd	Multi-model PRD generation
GET/POST /api/credits	Balance + claim daily free
POST /api/checkout	Stripe checkout session
POST /api/webhooks/stripe	Stripe event handler
POST /api/upload	Image uploads
GET /api/sessions/[sessionId]	Session state
POST /api/prds/[prdId]/regenerate-section	Section-level edit

PRD template

Generated PRDs follow this structure:

1. Product Name & Overview
2. Problem Statement
3. Target Users
4. Goals & Success Metrics
5. User Stories / Use Cases
6. Functional Requirements
7. Technical Considerations
8. Out of Scope
9. Open Questions / Risks

Notes for anyone forking this

• This was built as an exploration of multi-model orchestration patterns and isn't actively maintained.
• Model IDs in src/config/models.json and src/app/api/conversation/route.ts will go stale — verify against each provider's docs.
• The Stripe integration is wired but has only been smoke-tested locally with the Stripe CLI.
• puppeteer is a heavy dep (~170MB) and won't deploy to Vercel as-is — for serverless deploys, swap to @sparticuz/chromium or a hosted PDF service.
• For production, change Prisma's provider from sqlite to postgresql and run a fresh migration.

License

MIT — see LICENSE.

---

Built with Claude Code.