Generate a full SaaS starter spec for a coding agent

Write the spec that makes Cursor, Claude Code or Codex build the right thing.

You'll attach

Text only

Works with

ChatGPTClaudeGeminiGrokCopilotGrok Bot

How to use it

1. Open chatgpt.com or claude.ai (or another AI listed here).
2. Fill in the highlighted blanks ([PRODUCT IDEA], [WHO]) below, or edit them after pasting.
3. Copy the prompt, paste it into the chat and send.
4. Then open the repo in Cursor, Claude Code or Codex and say: "Read SPEC.md and build milestone 1."

Help me write a build spec for a coding agent. The product: [PRODUCT IDEA]. Users: [WHO].

Interview me first with up to 8 short questions about the must-have features, data, auth, payments and hosting. Then write a spec with:
- One-paragraph goal and non-goals
- User stories (max 10) with acceptance criteria
- Data model (tables, fields, relations)
- Pages and API routes
- Tech stack with reasons (default: Next.js, Postgres, Stripe)
- A build order in small, testable milestones
Format it as a markdown file I can save as SPEC.md in my repo.