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Give your AI builder a blueprint. Know what to ask it next.

Describe your app in your own words. We draw up a blueprint Lovable, Claude Code, Cursor or Codex can follow, then Build guidance takes you through it one task at a time.

  1. 1Describe
  2. 2
  3. 3
  4. 4

Step 1 of 4

A sentence or two is enough.

Or start from an example:

Free. Usually under 20 seconds. No account needed.

Your AI builder can't read your mind, so it guesses.

Ask an AI tool to “build me a booking app” and it has to invent dozens of answers you never gave it. It picks something quietly and moves on. You find out later, when a booking vanishes or a feature you never wanted appears.

VibeToSpec puts those questions in front of you first, so the answers in your app are yours.

  • Do barbers approve each booking?

    What an AI builder guesses

    I'll assume they don't.

    What your blueprint says

    Yes. A booking is a request until the barber approves it.

  • Two customers want 3pm. Who gets it?

    What an AI builder guesses

    Whoever clicks first, I suppose.

    What your blueprint says

    The first request holds the slot while the barber decides.

  • Should it take payments?

    What an AI builder guesses

    Let's build a whole online shop.

    What your blueprint says

    Not in version 1. Customers pay in the shop.

An example for a barber booking app. Dashed lines are guesses; solid lines are decisions you made.

What happens after you click “Scan my idea”

Five stations, in order. You can stop after any of them: scanning, understanding and deciding are free.

  1. 1

    Describe

    You · about a minute

    Write your idea the way you'd explain it to a friend, or paste the notes you already have. No templates, no jargon.

    What do you want to build?

    An app where customers book a barber and a time slot, barbers approve each request, plus loyalty points…

  2. 2

    Understand

    Us, then you · under 20 seconds to read it

    We list what we understood. Lines taken from your words quote them exactly; lines we inferred are marked so you can check them. Fix, remove or add anything.

    • Barbers approve each booking request.

      You saidbarbers approve each request

    • A barber can decline a request.

      AI inferred · check it

  3. 3

    Decide

    You · a few minutes

    See your Build Complexity Score, choose what to leave out of version 1, and answer the questions an AI would otherwise guess. Anything you leave open stays visibly open.

    Loyalty points

    Needs a points ledger and rules

    52→24Build Complexity Score, version 1

  4. 4

    Blueprint

    Us · about a minute

    Seven documents your AI builder reads before it writes code, plus the Build Review. The preview is free; the full blueprint is $19, one-time.

    • PRD.md
    • schema.prisma
    • tasks.md
    • ACCEPTANCE.md
    • EDGE_CASES.md
    • DECISIONS.md
    • AGENTS.md
    • Build Review
  5. 5

    Build

    You and your AI builder, with Build guidance

    Copy one instruction at a time into Lovable, Claude Code, Codex or Cursor. Paste back its reply or error and get the next action, then check the step against your plan before you move on. Your first task comes with the blueprint; Build guidance, $19 a month, covers the rest.

    Task 1 of 5

    Customers can request a time slot

    Your builder says it's done reported

    You checked it yourself checked

Specimens show the barber booking example.

What's in the box: your blueprint's parts list

A folder of files you add to your project. Your AI builder reads them before it writes a line of code. You don't have to read them, but everything is in plain English if you want to.

  • The product plan

    PRD.md

    What your app does in version 1, its journeys and screens, and just as important, what it doesn't do.

    Saves you from: features you never asked for

  • The data map

    schema.prisma or your stack's equivalent

    Everything your app keeps, like customers, bookings or payments, and how they connect.

    Saves you from: a database that quietly breaks

  • The build order

    tasks.md

    A step-by-step list, so your AI builds one thing at a time instead of everything at once.

    Saves you from: half-finished everything

  • The definition of done

    ACCEPTANCE.md

    Plain-English checks for every feature. Nothing counts as finished until it passes them.

    Saves you from: “done” that isn't

  • The what-ifs

    EDGE_CASES.md

    What should happen when two customers want the same slot, a payment fails, or someone tries to see another person's data.

    Saves you from: bugs your customers find first

  • Your decisions, on record

    DECISIONS.md

    Every choice you made, marked as yours, and every question still open. Your AI treats your decisions as rules.

    Saves you from: your idea being quietly rewritten

  • The rulebook

    AGENTS.md with CLAUDE.md and Copilot instructions

    Tells any AI builder how to work on your project: what's decided, what's off-limits, and when a task is truly done.

    Saves you from: an AI that improvises

  • The Build Review

    runs on GitHub

    An automatic check each time your AI builder saves a change: does the work still match your blueprint and your decisions?

    Saves you from: trusting your AI blindly

For a fictional product. No sign-up needed.

You don't have to read code to know when it drifts.

Each time your AI builder saves a change on GitHub, the Build Review runs your project's own checks and compares the work with your blueprint. You get a plain-English verdict: passed, or what went wrong and where.

  • Features you left out, creeping back in
  • New kinds of data your blueprint never approved
  • Changes to your plan or your decisions
  • Security shortcuts, like trusting the browser about who's signed in
  • Failing tests and broken builds

It's included in every blueprint. It catches drift from your plan; it doesn't prove your app works. Checking that it does what you need is still yours to do.

Build Review · change 24

1 blocked · 2 to review

  • Passed

    Type check: passed

  • Passed

    Tests: passed

  • Blocked

    Scope: Builds “Loyalty points”, which you left out of version 1.

    In plain words: Your AI started a feature you said no to.

  • Review

    Data: Adds an Invoice table that isn't in your data map.

    In plain words: It started storing a new kind of data without asking.

  • Review

    Security: saveProfile() trusts the userId sent by the browser.

    In plain words: Someone could act as another customer.

  • Passed

    Your decisions: unchanged

An example review for the barber app.
We pointed the Build Review at an early version of VibeToSpec's own code. It flagged the same eight functions behind a paywall bypass that our security audit had found.
From building VibeToSpec itself

Start with a blueprint. Keep building with guidance.

Scanning is free. Your blueprint is $19 once, complete on its own and yours to keep. When you start building, Build guidance is $19 a month and renews until you cancel.

Free

Get your idea straight.

$0

  • Scan as many ideas as you like
  • What we understood, for you to correct
  • Build Complexity Score, explained
  • What to leave out of version 1
  • A preview of your blueprint
Scan my idea

Blueprint

Start here

Everything your AI builder needs for one idea.

$19one-time, per blueprint

  • 7 documents: plan, data, build order, AI rules, done-checks, edge cases, decisions
  • Build Review on every change to your code
  • Start building in Lovable, Claude Code, Codex or Cursor
  • Your first workflow planned, with its first task
  • Yours to keep: no account or subscription needed
Start with your idea

Build guidance

When you build

For building it, one task at a time.

$19a month, renews until you cancel

  • The next instruction for every task, written from your blueprint
  • 50 result reviews each billing period: paste your builder's reply or error, get what it means and one next action
  • 3 workflow plans each billing period, for a new or updated workflow
  • Your decisions, tasks and progress in one place, with workflow checks and a report
  • Added from your blueprint when you start building. Buying a blueprint never starts it
Start with a blueprint

Pay in one tap with Apple Pay, Google Pay or Link. No account needed: your blueprint is emailed to you the moment you pay.

14-day money-back guarantee if your blueprint doesn't keep your AI on track (for the one-time blueprint). Refund policy

About Build guidance

  • $19 a month, charged monthly until you cancel. Cancel any time from your guided build; it runs to the end of the period you paid.
  • Only reviews and plans we deliver count. If something fails on our side, it uses nothing.
  • Cancelling never touches your blueprints: they stay yours.
  • Not included: new blueprints, blueprint rewrites, or unlimited AI use.

Questions founders ask first

Something missing? support@vibetospec.com reaches a person.

Bring the messy version. We'll draw it up together.

Paste your idea as it is today. In under a minute you'll see what we understood and the decisions worth making before any code is written.

Scan my idea

Free · no account needed