AgentLovableClaude CodeCodexReplitCode Assist

Make your AI buildsecurely.

Builder Agent knows everything you need to ask for and how the AI needs to build it. At every step, your AI checks in with it, asks you what's missing, and only moves on when the gate confirms everything has been verified.

Get started

48 hours free, no card

What happens today

Everyone starts.
Almost no one finishes.

01
+

You ask and hope

“Build me a booking app.” Five lines for an entire system. The AI makes up the rest.

02

It guesses the other 95%

The AI never says “I didn't get that.” It delivers something pretty, confident and wrong, and you approve it because the screen loads.

03

The bill starts climbing

Every tweak takes three tries. More credits spent fixing than building.

04

And nothing ever ships

Lots of credits, lots of time, an app going in circles. You've been there.

Your prompt says what you want. It doesn't say what's missing, or how to build it.

Everyone says that to get the AI to build it right, you have to know how to ask. Builder Agent knows both, and guides your AI through them.

How it works

It doesn't write your app.
It guides your AI.

You

Ask and answer

Your way, in plain English.

  • One question at a time
  • Pick from options when you're not sure
  • Approve scope and plan before anything is built
Your AI

Executes

Lovable, Claude Code, Codex, Replit…

  • Checks in with Builder Agent at every stage
  • Reviews your request against the guidance
  • Asks what the guidance requires
  • Implements, tests and documents
Builder Agent · MCP

Leads

The senior team inside your AI.

  • Says what to ask and which gaps to close
  • Says how to assess the impact
  • Says how to plan and build each phase
  • Runs the gate: nothing moves on unverified

The method

Four stages.
A gate between each one.
And a finished app at the end.

At each stage, your AI asks Builder Agent how to do it, does the work, and asks you about anything still open.

Stage 1

Understand everything.

Discovery that closes every gap

Builder Agent lays out what information an app like yours needs. Your AI checks that against your request and turns every gap into a question, with options when you're not sure.

The gate opens whenNo gap is left open and you've approved the scope.

Stage 2

Measure the impact.

Impact analysis across every layer

Builder Agent shows how to assess each layer: data, screens, rules, integrations, security, performance, privacy and what already exists. New questions come back to you.

The gate opens whenEvery layer has been assessed and every question answered.

Stage 3

Plan in phases.

Spec-driven phased plan

Builder Agent shows how to break the app into phases, the order of dependencies and the acceptance criteria for each one. It's all written down in the project.

The gate opens whenEvery phase has acceptance criteria and you've approved the plan.

Stage 4

Build phase by phase.

Build orders for every phase

For each phase, Builder Agent gives the order: implement, test and document. Your AI does the work and shows the proof. Repeat until the last phase.

The gate opens whenTests passed, the documentation exists and the acceptance criteria are met.

And at the end

Your app, built the right way.

What the method delivers

When the last phase clears the gate, you have an app a senior team would sign off on, built with the AI you already use.

  • Far fewer tokens and credits, because every phase lands on the first try
  • No more bug loops: what already worked keeps working
  • Professional-grade architecture, design and security
  • Performance and privacy built in from day one
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Inside stage 4

Every phase takes
the same path.

Three steps and a gate, always in the same order. Even after the app is live.

01

Implement

Only what's in the phase spec.

02

Test

Against the acceptance criteria, end to end.

03

Document

In the project, so the AI can reread it tomorrow.

04

Gate

Checks everything. No proof, no pass.

The gate doesn't accept “I think it worked.”

It's a Builder Agent tool your AI has to call before moving on. If something wasn't verified, it goes back and fixes it.

  • Doesn't start building before the plan is approved
  • Doesn't touch anything out of scope, not even “as a bonus”
  • Doesn't skip to the next phase while the current one is open
  • Doesn't close a phase without testing and documenting
Gate · phase 2 of 5Blocked
  • Criterion: customer books a time slot
  • End-to-end test passed
  • Each customer only sees their own data
  • Phase documentation not found
  • Nothing out of scope was changed

Your AI documents the phase and calls the gate again. Only then is phase 3 unlocked.

Autonomy

Does almost everything on its own

You ask and answer. It leads from start to finish.

Time

No going back to square one

Every phase truly closed before the next one starts.

Cost

Saves tokens and credits

Every request lands on the first try. That's where the bill drops.

You ask. Builder Agent leads. Your AI builds it right.Get started

Where it works

The method stays the same.
The tool is your call.

The guidance speaks each AI's language: files, commands and proof in the format it understands.

Lovable

Chat, preview and deploy in the browser.

Claude Code

Terminal, plan mode and CLAUDE.md.

Codex

AGENTS.md and proof in the terminal.

Replit

Shell, Secrets and Replit deploys.

Code Assist

VS Code, Antigravity and the like.

No need to start from scratch

Where are you
starting from?

Discovery adapts to where you are. If the app already exists, it starts by reading what's there.

I just have the idea.

From scratch

Discovery, impact, plan and build, all the way to a live app.

I'm not sure my app is secure.

Security review

Reviews every layer and lists what's fragile, from most to least serious.

Start here
I built it and now it's a maze.

From an existing app

Reads it, documents what was never written down, and only then plans.

I fixed one thing and broke another.

From a bug

Measures the impact first, defines what must not change, and fixes within that.

Pricing

One price.
Everything included.

No usage caps, no per-call billing, no plan hidden behind another plan.

  • The full method: discovery, impact, phased plan and implementation
  • A gate verifying every stage and every phase
  • All four starting points, including a security review
  • Everything documented in the project, so the AI can reread it in any tool
  • Cancel anytime, and what you built stays yours

Want another tool too? Each one is + $9.00/mo.

For you

$29.00 /mo

Billed monthly.

Your main tool

Included in the price above. Other tools are available as add-ons.

Get started

48 hours free, no card. Cancel in one click.

For your company

Several people on one contract, invoicing and a guided rollout.

Talk to us

Stop trying to write the perfect prompt. Start building it right.

Your next app can be the first one that actually ships, inside the tool you already use.

Get started

48 hours free, no card