Stop iterating. Start shipping.

Your AI tool is only as good as your brief.

BriefKit generates engineer-grade specs for your SaaS — design system, database schema, auth flows, billing logic, test cases — so your AI build tool gets it right the first time.

Without a brief

You:Build me a SaaS dashboard

AI:Here's your dashboard ✓

You:The fonts are wrong. Fix them.

AI:Updated the fonts ✓

You:Now the colors don't match the landing page

AI:Fixed the colors ✓

You:The sidebar is gone. Why did you remove it?

AI:Restored the sidebar ✓

You:The auth is broken now. Fix it.

AI:Fixed the auth ✓

You:It says fixed but nothing actually changed…

200+ iterations · $50–150 in credits · 4–8 weeks

With BriefKit

# Dashboard Brief
## Design: DM Sans · #2563EB · 8px radius
## Schema: profiles, orders, metrics
## RLS: owner sees own data only
## Auth: 6 states defined
## Test: admin@test.com / TestPass123!
## Verify: show me what you SEE, not what should happen

You:Build the dashboard per this brief

AI:Here's your dashboard ✓

You:✓ Looks correct. Ship it.

~19 prompts · $9 brief + $20 build tool · 1–2 weeks

Start your brief — free →See a sample brief pack

Works with: Lovable · Claude Design · Claude Code · v0 · Cursor · Bolt · Replit

Works with any AI build tool — prompt builders · design AIs · agentic editors · UI-from-text · code editors · full-stack tools · prototyping platforms

200+

average iterations to ship a SaaS on prompt builders

Most are wasted fixing design drift, permission errors, and vague prompts

~19

prompts with a BriefKit brief pack

1 Global Brief + 8 Screen Briefs + ~10 small iterations

per brief pack version

vs $50–150 in wasted build tool credits without one

How it works

Pick a SaaS template

Choose from 6 SaaS archetypes — B2B, dev tool, productivity, API, marketplace, micro-SaaS. Every design decision pre-filled. Override what you care about.

Customize your brief pack

Design tokens, database schema, auth flows, pricing tiers, RBAC, test users, deployment config — all configured through a simple form. No code. The brief preview updates live.

Export and build

Paste the Global Brief once into your AI tool. Then one Screen Brief per screen. BriefKit formats it for any major platform. Your design never drifts because the spec is locked.

What's in a brief pack

17 generated files. Every one prevents a specific failure mode.

What BriefKit generates

What this means

What this prevents

Design system

The exact colors, fonts, and spacing every screen should use — like a brand guide for your app

Design drift between screens

Constraint rules

A list of rules telling the AI what NOT to do — like guardrails on a highway

Scope creep, unrequested changes

Database schema

A blueprint of how your data is organized — think of it as the filing cabinet structure for your app

Restructuring everything at month 2

Same tools. Different results.

The difference between vague intent and a complete spec.

Without BriefKit

✗“Make me a SaaS dashboard”
✗200+ iterations, $50–150 in credits
✗Design changes every generation
✗Permission policies created ad-hoc, conflicting
✗Auth works for happy path, breaks on edge cases
✗No test users, no seed data, no way to verify
✗“Says it fixed it” — nothing changed
✗Payment webhooks silently fail
✗4–8 weeks to launch

With BriefKit

✓Engineer-grade spec: schema, RLS, API, auth states
✓~19 prompts, $9 + one month of build tool
✓Design locked via Global Brief
✓Master permission policy file — one source of truth
✓Auth state machine covers 6 states + transitions
✓6 test users, seed data, verification protocol
✓“Show me what you see, not what should happen”
✓Webhook idempotency, retry logic, failure logging
✓1–2 weeks to launch

Pay per version. Not per month.

Create and edit for free. Pay $9 when you finalize and export.

Brief pack

$9per finalized version

✓6 SaaS templates with complete defaults
✓Global Brief (design + schema + auth + billing + RLS)
✓8 Screen Briefs
✓5 Reference Docs
✓Formatted for any major AI build tool
✓Unlimited edits before finalizing
✓Version history with diff comparison
✓Migration briefs for v2, v3, v4…

No credit card until you export.

v1 — Launch

Your first complete brief pack. 14 files. Paste into your build tool and ship.

v2 — Add features

Adding team management? BriefKit generates the migration diff — new tables, updated RLS, new screen brief. 3 prompts to upgrade.

v3 — Scale

New pricing tier? Analytics dashboard? Partner API? Each version captures exactly what changed.

Most SaaS products need 3–5 versions in year one. That's $27–45/year for complete engineering specs.

Built for founders. Ready for engineers.

Your brief pack is your technical handover.

You don't need to understand database schemas or RLS policies to use BriefKit. But when you're ready to hire an engineer or hand off to a development agency, your brief pack IS the handover document.

Every file is written in the same format engineers use to spec real products. No translation needed. No "let me explain what I meant" meetings. Hand them the brief pack and they'll know exactly what to build — whether they use AI tools or write code from scratch.

Save your exported brief pack. It's the single source of truth for your product.

Hand to AI tool

Paste into Lovable, Claude, or Cursor. Brief is the prompt.

Hand to engineer

Send the brief pack as your technical spec. They skip 2 weeks of discovery.

Hand to agency

Share with a dev shop. Brief pack replaces the scoping phase.

💡 Tip: Export your brief pack and save it somewhere safe — Google Drive, Notion, or your project folder. This is your product's blueprint.

Works with every AI build tool

Lovable

Full-stack AI builder

Structured prompts that prevent permission conflicts and design drift

Claude Design

AI design tool

DESIGN.md with exact tokens so output matches your brand

Claude Code

Agentic code editor

Complete schema + API contracts for precise multi-file edits

UI-from-text generator

Tailwind config + component specs for pixel-perfect UI

Cursor

AI code editor

Multi-file specs: DESIGN.md + CONSTRAINTS.md + schema.sql

Bolt

Full-stack one-prompt tool

Spec that goes beyond 'build me a dashboard'

Replit

Prototype platform

Production-grade specs: auth, billing, RLS — not just prototypes

See what a brief pack looks like

# Northwind — Global Brief
## Generated by BriefKit | v1

## 1. DESIGN SYSTEM
--color-primary: #2563EB
--color-bg:      #FFFFFF
--color-surface: #F8FAFC
--color-text:    #0F172A
Display: DM Sans (700)  |  Body: IBM Plex Sans (400)
Radius: 8px  |  Density: Balanced  |  Animation: Subtle

This is 1 of 14 files in a brief pack.

Questions

Stop burning credits.
Start shipping product.

Start your brief — free →

No account needed to start. No credit card until you export.