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BYOB New inbox in every project
AI Preflight Planning
The costliest bugs are the ones baked into a project before it exists. Preflight planning is BYOB's step between your idea and generated code, where the request is sharpened, features are named, and a direction is agreed before the build starts.
Runs on the stack you trust
Prompt to product
From one-line brief to finished app.
Compare the one-line brief with what BYOB ships. Real layout, data, and deploy status, editable from the same workspace.
TD
Team Tasks
Shared task tracking
Today4
Done11
Streak6d
Open live app ↗
Drag the handle. Or focus it and use the arrow keys.
Get inspired
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Real sites that do it well. Build something like this with BYOB.
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Fresh from the community
See what builders ship, or start from an example.
Live workspace
Code, chat, and preview in one place.
The workspace is built for repeated product work, not disposable demos. Every generated file stays inspectable, every change is visible, and every follow-up can target the exact part of the app you care about.
01 · EDITOR
Generated code, ready to edit.
Every file BYOB writes stays visible and editable. Follow-ups target the exact lines you care about instead of regenerating from scratch.
- Added lines highlighted the moment they land
Code
Act mode TodoPage.svelte
schema.ts
1
<script lang='ts'>2
type Task = { id: string; title: string; done: boolean
}3
let tasks = $state<Task[]>([])4
5
function toggleTask(id: string) {6
task.done = !task.done // just added by BYOB7
}8
</script> main · 0 problems Preview ready
02 · AI COMMAND
Plan, build, and refine in one chat.
Describe the outcome once. BYOB turns it into a build plan, implements it step by step, and keeps every change visible while you iterate.
- Build plan with live progress you can inspect
B BYOB AI
Chat Act
Your prompt
“Build a todo app for beginners”
Build plan
80%- Task list UI + empty state
- Add + toggle actions
- Progress summary…
Add due dates and filter by done…
03 · LIVE PREVIEW
See every change the second it lands.
The preview updates as BYOB works, with deploy status attached, so the path from edit to production stays inspectable.
- Real app state, not a static mockup
Live preview
/TD
Team Tasks
Shared task tracking
Progress 2 of 3 done
- Wireframe landing page
- Task list component
- Responsive polish + QA
Ask BYOB to refine
Deployed · SvelteKit · SSL on
Prompt to app
From first prompt to a workspace you can ship.
Start conversationally, approve the shape, let Tool Mode implement, then refine and deploy from the same workspace.
- 01 Describe the product Start with the outcome, audience, and any constraints. BYOB turns the idea into a practical build plan.
- 02 Shape the UX Review the proposed flows, screens, data needs, and visual direction before code starts moving.
- 03 Generate the app Tool Mode writes SvelteKit code, connects integrations, and keeps each change visible in preview.
- 04 Test and refine Ask for edits, roll back when needed, run checks, and keep the project editable instead of disposable.
- 05 Deploy Ship the finished app, connect domains, and keep iterating from the same workspace.
Agent and backend
Code with your agent, ship with a real backend.
Connect Codex, Claude Code, or Antigravity to your project, then store data and ship to production without leaving the workspace.
- Approve project access from BYOB
- Installs the byob command
- Preview, deploy, git diff, DNS, credits, and code tools
npmnpx -y byob-cli codex installApprove only the projects your agent can touch, then read context, edit files, inspect diffs, test previews, and roll back from your terminal.
- 1
- prompt to start
- 3
- live panes
- 24/7
- edge preview
Loved by builders
Rated 4.9/5 by developers and founders using BYOB to move from idea to shipped product.
Built for shipping
The parts that usually slow you down are already here.
BYOB handles product planning, implementation, preview, testing, database work, and deployment from one focused interface, with coding-agent access and production analytics when you want to keep working from your own terminal.
This part is hands-on. The cards drift until you touch them. Drag to rearrange, or press and hold one to feel it push back.
Agent integrations
Give Codex, Claude Code, or Antigravity scoped access through BYOB CLI or Agent MCP. Your agent reads context, edits code, tests previews, and deploys from your terminal.
Git history and diffs
Every change lands as a commit. Inspect history, compare diffs, and see exactly what changed since the last deploy.
Inbox in every project
Every project ships with an inbox. Collect messages, leads, and feedback from your app without wiring a third party.
Email sending built in
Send magic links, OTP codes, and transactional mail from your own sender address. Resend-backed, no SMTP setup.
Google and magic-link login
Offer Continue with Google plus passwordless email codes. Sessions and callbacks are handled.
Custom domains and SSL
Point your domain at BYOB with guided DNS checks. Certificates are automatic.
Visual editing
Click any element in the live preview and describe the change. Copy, spacing, color, behavior.
AI testing agent
Run full-site or feature checks and get implementation-level feedback you can apply in one step.
Version rollback
Step between saved states or redeploy a known commit when an experiment goes sideways.
One-click deploy
Builds publish to production hosting in one step. Deploys can auto-save the project state first.
Deployment analytics
Worker traffic, errors, CPU timing, subrequests, and custom-domain status from the workspace.
Supabase aware
Connect Supabase and BYOB reads schemas, drafts migrations, and generates types that match your app.
Team collaboration
Invite people in and keep sessions coordinated so work never overwrites work.
- Vision inputs
- Voice coding
- Project templates
- SEO-ready output
- Context tracking
- Model lock
Simple pricing
Start with credits, upgrade when usage is steady.
Pay as you go when you are exploring. Move to Pro or Max when BYOB becomes part of your regular build workflow.
Pay as you go
$0
$1 = 100 credits
Pro
$25
2,000+ credits/mo
Max
$79
8,000+ credits/mo
Live estimator
What will your app cost?
Try the cost calculator. Drag the pages slider, toggle the options, and watch the agency quote vs BYOB update instantly.
Open full cost calculator →Number of pages: 5
Traditional agency estimate
$5,750 upfront
Yearly maintenance
~$1,150 / year
BYOB estimate
~$45 in credits
BYOB builds the same site from one prompt and hosts it on the edge. Planning estimates, not quotes.
See BYOB plansView full pricing
Need white-label and SSO? Talk to us →
AI preflight planning is BYOB's planning stage before generation. It refines your prompt, identifies the features the app needs, proposes an UX direction and returns a plan you approve. Because scope is settled before code is written, you avoid long rebuilds caused by a misunderstood request.
Why plan before generating
AI generators are fast, which makes a wrong assumption expensive: a vague prompt becomes a large app built around the wrong idea, and every later fix is a rebuild. Preflight planning moves the clarification to the fastest moment. Instead of discovering halfway through that you meant a booking flow and not a contact form, you settle the goal in plain language first. The plan then acts as a shared reference. When you review generated work later, you check it against something explicit rather than against your memory of the original sentence.
Sharpening the prompt
The first pass turns a loose description into a specific brief. BYOB asks what the product is for, who uses it, and what a successful session looks like, then reflects those answers back. Missing details such as whether accounts are required or whether data must persist get surfaced here rather than guessed silently. You can accept the interpretation or correct it in a sentence. This back-and-forth is short, and it replaces the much longer loop of generating, noticing a mismatch and reworking the result.
Naming the features
Planning produces a concrete list of capabilities: pages, forms, login, data models, integrations and the states each screen needs. Because BYOB knows what it can generate, it can separate features that fit the initial build from those that should wait. You see the trade-offs before committing, which helps a solo founder or a small team decide what belongs in a first version. The list also becomes a checklist during review, so nothing agreed in the plan quietly disappears from the finished app.
Agreeing on an UX direction
Beyond features, the plan sketches how the app should feel and flow: navigation shape, primary action, density and the order tasks happen in. Presenting a direction early prevents the common outcome where a perfectly functional app is laid out in a way nobody wanted. If you already have a strong opinion, you can state it and skip the exploration; if you do not, the proposal gives you something specific to react to. This is also the point where an optional design exploration, such as Design Lab, can be chosen deliberately rather than by accident.
Approving the plan
You are the gate before code. The plan is presented for approval, and generation waits until you confirm or edit it. That pause is deliberate: it keeps the model from sprinting past a decision that only you can make. Approving a plan does not freeze the project forever. You can revisit scope later, but changes become conscious choices with a visible before and after rather than silent drift. The same record helps when a project is handed to someone else, because the reasoning behind the structure is written down.
What planning cannot promise
Preflight planning reduces misunderstanding; it does not remove uncertainty. Some needs only become clear once you use a working interface, and a plan built from descriptions will still miss details that real users reveal. Treat the plan as a good starting scope, not a contract that forbids change. It also does not replace testing or a final review. The value is in aligning expectations early, which is why the step is short and easy to revisit as the app takes shape.
FAQ
Frequently Asked Questions
Is preflight planning required to build?
Guided projects use it to align scope first. Quick builds can skip straight to generation when the request is already precise.
How long does planning take?
It is a short exchange: a couple of clarifying turns and a plan to approve, not a separate project phase.
Can I change the plan after approving it?
Yes. Scope is not frozen; you can revise it, and the change is visible rather than hidden in a rebuild.
Does the plan guarantee the app matches my idea?
It greatly reduces misalignment, but a working interface often reveals details no description can, so expect to iterate.
Who is preflight planning for?
Founders and teams who want to agree on features and direction before spending generation time on the wrong build.
Build the first version today.
Start with one clear prompt. BYOB will help turn it into a product you can inspect, edit, test, and ship.