THE FLIGHT SIMULATOR FOR SOFTWARE ENGINEERS · BOARDING SOON

AI is the autopilot.
You are still the pilot.

Flightstack makes engineers better in the AI era. Fly real tickets with AI, see exactly what you got wrong, and come back sharper.

Request early access See a flight

Fly real work with AISee what you missedCome back sharper

An animation in three steps. First the autopilot is on and the AI writes the code. Then a master caution: orders are going out at zero dollars. Then you have control, and the flight recorder shows what you missed.

001The promo code

BriefExploreBuildCheckLiveLand

Sale in 16 min

BRW-112 · due 5:00 PMAdd promo code BREW20 to checkout$20 off for the Friday sale. One use per customer.

web

CheckoutPage.tsx

PromoInput.tsxM

api

checkout.tsM

cart.ts

promo.tsNEW

welcome10.ts

schema.sql

analytics

events.ts

tests

checkout.test.ts

System mappromo.tscheckout.ts

Copilot changed 3 files+21Undo · Keep

1 import { Cart } from "./cart";

3+const PROMOS = {

4+ BREW20: { amount: 20 },

5+};

2 callerscheckout.ts:41PromoInput.tsx:18

7+export function applyPromo(cart: Cart, code: string) {

8+ const promo = PROMOS[code];

9+ if (!promo) return cart;

10+

11+ cart.total = cart.total - promo.amount;

12+ cart.promos.push(code);

13+ return cart;

14+}

12 tests passed · 1.8s Run the appOpen pull request

Copilot

add promo code BREW20, $20 off at checkout

Done. I added applyPromo, called it from checkout, and put a promo box on the page.

promo.ts +12checkout.ts +3PromoInput.tsx +6

Explain thisWhat could go wrong?Check it against the ticket

Ask Copilot anything

Making human engineers better in the AI era

AI can build it in a day. Can you think it through?

Think before you promptEvery flight asks for your call before the AI's code ships.

See what you got wrongThe flight log replays your decisions and what each one cost.

Get sharper every flightFly again in new conditions and watch your judgment improve.

One flight, start to finish

From ticket to take-off.

01 · BRIEF

You get a real ticket.

A deadline, a crew, and a product manager who wants it today.

BRW-112Due 5:00 PM

Add promo code BREW20 to checkout

$20 off for the Friday sale. One use per customer.

MKARYour lead, your PM, your copilot

02 · EXPLORE

See the whole system.

Page, API, database, analytics, logs. The bug can live in any of them.

Checkout pagePromoInput.tsx

Checkout APIcheckout.ts

Databasepromo_redemptions

WATCHING EVERY ORDER AnalyticsLogs

03 · BUILD

Use all the AI you want.

It writes the code. Whether it's right is your call.

add promo code BREW20, $20 off at checkout

Done. I added applyPromo and wired it into checkout.

promo.ts +12checkout.ts +3PromoInput.tsx +6

12 tests passed

04 · CHECK

Think before you ship.

One prediction before take-off. Go on, pick one.

PRE-FLIGHT CHECK

A customer applies BREW20 three times. What happens?

05 · Live

Then production happens.

Real traffic, real money, and a team asking what is going on.

001The promo code

BriefExploreBuildCheckLiveLand

Sale is live

Orders per minute4129x a normal Friday

Average order$0.00was $34.10

Given away by mistake$12,480+$310 every minute

Last 20 minutesOrdersRevenueRevenue

LIVE LOGS17:07:41 POST /checkout 200 total=0.00 promos=BREW20,BREW20,BREW20 17:07:42 POST /checkout 200 total=-6.00 promos=BREW20,BREW20,BREW20,BREW20

# checkout3 new

Arjun5:04BREW20 is all over X. People say it stacks?

Priya, finance5:06Why are 300 orders at $0?

Arjun5:07Are we losing money right now?

Arjun5:04BREW20 is all over X. Is it holding?

You

You5:05One use per customer. I tried to break it before we shipped.

Arjun5:07Best sale we have had. Nice work.

Your call03:12 since first $0 order

Roll back the deployTurn off BREW20Fix it with CopilotKeep digging

06 · Land

Every flight ends in a flight log.

What happened, where it could have been stopped, and how you flew with the AI.

THE TICKET SAID$20 off. One use per customer.

YOU ASKED THE AIadd promo code BREW20, $20 off at checkout

THE AI BUILTExactly that. Nothing more.

ONE ORDER, REPLAYEDFour places could have stopped it.

CHECKOUT PAGEApply tapped 3 timesButton never locks

CHECKOUT API$20 taken off 3 timesNo used-before check

DATABASEOrder saved at $0Redemption never recorded

ANALYTICS3 promo uses on 1 orderNo alert on it

$12,790given away

4 minto stop the loss

11 secspent reading the AI's code

0 of 1predictions right

Departures

Every flight is a real day at work.

FLIGHTDESTINATIONSYSTEMLEVELSTATUS

001The promo codeCheckoutCadetBOARDING SOON

002The slow pageDatabaseCadetSCHEDULED

003The 2 a.m. pageOn callCadetSCHEDULED

004The double chargePaymentsFirst officerSCHEDULED

005The big migrationDataCaptainSCHEDULED

006The runaway AI billAI in productionCaptainSCHEDULED

Ranks

Fly at your level.

0–2 years

Cadet

First tickets on small systems. Hints are on.

2–6 years

First officer

Scale, payments and on-call. Fewer hints.

6+ years

Captain

Migrations, incidents, AI in production. No hints.

FIRST FLIGHT$0

PILOT$149 a year

FOUNDING CREW$99 first year

See all fares

Now boarding

Get on the first flight.

Flight 001 boards soon. Tell us you are coming.

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AI is the autopilot.You are still the pilot.