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Launch day

Your app works on your laptop and in the demo. Then real users arrive at once, from real inboxes, on your real domain, and a different set of limits appears: test-only email senders and spam filters, OAuth callback rules, function timeouts, caches and database connection caps. This trail walks through launch day before it happens.

Scenarios
11
Total time
44 minutes
Free to try
The first one

11 scenarios on this trail

  1. Next up · Free · 4 minLaunch day, no emailsYour own test signups always got their email. You launch on Product Hunt, forty people sign up, and not one receives the confirmation email.
  2. Stop 2 · Pro · 4 minSign in with Google: Error 400'Sign in with Google' works perfectly on your laptop. On your real domain, users see 'Error 400: redirect_uri_mismatch'.
  3. Stop 3 · Pro · 4 minThe 504 at second 60Generating a long AI report works on your laptop. In production, where the route's time limit is set to 60 seconds, big reports fail with '504 Gateway Timeout'.
  4. Stop 4 · Pro · 4 minThe old priceYou raised your price an hour ago. Your admin page shows the new price. Customers are still checking out at the old one.
  5. Stop 5 · Pro · 4 minEvery page spins foreverYour post goes viral. Within minutes every page spins, then fails. Your database dashboard says CPU is nearly idle.
  6. Stop 6 · Pro · 4 minThe reminder that never cameYour app promises 'We'll remind you in 24 hours'. Nobody has ever received the reminder.
  7. Stop 7 · Pro · 4 minFast with 50 rows, slow with 20 millionYour orders page was instant in testing. Two years and 20 million orders later, it takes eight seconds to load.
  8. Stop 8 · Pro · 4 minInvisible to GoogleYou published thirty blog posts over three months. Google shows only your homepage.
  9. Stop 9 · Pro · 4 minThe upload that was too bigUsers can upload photos to their listings. Phone photos fail with '413 Payload Too Large'. Screenshots work fine.
  10. Stop 10 · Pro · 4 minSame answer, 50,000 timesYour product pages show prices in the visitor's currency. Pages feel slow, and the currency API bill grows with every visitor.
  11. Stop 11 · Pro · 4 minTwelve requests on the home pageYour home page is mostly text and a sign-up button. The Network tab shows twelve API calls before it finishes loading, some of them failing.

Other trails

  • Who may see what

    Sign-in, permissions, and the leaks AI-built apps ship most often.

  • The life of a click

    Follow one button press from the browser to the database and back.

  • Money and secrets

    Keys, payments, webhooks, and reading what your AI changed.

  • Data you can lose

    Agents that reset production, backups that are a day old, rollbacks that break.

  • Bills that explode

    Open AI endpoints, bot traffic, fake signups and functions that loop forever.

  • Working with your AI agent

    Dangerous commands, fix loops, deleted tests, prompt injection and invented packages.

Sign in
  1. Next up · Free · 4 minLaunch day, no emailsYour own test signups always got their email. You launch on Product Hunt, forty people sign up, and not one receives the confirmation email.
  2. Stop 2 · Pro · 4 minSign in with Google: Error 400'Sign in with Google' works perfectly on your laptop. On your real domain, users see 'Error 400: redirect_uri_mismatch'.
  3. Stop 3 · Pro · 4 minThe 504 at second 60Generating a long AI report works on your laptop. In production, where the route's time limit is set to 60 seconds, big reports fail with '504 Gateway Timeout'.
  4. Stop 4 · Pro · 4 minThe old priceYou raised your price an hour ago. Your admin page shows the new price. Customers are still checking out at the old one.
  5. Stop 5 · Pro · 4 minEvery page spins foreverYour post goes viral. Within minutes every page spins, then fails. Your database dashboard says CPU is nearly idle.
  6. Stop 6 · Pro · 4 minThe reminder that never cameYour app promises 'We'll remind you in 24 hours'. Nobody has ever received the reminder.
  7. Stop 7 · Pro · 4 minFast with 50 rows, slow with 20 millionYour orders page was instant in testing. Two years and 20 million orders later, it takes eight seconds to load.
  8. Stop 8 · Pro · 4 minInvisible to GoogleYou published thirty blog posts over three months. Google shows only your homepage.
  9. Stop 9 · Pro · 4 minThe upload that was too bigUsers can upload photos to their listings. Phone photos fail with '413 Payload Too Large'. Screenshots work fine.
  10. Stop 10 · Pro · 4 minSame answer, 50,000 timesYour product pages show prices in the visitor's currency. Pages feel slow, and the currency API bill grows with every visitor.
  11. Stop 11 · Pro · 4 minTwelve requests on the home pageYour home page is mostly text and a sign-up button. The Network tab shows twelve API calls before it finishes loading, some of them failing.