Harden the public a0.dev app: preview, Deployment, and backend controls before campaigns
An early TestFlight invite or shared a0 preview QR is enough for payment probes and Deployment ACL leaks — before you buy a single click. Seal Convex/Supabase and payment secrets, put real Auth in front of mutating flows, lock who can hit Generate & Submit, and decide web preview versus native IPA/APK proof. Keep the MVP surface; close the doors defaults leave open.
Tightening means the public binary or preview stays up while you close risky prompt-built journeys. Secrets leave the panel. Sign-in holds for people who never opened a0. Deployment no longer lets every collaborator Generate & Submit. Watching flags abuse. You can kill a bad release without regenerating from a prompt. Exit pages wait until stranger tests fail that bar.
When the a0 wrap is still honest
Stay on a0 when you can still name the risky journeys
If secrets still sit only in the a0 panel, or strangers can open Deployment, this is not a wrap. Pick migrate or to-production instead.
Prompt-built journeys that take money or personal data
Those need real Auth on the store build or hostname users hit — not a button you hide in chat.
Web preview treated as proof for payments or biometrics
Require native IPA/APK or store-track proof. Web preview documents those as unsupported or limited.
Anyone with the a0 project can Generate & Submit
Restrict Deployment ACLs. Keep Apple Team ID and Play consoles under org admins.
Panel secrets end the stay path
Rotate anything that appeared in collaborator history. If secrets cannot leave the panel, you are past hardening.
The public a0 wrap week
Close risky journeys before the next Generate & Submit
Keep the current project. Prove secrets out, Auth, watching, and a Deployment kill switch before ads.
01
Inventory journeys that take money or personal data
Start there. Marketing screens wait.
02
Drain secrets from the a0 panel and web-preview dumps
Rotate anything that appeared in history.
03
Add watching plus a Deployment / spend kill switch
Know when the primary journey fails. Stop bots burning quota.
04
Decide stay vs leave from what broke
If stranger tests still fail after the wrap, migrate is the honest next page.
How to
How to harden a public a0.dev app before campaigns
Lock risk on the current setup. Stay until evidence says leave.
Step 01
List journeys that take money or personal data
Those are the lock targets — not polished prompt screens.
Step 02
Require real signed-in sessions on those paths
Prefer locked TestFlight / Play internal tracks. Kill demo bypasses.
Step 03
Drain and rotate secrets that lived in the a0 panel
Separate preview backends from production.
Step 04
Install a Deployment off switch for a bad release
Restrict Generate & Submit; plan OTA within shipped runtime — before ads.
Step 05
Re-test with stranger-like accounts, then decide
Keep a0 or leave based on what still broke.
Read next
Proof, the essay, and sibling intents
These pages are already on the site. Use them to pressure-test the bet before a call.
“What impressed us most about CodeCross was their ability to deeply understand our vision and translate it into a complete digital solution. Unlike many agencies that just focus on technical delivery, CodeCross approached our project like true partners.”
How can open Deployment ACLs plus preview≠native leave an a0 MVP abuseable before any ads?
Anonymous callers hammer paid APIs or AI inference routes the agent wired; bots probe shared web-preview links; TestFlight external groups expand without review; and anyone-with-the-project shares expose Deployment or backend settings. Assume every shared preview QR and Deployment status page is hostile until Auth, rate limits, and ACLs say otherwise.
Which Convex/Supabase project splits and Generate & Submit locks must hold on an a0 MVP?
Secrets only in sealed backend config — never in client-visible prompt output, chat, or web-preview console dumps. Rotate anything that appeared in collaborator history. Restrict who can open Deployment and Generate & Submit; keep Apple Team ID and Play consoles under org admins. Separate Convex/Supabase preview projects from production so a laptop leak is not a prod leak.
How should a0 web preview and native testing differ for a public app?
Require native IPA/APK or store-track proof for payments, push, camera, and biometrics — web preview documents those as unsupported or limited. Prefer locked TestFlight / Play internal tracks for customers; keep the editable a0 project private. Deep links and Auth redirects must match production schemes — not a personal web-preview URL. Use a0 app / Expo Go for device QA, not as the production distribution channel.
When do open Deployment ACLs or preview-only payment proof force leaving a0 instead of another wrap?
When secrets cannot leave the panel, when you cannot lock who Generate & Submit, or when web preview is still your only proof for payments. Then migrate or to-production is the honest page — not another wrap week.
Keep a0.dev for now. Lock preview, Deployment, and backend risk first.
Bring which journeys take money, where panel secrets still live, and how you would stop a bad Generate & Submit without regenerating from a prompt. We lock before we talk migrate.