a0.dev · Public track is hostile
A public TestFlight, Play internal track, or listed a0.dev-built Expo app invites scrapers, leaked agent keys, and unreviewed screen diffs as soon as you share the listing. Hardening on a0 means sealing secrets out of agent messages, locking who can one-click publish, verifying App Store / Play privacy and data-safety strings, and rate-limiting Convex or Supabase routes—before paid traffic treats your MVP as free AI and database infrastructure. You keep the MVP surface; you close the abuse doors mobile defaults leave open.
30 min · senior team · leave with a clear next step
Company-level evidence
Review methodologyCitation-ready answer
CodeCross LLC treats a0-mvp-hardening as the pre-campaign wrap for a public a0.dev Expo listing: agent transcripts must not hold live keys, TestFlight or Play invites must not expose debug Auth, and IAP must reject missing store credentials. Review strings have to match what the binary collects. Ship traffic only after Convex or Supabase writes require a session and inference routes have a spend cap.
How a shared a0.dev track gets abused
TestFlight links, Play internal tracks, and a0 web-preview QRs are easy to discover once tweeted. Assume every track is hostile until Auth, rate limits, and Deployment ACLs say otherwise.
Bots probe the same Convex or Supabase project the agent wired. Quota burns on built-in AI routes before you buy a single ad.
Rotate anything that showed up in chat. Separate personal laptop projects from the production backend bag.
Nutrition labels and data-safety disclosures must match Auth, analytics, payments, and a0 built-in APIs—or review stalls after you already have installs.
Subscriptions configured via a0 must reject when store/env credentials are missing. Launch day is too late to learn debug Auth is still on.
The public-a0 harden we actually run
Keep the MVP surface. Close the doors a0 defaults leave open. Prefer locked TestFlight / Play internal tracks for customers.
01
Never in client-visible prompt output, chat, or web-preview dumps. Restrict who can open Deployment and Generate & Submit.
02
Separate preview Convex/Supabase projects from production. Alert on anomalous usage. Public binaries plus open backends are a billable surface.
03
Web preview documents those as limited. Use a0 app / Expo Go for QA, not as the production distribution channel.
04
Cap OTA to the shipped runtime version. Hardening fails if launch day is the first time you learn web preview hid a native payment break.
How to
Agent secrets, store privacy, and backend abuse controls on the binaries users install. Success is strangers unable to burn quota or read data from a shared a0 link.
Step 01
Cap spend. Require Auth before costly Convex/Supabase or inference routes. Lock who can Generate & Submit.
Step 02
Secrets only in server env. Rotate anything that appeared in collaborator history. Separate developer personal projects from production.
Step 03
Privacy nutrition labels, data-safety disclosures, and permission justifications must be accurate—not placeholder copy the agent invented.
Step 04
Keep the editable a0 project private. Deep links and Auth redirects must match production schemes—not a personal web-preview URL.
Step 05
State the production model. Confirm IAP fails closed without valid store credentials. Add a kill switch before campaigns.
Read next
These pages are already on the site. Use them to pressure-test the bet before a call.
Security checklist
Tool-agnostic secrets and Auth spine this a0.dev harden specializes.
a0.dev to production
The owned-origin pass if you need more than a public-track harden.
Auth and data checklist
RLS and session after you lock open RN routes.
App Store / Play ready
Privacy strings and crash soak before review.
Proof dashboard
Named charts and methodology for the headline numbers.
Book a discovery call
Thirty minutes with a senior teammate. Honest next steps.
Verified on Clutch · 29 reviews
“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.”
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CEO · Ombligo, Inc.
Read on Clutch“Their project management was top-notch.”
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Technology Executive · Driven Brands Inc.
Read on Clutch“Their eye for clean, modern design combined with technical excellence was very impressive.”
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Founder · Lean Coach
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Marketing Director · Lex Mundi
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Co-Owner · Cap Tech Services, LLC.
Read on Clutch“They are very thorough in their approach to the project.”
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Member Board of Directors · Protect Our Winters Action Fund
Read on ClutchInternals
Stay inside the vibe-coding cluster, or open booking and the Austin money page.
Continue
Shared intents and the rest of the a0.dev pack.
Continue
When the public a0 track should stop being the release plane entirely.
Continue
If agent rhythm stays and only store ACLs need to move.
Continue
When the next step is extract-and-normalize into standard mobile CI.
Continue
Bring the public TestFlight and who can open Deployment.
Continue
Named charts and methodology behind the headline numbers.
Continue
Studio page if you want a partner sealing a public a0.dev MVP.
Before you book
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Shared invite links leak; bots probe Auth and write paths against the same Convex/Supabase project the agent wired; anonymous callers hammer built-in AI inference routes without rate limits. Assume every track URL and listing is discoverable once shared in a tweet or README. Cap spend and require Auth before costly routes.
Privacy nutrition labels, data-safety disclosures, and permission justifications must match what the Expo app actually collects—Auth, analytics, payments, and any a0 built-in APIs. Do not ship placeholder copy the agent invented. Incomplete or mismatched strings stall review and create compliance risk after you already have installs.
Enforce Auth and RLS (or equivalent) on every write and expensive read; rotate any keys that appeared in agent transcripts; separate developer personal projects from the production backend bag. Add alerts on anomalous usage. Public binaries plus open backends equal a billable surface even before AdWords spend.
Subscriptions and payments configured via a0 must reject when store/env credentials are missing or wrong—never silently charge a sandbox merchant account in production. Document whether production uses a0 one-click publish (higher lock-in) or org EAS uploads. Hardening fails if launch day is the first time you learn the agent left debug Auth or unbounded inference on a public track.
Bring the share link and the Convex/Supabase project. We will name the abuse path that would burn quota in week one — or tell you Auth already fails closed.
Prefer writing? Send project details on the contact page.